EP0259821A2 - Rotary variable resistor - Google Patents

Rotary variable resistor Download PDF

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Publication number
EP0259821A2
EP0259821A2 EP87113071A EP87113071A EP0259821A2 EP 0259821 A2 EP0259821 A2 EP 0259821A2 EP 87113071 A EP87113071 A EP 87113071A EP 87113071 A EP87113071 A EP 87113071A EP 0259821 A2 EP0259821 A2 EP 0259821A2
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EP
European Patent Office
Prior art keywords
base body
screw
rotary
rotation
axis
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Granted
Application number
EP87113071A
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German (de)
French (fr)
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EP0259821A3 (en
EP0259821B1 (en
Inventor
Gerhard Spiller
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Preh GmbH
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Preh GmbH
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Publication of EP0259821A3 publication Critical patent/EP0259821A3/en
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Publication of EP0259821B1 publication Critical patent/EP0259821B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/14—Adjustable resistors adjustable by auxiliary driving means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path

Definitions

  • the invention relates to a rotary resistor, in which a rotary body is rotatably mounted on a base body carrying a resistance track, which is axially clamped to produce a frictional torque when rotating with the base body and to which a tapping element resting on the resistance track is fastened.
  • DE-GM 78 15 934 describes a rotational resistance of the above type. Its arrangement is dimensioned extremely small in accordance with its typical use as a volume control in hearing aids.
  • the rotating body With such a resistance, the rotating body is axially clamped to the base body by riveting or flanging.
  • the resulting friction torque when turning the rotating body is not adjustable within narrow limits, but more or less a random result.
  • the resistance path is in the form of an annular surface extending radially to the axis of rotation in the base body.
  • the resilient tapping element is kept pressed onto the resistance track by the riveting or flanging.
  • the axial bracing of the rotating body with the base body and the pressing force of the tapping member are inextricably linked. An increase in the axial clamping force is thus associated with a corresponding increase in the pressing force of the tapping member; the same applies in the reverse case.
  • a threaded pin is attached to the base body, with which the rotary resistor can be fixed to a base plate.
  • the threaded pin can also serve as an electrical connection.
  • the rotating part is axially clamped with respect to the base body with a pin and a snap ring.
  • the friction torque achieved depends on various uncertainty factors, so that it can hardly be determined exactly.
  • the object of the invention is to propose a rotational resistance of the type mentioned at the outset, in which a frictional torque occurring when the rotating body is rotated, even with small dimensions of the rotational resistance, is easily adjustable and adjustable.
  • the above object is achieved in the case of a rotational resistance of the type mentioned at the outset in that a screw which is coaxial with the axis of rotation is provided for axially bracing the rotating body, the shaft of which is screwed to the basic body and the head of which is on the Rotating body presses.
  • the force with which the rotating body is pressed onto the base body can be adjusted by tightening the screw to a greater or lesser extent.
  • the frictional torque that occurs when the base body is rotated can thereby be set precisely. It is also advantageous that if the frictional torque is initially set too high, this can be reduced by loosening the screw slightly.
  • the resistance track extends coaxially around the axis of rotation and the tap member presses on the resistance track in the radial direction of the axis of rotation.
  • the pressing force of the tap member thus acts transversely to the force with which the rotating body is pressed onto the base body. This ensures that the forces are independent of one another. It is thus possible to achieve a high frictional torque without the pressing force of the tapping element on the resistance track also becoming correspondingly high.
  • a rotary resistor (1) has a plastic base body (2) in which a cylindrical interior (3) is formed.
  • a resistance track (5) runs around the inside of the cylindrical wall (4) of the interior (3). Both ends of which are connected to connecting pins (6, 7) around which the base body (2) is injection molded.
  • a metallic sleeve (8) is attached to the base body (2) concentrically with the wall (4). This can be fastened to the base body (2) by injecting the plastic compound forming it around the sleeve (8) during its manufacture.
  • the sleeve (8) has an internal thread (9). In this the shaft (10) of a screw (11) is screwed, the head of which is designated (12).
  • a rotary body (13) is mounted on the base body (2) about an axis of rotation (14) coinciding with the axis of the screw (11).
  • the rotating body (13) has a base (15) with an opening (16) for the screw (11) and an annular rim (17).
  • a plurality of projections (18) for actuating the rotating body (13) are formed on the outside of the ring edge (17).
  • a cover (19) covering the screw head (12) is snapped onto the rotating body (13).
  • the ring edge (17) overlaps the wall (4). It is guided radially to the axis of rotation (14) by a step (20) rotating around it. With its end face (21), the ring edge (17) lies against an annular surface (22) of the base body (2).
  • a holder (23) for a tap member (24) is formed on the base (15).
  • the tap member (24) rests with its one end (25) radially resiliently on the resistance track (5). With its other end (26) it also rests radially resiliently on the sleeve (8).
  • the desired friction torque when turning the rotating body (13) is set as follows:
  • the screw (11) After placing the rotating body (13) on the base body (2), the screw (11) is screwed into the sleeve (8) until its head (12) presses on the floor (15). The screw (11) is then tightened so that the end face (21) of the ring edge (17) presses so strongly on the ring surface (22) of the base body (2) as is necessary for the actuating torque required for rotating the rotating body (13) is.
  • the pressing force of the ends (25, 26) of the tapping member (24) on the resistance track (5) or the sleeve (8) does not change.
  • the shaft (10) of the screw (11) projects beyond the base body (2) with a section (27) (cf. FIGS. 1 and 3).
  • a pin (28) is formed on the base body (2) in addition to the section (27) to prevent rotation.
  • the resistor (1) with the section (27) and the pin (28) is inserted into a corresponding recess in a base plate (29).
  • the section (27) extends through the base plate (29), so that the rotary resistor (1) is screwed onto the section (27) by means of a nut (30) on the base plate (29).
  • an electrical guide surface (31) or another electrical connection is provided on the base plate (29).
  • an electrical connection is made to the tap (24) by means of the nut (30) via the screw (11), the metallic sleeve (8) and the end (26).
  • the screw (11) fulfills several functions. It holds the rotating body (13) on the base body (2). It ensures the necessary contact pressure between the end face (21) and the ring face (22). It serves to mechanically hold the rotary resistor (1) on the base plate (29) and it forms the electrical connection of the tapping element (24).

Abstract

Bei einem Drehwiderstand soll das beim Drehen auftretende Reibmoment einfach justierbar sein. Es ist hierfür zur axialen Verspannung eines Drehkörpers (13) mit einem Grundkörper (2) eine Schraube (11) vorge­sehen. Eine im Grundkörper (2) umlaufende Widerstandsbahn (5) wird in zur Drehachse (14) radialer Richtung von einem Abgriffsglied (24) kon­taktiert. Die Schraube (11) kann zugleich der Befestigung des Drehwider­standes (1) und dem elektrischen Anschluß des Abgriffsgliedes (24) dienen.

Figure imgaf001
In the case of a rotational resistance, the frictional torque that occurs during turning should be easily adjustable. For the axial bracing of a rotating body (13) with a base body (2), a screw (11) is provided. A resistance track (5) running around in the base body (2) is contacted by a tapping element (24) in the radial direction of the axis of rotation (14). The screw (11) can also be used to attach the rotary resistor (1) and the electrical connection of the tap member (24).
Figure imgaf001

Description

Die Erfindung betrifft einen Drehwiderstand, bei dem an einem eine Widerstandsbahn tragenden Grundkörper ein Drehkörper drehbar gelagert ist, der zur Erzeugung eines Reibmoments beim Drehen mit dem Grundkörper axial verspannt ist und an dem ein auf der Widerstandsbahn aufliegendes Abgriffsglied befestigt ist.The invention relates to a rotary resistor, in which a rotary body is rotatably mounted on a base body carrying a resistance track, which is axially clamped to produce a frictional torque when rotating with the base body and to which a tapping element resting on the resistance track is fastened.

Einen Drehwiderstand der vorstehenden Gattung beschreibt das DE-GM 78 15 934. Seine Anordnung ist gemäß seiner typischen Verwendung als Lautstärkesteller in Hörhilfen äußerst klein dimensioniert.DE-GM 78 15 934 describes a rotational resistance of the above type. Its arrangement is dimensioned extremely small in accordance with its typical use as a volume control in hearing aids.

Bei einem derartigen Drehwiderstand ist der Drehkörper axial durch eine Nietung bzw. Bördelung mit dem Grundkörper verspannt. Das dadurch beim Drehen des Drehkörpers auftretende Reibmoment ist nicht in engen Grenzen einstellbar, sondern mehr oder weniger ein Zufallsergebnis. Bei dem be­kannten Drehwiderstand liegt die Widerstandsbahn als kreisringförmige, sich radial zur Drehachse erstreckende Fläche im Grundkörper. Das federnde Abgriffsglied wird durch die Nietung bzw. Bördelung auf die Widerstandsbahn gedrückt gehalten. Dadurch stehen die axiale Verspan­nung des Drehkörpers mit dem Grundkörper und die Andruckkraft des Ab­griffsglieds in einem unlösbaren Zusammenhang. Eine Erhöhung der axialen Spannkraft ist damit mit einer entsprechenden Erhöhung der Andruckkraft des Abgriffsgliedes verbunden; entsprechendes gilt im umgekehrten Fall.With such a resistance, the rotating body is axially clamped to the base body by riveting or flanging. The resulting friction torque when turning the rotating body is not adjustable within narrow limits, but more or less a random result. In the known rotary resistor, the resistance path is in the form of an annular surface extending radially to the axis of rotation in the base body. The resilient tapping element is kept pressed onto the resistance track by the riveting or flanging. As a result, the axial bracing of the rotating body with the base body and the pressing force of the tapping member are inextricably linked. An increase in the axial clamping force is thus associated with a corresponding increase in the pressing force of the tapping member; the same applies in the reverse case.

Dies hat zur Folge, daß das beim Drehen des Drehkörpers auftretende Reibmoment sich nicht erhöhen läßt, ohne daß auch die Andruckkraft des Abgriffsglieds auf der Widerstandsbahn erhöht wird.The consequence of this is that the frictional torque occurring when the rotating body is rotated cannot be increased without the pressing force of the tapping element on the resistance track also being increased.

Bei dem bekannten Drehwiderstand ist am Grundkörper ein Gewindezapfen befestigt, mit dem sich der Drehwiderstand an einer Grundplatte fest­legel läßt. Der Gewindezapfen kann auch als elektrischer Anschluß dienen.In the known rotary resistor, a threaded pin is attached to the base body, with which the rotary resistor can be fixed to a base plate. The threaded pin can also serve as an electrical connection.

Bei einem ähnlichen bekannten Drehwiderstand ist das Drehteil gegenüber dem Grundkörper mit einem Zapfen und einem Sprengring axial verspannt. Auch hier hängt das erreichte Reibmoment von verschiedenen Unsicher­heitsfaktoren ab, so daß es kaum exakt bestimmbar ist.In a similar known rotational resistance, the rotating part is axially clamped with respect to the base body with a pin and a snap ring. Here too, the friction torque achieved depends on various uncertainty factors, so that it can hardly be determined exactly.

In der US-PS 4 430 634 ist ein Drehpotentiometer mit einer Rückstell­feder beschrieben. Hier kommt es auf eine besondere Einstellbarkeit des Reibmoments nicht an. Ein ähnliches Drehpotentiometer ist aus der EP-O 157 666 bekannt.US Pat. No. 4,430,634 describes a rotary potentiometer with a return spring. A special adjustability of the friction torque is not important here. A similar rotary potentiometer is known from EP-O 157 666.

Aufgabe der Erfindug ist es, einen Drehwiderstand der eingangs genannten Art vorzuschlagen, bei dem ein beim Drehen des Drehkörpers auftretendes Reibmoment, auch bei geringen Abmessungen des Drehwiderstandes, einfach einstellbar und justierbar ist.The object of the invention is to propose a rotational resistance of the type mentioned at the outset, in which a frictional torque occurring when the rotating body is rotated, even with small dimensions of the rotational resistance, is easily adjustable and adjustable.

Erfindungsgemäß ist obige Aufgabe bei einem Drehwiderstand der eingangs genannten Art dadurch gelöst, daß zur axialen Verspannung des Dreh­körpers eine zur Drehachse koaxiale Schraube vorgesehen ist, deren Schaft mit dem Grundkörper verschraubt ist und deren Kopf auf den Drehkörper drückt. Durch mehr oder weniger festes Anziehen der Schraube läßt sich die Kraft einstellen, mit der der Drehkörper auf den Grund­körper gedrückt ist. Das beim Drehen des Grundkörpers auftretende Reib­moment kann dadurch exakt eingestellt werden. Günstig ist auch, daß bei einem zunächst zu hoch eingestellten Reibmoment durch geringfügiges Lösen der Schraube dieses reduziert werden kann.According to the invention, the above object is achieved in the case of a rotational resistance of the type mentioned at the outset in that a screw which is coaxial with the axis of rotation is provided for axially bracing the rotating body, the shaft of which is screwed to the basic body and the head of which is on the Rotating body presses. The force with which the rotating body is pressed onto the base body can be adjusted by tightening the screw to a greater or lesser extent. The frictional torque that occurs when the base body is rotated can thereby be set precisely. It is also advantageous that if the frictional torque is initially set too high, this can be reduced by loosening the screw slightly.

In bevorzugter Ausgestaltung der Erfindung erstreckt sich die Wider­standsbahn koaxial um die Drehachse und das Abgriffsglied drückt in zur Drehachse radialer Richtung auf die Widerstandsbahn. Die Andruckkraft des Abgriffsglieds wirkt also quer zur Kraft, mit der der Drehkörper auf den Grundkörper gedrückt wird. Dadurch ist erreicht, daß die Kräfte voneinander unabhängig sind. Es ist damit möglich, ein hohes Reibmoment zu erreichen, ohne daß auch die Andruckkraft des Abgriffsglieds auf der Widerstandsbahn entsprechend hoch wird.In a preferred embodiment of the invention, the resistance track extends coaxially around the axis of rotation and the tap member presses on the resistance track in the radial direction of the axis of rotation. The pressing force of the tap member thus acts transversely to the force with which the rotating body is pressed onto the base body. This ensures that the forces are independent of one another. It is thus possible to achieve a high frictional torque without the pressing force of the tapping element on the resistance track also becoming correspondingly high.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung eines Ausführungs­beispiels.Further advantageous refinements of the invention result from the subclaims and the following description of an exemplary embodiment.

In der Zeichnung zeigen:

  • Figur 1 einen Drehwiderstand im Schnitt,
  • Figur 2 den Drehwiderstand längs der Linie II-II nach Figur 1 in Aufsicht
    und
  • Figur 3 eine Baueinheit gegenüber Figur 2 verkleinert.
The drawing shows:
  • FIG. 1 shows a rotational resistance in section,
  • Figure 2 shows the rotational resistance along the line II-II of Figure 1 in supervision
    and
  • Figure 3 shows a unit reduced compared to Figure 2.

Ein Drehwiderstand (1) weist einen Kunststoff-Grundkörper (2) auf, in dem ein zylindrischer Innenraum (3) gebildet ist. Innen an der zylin­drischen Wand (4) des Innenraums (3) läuft eine Widerstandsbahn (5) um. Deren beide Enden sind mit Anschlußstiften (6, 7) verbunden, um welche der Grundkörper (2) gespritzt ist.A rotary resistor (1) has a plastic base body (2) in which a cylindrical interior (3) is formed. A resistance track (5) runs around the inside of the cylindrical wall (4) of the interior (3). Both ends of which are connected to connecting pins (6, 7) around which the base body (2) is injection molded.

Konzentrisch zur Wand (4) ist am Grundkörper (2) eine metallische Hülse (8) befestigt. Diese kann dadurch am Grundkörper (2) befestigt sein, daß bei dessen Herstellung die ihn bildende Kunststoffmasse um die Hülse (8) gespritzt ist. Die Hülse (8) weist ein Innengewinde (9) auf. In dieses ist der Schaft (10) einer Schraube (11) eingeschraubt, deren Kopf mit (12) bezeichnet ist.A metallic sleeve (8) is attached to the base body (2) concentrically with the wall (4). This can be fastened to the base body (2) by injecting the plastic compound forming it around the sleeve (8) during its manufacture. The sleeve (8) has an internal thread (9). In this the shaft (10) of a screw (11) is screwed, the head of which is designated (12).

Am Grundkörper (2) ist ein Drehkörper (13) um eine mit der Achse der Schraube (11) zusammenfallende Drehachse (14) gelagert. Der Drehkörper (13) weist einen Boden (15) mit einer Durchbrechung (16) für die Schraube (11) und einen Ringrand (17) auf. Außen am Ringrand (17) sind mehrere Vorsprünge (18) zur Betätigung des Drehkörpers (13) ausgeformt. Auf den Drehkörper (13) ist ein den Schraubenkopf (12) verdeckender Deckel (19) aufgeschnappt.A rotary body (13) is mounted on the base body (2) about an axis of rotation (14) coinciding with the axis of the screw (11). The rotating body (13) has a base (15) with an opening (16) for the screw (11) and an annular rim (17). A plurality of projections (18) for actuating the rotating body (13) are formed on the outside of the ring edge (17). A cover (19) covering the screw head (12) is snapped onto the rotating body (13).

Der Ringrand (17) übergreift die Wand (4). Er ist radial zur Drehachse (14) von einer an dieser umlaufenden Stufe (20) geführt. Mit seiner Stirnfläche (21) liegt der Ringrand (17) an einer Ringfläche (22) des Grundkörpers (2) an.The ring edge (17) overlaps the wall (4). It is guided radially to the axis of rotation (14) by a step (20) rotating around it. With its end face (21), the ring edge (17) lies against an annular surface (22) of the base body (2).

Am Boden (15) ist eine Halterung (23) für ein Abgriffsglied (24) ange­formt. Das Abgriffsglied (24) liegt mit seinem einen Ende (25) radial federnd an der Widerstandsbahn (5) an. Mit seinem anderen Ende (26) liegt es ebenfalls radial federnd an der Hülse (8) an.A holder (23) for a tap member (24) is formed on the base (15). The tap member (24) rests with its one end (25) radially resiliently on the resistance track (5). With its other end (26) it also rests radially resiliently on the sleeve (8).

Das beim Drehen des Drehkörpers (13) gewünschte Reibmoment wird folgen­dermaßen eingestellt:The desired friction torque when turning the rotating body (13) is set as follows:

Nach dem Aufsetzen des Drehkörpers (13) auf den Grundkörper (2) wird die Schraube (11) in die Hülse (8) eingeschraubt bis deren Kopf (12) auf den Boden (15) drückt. Die Schraube (11) wird dann so fest ange­zogen, daß die Stirnfläche (21) des Ringrandes (17) so stark auf die Ringfläche (22) des Grundkörpers (2) drückt, wie für das zum Drehen des Drehkörpers (13) gewünschte Betätigungsmoment nötig ist. Die Andruck­kraft der Enden (25, 26) des Abgriffsglieds (24) auf der Widerstands­bahn (5) bzw. die Hülse (8) ändert sich dabei nicht.After placing the rotating body (13) on the base body (2), the screw (11) is screwed into the sleeve (8) until its head (12) presses on the floor (15). The screw (11) is then tightened so that the end face (21) of the ring edge (17) presses so strongly on the ring surface (22) of the base body (2) as is necessary for the actuating torque required for rotating the rotating body (13) is. The pressing force of the ends (25, 26) of the tapping member (24) on the resistance track (5) or the sleeve (8) does not change.

Nach der richtigen Einstellung der Schraube (11) kann diese in der Hülse (8) festgelegt werden. Schließlich wird der Deckel (19) aufgeschnappt.After the correct adjustment of the screw (11), it can be fixed in the sleeve (8). Finally, the lid (19) is snapped on.

Der Schaft (10) der Schraube (11) überragt mit einem Abschnitt (27) den Grundkörper (2) (vgl. Figur 1 und 3). Am Grundkörper (2) ist neben dem Abschnitt (27) ein Zapfen (28) als Verdrehschutz angeformt.The shaft (10) of the screw (11) projects beyond the base body (2) with a section (27) (cf. FIGS. 1 and 3). A pin (28) is formed on the base body (2) in addition to the section (27) to prevent rotation.

Zur Montage des Drehwiderstandes (1) zu einer Baueinheit (vgl. Figur 3) wird der Widerstand (1) mit dem Abschnitt (27) und dem Zapfen (28) in eine entsprechende Ausnehmung einer Grundplatte (29) gesteckt. Der Ab­schnitt (27) durchragt die Grundplatte (29), so daß sich der Drehwider­stand (1) mittels einer auf den Abschnitt (27) aufgeschraubten Mutter (30) an der Grundplatte (29) festlegen läßt. Im Bereich der Mutter (30) ist an der Grundplatte (29) eine elektrische Leitfläche (31) oder ein anderer elektrischer Anschluß vorgesehen. Dadurch wird mittels der Mutter (30) eine elektrische Verbindung über die Schraube (11), die metallische Hülse (8) und das Ende (26) zum Abgriffsglied (24) herge­stellt.To assemble the rotary resistor (1) to form a structural unit (cf. FIG. 3), the resistor (1) with the section (27) and the pin (28) is inserted into a corresponding recess in a base plate (29). The section (27) extends through the base plate (29), so that the rotary resistor (1) is screwed onto the section (27) by means of a nut (30) on the base plate (29). In the area of the nut (30), an electrical guide surface (31) or another electrical connection is provided on the base plate (29). As a result, an electrical connection is made to the tap (24) by means of the nut (30) via the screw (11), the metallic sleeve (8) and the end (26).

Die Schraube (11) erfüllt mehrere Funktionen. Sie hält den Drehkörper (13) am Grundkörper (2). Sie stellt die nötige Andruckkraft zwischen der Stirnfläche (21) und der Ringfläche (22) sicher. Sie dient der mechani­schen Halterung des Drehwiderstandes (1) an der Grundplatte (29) und sie bildet den elektrischen Anschluß des Abgriffsgliedes (24).The screw (11) fulfills several functions. It holds the rotating body (13) on the base body (2). It ensures the necessary contact pressure between the end face (21) and the ring face (22). It serves to mechanically hold the rotary resistor (1) on the base plate (29) and it forms the electrical connection of the tapping element (24).

Bezugszeichenliste 11/86 Pt.+GMReference number list 11/86 Pt. + GM

  • 1 Drehwiderstand1 rotary resistor
  • 2 Grundkörper2 basic bodies
  • 3 Innenraum3 interior
  • 4 Zylinder-Wand4 cylinder wall
  • 5 Widerstandsbahn5 resistance track
  • 6 Anschlußstift6 connector pin
  • 7 Anschlußstift7 connector pin
  • 8 Hülse8 sleeve
  • 9 Innengewinde9 internal thread
  • 10 Schaft10 shaft
  • 11 Schraube11 screw
  • 12 Schraubenkopf12 screw head
  • 13 Drehkörper13 rotating bodies
  • 14 Drehachse14 axis of rotation
  • 15 Boden15 floor
  • 16 Durchbrechung16 breakthrough
  • 17 Ringrand17 ring edge
  • 18 Vorsprung18 head start
  • 19 Deckel19 cover
  • 20 Stufe20 level
  • 21 Stirnfläche21 end face
  • 22 Ringfläche22 ring surface
  • 23 Halterung23 bracket
  • 24 Abgriffsglied24 tap
  • 25 Ende25 end
  • 26 Ende26 end
  • 27 AbschnittSection 27
  • 28 Zapfen28 cones
  • 29 Grundplatte29 base plate
  • 30 Mutter30 mother
  • 31 Leitfläche31 guide surface

Claims (9)

1. Drehwiderstand, bei dem an einem eine Widerstandsbahn tragenden Grundkörper ein Drehkörper drehbar gelagert ist, der zur Erzeugung eines Reibmoments beim Drehen mit dem Grundkörper axial verspannt ist und an dem ein auf der Widerstandsbahn aufliegendes Abgriffs­glied befestigt ist,
dadurch gekennzeichnet,
daß zur axialen Verspannung eine zur Drehachse (14) koaxiale Schraube (11) vorgesehen ist, deren Schaft (10) mit dem Grundkörper (2) verschraubt ist und deren Kopf (12) auf den Drehkörper (13) drückt, dessen Stirnfläche (21) am Ringrand (17) auf eine Ring­fläche (22) des Grundkörpers (2) drückt.1. Rotary resistance, in which a rotating body is rotatably mounted on a base body carrying a resistance track, which is axially braced with the base body to generate a frictional torque when rotating, and to which a tapping element resting on the resistance track is fastened,
characterized,
that for the axial bracing a screw (11) coaxial to the axis of rotation (14) is provided, the shaft (10) of which is screwed to the base body (2) and the head (12) of which presses on the rotating body (13), the end face (21) presses on the ring edge (17) on an annular surface (22) of the base body (2). 2. Drehwiderstand nach Anspruch 1,
dadurch gekennzeichnet,
daß die Widerstandsbahn (5) sich koaxial zur Drehachse (14) er­streckt und daß das Abgriffsglied (24) in zur Drehachse (14) radialer Richtung auf die Widerstandsbahn (5) drückt.2. Rotary resistor according to claim 1,
characterized,
that the resistance track (5) extends coaxially to the axis of rotation (14) and that the tap member (24) presses in the radial direction to the axis of rotation (14) on the resistance track (5). 3. Drehwiderstand nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß der Schaft (10) der Schraube (11) in eine Hülse (8) geschraubt ist, die am Grundkörper (2) festsitzt.3. Rotary resistor according to claim 1 or 2,
characterized,
that the shaft (10) of the screw (11) is screwed into a sleeve (8) which is firmly attached to the base body (2). 4. Drehwiderstand nach Anspruch 3,
dadurch gekennzeichnet,
daß die Hülse (8) elektrisch leitfähig ist und an ihr das der Wider­standsbahn (5) abgewandte Ende (26) des Abgriffsgliedes (24) elek­trisch leitend anliegt und daß die Hülse (8) oder die Schraube (11) einen elektrischen Anschlußpol bildet.4. rotational resistance according to claim 3,
characterized,
that the sleeve (8) is electrically conductive and the end (26) of the tapping member (24) facing away from the resistance track (5) bears against it in an electrically conductive manner and that the sleeve (8) or the screw (11) forms an electrical connection pole. 5. Drehwiderstand nach Anspruch 4,
dadurch gekennzeichnet,
daß das Abgriffsglied (24) mit seinem der Widerstandsbahn (5) abge­wandten Ende (26) in zur Drehachse (14) radialer Richtung auf die Hülse (8) drückt.5. rotational resistance according to claim 4,
characterized,
that the tapping member (24) presses with its end (26) facing away from the resistance track (5) in the radial direction of the axis of rotation (14) onto the sleeve (8). 6. Drehwiderstand nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Schaft (10) der Schraube (11) mit einem Abschnitt (27) den Grundkörper (2) überragt und daß dieser Abschnitt (27) an einer Grundplatte (29) festgelegt ist.6. Rotary resistor according to one of the preceding claims,
characterized,
that the shaft (10) of the screw (11) with a section (27) projects beyond the base body (2) and that this section (27) is fixed to a base plate (29). 7. Drehwiderstand nach Anspruch 6,
dadurch gekennzeichnet,
daß die Schraube (11) elektrisch leitfähig ist und ihr Abschnitt (27) mit einem elektrischen Leiter (31) kontaktiert ist.7. Rotary resistor according to claim 6,
characterized,
that the screw (11) is electrically conductive and its section (27) is contacted with an electrical conductor (31). 8. Drehwiderstand nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Grundkörper (2) aus Kunststoff an die Hülse (8) angespritzt ist.8. Rotary resistor according to one of the preceding claims,
characterized,
that the base body (2) made of plastic is molded onto the sleeve (8). 9. Drehwiderstand nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß ein den Grundkörper (2) übergreifender Ringrand (17) des Dreh­körpers (13) radial zur Drehachse (14) an einer umlaufenden Stufe (20) des Grundkörpers (2) geführt ist.9. Rotary resistor according to one of the preceding claims,
characterized,
that an annular edge (17) of the rotary body (13) overlapping the base body (2) is guided radially to the axis of rotation (14) on a circumferential step (20) of the base body (2).
EP87113071A 1986-09-12 1987-09-08 Rotary variable resistor Expired - Lifetime EP0259821B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863631056 DE3631056A1 (en) 1986-09-12 1986-09-12 TURNING RESISTANCE
DE3631056 1986-09-12

Publications (3)

Publication Number Publication Date
EP0259821A2 true EP0259821A2 (en) 1988-03-16
EP0259821A3 EP0259821A3 (en) 1989-07-26
EP0259821B1 EP0259821B1 (en) 1992-01-08

Family

ID=6309435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113071A Expired - Lifetime EP0259821B1 (en) 1986-09-12 1987-09-08 Rotary variable resistor

Country Status (6)

Country Link
US (1) US4816801A (en)
EP (1) EP0259821B1 (en)
JP (1) JPS6373602A (en)
DE (1) DE3631056A1 (en)
DK (1) DK165610C (en)
ES (1) ES2029465T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01129804U (en) * 1988-02-26 1989-09-04
DE4122789C1 (en) * 1991-07-10 1993-01-21 Leopold Kostal Gmbh & Co Kg, 5880 Luedenscheid, De Actuating element for adjusting heating, headlamps, dashboard illumination, etc. in vehicle - has potentiometer surrounded by flat bronze strip fixed to housing at least in one region
JP3367787B2 (en) * 1995-05-29 2003-01-20 株式会社村田製作所 Variable resistor
DE19533991B4 (en) * 1995-09-14 2009-07-02 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH potentiometer
DE19720543C1 (en) * 1997-05-16 1998-05-20 Preh Elektro Feinmechanik Electrical rotary resistance
TWI571890B (en) * 2015-12-18 2017-02-21 台灣艾華電子工業股份有限公司 Rotary variable resistor
CN106935343B (en) * 2015-12-30 2019-03-26 台湾艾华电子工业股份有限公司 Rotary variable resistor

Citations (6)

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Publication number Priority date Publication date Assignee Title
US1693009A (en) * 1925-01-26 1928-11-27 Benjamin Electric Mfg Co Rheostat
US2451241A (en) * 1946-11-21 1948-10-12 Gen Electric Shielded volume control and switch
DE1086792B (en) * 1956-07-20 1960-08-11 Plessey Co Ltd Rotary resistor with off switch
US3032734A (en) * 1960-07-05 1962-05-01 Globe Union Inc Resistance trimmer knob
DE1921230A1 (en) * 1969-04-25 1971-02-25 Resista Fabrik Elek Scher Wide Potentiometers, especially trimmers
EP0127957A1 (en) * 1983-05-27 1984-12-12 Waters Manufacturing, Inc. Wiper for sliding electrical contact

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Publication number Priority date Publication date Assignee Title
DE10118C (en) * C. AD. ED. ALEXANDER in Berlin Table bed
US2329949A (en) * 1941-11-12 1943-09-21 Sonotone Corp Rheostat device
US2884506A (en) * 1956-03-12 1959-04-28 Carter Mfg Corp Variable resistor
US2901720A (en) * 1956-07-20 1959-08-25 Plessey Co Ltd Circuit breakers
DE1826686U (en) * 1960-05-18 1961-02-16 Preh Elektro Feinmechanik KNOB CONTROL.
NL297808A (en) * 1962-09-12
DE1490258B2 (en) * 1964-10-26 1970-08-06 Rosenthal Isolatoren GmbH, 8672 Selb Miniature potentiometer
DE7815934U1 (en) * 1978-05-27 1978-09-07 Wilhelm Ruf Kg, 8000 Muenchen KNOB ROTATION RESISTANCE
US4430634A (en) * 1982-01-18 1984-02-07 Cts Corporation Rotary potentiometer with molded terminal package

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693009A (en) * 1925-01-26 1928-11-27 Benjamin Electric Mfg Co Rheostat
US2451241A (en) * 1946-11-21 1948-10-12 Gen Electric Shielded volume control and switch
DE1086792B (en) * 1956-07-20 1960-08-11 Plessey Co Ltd Rotary resistor with off switch
US3032734A (en) * 1960-07-05 1962-05-01 Globe Union Inc Resistance trimmer knob
DE1921230A1 (en) * 1969-04-25 1971-02-25 Resista Fabrik Elek Scher Wide Potentiometers, especially trimmers
EP0127957A1 (en) * 1983-05-27 1984-12-12 Waters Manufacturing, Inc. Wiper for sliding electrical contact

Also Published As

Publication number Publication date
EP0259821A3 (en) 1989-07-26
DK477387A (en) 1988-03-13
JPS6373602A (en) 1988-04-04
DE3631056A1 (en) 1988-03-24
DE3631056C2 (en) 1991-03-14
EP0259821B1 (en) 1992-01-08
DK165610B (en) 1992-12-21
DK477387D0 (en) 1987-09-11
ES2029465T3 (en) 1992-08-16
DK165610C (en) 1993-05-03
US4816801A (en) 1989-03-28

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