EP0338420B1 - Doppelpotentiometer-Kombination - Google Patents

Doppelpotentiometer-Kombination Download PDF

Info

Publication number
EP0338420B1
EP0338420B1 EP89106587A EP89106587A EP0338420B1 EP 0338420 B1 EP0338420 B1 EP 0338420B1 EP 89106587 A EP89106587 A EP 89106587A EP 89106587 A EP89106587 A EP 89106587A EP 0338420 B1 EP0338420 B1 EP 0338420B1
Authority
EP
European Patent Office
Prior art keywords
potentiometer
potentiometers
adjusting
housing
double rotary
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
EP89106587A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0338420A3 (en
EP0338420A2 (de
Inventor
Martin Lohner
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.)
Bsg-Schalttechnik & Co KG GmbH
Original Assignee
Bsg-Schalttechnik & Co KG 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 Bsg-Schalttechnik & Co KG GmbH filed Critical Bsg-Schalttechnik & Co KG GmbH
Publication of EP0338420A2 publication Critical patent/EP0338420A2/de
Publication of EP0338420A3 publication Critical patent/EP0338420A3/de
Application granted granted Critical
Publication of EP0338420B1 publication Critical patent/EP0338420B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/16—Adjustable resistors including plural resistive elements
    • H01C10/20—Contact structure or movable resistive elements being ganged

Definitions

  • the invention is based on a double rotary potentiometer combination according to the preamble of claim 1.
  • Such double rotary potentiometer devices in which two potentiometers, also arranged in their own individual housings, are arranged side by side or one above the other and their housings are connected to one another by catches or screw connections, so that the setting axis of one potentiometer then the adjusting shaft of the other potentiometer, which is designed as a hollow shaft enforced, are known in many forms (US-PS 36 76 822).
  • the double potentiometer device constitutes a unitary unit on the outside, but is composed of disks in the form of individual, successive flanges, which are held together by screw connections extending axially along the entire length.
  • a division into respective individual potentiometers is not possible because when the through screw connections are removed, the individual flange disks fall apart and, for example, rear flanges of one of the potentiometer components simultaneously form front or cover flanges for the adjacent potentiometer component.
  • the electrical connections that is to say the two ends of the resistance track and the collector connection, are each led out sideways at the point where the respective individual components of the double potentiometer connected to these electrical connections are located.
  • a specific exemplary embodiment specified below relates to a speed control and setting module for electric drive machines, for example hand drills, saws, grinding devices or the like.
  • a setting potentiometer which is adjustable from the outside via a setting wheel or another actuating element (continuously) is usually provided and can be set to specific values depending on the desired performance requirements and speeds.
  • a calibration potentiometer for example in order to adapt the module to the respective controlled device and its driving electric motor or for other reasons, for example to carry out a temperature comparison and the like.
  • the present invention preferably relates to such an application, but, as is understood, is not limited to this.
  • Such modules are then on a common circuit board or at separate locations Several potentiometers are provided, some of which are used for adjustment or adjustment, some of which are also to be made by the later user after final assembly of the device, for example a speed setting (as setpoint).
  • the invention is therefore based on the object of designing a double potentiometer device for attachment to a circuit board which, with a space-saving construction, allows good access to both potentiometers, so that, for example, subsequent adjustments in addition to the settings of a specific machine variable which are to be carried out continuously are also carried out in the fully assembled device can be.
  • the invention solves this problem with the characterizing features of the main claim and has the particular advantage that two mutually independent, if desired, completely independent potentiometers - and preferably with their own small housings - are arranged and designed within a common overarching potentiometer pot housing so that the settings or Adjustments can be made to both potentiometers via a hollow axis, through which both potentiometers can be reached simultaneously. It is therefore possible, on the one hand, to carry out the required adjustment and adjustment more quickly, and there is also a significantly lower requirement for available installation space, since the height of the potentiometer combination is greater; an expansion in height is, however, much less critical than if the space for another potentiometer is additionally required on the circuit board.
  • a particular advantage of the present invention lies in the fact that even in the fully assembled device, in which only the axis for the setting potentiometer of the desired machine variable (speed) is normally accessible from the outside, this is also usually the case then, seen from this direction, the adjustment potentiometer lying below the adjustment potentiometer is still accessible, so that fine adjustments can subsequently be made or also adjusted on the belt. Additional openings in the housing of the respective device are unnecessary.
  • the adjusting wheel provided for the setting potentiometer which can also be actuated from the outside on the external device, can be snapped on at a later stage, or a fixedly mounted adjusting wheel with a continuous, hollow shaft that can accommodate an adjusting actuating element, which makes it possible to by this adjusting wheel to adjust the underlying adjustment or adjustment potentiometer.
  • the opening in the adjusting wheel connected to the hollow shaft can then be closed by a blind plug or by some potting compound.
  • the basic idea is to insert two potentiometers stacked on top of each other in a common pot-shaped housing arranged on a circuit board, which can be self-closed potentiometer modules with their own housing and provide a hollow shaft through which both potentiometers can be reached simultaneously.
  • This makes it possible to adjust both the inner or lower first potentiometer, which is preferably in the form of a balancing potentiometer, and the second potentiometer arranged above it, for example permanent adjustment in the sense of adjusting an outer machine variable, from the area of an outer adjusting wheel.
  • a circuit board or circuit board with 10 and a seated on it common housing for the two potentiometers in the form of a pot housing is designated 11.
  • the common housing 11 has receiving spaces for a first potentiometer 12, which is referred to in the following as a differentiation potentiometer. and for a second potentiometer 13, which in hereinafter referred to as the potentiometer.
  • a first potentiometer 12 which is referred to in the following as a differentiation potentiometer.
  • a second potentiometer 13 which in hereinafter referred to as the potentiometer.
  • the invention is not restricted to these special designations and any functions can be assigned to the respective potentiometers; the only important thing is that both potentiometers 12 and 13 are stacked one above the other in a common housing so that they can be rotated so that they can be reached simultaneously through a hollow axis. This will be discussed further below.
  • the adjustment potentiometer is significantly smaller in its dimensions, i.e. circumference and / or height, than the adjustment potentiometer, which also makes sense since the adjustment potentiometer is operated only rarely or once, the common housing 11 adjoins a smaller receiving space 11a its bottom, which can be limited by ring walls or at least wall parts 14.
  • the adjustment potentiometer is then arranged above the ring wall 14 and seated on it, the respective potentiometer connections being led through corresponding bores or passage openings, not shown in the pot bottom of the common housing 11, through to the circuit board 10 and there preferably on the rear 10a (line side) ), as indicated at 15, are soldered. These soldering points can simultaneously be electrical contact connections with conductors running on the conductor track side 10a.
  • these spaces can either have an inner contour corresponding to the outer contour of the actual potentiometer housing - as FIG. 2 shows, the shape of the potentiometer housing is not circular, but instead there is a rectangular projecting edge 16 in the area of the potentiometer connection contacts, over which the potentiometers rotate have them stored in their recording rooms.
  • ribs 17 can protrude inward from the inner wall of each receiving space, which abut indentations and the peripheral edge 16 of the potentiometer housing and secure it against rotation.
  • FIG. 1 shows that the mounting of the two potentiometers 12, 13 in the pot-pot forming the common housing 11 is made in such a way that their adjustment axes lie exactly one above the other, whereby the upper potentiometer 13, through which the actuation of the lower potentiometer 12 must also take place, has a continuous hollow axis 18 which, as shown in FIG. 2, forms a non-circular cross-sectional shape, so that a correspondingly shaped one is used for the rotary actuation and adjustment of this upper adjustment potentiometer 13 Hollow shaft 25, which can be connected to a setting wheel 24, which is placed from the outside (this will be discussed further below).
  • the hollow shaft 18 forms a continuous bore through the housing of the potentiometer 13, so that the adjustment or actuation opening 19 of the adjustment potentiometer located below it can also be reached. It is therefore possible in a first embodiment to insert an actuating element 20 (which can be removed again later) with respect to this hollow axis 18 through the hollow axis 18 of the potentiometer 13 and to insert it into the adjusting opening 19 of the potentiometer 12 for adjustment or adjustment.
  • this adjusting opening 19 also has a special cross-sectional configuration, in the exemplary embodiment shown a cross-slot opening, so that the end of the actuating element 20 has, for example, a cross-slot shape or a screwdriver shape for the rotationally fixed insertion into the adjusting opening.
  • Control or regulating module which is built on the circuit board 10 (not shown) and includes the two potentiometers 12 and 13 as further electrical components, to be installed in a third-party device, for example a hand drill, saw, stationary machine or the like, its control or Regulation should be carried out by this block.
  • a portion of the outer housing structure of this device is designated 21.
  • the assembly can be carried out, for example, in such a way that the outer housing has an inwardly projecting ring wall 22, which sealingly comes into operative connection with a circumferential housing lug 23 of the common housing 11, so that this seal connects to the housing and further fastening means, not shown in the drawing also secure storage and guidance of the electrical / electronic component as it is built up on the circuit board 10 and specifically here of the common housing 11.
  • the outer adjusting wheel 24 can then be provided in the basic structure shown in dash-dotted lines in FIG. 1 for actuating the setting potentiometer.
  • the adjusting wheel 24 has a ring collar 24b which extends from a bottom 24a and has a central hollow shaft 25 which, in particular if an adjustment, that is to say a rotation of the adjustment potentiometer is still desired after mounting the adjusting wheel 24, is itself designed as a hollow shaft and therefore the hollow axis 18 of the upper adjustment potentiometer 13 is completed and completed insofar as it is possible to pass the actuating element 20 through this hollow shaft 25, as also shown in FIG. 1, up to the engagement position with the adjusting opening 19 of the lower adjustment potentiometer.
  • this can also have an inner annular collar structure 26 which is inserted into a latching and bearing opening 27 of an external external housing 21, which also projects outwardly, and is locked with the latter by an outwardly projecting ring nose structure 26a.
  • FIG. 1 shows that when the actuating hollow shaft 25 of the setting wheel 24 is designed as being hollow throughout the adjustment can also be carried out with the adjusting wheel permanently attached, in which case the hollow shaft then forms a continuous opening for adjustment, which, if desired, can also be closed by a blind plug after the final adjustment has been carried out.
  • pot shape of the common housing can optionally be enclosed or filled with potting compound.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adjustable Resistors (AREA)
  • Cookers (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
EP89106587A 1988-04-16 1989-04-13 Doppelpotentiometer-Kombination Expired - Lifetime EP0338420B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812791A DE3812791A1 (de) 1988-04-16 1988-04-16 Auf einer schaltungsplatte befestigte potentiometerkombination
DE3812791 1988-04-16

Publications (3)

Publication Number Publication Date
EP0338420A2 EP0338420A2 (de) 1989-10-25
EP0338420A3 EP0338420A3 (en) 1990-05-09
EP0338420B1 true EP0338420B1 (de) 1994-08-17

Family

ID=6352185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106587A Expired - Lifetime EP0338420B1 (de) 1988-04-16 1989-04-13 Doppelpotentiometer-Kombination

Country Status (4)

Country Link
US (1) US4973939A (https=)
EP (1) EP0338420B1 (https=)
AT (1) ATE110186T1 (https=)
DE (2) DE3812791A1 (https=)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9113578U1 (de) 1991-10-31 1993-03-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Staubsauger mit einem Drehknopf
DE102008041366A1 (de) * 2008-08-20 2010-02-25 Robert Bosch Gmbh Elektronikmodul
DE102009026886A1 (de) * 2009-06-10 2010-12-16 Robert Bosch Gmbh Formteil zur Aufnahme mehrerer elektrischer Bauteile
JP5794682B2 (ja) * 2011-06-30 2015-10-14 株式会社共和電業 制御系におけるポテンショメータ装置
US10777341B2 (en) 2018-07-25 2020-09-15 Denso International America, Inc. Potentiometer toggle switch

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB567017A (en) * 1942-11-12 1945-01-24 Plessy Company Ltd Variable resistance devices
US2669634A (en) * 1953-01-08 1954-02-16 Chicago Telephone Supply Corp Preset electrical control instrumentality with plug-in shaft
DE1971610U (de) * 1967-08-18 1967-11-02 Wilhelm Ruf O H G Elektrotechn Mehrfach-drehwiderstand.
US3597717A (en) * 1969-11-24 1971-08-03 Harry William Kent Dual potentiometer
US3676822A (en) * 1971-04-08 1972-07-11 Allen Bradley Co Modular potentiometer
JPS4831449A (https=) * 1971-08-28 1973-04-25
US4223294A (en) * 1978-10-16 1980-09-16 Allen-Bradley Company Vernier control
DE8015397U1 (de) * 1980-06-10 1981-11-19 Siemens AG, 1000 Berlin und 8000 München Doppel-potentiometer
DE3223641A1 (de) * 1982-06-24 1983-12-29 Bsg Schalttechnik Gmbh & Co Kg, 7460 Balingen Potentiometer/schalter-kombination
US4649366A (en) * 1985-10-04 1987-03-10 Resistance Technology, Inc. Trimmer control mounted in potentiometer knob
DE8529302U1 (de) * 1985-10-15 1985-12-05 Siemens AG, 1000 Berlin und 8000 München Mehrfach-Potentiometer
DE8805076U1 (de) * 1988-04-16 1988-06-30 Bsg-Schalttechnik Gmbh & Co Kg, 72336 Balingen Auf einer Schaltungsplatte befestigte Potentiometerkombination

Also Published As

Publication number Publication date
US4973939A (en) 1990-11-27
ATE110186T1 (de) 1994-09-15
EP0338420A3 (en) 1990-05-09
DE3812791C2 (https=) 1993-02-18
DE58908201D1 (de) 1994-09-22
DE3812791A1 (de) 1989-10-26
EP0338420A2 (de) 1989-10-25

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