EP1425770B1 - Dispositif de réglage et de commande pour appareils électriques - Google Patents

Dispositif de réglage et de commande pour appareils électriques Download PDF

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Publication number
EP1425770B1
EP1425770B1 EP02776666A EP02776666A EP1425770B1 EP 1425770 B1 EP1425770 B1 EP 1425770B1 EP 02776666 A EP02776666 A EP 02776666A EP 02776666 A EP02776666 A EP 02776666A EP 1425770 B1 EP1425770 B1 EP 1425770B1
Authority
EP
European Patent Office
Prior art keywords
electric
point value
digital code
electric motor
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.)
Expired - Lifetime
Application number
EP02776666A
Other languages
German (de)
English (en)
Other versions
EP1425770A1 (fr
Inventor
Daniel Hafen
Michael Bufe
Peter Broghammer
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.)
Marquardt GmbH
Original Assignee
Marquardt GmbH
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 Marquardt GmbH filed Critical Marquardt GmbH
Publication of EP1425770A1 publication Critical patent/EP1425770A1/fr
Application granted granted Critical
Publication of EP1425770B1 publication Critical patent/EP1425770B1/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
    • 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
    • H01H19/54—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 the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/58—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
    • H01H19/585—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch provided with printed circuit contacts
    • 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
    • H01H15/12—Operating parts adapted for operation by a part of the human body other than the hand, e.g. by foot
    • 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
    • H01H9/02—Bases, casings, or covers
    • H01H9/06—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner

Definitions

  • the invention relates to a setpoint device according to the preamble of patent claim 1.
  • an electrical switch with a manually adjustable between an output and an end position actuator is known.
  • the actuator is operatively connected to a potentiometer which emits a voltage corresponding to the adjustment of the actuator.
  • the potentiometer thus serves as a setpoint device for generating an associated setpoint, which is represented in this case by the electrical voltage.
  • This set value is supplied to a control device in the switch, wherein the control device operates, controls and / or regulates an electric motor as a function of this setpoint. For example, the control device sets the speed of the power tool according to the adjustment made by the user of the actuator.
  • the potentiometer in the switch consists of a slider and a resistance track, the slider by the operative connection with the actuator on the Resistance path slides.
  • the resistor track is made by printing a resistor paste on a printed circuit board.
  • the production of the resistance track is complex and sensitive to tolerances.
  • the potentiometer is therefore an expensive component on the one hand and on the other hand, this can disadvantageously also lead to increased rejects.
  • GB 2 314 980 A has disclosed an electrical switch for a power tool, in which the resistance path for the potentiometer is replaced by individual discrete resistors. Apart from the consequent even higher costs due to the large number of resistors, which ultimately require an even more complex production of the setpoint device, the aforementioned problem of tolerance sensitivity is present here as well.
  • setpoint devices such as those for a gas or goods counter from GB 2 168 862 A and for a volume control in a radio from US Pat. No. 5,739,775 A.
  • the setpoint device according to US Pat. No. 5,739,775 A has a rotor with grinders as contact elements, wherein a slider cooperate with a grounded contact ring and the other grinder according to the angular position of the rotor with contact segments for generating the digital code.
  • EP 0 570 870 A2 describes a digitally operating rotary selector switch in a domestic appliance.
  • the rotary selector switch has light emitting diodes and photoreceptor and a turntable with a coding pattern, which has different optical properties in partial areas, so that a digital code is generated according to the position of the turntable.
  • the invention is based on the US 5,739,775 A the task of specifying a further use for the setpoint device. Furthermore, the electrical switch according to DE 197 08 939 A1 should be further developed in such a way that it is less sensitive to tolerances. In particular, it should be dispensed with the use of a resistance track and / or resistors in the setpoint device.
  • the adjustment path for the actuator between the initial and the end position is divided into several sections in the manner of stages, each of these sections is assigned a different digital code.
  • the setpoint device is designed such that it generates the adjustment path of the actuator associated digital code as the setpoint.
  • this digital code is then processed for the corresponding operation of the electric motor. Since the digital code, in contrast to an analog resistance value is not subject to tolerances, the switch according to the invention does not have the disadvantages of the prior art. Further embodiments of the invention are the subject of the dependent claims.
  • the digital code generated by the setpoint device can be supplied directly and directly to the control device.
  • a pre-processing or further processing in the setpoint device is not required, whereby the setpoint device according to the invention represents an overall cost-effective solution.
  • the processing methods common in digital technology it makes sense to use the number of sections as To choose power of two. In order to achieve a sufficiently large resolution of the setpoint device without much effort, it has proven to be convenient to divide the adjustment into eight sections.
  • the setpoint device can have a grinder and contact surfaces assigned to the respective section of the adjustment path.
  • the grinder acts according to its Verstellweges then electrically contacting together with the respective contact surfaces, so that the respective digital code can be tapped from the electrically contacted contact surfaces in a simple manner.
  • a contacted contact surface is expediently regarded as a logical "one" and a non-contacted contact surface as a logical "zero".
  • the switch has a housing. On the actuator a reaching into the housing ram is attached. Inside the housing, a lug for attaching the grinder is arranged on the plunger.
  • the exterior of this switch is thus designed substantially in a conventional manner, so that the switch according to the invention can be used without further changes in the power tool instead of a conventional switch.
  • the contact surfaces are located on a circuit board.
  • the contact surfaces may be in the form of printed conductors, in particular in a different arrangement and / or length, be configured, whereby the setpoint device can be realized in a small space.
  • the circuit board is protected from harmful influences in the housing of the switch, in such a way that the grinder is movable on the contact surfaces along the adjustment path in the manner of a slider track.
  • it is further favorable to equip the grinder with a plurality of Schleiferfingem, wherein a respective Schleiferfinger cooperates with a contact surface.
  • the control device can be used as electronic and / or electrical circuit for controlling and / or regulating the Be formed electric motor.
  • the circuit for the control device is designed as an electronic digital and / or analog circuit.
  • the control device is a microprocessor and / or a microcontroller, in particular a single-chip microprocessor.
  • the microprocessor and / or microcontroller is equipped for the purpose of good resolution with at least three inputs for the digital code, so that the adjustment path can be divided into at least eight sections.
  • the inputs can be electrically connected directly to one contact surface, thereby saving space and costs.
  • the feel of the switch is easily adaptable to the wishes of the user and on the other hand, additional functions of the control device can be realized without additional effort.
  • control device is used to control and / or regulate the speed and / or the torque of the electric motor in functional dependence on the digital code generated by the setpoint device.
  • the switch according to the invention then contains as a control device a pulse width modulation control for a DC voltage-driven electric motor or a phase control for a voltage-operated electric motor.
  • the digital code can be a binary or dual code.
  • this code is configured in one step.
  • it may be a Gray code, which advantageously has a particularly high level of error safety.
  • the setpoint device can not only be used in electrical switches, but can also be used independently. Such a setpoint device is in turn so operatively connected to an adjustable between an output and an end position actuator that a the adjustment of the actuator associated setpoint can be generated.
  • the setpoint device has an electrical output for providing the setpoint.
  • the adjustment path between the initial and the end position in several Sections, in particular divided into at least two sections, in the manner of stages, each section being associated with a different digital code.
  • the desired value of the adjustment path of the actuator associated digital code is generated and this provided at an existing electrical connections output.
  • the setpoint device can of course also be provided with the described embodiments.
  • the advantages achieved by the invention are, in particular, that the large tolerances that conventionally occur when printing the resistance path and / or individual discrete resistors are not to be considered further.
  • the control device such as a conventional pulse width modulation circuit, has no more series variations of the duty cycle and the operating frequency. Nor do any fluctuations occur over the life of the switch.
  • the life of the setpoint device is increased in comparison to the previously used potentiometer.
  • the preparation of the setpoint device, in particular the printed circuit board used herein, is simplified.
  • the proportion of the setpoint device on the circuit board requires less space, so that now additional functions that can only be realized very expensive due to the limited space in the switch, can be integrated into the switch according to the invention with little effort and largely without additional costs.
  • the electrical switch 1 is used in an electrical device that is powered by a voltage source.
  • the electric switch 1 is used in a power tool such as an electric drill, a hammer drill, an electric screwdriver or the like.
  • a power tool such as an electric drill, a hammer drill, an electric screwdriver or the like.
  • Fig. 1 the schematic diagram for the arrangement of the electrical switch 1 in a power tool, which is powered by the AC line voltage U, shown in more detail.
  • the electric motor 2 has an electric motor 2 with field windings 3.
  • the electric motor 2 is switched on and off by the user by actuation of the switch 1, which is located, for example, in the handle of the power tool, and its speed is adjusted by means of the switch 1.
  • the switch 1 has a handle formed as an actuator 4, which serves as a handle for the user and is manually adjustable between an initial and an end position.
  • a control device 8 which is connected to a power semiconductor 9, such as a triac or the like.
  • the control device 8 and the power semiconductor 9 operate in the manner of a phase control.
  • the contact system 5 Due to the manual movement of the actuating member 4 from the initial position, the contact system 5 is first closed and the AC line voltage U is applied to the electric motor 2 via the power semiconductor 9. Next is the setpoint device 7 generates a desired value which is assigned to the adjustment path of the actuating member 4, starting from the starting position. This setpoint is then fed to the control device 8.
  • the control device 8 ignites in functional dependence on the setpoint the power semiconductor 9 at the corresponding phase or Stromflußwinkel the AC line voltage U, so that finally set the position of the actuator 4 corresponding speed of the electric motor 2 and optionally regulated.
  • the actuator 4 is in its end position, which corresponds to the maximum displacement starting from the starting position, the contact system 6 is closed, whereby the control device 8 and the power semiconductor 9 are bridged. Thus, the full mains AC voltage U is applied to the electric motor 2 and this moves with the maximum speed.
  • the adjustment path between the starting position and the end position is divided into a plurality of sections, but at least two sections.
  • the division into eight sections has proven to be useful.
  • Each section is assigned a different digital code.
  • the respective digital code is generated by the setpoint device 7 as a setpoint when the actuator 4 is moved in the corresponding section.
  • This digital code is then processed by the control device 8 for the corresponding operation of the electric motor 2, wherein the electric motor 2 is driven as described so as to be operated with the functionally dependent on the setpoint speed. Since each section is associated with a digital code, these sections are formed in the manner of stages with respect to the corresponding speed.
  • This step-shaped division of the sections can be seen in more detail in Fig. 7, in which the speed n of the electric motor 2 in connection with the displacement s of the actuator 4 is shown for a specific functional relationship between the setpoint and speed.
  • the switch 1 has to receive the electrical components, such as the contact systems 5, 6 u. Like., A housing 10, as more apparent from Fig. 2.
  • the setpoint device 7 has a grinder 12 and contact surfaces 15 on the grinder 12 is attached to a arranged in the interior of the housing 10 on the plunger 11 approach 13.
  • the contact surfaces 15 are located on a printed circuit board 14.
  • the printed circuit board 14 is arranged in the housing 10, that the grinder 12 can interact with the contact surfaces 15, which can be seen in particular in the perspective view of FIG.
  • the wiper 12 now interacts electrically with the contact surfaces 15 assigned to the respective section of the adjustment path, so that the digital code can be tapped from the electrically contacted contact surfaces 15.
  • the digital code is then fed directly and directly from the setpoint device 7 to the control device 8.
  • the contact surfaces 15, in particular in the form of conductor tracks, are formed on the printed circuit board 14.
  • the contact surfaces 15 consist of side by side differently arranged and a different length owning individual contact surfaces 15a, 15b, 15c, 15d, as can be seen clearly in Fig. 4.
  • the contact surfaces 15a, 15b, 15c, 15d are provided with electrical connections 16, which serve as an output for the setpoint device 7. With the electrical terminals 16 of the output of the setpoint device 7 is then the corresponding input of the control device 8 in electrical connection.
  • the grinder 12 is movable on the contact surfaces 15 along the adjustment path in the manner of a slider track.
  • the grinder 12 has a plurality of wiper fingers 12a, 12b, 12c, 12d, so that in each case one wiper finger 12a, 12b, 12c, 12d interacts with one contact surface 15a, 15b, 15c, 15d.
  • the slider 12 bridges with the aid of its wiper fingers 12a, 12b, 12c, 12d, the contact surface 15d with one or more of the contact surfaces 15a, 15b, 15c, whereby at these contact surfaces 15a, 15b , 15c either because of the contacting the same electrical potential as at the contact surface 15d or due to the non-contacting a different electrical potential is applied.
  • the contact surfaces 15a, 15b, 15c are connected to a voltage, for example 5 volts, and the contact surface 15d is grounded.
  • the corresponding contact surface 15a, 15b, 15c is then also pulled to ground.
  • the respective electrical potential at the contact surfaces 15a, 15b, 15c thus represents a binary state according to a logical "0" or "1" (bit), so that the digital code corresponding to the adjustment path of the grinder 12 by a binary or dual code is represented, as illustrated in particular with reference to FIG. 4.
  • the binary / dual code may be a Gray code, a 3-bit Gray code according to the three pads 15a, 15b, 15c.
  • the Gray code advantageously has a high level of fail-safety and can be realized extremely space-saving with the four contact surfaces 15a, 15b, 15c, 15d on the printed circuit board 14.
  • the control device 8 is also located on the circuit board 14 in the housing 10.
  • the control device 8 is designed as an electronic and / or electrical circuit, preferably in the manner of a chip, as shown in FIG. 3.
  • the control device 8 may be an electronic digital and / or analog circuit for controlling and / or regulating the electric motor 2.
  • a microprocessor / microcontroller is suitable as a control device 8, which may expediently be a single-chip microprocessor equipped with at least three inputs for the digital code corresponding to the electrical connections 16 on the contact surfaces 15a, 15b, 15c.
  • control device 8 can control and / or regulate the rotational speed of the electric motor 2 in functional dependence on the digital code generated by the nominal value device 7.
  • Fig. 7 is an example of a curved and disproportionately running at higher speeds characteristic shown.
  • another characteristic can be selected, for example, with a substantially linear dependence between displacement s and speed n.
  • the control device 8 can control and / or regulate the rotational speed of the electric motor 2 in functional dependence on the digital code generated by the nominal value device 7.
  • Fig. 7 is an example of a curved and disproportionately running at higher speeds characteristic shown.
  • another characteristic can be selected, for example, with a substantially linear dependence between displacement s and speed n.
  • the torque of the electric motor 2 can be controlled and / or regulated alternatively or in addition to the rotational speed according to the digital code, which may be desirable, for example, in an electric screwdriver.
  • Such a switch can be used not only on an AC power operated power tool but also on a powered with DC battery tool.
  • a power semiconductor 9 a FET, MOS-FET o. The like.
  • the controller 8 operates by means of a pulse width modulation.
  • the digital code By appropriate assignment of the digital code to the frequency and / or the duty cycle of the pulse width modulation, the desired functional dependence of the rotational speed of the adjustment path is also set here.
  • such a switch can also be used in other electrical devices supplied by a voltage source, such as gardening tools, kitchen appliances or the like.
  • the setpoint device according to the invention can also be used independently, for example as a replacement for a potentiometer.

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  • Control Of Electric Motors In General (AREA)
  • Control Of Direct Current Motors (AREA)
  • Details Of Television Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Vending Machines For Individual Products (AREA)

Claims (10)

  1. Appareil électrique comprenant un dispositif à valeur de consigne (7), un organe d'actionnement (4) mobile entre une position initiale et une position finale en liaison active avec le dispositif à valeur de consigne (7) pour produire une valeur de consigne associée à la course de déplacement de l'organe d'actionnement (4), la course de déplacement entre la position initiale et la position finale étant divisée en plusieurs sections, en particulier en au moins deux sections, sous la forme de paliers, avec un code numérique différent associé à chacune des sections, et le code numérique associé à la course de déplacement de l'organe d'actionnement (4) étant généré en tant que valeur de consigne, et le dispositif à valeur de consigne (7) présentant une sortie électrique constituée de connexions électriques (16), et qui met à disposition la valeur de consigne sous forme de code numérique,
    caractérisé en ce que
    l'appareil électrique est un outil électrique comprenant un moteur électrique (2), par exemple une perceuse électrique, un marteau perforateur, une visseuse électrique ou analogue, l'outil électrique possède un dispositif de commande (8) permettant de faire fonctionner le moteur électrique (2) conformément à une caractéristique dépendant de la valeur de consigne, et le dispositif de commande (8) commande et/ou règle le régime et/ou le couple du moteur électrique (2) en fonction, selon la caractéristique correspondante, du code numérique généré par le dispositif à valeur de consigne (7).
  2. Appareil électrique selon la revendication 1,
    caractérisé en ce que
    le dispositif à valeur de consigne (7) est disposé dans un commutateur électrique (1).
  3. Appareil électrique selon la revendication 2,
    caractérisé en ce que
    la course de déplacement est divisée en huit sections, et de préférence, le code numérique est directement acheminé par le dispositif à valeur de consigne (7) vers le dispositif de commande (8).
  4. Appareil électrique selon la revendication 2 ou 3,
    caractérisé en ce que
    le dispositif à valeur de consigne (7) présente un curseur (12) et de préférence, le curseur (12) coopère par contact électrique avec des surfaces de contact (15) associées à la section respective de la course de déplacement, de sorte que le code numérique respectif puisse être collecté par les surfaces de contact (15), en particulier en fonction de leur contact électrique et de leur non-contact électrique, sous la forme d'un « 1 » ou d'un « 0 » logique.
  5. Appareil électrique selon la revendication 2, 3 ou 4,
    caractérisé en ce que
    le commutateur (1) possède un boîtier (10) et un poussoir (11) dépassant dans le boîtier (10) est fixé de préférence à l'organe d'actionnement (4), et de préférence également, un épaulement (13) pour la fixation du curseur (12) est disposé à l'intérieur du boîtier (10) au niveau du poussoir (11).
  6. Appareil électrique selon l'une des revendications 2 à 5,
    caractérisé en ce que
    les surfaces de contact (15) se trouvent sur une plaquette de circuit imprimé (14), et de préférence les surfaces de contact (15) sont conçues sous forme de pistes conductrices, en particulier dans des dispositions et/ou des longueurs différentes, et de préférence également, la plaquette de circuit imprimé (14) est disposée dans le boîtier (10) de sorte que le curseur (12) soit mobile sur les surfaces de contact (15) le long de la course de déplacement à la façon d'une trajectoire de curseur, et de préférence également, le curseur (12) présente plusieurs doigts de curseur (12a, 12b, 12c, 12d), chacun des doigts de curseur (12a, 12b, 12c, 12d) coopérant avec une surface de contact (15a, 15b, 15c, 15d).
  7. Appareil électrique selon l'une des revendications 2 à 6,
    caractérisé en ce que
    le dispositif de commande (8) est configuré sous forme de circuit électronique et/ou électrique pour la commande et/ou la régulation du moteur électrique (2), de préférence, le dispositif de commande (8) est conçu sous forme de circuit électronique numérique et/ou analogique, et de préférence également, le dispositif de commande (8) est situé sur la plaquette de circuit imprimé (14).
  8. Appareil électrique selon l'une des revendications 2 à 7,
    caractérisé en ce que
    le dispositif de commande (8) est un microprocesseur et/ou un micro-contrôleur, en particulier un microprocesseur à une seule puce, comprenant au moins trois entrées pour le code numérique, et de préférence, les entrées du dispositif de commande (8) sont en liaison électrique, en particulier au niveau d'une connexion électrique (16), avec respectivement une surface de contact (15a, 15b, 15c).
  9. Appareil électrique selon l'une des revendications 2 à 8,
    caractérisé en ce que
    le dispositif de commande (8) contient une commande par modulation de largeur d'impulsions pour un moteur électrique (2) fonctionnant avec une tension continue ou une commande par réglage de phase pour un moteur électrique (2) fonctionnant avec une tension alternative.
  10. Appareil électrique selon l'une des revendications 2 à 9,
    caractérisé en ce que
    le code numérique est un code binaire ou dual, conçu en particulier en une étape, par exemple un code Gray.
EP02776666A 2001-09-11 2002-09-10 Dispositif de réglage et de commande pour appareils électriques Expired - Lifetime EP1425770B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10144577 2001-09-11
DE10144577 2001-09-11
PCT/DE2002/003368 WO2003023802A1 (fr) 2001-09-11 2002-09-10 Commutateur electrique

Publications (2)

Publication Number Publication Date
EP1425770A1 EP1425770A1 (fr) 2004-06-09
EP1425770B1 true EP1425770B1 (fr) 2006-02-15

Family

ID=7698538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02776666A Expired - Lifetime EP1425770B1 (fr) 2001-09-11 2002-09-10 Dispositif de réglage et de commande pour appareils électriques

Country Status (4)

Country Link
EP (1) EP1425770B1 (fr)
AT (1) ATE318008T1 (fr)
DE (2) DE10241868A1 (fr)
WO (1) WO2003023802A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8988015B2 (en) 2010-04-07 2015-03-24 Black & Decker Inc. Power tool having a non-linear trigger-speed profile

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004038311A1 (de) 2003-08-08 2005-03-10 Marquardt Gmbh Elektrischer Schalter
WO2008083667A2 (fr) * 2007-01-13 2008-07-17 Marquardt Gmbh Dispositif de commande pour moteur électrique
CN101256910B (zh) * 2007-03-01 2011-05-18 苏州宝时得电动工具有限公司 电动工具开关及使用该开关的电动工具
DE102007011658B4 (de) 2007-03-09 2024-05-16 Marquardt Gmbh Elektrischer Schalter
DE102015216677A1 (de) 2015-09-01 2017-03-02 De'longhi Braun Household Gmbh Handgehaltenes elektrisch angetriebenes Haushaltsgerät mit Geschwindigkeitsauswahl
US11047528B2 (en) 2016-02-12 2021-06-29 Black & Decker Inc. Electronic braking for a power tool having a brushless motor

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Publication number Priority date Publication date Assignee Title
GB1435098A (en) * 1972-05-13 1976-05-12 Lucas Electrical Ltd Fuel supply systems for internal combustion engines
DE3040546C2 (de) * 1980-10-28 1983-04-07 Siemens AG, 1000 Berlin und 8000 München Codierschalter
GB2168862A (en) * 1984-12-19 1986-06-25 Smith Meters Ltd Commodity meters
DE4216296A1 (de) * 1992-05-16 1993-11-18 Miele & Cie Drehwahlschalter zur Anordnung auf einer Leiterplatte eines elektrischen Gerätes
US5739775A (en) * 1993-07-22 1998-04-14 Bourns, Inc. Digital input and control device
FR2722622B1 (fr) * 1994-07-18 1996-08-30 Schneider Electric Sa Declencheur electronique comportant au moins un organe de reglage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8988015B2 (en) 2010-04-07 2015-03-24 Black & Decker Inc. Power tool having a non-linear trigger-speed profile

Also Published As

Publication number Publication date
DE50205838D1 (de) 2006-04-20
DE10241868A1 (de) 2003-03-27
WO2003023802A1 (fr) 2003-03-20
ATE318008T1 (de) 2006-03-15
EP1425770A1 (fr) 2004-06-09

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