EP2244152A1 - Schalt- und/oder Einstellelement für ein Gerät, insbesondere für ein Haushaltsgerät - Google Patents

Schalt- und/oder Einstellelement für ein Gerät, insbesondere für ein Haushaltsgerät Download PDF

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Publication number
EP2244152A1
EP2244152A1 EP09005691A EP09005691A EP2244152A1 EP 2244152 A1 EP2244152 A1 EP 2244152A1 EP 09005691 A EP09005691 A EP 09005691A EP 09005691 A EP09005691 A EP 09005691A EP 2244152 A1 EP2244152 A1 EP 2244152A1
Authority
EP
European Patent Office
Prior art keywords
switching
shaft
adjusting element
element according
crank head
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.)
Withdrawn
Application number
EP09005691A
Other languages
English (en)
French (fr)
Inventor
Klaus Winkelmann
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP09005691A priority Critical patent/EP2244152A1/de
Publication of EP2244152A1 publication Critical patent/EP2244152A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/08—Controlling members for hand actuation by rotary movement, e.g. hand wheels
    • G05G1/087—Controlling members for hand actuation by rotary movement, e.g. hand wheels retractable; Flush control knobs
    • 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
    • H01H3/08—Turn knobs
    • H01H2003/085—Retractable turn knobs, e.g. flush mounted

Definitions

  • the invention relates to a switching and/or adjusting element for an appliance, especially for a domestic appliance, for switching and/or adjusting an operation parameter of the appliance by rotating an adjusting knob around an axis.
  • Switching or adjusting elements of this kind are well known in the art. They are used e. g. for selecting the temperature or intensity of a heating element of a domestic oven by turning a knob to a definite angular position.
  • a special design of such a switching or adjustment element comes up with the possibility that the adjustment knob of the element can be moved axially between two different positions. In a first position the adjustment knob protrudes from a faceplate of the domestic appliance for ergonomically rotating the adjustment knob into the desired position. After this, the adjustment know can be pressed axially into a second position, so that substantially a flat surface of the faceplate plus switching element comes into being.
  • the switching or adjustment element must be equipped in this case with arresting means which allow the positioning of the adjustment knob in the two mentioned positions.
  • Respective solutions are known from DE 103 06 583 A1 , from EP 1 712 974 B1 , from EP 1 526 422 B1 , from EP 0 671 681 B1 , from WO 2007/008182 A1 , from WO 98/11574 and from DE 10 2007 002 183 A1 .
  • the pre-known designs have some drawbacks: In some applications a quite huge number of parts are necessary which causes respective high costs for manufacturing and assembly. Furthermore, it has been found that the switching noises are quite loud. Finally, the required guide rails for the cooperation with a crank head weaken the parts so that the stiffness of some of the pre-known solutions is not satisfactory.
  • the solution of this object according to the invention is characterized in that the switching and/or adjusting element has the following features:
  • the adjusting knob is arranged torque proof on a shaft which can be moved axially along the axis and can be arrested in a first position and in a second position.
  • the shaft has an opening along at least a part of its axial extension.
  • a housing element is fixed at the appliance, having a carrier part which can be inserted in axial direction into the opening.
  • Spring means are arranged for axially biasing the shaft relatively to the carrier part.
  • means for preventing rotation are arranged at the shaft and the carrier part for preventing a relative rotation between the shaft and the carrier part.
  • Arresting means are arranged for selectively arresting the shaft in the first or in the second position, wherein the arresting means comprise one single elastic arm which is fixed with the housing element and which has a crank head at its axial end and wherein the crank head contacts the shaft at a radial outer side at a guide rail which is arranged in the radial outer side of the shaft.
  • the means for preventing rotation are preferably formed by at least one radial extending rib which is arranged at the outer circumference of the carrier part, wherein the rib extends into a recess which extends in axial direction and which is arranged in the inner surface of the opening.
  • the housing element, the carrier part and the elastic arm are preferably made of one single piece.
  • the housing element, the carrier part and the elastic arm are made from plastic material. Normally an injection moulding process is employed for this.
  • the guide rail for the crank head has a first guiding area with a ramp part for deflecting the elastic arm in the circumferential direction of the shaft.
  • the guide rail for the crank head can have a second guiding area opposite to the first guiding area.
  • the second guiding area can have a flat surface.
  • a slanted section is arranged at the radial outer side along a part of the second guiding area for moving the crank head in radial direction during its travel along the slanted section.
  • first and the second guiding areas are merging at one location in a transition area at one common radial level.
  • the first and the second guiding areas can furthermore merge at another location in a transition area, wherein the transition area comprises a radial step.
  • the guide rail can comprises a first hook section for arresting the crank head of the elastic arm in the first position. Also, the guide rail can comprises a second hook section for arresting the crank head of the elastic arm in the second position.
  • the guide rail can comprises a deflection surface which is arranged near the transition area, wherein the deflection surface is arranged under an angle relatively to the axial direction for deflecting the crank head in the circumferential direction of the shaft.
  • the crank head can then have a corresponding counter surface with the same angle as the deflection surface.
  • the spring means are beneficially a coil spring.
  • the switching and/or adjusting element is preferably part of a domestic oven.
  • the parts and especially the shaft do not need big recesses for the engagement of the crank head into the guide rail and thus a quite stiff design is reached. This allows also a reduction in material and weight of the element. So, also a spring element with a bigger diameter can be employed with an improved spring characteristic.
  • Another advantage of the proposed invention is that the guide track for the crank head does not have any openings or apertures thus making the guide track quite stable. In pre-known solutions such openings are provided in the guide track.
  • FIG 1 till FIG 8 a switching and/or adjusting element 1 of a domestic oven and its parts are shown by which an operation parameter of the domestic appliance can be adjusted.
  • an adjustment knob 2 is employed for adjusting the parameter.
  • the adjustment knob 2 has a substantial cylindrical shape. It can be rotated around an axis 3 to a desired rotational position.
  • the adjustment knob 2 is connected with a shaft 4 in a torque proof way.
  • the shaft 4 has an opening 5 (see FIG 2 ) with substantially circular cross section.
  • a housing element 6 is connected to the domestic appliance and has a carrier part 7 with a substantially cylindrical shape.
  • the diameter of the carrier part 7 fits to the opening 5, i. e. the carrier part 7 can be inserted into the opening 5.
  • a spring means being a coil spring are arranged between the shaft 4 and the carrier part 7 which force those two parts away from another in axial direction a.
  • Those means consist of a radial extending rib 9 at the outer circumference of the carrier part 7 extending into a corresponding recess 10 which is formed into the inner surface of the opening 5 (see specifically FIG 2 ).
  • the adjusting knob 2 with the shaft 4 can be arrested in two positions A and B relatively to the housing element 6 and the carrier part 7 respectively.
  • the adjusting knob 2 In the first position A (see e. g. FIG 1 ) the adjusting knob 2 is pushed in a telescopic way into the housing element 6 to obtain a flat surface of the operation panel of the domestic appliance.
  • the second position B (see e. g. FIG 2 ) is used for turning the adjusting knob 2.
  • the adjusting knob 2 protrudes out from the operation panel of the appliance.
  • Arresting means 11 (see FIG 1 ) are employed to move the adjusting knob 2 and the shaft 4 between the two positions A and B.
  • the arresting means 11 have a single elastic arm 12 which is formed from the material of the housing element 6 and the carrier part 7.
  • the elastic arm 12 has a crank head 13 at its axial end.
  • the shaft 4 is equipped with a guide trail 15 at a radial outer side 14 of the shaft 4.
  • This guide trail 15 is designed to cooperate with the crank head 13 of the elastic arm 12.
  • the guide trail 15 has a first guiding area 16, comprising a ramp part 17. Furthermore, the guide trail 15 has a second guiding area 18, being arranged opposite to the first guiding area 16.
  • the first and the second guiding areas 16 and 18 form slides for the crank head 13 of the elastic arm 12 when a relative axial movement between the shaft 4 and the carrier part 7 occurs.
  • transition areas 19', 19" are arranged at which the crank head 13 can transit from the first guiding area 16 to the second guiding area 18. While the transition at one end takes place at a common radial level (see transition area 19'), the transition area 19" at the other end has a radial step 20 (see FIG 5 ).
  • a first hook section 21 and a second hook section 22 are arranged in the respective location.
  • the crank head 13 of the elastic arm 12 can hook into the respective hook sections 21 and 22.
  • the adjusting knob 2 is pressed axially.
  • the movement of the shaft 4 presses the chamfer 29 (see FIG 8 ) against the third guiding area 26, so that the crank head 13 is pushed in circumferential direction until a side area 30 of the crank head 13 (see FIG 7 ) slides down the radial step 20 (due to a radial biasing of the elastic arm 12 against the radial outer side 14 of the shaft 4), so that the crank head 13 contacts the second guiding area 18.
  • the shaft 4 can slide into the position B relatively to the housing element 6 and the carrier part 7 respectively due to the force of the spring means 8.
  • the side area 30 of the crank head 13 slides along the second guiding area 18, while a bottom surface 31 of the crank head 13 (see FIG 6 ) contacts the radial outer side 14 of the shaft 4 and more specifically the sliding track 32 (see FIG 7 ).
  • the sliding track 32 has a slanted section 33 (see FIG 1 and FIG 7 ) which brings the crank head 13 radially back to the radial position which is reached in the position B, i. e. the slanted section 33 balances the radial difference of the radial step 20.
  • the crank head 13 snaps due to the elastic property of the elastic arm 12 back in the initial position, i. e. when reached the transition area 19'.
  • the final position B is reached, when a hook part 34 (see FIG 8 ) of the crank head 13 hooks into the second hook section 22.
  • a deflection surface 23 (see FIG 5 ) of the guide rail 15 and a corresponding counter surface 24 of the crank head 13 (see Fig 6 and Fig 7 ) make sure that a relative axial movements of the parts 4 and 7 cause a movement of the crank head 13 to the side, i. e. in circumferential direction.
  • the chamfer 29 and the counter surface 24 correspond to another.
  • the elastic arm 12 and also the sliding surfaces which are contacted radially by the crank head 13 can be arranged in a slanted way so that the elastic arm 12 is not biased in the position A and/or B.
  • the operation of the switching and/or adjusting element 1 is as follows: When the element is brought into the position A the crank head 13 of the elastic arm 12 slides along the first guiding area 16 and the ramp part 17 on the support area 25. The crank head 13 of the elastic arm 12 is pressed by this operation in circumferential direction by the first guiding area 16; also the crank head 13 contacts radially the radial outer side 14. If the crank head 13 has passed the first guiding area 16 it snaps back in the initial middle position due to the elastic property of the elastic arm 12. If the axial pressure onto the adjusting knob 2 is now released the upper side 27 of the crank head 13 slides below the slant 28 of the first hook section 21.
  • the operation of the switching and/or adjusting element 1 is as follows: When the element is brought into the position A the crank head 13 of the elastic arm 12 slides along the first guiding area 16 and the ramp part 17. By this the crank head 13 is pushed to the side in circumferential direction by the first guiding area 16 and ramp part 17. If the crank head 13 has passed the first guiding area 16 it snaps back and contacts a limitations area 35 (see FIG 23 ). If the axial pressure onto the adjusting knob 2 is now released the side area 30 of the crank head 13 slides now along the limitation area 35 until the crank head 13 is completely in front of the limitation area 35. Only now the crank head 13 can snap back into its middle or initial position due to the elastic property of the elastic arm 12. Now the hook part 34 can slide under the first hook section 21.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Control Devices (AREA)
EP09005691A 2009-04-23 2009-04-23 Schalt- und/oder Einstellelement für ein Gerät, insbesondere für ein Haushaltsgerät Withdrawn EP2244152A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09005691A EP2244152A1 (de) 2009-04-23 2009-04-23 Schalt- und/oder Einstellelement für ein Gerät, insbesondere für ein Haushaltsgerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09005691A EP2244152A1 (de) 2009-04-23 2009-04-23 Schalt- und/oder Einstellelement für ein Gerät, insbesondere für ein Haushaltsgerät

Publications (1)

Publication Number Publication Date
EP2244152A1 true EP2244152A1 (de) 2010-10-27

Family

ID=41009994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09005691A Withdrawn EP2244152A1 (de) 2009-04-23 2009-04-23 Schalt- und/oder Einstellelement für ein Gerät, insbesondere für ein Haushaltsgerät

Country Status (1)

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EP (1) EP2244152A1 (de)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322442A1 (fr) * 1975-08-29 1977-03-25 Tschudin & Heid Ag Interrupteur a bouton-poussoir
DE4230160A1 (de) * 1992-09-09 1994-03-10 Bosch Siemens Hausgeraete Drehknebel
WO1998011574A1 (en) 1996-09-12 1998-03-19 Arçelik A.S. Control knob used for household appliances
EP0671681B1 (de) 1994-03-09 1998-07-08 Whirlpool Europe B.V. Versenkbarer Drehknebel
DE10306583A1 (de) 2003-02-17 2004-09-02 BSH Bosch und Siemens Hausgeräte GmbH Lagervorrichtung für einen versenkbaren Knebel
WO2007008182A2 (en) 2005-07-08 2007-01-18 Ocak Kalip Imalat San. Ve Tic. Ltd. Sti. Improvement in control button used in cookers
EP1526422B1 (de) 2003-10-22 2007-02-14 Lisi Automotive Rapid Versenkbare Drehgriffvorrichtung einer Schalt-oder Stelleinrichtung insbesondere eines Haushaltsgeräts
WO2008039159A1 (en) * 2006-09-27 2008-04-03 Ocak Kalip Makina Imalat Sanayi Ve Ticaret Limited Sirketi Reinforced locker in control knob mechanisms
DE102007002183A1 (de) 2007-01-15 2008-07-17 BSH Bosch und Siemens Hausgeräte GmbH Lagervorrichtung für ein versenkbares Bedienelement
EP1712974B1 (de) 2005-04-13 2008-08-27 Lisi Automotive Rapid Versenkbare Drehgriffvorrichtung einer Schalt-oder Stelleinrichtung insbesondere eines Haushaltsgeräts

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322442A1 (fr) * 1975-08-29 1977-03-25 Tschudin & Heid Ag Interrupteur a bouton-poussoir
DE4230160A1 (de) * 1992-09-09 1994-03-10 Bosch Siemens Hausgeraete Drehknebel
EP0671681B1 (de) 1994-03-09 1998-07-08 Whirlpool Europe B.V. Versenkbarer Drehknebel
WO1998011574A1 (en) 1996-09-12 1998-03-19 Arçelik A.S. Control knob used for household appliances
DE10306583A1 (de) 2003-02-17 2004-09-02 BSH Bosch und Siemens Hausgeräte GmbH Lagervorrichtung für einen versenkbaren Knebel
EP1526422B1 (de) 2003-10-22 2007-02-14 Lisi Automotive Rapid Versenkbare Drehgriffvorrichtung einer Schalt-oder Stelleinrichtung insbesondere eines Haushaltsgeräts
EP1712974B1 (de) 2005-04-13 2008-08-27 Lisi Automotive Rapid Versenkbare Drehgriffvorrichtung einer Schalt-oder Stelleinrichtung insbesondere eines Haushaltsgeräts
WO2007008182A2 (en) 2005-07-08 2007-01-18 Ocak Kalip Imalat San. Ve Tic. Ltd. Sti. Improvement in control button used in cookers
WO2008039159A1 (en) * 2006-09-27 2008-04-03 Ocak Kalip Makina Imalat Sanayi Ve Ticaret Limited Sirketi Reinforced locker in control knob mechanisms
DE102007002183A1 (de) 2007-01-15 2008-07-17 BSH Bosch und Siemens Hausgeräte GmbH Lagervorrichtung für ein versenkbares Bedienelement

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