EP3338292B1 - Dispositif de commande d'un dispositif pourvu d'un ou de plusieurs composants électroniques - Google Patents

Dispositif de commande d'un dispositif pourvu d'un ou de plusieurs composants électroniques Download PDF

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Publication number
EP3338292B1
EP3338292B1 EP16757171.0A EP16757171A EP3338292B1 EP 3338292 B1 EP3338292 B1 EP 3338292B1 EP 16757171 A EP16757171 A EP 16757171A EP 3338292 B1 EP3338292 B1 EP 3338292B1
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EP
European Patent Office
Prior art keywords
primary part
intermediate layer
primary
operating element
secondary part
Prior art date
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Application number
EP16757171.0A
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German (de)
English (en)
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EP3338292A1 (fr
Inventor
Johannes Edenhofer
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.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP3338292A1 publication Critical patent/EP3338292A1/fr
Application granted granted Critical
Publication of EP3338292B1 publication Critical patent/EP3338292B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/02—Details
    • H01H19/10—Movable parts; Contacts mounted thereon
    • H01H19/14—Operating parts, e.g. turn knob
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/12—Means for earthing parts of switch not normally conductively connected to the contacts

Definitions

  • the invention relates to an operating element for an electronic and / or an electrical device, in particular for a domestic appliance.
  • highly conductive (metallic or metallized) primary control elements e.g. a rotary knob
  • other conductive metallic secondary control elements e.g. with a control panel or with a housing
  • the use of metallic or metallized operating parts is usually desirable for design reasons and / or due to mechanical requirements.
  • the electronics of the device can be exposed to an ESD (electrostatic discharge) load when an operator touches a primary control panel. Touching the primary control unit can cause the primary control unit to charge up relatively quickly and then discharge the primary control unit to the secondary control unit (e.g. the housing of the device).
  • ESD secondary flashover By discharging onto the secondary control panel, i.e. A so-called ESD secondary flashover can lead to high transient electrical and magnetic fields in the area of the electronics of the device. These fields can lead to malfunctions in the electronics or destruction of the electronics.
  • Highly conductive secondary controls typically make RF (radio frequency) applications (e.g. connecting a device to a WLAN access point) more difficult.
  • highly conductive secondary control panels are usually associated with relatively high costs.
  • the use of highly conductive secondary controls leads to restrictions in terms of design, mechanics, optics, etc.
  • US2003 / 0111330 A1 discloses an operating element according to the preamble of claim 1.
  • the present document deals with the technical task of providing a control element for an electronic device, in particular for a domestic appliance, by means of which secondary flashovers are avoided or at least substantially damped, and yet which RF applications and expanded flexibility with regard to design requirements and / or mechanical Requirements for the electronic device allowed.
  • a control element for an electronic device or for a device that comprises one or more electronic components is described.
  • the device can comprise a domestic appliance, in particular a domestic appliance.
  • the control element (which can also be referred to as a design element) comprises an electrically conductive primary part, which is configured to be actuated by a user of the device in order to make an input to the device or to control the device.
  • the primary part can be such that it can be moved by a user for input.
  • the primary part can comprise a rotary knob or a slider.
  • the primary part can e.g. include a stainless steel.
  • the control element further comprises an electrically conductive secondary part which is arranged between (and / or in close proximity to) one or more electronic components (e.g. control electronics) of the device and the primary part.
  • the secondary part can have a fixed position relative to the one or more electronic components of the device.
  • the secondary part can comprise an operating panel or a housing of the device.
  • the primary part can have a higher electrical conductivity than the secondary part.
  • the secondary part can be coupled to GND or ground in order to discharge electrical charge.
  • a distance for example a minimal distance
  • the primary part When the primary part is actuated, a distance (for example a minimal distance) between the primary part and the secondary part can remain unchanged.
  • the rotary knob when using a rotary knob as the primary part, the rotary knob is typically rotated about an axis of rotation, so that even when the The distance (e.g. the minimum distance) between the rotary button and the secondary part (e.g. the control panel or the housing) remains unchanged.
  • the The distance e.g. the minimum distance
  • the secondary part e.g. the control panel or the housing
  • Even with a slider operating the slider typically does not change the distance between the slider and the secondary part (e.g. the control panel or the housing).
  • control element comprises an intermediate layer (which can also be referred to as a connection layer), which is arranged such that the primary part is located on a first side and the secondary part is located on a second side opposite the first side. Furthermore, the intermediate layer can touch the primary part on the first side and / or the secondary part on the second side. The intermediate layer can thus be arranged between the primary part and the secondary part.
  • an intermediate layer which can also be referred to as a connection layer
  • the intermediate layer can face the primary part on a first side and face the secondary part on a second side opposite the first side (and possibly touch the primary part and / or the secondary part), so that a secondary flashover of electrostatic charge is damped or avoided from the primary part to the secondary part due to a user touching the primary part by dissipating electrostatic charge from the primary part via the intermediate layer to the secondary part.
  • the primary part and the secondary part typically there is no direct contact between the primary part and the secondary part. This is particularly advantageous in the case of a movable primary part, in order to be able to move the primary part relative to the secondary part in a comfortable manner.
  • the primary part and the secondary part can also be so close to one another in a non-actuated state of the primary part that a secondary rollover from the primary part to the secondary part could occur if a user touches the primary part (also without pressing the primary part to make an entry).
  • the contact between the primary part and the secondary part can take place indirectly via the intermediate layer when an intermediate layer is provided.
  • the intermediate layer comprises a conductive plastic.
  • the intermediate layer with conductive plastic Due to the intermediate layer with conductive plastic, secondary flashovers from the primary part to the secondary part can be avoided or at least substantially dampened.
  • the electrostatic charge that forms on the primary part when a user touches the primary part can be dissipated from the primary part to the secondary part via the intermediate layer.
  • the derivation can already take place when the primary part is touched by a user, even without actuating the primary part (e.g. without turning a rotary knob or without moving a slider).
  • the discharge of electrostatic charge due to an existing (indirect) contact between the primary part and the secondary part via the intermediate layer can take place substantially simultaneously with a user touching the primary part.
  • the primary part, the secondary part and the intermediate layer can be arranged such that when the primary part is touched by a user without actuation of the primary part, the intermediate layer on the first side and the primary part on the second side secondary part touches.
  • This ensures reliable protection of one or more electronic components.
  • the intermediate layer with conductive plastic typically does not provide substantial shielding from electromagnetic radiation in the RF range, so that RF applications are made possible.
  • the intermediate layer can comprise a plastic with at least one conductive additive.
  • the additive can preferably comprise carbon fibers, conductive carbon black and / or nanotubes.
  • the additive in a cross section of the intermediate layer, which runs from the primary part to the secondary part, the additive preferably has a distribution which deviates by 20%, 10% or less from a uniform distribution. In other words, the distribution of an additive within the intermediate layer is preferably uniform. Reliable discharge of electrostatic charge from the primary part to the secondary part can thus be ensured.
  • the conductive plastic can be designed in such a way that a transverse resistance of the intermediate layer decreases with increasing voltage between the primary part and the secondary part.
  • the intermediate layer can have a resistance of approximately 16kOhm at a voltage of 10V and one at a voltage of 100V Have a resistance of approx. 10kOhm.
  • Such a voltage-dependent resistor can have the effect that the intermediate layer both enables reliable discharge of electrostatic charge and has the least possible shielding for RF rays.
  • the intermediate layer can be arranged between the primary part and the secondary part in such a way that, due to a relatively increased permittivity or dielectric conductivity ⁇ r of the intermediate layer (compared to the ambient air), field lines of an electric field between the primary part and the secondary part (at least partially) run through the intermediate layer.
  • the intermediate layer can be arranged between the primary part and the secondary part such that 80%, 90% or more of the field lines of the electric field run through the intermediate layer.
  • the intermediate layer can be arranged between the primary part and the secondary part in such a way that a relatively strong field increase (relative to the field strength at an outer edge of the intermediate layer) occurs at the intermediate layer.
  • the field strength in the intermediate layer can be a factor 5, 10 or more higher than the field strength at the outer edge of the intermediate layer.
  • the outer edge of the intermediate layer connects the first side of the intermediate layer with the second side of the intermediate layer.
  • the intermediate layer can be arranged between the primary part and the secondary part such that the density of field lines of the electric field in the intermediate layer is higher than the density of field lines of the electric field at the outer edge of the intermediate layer.
  • the density of the field lines in the intermediate layer can be a factor of 5, 10 or more higher than at the outer edge of the intermediate layer. In this way, reliable discharge of electrostatic charge (ESD current) from the primary part to the secondary part via the intermediate layer can be ensured. Furthermore, electrical energy of the electrostatic charge can be converted into heat by the electrical resistance of the intermediate layer.
  • the primary part comprises a knob with a cavity.
  • the rotary knob can be turned around an axis of rotation.
  • the intermediate layer can form a flat ring which is arranged in the cavity of the rotary knob and around the axis of rotation of the rotary knob.
  • the intermediate layer can have a surface on the second side with an average roughness relative to an average profile of the surface of the second side.
  • the average roughness can have a value of 5%, 10% or more relative to the average profile of the surface of the second side. Roughness on the second side can cause excessive stresses between the intermediate layer and the secondary part. An outflow of electrostatic charge from the primary part to the secondary part can thus be further improved.
  • the average course of the surface can e.g. form a flat surface or plane.
  • the actual course of the surface can differ at different points from the flat surface or plane in the positive direction (e.g. towards the secondary part) and / or in the negative direction (e.g. away from the secondary part).
  • a cross section through the second side of the surface of the intermediate layer may have a medium, linear, course, the actual course of the cross section fluctuating around the central, linear, course.
  • the extent of the fluctuations around the mean (linear or flat) course can be indicated by the mean roughness.
  • the mean roughness typically corresponds to the mean amount of deviation of the actual shape of the surface of the second side of the intermediate layer from the mean (linear or flat) shape of the surface of the second side of the intermediate layer.
  • the square roughness can be defined as the mean square deviation of the actual course of the surface of the second side of the intermediate layer from the mean (linear or planar) course of the surface of the second side of the intermediate layer.
  • a distance (for example a minimum distance) between the primary part and the secondary part can remain unchanged when the primary part is actuated (ie when an entry is made on the device). Furthermore, a distance (for example a minimum distance) between the intermediate layer and the primary part and / or a distance (for example a minimum distance) between the intermediate layer and the secondary part can remain unchanged when the primary part is actuated (in particular with respect to a distance, which is present when the primary part is not operated).
  • the primary part, the secondary part and the intermediate layer can be arranged such that when the primary is actuated In part (especially during the entire actuation process), a (possibly minimal) distance between the primary part and the intermediate layer remains unchanged (in particular, there may be contact between the primary part and the intermediate layer before and during the actuation of the primary part); and / or a (possibly minimal) distance between the secondary part and the intermediate layer remains unchanged (in particular, there may be contact between the secondary part and the intermediate layer before and during the actuation of the secondary part); and / or a (possibly minimal) distance between the primary part and the secondary part remains unchanged.
  • This is advantageous since mechanical stress on the primary part, the secondary part and / or the intermediate layer can be reduced.
  • an (electronic) device in particular a domestic appliance, is described, which comprises one or more electronic components and the operating element described in this document.
  • control element for an electrical and / or electronic device, by means of which secondary flashovers can be reduced and the electronics of the device can be protected.
  • control element should have the least possible shielding for Have electromagnetic radiation in the RF range to enable RF applications of the device.
  • Fig. 1 shows a block diagram of an exemplary device 100, in particular a household appliance, such as a washing machine, a dishwasher, an oven, etc.
  • the device 100 comprises an operating panel 102 and a rotary knob 101 arranged on the operating panel 102, which enables a user of the device 100 To make entries (e.g. select a program for a household appliance).
  • the control panel 102 can be part of the housing of the electronic device 100.
  • the rotary knob 101 and the control panel 102 can be viewed together as an operating element of the electronic device 100.
  • the rotary knob 101 can generally be referred to as a primary part or as a primary control part 101 of the control element which is touched by a user of the device 100 in order to make an input to the device 100 or to control the device 100.
  • the primary part 101 is often made of a highly conductive material. When touched, electrical charge can pass from the user to the primary part 101 of the control element.
  • the control panel 102 can be regarded as a secondary part or as a secondary control part of the device 100. This can lead to a secondary rollover in which electrical charge is transferred from the primary part 101 to the secondary part 102.
  • control panel 102 or the entire housing of the device 100 can be made of a highly conductive material (for example metal).
  • a highly conductive material for example metal
  • the control panel 102 or the housing can be constructed from a highly insulating material (eg plastic) without the use of metal parts in the vicinity of the electronics.
  • a highly insulating material eg plastic
  • moderately conductive materials are typically used to meet design and RF requirements.
  • these materials can lead to substantial secondary rollovers.
  • Fig. 2 shows a control element 200 of a device 100 in a side view.
  • the control element 200 comprises a primary part 101 (for example a rotary knob that can be rotated about an axis of rotation 201) and a secondary part 102 (for example a control panel).
  • Electronics 203 are located behind the secondary part 102 (for example, one or more electronic components for evaluating an input made on the primary part 101). Electronics 203 could be damaged due to a secondary rollover onto secondary part 102.
  • the control element 200 further comprises an intermediate layer 202, which is arranged between the primary part 101 and the secondary part 102 of the control element 200.
  • the intermediate layer 202 may be in contact with the primary part 101 on a first side and may be in contact with the secondary part 102 on a second side (opposite the first side).
  • the intermediate layer 202 can be arranged between the primary part 101 and the secondary part 102 in such a way that the field lines of an electric field 210 between the primary part 101 and the secondary part 102 (in particular an electric field 210 which results from electrostatic charging of the primary Part 101 originates) through the intermediate layer 202.
  • This condition can be at least partially fulfilled, e.g. 80%, 90% or more of the field lines of the electric field 210 can pass through the intermediate layer 202.
  • Intermediate layer 202 may include a plastic that includes conductive additives.
  • the intermediate layer 202 may comprise a conductive plastic.
  • Exemplary conductive additives are materials such as e.g. Carbon fibers (e.g. with a concentration of 8%), conductive carbon black and / or nanotubes e.g. ULTRAFORM® N2320 C BLACK 110 POLYACETAL.
  • the conductive additives can change the properties of plastics in such a way that the charge of an ESD flashover does not flow over an air gap between the primary part 101 and the secondary part 102 or along the surface of the intermediate layer 202, but rather is conducted in the intermediate layer 202.
  • the conductive additives can be set in such a way that the intermediate layer 202 is relatively low-ohmic for relatively high voltages and relatively high-resistance for relatively low voltages. As a result, the intermediate layer 202 does not substantially attenuate electromagnetic radiation in the RF range.
  • charge can be conducted from the primary part 101 without generating a substantial electric shock through the intermediate layer 202 to the secondary part 102 and possibly from there to ground (GND).
  • the maximum current from the primary part 101 to the secondary part 102 is limited by the resistance of the intermediate layer 202.
  • Fig. 3 shows exemplary courses 311, 312 of the current 302 over time 301 when the primary part 101 is discharged onto the secondary part 102.
  • a secondary rollover takes place via an air layer between the primary part 101 and the secondary part 102.
  • This secondary rollover points significant current peaks that can affect electronics 203.
  • the course 312 shows the discharge via an intermediate layer 202 with conductive plastic. It can be seen that significant current peaks and the associated risk to the electronics 203 can be avoided.
  • an operating element 200 for an electronic device 100 thus makes it possible to avoid endangering the electronics 203 of the electronic device 100 from secondary flashovers. RF applications are not affected by the control element 200.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Mechanical Control Devices (AREA)
  • Elimination Of Static Electricity (AREA)

Claims (10)

  1. Élément de commande (200) pour un appareil (100) qui comprend un ou plusieurs composants électroniques (203), l'élément de commande (200) comprenant
    - une partie primaire (101) électroconductrice qui est configurée pour être actionnée par un utilisateur de l'appareil (100) afin d'effectuer une entrée sur l'appareil (100),
    - une partie secondaire (102) électroconductrice qui est disposée entre l'un ou les plusieurs composants électroniques (203) de l'appareil (100) et la partie primaire (101), la partie secondaire (102) étant un bandeau de commande ou un boîtier de l'appareil (100), et
    - une couche intermédiaire (202) qui comprend une matière plastique conductrice et qui, sur un premier côté, est tournée vers la partie primaire (101) et, sur un deuxième côté opposé au premier côté, est tournée vers la partie secondaire (102) de sorte qu'un claquage secondaire de charge électrostatique de la partie primaire (101) sur la partie secondaire (102) suite à un contact de la partie primaire (101) par un utilisateur est amorti ou évité en raison de la décharge de la charge électrostatique de la partie primaire (101) vers la partie secondaire (102) par l'intermédiaire de la couche intermédiaire (202), caractérisé en ce que la partie primaire (101) est un bouton rotatif ou un curseur.
  2. Élément de commande (200) selon la revendication 1,
    - la couche intermédiaire (202) comprenant une matière plastique dotée d'au moins un additif conducteur ; et
    - l'additif comprenant notamment des fibres de carbone, du noir de carbone et/ou des nanotubes.
  3. Élément de commande (200) selon l'une quelconque des revendications précédentes,
    - la partie primaire (101) étant telle qu'elle puisse être bougée, notamment tournée, par un utilisateur pour une entrée ; et/ou
    - la partie secondaire (102) présentant une position fixe par rapport à l'un ou aux plusieurs composants électroniques (203) de l'appareil (100).
  4. Élément de commande (200) selon l'une quelconque des revendications précédentes,
    - la partie primaire (101) étant un bouton rotatif comprenant un espace creux ;
    - le bouton rotatif pouvant être tourné autour d'un axe de rotation (201) ; et
    - la couche intermédiaire (202) formant un anneau plat qui est disposé dans l'espace creux du bouton rotatif et autour de l'axe de rotation (201) du bouton rotatif.
  5. Élément de commande (200) selon l'une quelconque des revendications précédentes,
    - la partie primaire (101) présentant une conductivité électrique plus élevée que la partie secondaire (102) ; et/ou
    - la partie primaire (101) étant en acier inoxydable.
  6. Élément de commande (200) selon l'une quelconque des revendications précédentes, la partie secondaire (102) étant couplée à la masse afin de décharger la charge électrique.
  7. Élément de commande (200) selon l'une quelconque des revendications précédentes, l'appareil (100) étant un appareil domestique, notamment un appareil ménager.
  8. Élément de commande (200) selon l'une quelconque des revendications précédentes, la partie primaire (101), la partie secondaire (102) et la couche intermédiaire (202) étant disposées de manière à ce que lors d'un actionnement de la partie primaire (101)
    - un écart entre la partie primaire (101) et la couche intermédiaire (202) reste inchangé ;
    - un écart entre la partie secondaire (102) et la couche intermédiaire (202) reste inchangé ; et/ou
    - un écart entre la partie primaire (101) et la partie secondaire (102) reste inchangé.
  9. Élément de commande (200) selon l'une quelconque des revendications précédentes, la partie primaire (101), la partie secondaire (102) et la couche intermédiaire (202) étant disposées de manière à ce que déjà lors d'un contact de la partie primaire (101) par un utilisateur sans actionnement de la partie primaire (101), la couche intermédiaire (202) sur le premier côté touche la partie primaire (101) et sur le deuxième côté touche la partie secondaire (102).
  10. Appareil (100) qui comprend
    - un ou plusieurs composants électroniques (203) ; et
    - un élément de commande (200) selon l'une quelconque des revendications précédentes.
EP16757171.0A 2015-08-21 2016-08-10 Dispositif de commande d'un dispositif pourvu d'un ou de plusieurs composants électroniques Active EP3338292B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015215988.4A DE102015215988A1 (de) 2015-08-21 2015-08-21 Bedienelement für ein Gerät mit ein oder mehreren Elektronik-Komponenten
PCT/EP2016/069035 WO2017032603A1 (fr) 2015-08-21 2016-08-10 Dispositif de commande d'un dispositif pourvu d'un ou de plusieurs composants électroniques

Publications (2)

Publication Number Publication Date
EP3338292A1 EP3338292A1 (fr) 2018-06-27
EP3338292B1 true EP3338292B1 (fr) 2020-04-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16757171.0A Active EP3338292B1 (fr) 2015-08-21 2016-08-10 Dispositif de commande d'un dispositif pourvu d'un ou de plusieurs composants électroniques

Country Status (3)

Country Link
EP (1) EP3338292B1 (fr)
DE (1) DE102015215988A1 (fr)
WO (1) WO2017032603A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109582185A (zh) * 2018-11-09 2019-04-05 合肥景彰科技有限公司 一种智能家电触摸控制装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5335137A (en) * 1992-07-29 1994-08-02 Key Tronic Corporation Computer keyboard with electrostatic discharge feature
US6987233B2 (en) * 2001-03-12 2006-01-17 Magtech Usa, Inc. Push-button type electrical switch having secondary conductive pathway to ground
US6590176B2 (en) * 2001-03-12 2003-07-08 Joseph W. Cole Push-button type electrical switch
DE10251329A1 (de) * 2002-11-05 2004-05-13 Friedrich Feilcke Vorrichtung zum Ausgleich elektrostatischer Ladungen von Personen und Gegenständen
WO2008074706A1 (fr) * 2006-12-18 2008-06-26 Arcelik Anonim Sirketi Appareil électroménager

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2017032603A1 (fr) 2017-03-02
DE102015215988A1 (de) 2017-02-23
EP3338292A1 (fr) 2018-06-27

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