EP0144591A2 - Dispositif de commutation réglable - Google Patents

Dispositif de commutation réglable Download PDF

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Publication number
EP0144591A2
EP0144591A2 EP84111682A EP84111682A EP0144591A2 EP 0144591 A2 EP0144591 A2 EP 0144591A2 EP 84111682 A EP84111682 A EP 84111682A EP 84111682 A EP84111682 A EP 84111682A EP 0144591 A2 EP0144591 A2 EP 0144591A2
Authority
EP
European Patent Office
Prior art keywords
button
switch
stop edge
switch according
spring
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Withdrawn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
EP84111682A
Other languages
German (de)
English (en)
Other versions
EP0144591A3 (fr
Inventor
Karl-Heinz Bauer
Franz Rutterschmidt
Gerhard Spiller
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.)
Preh GmbH
Original Assignee
Preh 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 Preh GmbH filed Critical Preh GmbH
Publication of EP0144591A2 publication Critical patent/EP0144591A2/fr
Publication of EP0144591A3 publication Critical patent/EP0144591A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H9/061—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 enclosing a continuously variable impedance

Definitions

  • the invention relates to a switch with a button that can be displaced in the longitudinal direction against the force of a spring in a switch housing, at the start of which an electrical switching bridge switches and which adjusts a variable resistance depending on the stroke of the displacement distance.
  • Such switches are used in electrical hand machine tools, in particular hand drills.
  • the switching bridge of DE-OS 28 38 934 is complex. Because in addition to the spring resetting the button, it needs its own tension spring. In addition, their mating contact must be connected to the relevant terminal via an electrical connection.
  • a disadvantage of the switch according to DE-OS 28 38 934 is also that there is no possibility for the user to preset the resistance value and thus the speed at a drilling machine, which is to be achieved at the maximum when a key is pressed.
  • the user desires such a presetting, for example when he is working on a material on which a certain working speed of the machine should not be exceeded.
  • EP-FS 00 11 440 describes a switch in which a rotary knob is arranged on the key, by means of which it can be determined how far the key should be able to be pressed.
  • Such a rotary knob on the front of the button can only be operated practically by switching off the machine and bringing it out of its working position.
  • the rotary knob becomes annoying for the user if, as is necessary for most work processes, he has to hold the button down for a long time.
  • the object of the invention is to construct a switch of the type mentioned in such a way that the end stop of the key can be set without a rotary knob and without impairing the function of the switching bridge.
  • the above object is achieved in a switch of the type mentioned at the outset in that a transversely displaceable slide is mounted on the button, which has a stop edge protruding in the longitudinal direction, and that a stop edge is provided on the switch housing which faces the stop edge, and that the distance of the stop edge from the stop edge seen in the longitudinal direction is greater in a sliding position of the slide than in another sliding position.
  • the possible stroke of the button can be adjusted by moving the slide in the transverse direction.
  • the slide is easy to operate. On the other hand, it does not interfere when the button is pressed.
  • the slide is preferably arranged on a side surface of the key. This keeps the button face smooth.
  • the key has a row of teeth extending in the longitudinal direction, in which a pinion engages.
  • a grinder is attached to the pinion in a rotationally fixed manner and is assigned to an arc-shaped resistance track.
  • a push button is arranged on the axis of the pinion, which has a toothing on its circumference that opposes a toothing of the switch housing.
  • the teeth interlock under the action of the spring that resets the button. If the button is pressed in any position, the teeth mesh. As a result, the pinion can no longer be rotated.
  • the button is released, the row of teeth press under the action the spring on the pinion, causing the teeth to get caught. It is favorable that the key can be locked in any position regardless of the setting of the slide.
  • the spring that resets the button not only takes over the reset function, but also serves, as described, to lock the button.
  • the spring also operates the switching bridge.
  • the spring of the button is supported opposite at a first end of the switching bridge.
  • a cam is arranged on the button, which holds the switching bridge in its one position against the force of this spring. When the button begins to be displaced, the cam releases the switching bridge, which folds into its other switching position under the force of the spring. There is no need for an additional spring of its own for pivoting the bridge.
  • a button 2 is mounted in a switch housing 1 and is displaceable in the longitudinal direction L.
  • the button head 3 has a smooth, uninterrupted end face 4 and a similar side face 5 '.
  • a recess 7 is provided on the side surface 6 opposite this. This extends in the direction Q transversely to the longitudinal direction L, parallel to the end face 4.
  • a slide 8 is slidably guided, which has an operating plate 9, which is flush with the side surface 6 and is corrugated on its surface.
  • an operating plate 9 which is flush with the side surface 6 and is corrugated on its surface.
  • a slide body 10 is connected, which lies in the interior of the key head 3 and has a stop edge 11 protruding in the longitudinal direction L.
  • Resilient tongues 12 are formed on the slide body 10, which latch in grooves 13 which are provided on the inside of the end face 4.
  • a stepped stop edge 14 is formed on the housing 1 and faces the stop edge 11.
  • the distance between the stop edge 11 and the stop edge 14 assumes its minimum value Amin.
  • the distance increases between the stop edge 11 and the stop edge 14 at its maximum value Amax. The distance changes gradually between these two limit values.
  • the key 2 has a key body 15 which is guided in the switch housing 1.
  • the key body 15 has an opening 16 which is provided on one side with a row of teeth 17 which extends in the longitudinal direction L.
  • a cavity 18 is provided, in which a compression spring 19 is mounted.
  • a cam 20 is formed on the key body 15.
  • a pinion 21 engages in the tooth row 17.
  • a grinder carrier 22 is arranged in a rotationally fixed manner, which carries grinder fingers 23, 24.
  • a circuit board 25 (cf. FIG. 3) is assigned to these.
  • An inner guide ring 26 is printed on the circuit board 25.
  • the grinder finger 23 stands on this.
  • Around the inner guide ring 26 there is a resistance track 27 in the form of a circular arc, which ends in guide linings 28 and 29.
  • the inner guide ring 26 ends in a guide lining 30.
  • the wiper fingers 24 stand on the resistance track 27 or the guide linings 28 and 29.
  • the guide pads 28, 29 and 30 are connected to terminal lugs 31, 32 and 33.
  • the compression spring 19 stands on a switching bridge 39.
  • the switching bridge 39 is provided with a frustoconical extension 40.
  • a bend 41 is formed, which lies in a groove 42 of a connecting lug 43.
  • the switching bridge 39 has a step 44 with the edge of which it stands loosely on the cam 20 in one switching position.
  • a contact surface 45 is formed at the other end of the switching bridge 39.
  • the clamping piece 46 has a threaded bore 48 into which a screw (not shown in more detail) for tightening a connecting wire 49 is to be screwed.
  • the connecting lug 43 and the connecting wire 49 lie on the electric motor of the drilling machine or the mains connection.
  • the open switching position of the switching bridge 39 is shown with solid lines.
  • the closed switch position is shown in dashed lines.
  • the switch for the electric motor consists of only three parts, namely the connecting lug 43, the switching bridge 39 and the clamping piece 46.
  • a speed control device of the drilling machine is connected to the connecting lugs 31, 32 and 33.
  • the key top 3 can only be displaced by part of its maximum travel (amax). If the button head 3 is pressed as far as this stop, then the row of teeth 17 rotates the pinion 21 and thus the wiper fingers 24 only to such an extent that a fraction of the maximum speed can be reached. The user can therefore set a minimum speed in advance and still press the button head 3 as far as it will go.
  • the control panel 9 of the slide 8 with the thumb of the right hand, the index finger of which presses on the end face 4, in the direction of the arrow Q advance.
  • the distance between the stop edge 11 and the stepped stop edge 14 becomes larger, so that it continues to rotate the pinion 21 and thus the grinder fingers 24 until it strikes again, which increases the speed of the machine.
  • the number of grooves 13 provided for one of the resilient tongues is equal to the number of steps of the stepped abutment edge 14.
  • the stepping of the stop edge 14 is designed so that the user can only increase the speed by moving the slide 8 while the machine is running. To select a lower speed, the button head 3 must be released.
  • the stroke difference between the stop positions Amin and Amax need not be large. Nevertheless, a large adjustment range of the rotational speeds is ensured because the path which the wiper fingers 24 move the slide 8 from the position Amin to the position Amax is substantially greater than the stroke difference between the position Amin and Amax.
  • the toothings 37 and 38 have at least as many teeth as there are steps on the stop edge 14. This ensures speed fixation in the same level of precision as if the button 3 is pressed all the way to the stop.
  • the pinion 21 is also displaced when the push button 35 is pressed. During this displacement, the toothing of the pinion 21 remains in engagement with the row of teeth 17.
  • the grinder carrier 22 does not move because it engages with the corresponding teeth in the toothing of the pinion 21. This coupling of the displacement of the push button 35 and the pinion 21 does not interfere, but can be avoided by suitable means.
  • the push button 35 rotates with the pinion 21.
  • the push button 35 rotates counter-clockwise when the button head 3 is pressed. If the row of teeth 17 is placed upwards, the push button 35 rotates clockwise when the button head 3 is pressed.
  • a marking (not shown in detail) is preferably arranged on the circumference of the push button 35 and a corresponding scale, for example from “0” to “6”, is provided on the circumference of an opening in the machine housing through which the push button 35 protrudes. The turning of the push button 35 is thereby used to display the respective speed. The user can estimate the rotational speed reached at the position of the marking of the push button 35.
  • Another similar scale can be provided for the stepped stop edge 14. This makes it easier for the user to preselect a desired speed by adjusting the slide body 10. Such a scale can also be formed on the button head 3 next to the slide 8.
  • the switch described is largely dustproof.
  • the spring 36 is preferably extrusion-coated with a plastic cover made of a soft plastic.
  • the stop edge 14 does not necessarily have to be stepped. It can also have a continuous course.
  • the variable distance between the stop edge 11 and the stop edge 14 can also be achieved in that a stepped or continuously falling stop surface is provided on the slide 8 and a fixed stop point is formed on the switch housing 1.
  • the arrangement of the switching bridge 39 described can also be used with switches other than the one described.

Landscapes

  • Push-Button Switches (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Adjustable Resistors (AREA)
EP84111682A 1983-11-24 1984-09-29 Dispositif de commutation réglable Withdrawn EP0144591A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833342474 DE3342474A1 (de) 1983-11-24 1983-11-24 Schalter
DE3342474 1983-11-24

Publications (2)

Publication Number Publication Date
EP0144591A2 true EP0144591A2 (fr) 1985-06-19
EP0144591A3 EP0144591A3 (fr) 1986-09-17

Family

ID=6215137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111682A Withdrawn EP0144591A3 (fr) 1983-11-24 1984-09-29 Dispositif de commutation réglable

Country Status (3)

Country Link
US (1) US4660019A (fr)
EP (1) EP0144591A3 (fr)
DE (1) DE3342474A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0342327A1 (fr) * 1988-05-10 1989-11-23 KAUTT & BUX KG Interrupteur d'appareil

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157186B1 (fr) * 1984-04-03 1990-01-10 Preh-Werke GmbH & Co. KG Commutateur à curseur verrouillable
JPS63170903U (fr) * 1987-04-28 1988-11-07
US4968922A (en) * 1988-04-15 1990-11-06 Lucerne Products, Inc. Reversing switch
DE4410312C2 (de) * 1994-03-25 2000-01-13 Bosch Gmbh Robert Elektrische Handwerkzeugmaschine mit Potentiometer und Verfahren zum Einstellen des Potentiometers
DE102004027644A1 (de) * 2004-06-05 2006-06-08 Robert Bosch Gmbh Bedienvorrichtung eines Elektrowerkzeugs
JP4696670B2 (ja) * 2005-05-02 2011-06-08 オムロン株式会社 トリガスイッチ
NL1030893C2 (nl) * 2006-01-11 2007-07-12 Electrische App Nfabriek Capax Schakelaar met slagbeperking voor een elektrisch handgereedschap.
US9246487B2 (en) 2008-12-16 2016-01-26 Dell Products Lp Keyboard with user configurable granularity scales for pressure sensitive keys
US9321112B2 (en) 2011-05-18 2016-04-26 Black & Decker Inc. Power saw tool
US9368300B2 (en) 2013-08-29 2016-06-14 Dell Products Lp Systems and methods for lighting spring loaded mechanical key switches
US9343248B2 (en) * 2013-08-29 2016-05-17 Dell Products Lp Systems and methods for implementing spring loaded mechanical key switches with variable displacement sensing
US9559628B2 (en) 2013-10-25 2017-01-31 Black & Decker Inc. Handheld power tool with compact AC switch
DE102018113100A1 (de) * 2018-06-01 2019-12-05 Elrad International D.O.O. Schalter für ein Elektrogerät
US12002645B2 (en) * 2019-01-08 2024-06-04 Shenzhen Topband Co., Ltd. Electronic device, PCB and electric tool
CN112057091B (zh) * 2020-08-18 2021-08-03 北京唯迈医疗设备有限公司 一种调速手闸机构及其调速方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE689194C (de) * 1938-05-15 1940-03-13 Stotz Kontakt Gmbh Installationsdrehschalter
US3439248A (en) * 1966-01-04 1969-04-15 Singer Co Trigger-actuated motor speed control and switching device having multiple selective positions for setting motor speeds
US3548136A (en) * 1968-05-29 1970-12-15 Skil Corp Trigger actuated switch device with adjustment means for establishing a plurality of predetermined trigger positions
US3713070A (en) * 1971-05-03 1973-01-23 Lucerne Products Inc Rotary actuator for a switch
DE2838934A1 (de) * 1978-09-07 1980-03-27 Marquardt J & J Elektrischer schalter
DE3039614A1 (de) * 1980-10-21 1982-05-19 Brown, Boveri & Cie Ag, 6800 Mannheim Schiebeschalter
DE3114794A1 (de) * 1981-04-11 1982-10-28 Merit-Werk Merten & Co Kg, 5270 Gummersbach Schalter mit drehwiderstand oder rheostat zum regeln elektrischer verbraucher fuer kraftfahrzeuge

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2012748B1 (de) * 1970-03-18 1971-08-12 Fa Heinrich Kopp Elektrischer Drucktaster mit thermi scher Uberstromauslosung
US3842328A (en) * 1972-03-01 1974-10-15 Skil Corp Speed control device with independent speed control and on-off operating members
US3927276A (en) * 1974-05-03 1975-12-16 Mallory & Co Inc P R Switch assembly with limit stop structure allowing alternate make and break operational switch states
US4137490A (en) * 1977-11-08 1979-01-30 Cutler-Hammer, Inc. Trigger speed control switch
US4241297A (en) * 1978-11-20 1980-12-23 Eaton Corporation Double-pole trigger speed control switch
DE3121033C2 (de) * 1981-05-27 1986-06-26 Marquardt Gmbh, 7201 Rietheim-Weilheim Elektrischer Schalter und Verfahren zur Montage des Schalters

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE689194C (de) * 1938-05-15 1940-03-13 Stotz Kontakt Gmbh Installationsdrehschalter
US3439248A (en) * 1966-01-04 1969-04-15 Singer Co Trigger-actuated motor speed control and switching device having multiple selective positions for setting motor speeds
US3548136A (en) * 1968-05-29 1970-12-15 Skil Corp Trigger actuated switch device with adjustment means for establishing a plurality of predetermined trigger positions
US3713070A (en) * 1971-05-03 1973-01-23 Lucerne Products Inc Rotary actuator for a switch
DE2838934A1 (de) * 1978-09-07 1980-03-27 Marquardt J & J Elektrischer schalter
DE3039614A1 (de) * 1980-10-21 1982-05-19 Brown, Boveri & Cie Ag, 6800 Mannheim Schiebeschalter
DE3114794A1 (de) * 1981-04-11 1982-10-28 Merit-Werk Merten & Co Kg, 5270 Gummersbach Schalter mit drehwiderstand oder rheostat zum regeln elektrischer verbraucher fuer kraftfahrzeuge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0342327A1 (fr) * 1988-05-10 1989-11-23 KAUTT & BUX KG Interrupteur d'appareil

Also Published As

Publication number Publication date
DE3342474A1 (de) 1985-06-13
EP0144591A3 (fr) 1986-09-17
US4660019A (en) 1987-04-21
DE3342474C2 (fr) 1987-10-01

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