EP0259821B1 - Rotary variable resistor - Google Patents

Rotary variable resistor Download PDF

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Publication number
EP0259821B1
EP0259821B1 EP87113071A EP87113071A EP0259821B1 EP 0259821 B1 EP0259821 B1 EP 0259821B1 EP 87113071 A EP87113071 A EP 87113071A EP 87113071 A EP87113071 A EP 87113071A EP 0259821 B1 EP0259821 B1 EP 0259821B1
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EP
European Patent Office
Prior art keywords
base member
screw
axis
rotation
rotary body
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
EP87113071A
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German (de)
French (fr)
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EP0259821A2 (en
EP0259821A3 (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 in an inseparable relationship. 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 rotational resistance can be fixed on 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.
  • a switch is installed under the rotary body within the resistance ring, which switch the rotary body actuates by its rotary movement (DE-B-1 086 792).
  • the rotating body is equipped with a coaxial hollow cylinder directed against the base body, the end face of which controls the switching contact held on the base body.
  • the distance of the rotating body from the base body is decisive for the functioning of the switch, it can be set using an axis spindle. As far as this setting causes a frictional moment of the rotating body or a pressing force of the tapping element on the resistance track, these are random.
  • the rotating body is rotatably mounted on the axis spindle by means of a screw.
  • the object of the invention is to propose a rotational resistance of the type mentioned, in which a friction torque occurring when the rotating body rotates, even with small dimensions of the rotational resistance, and without changing the pressing force of the tap on the resistance track, is easily adjustable and adjustable.
  • the force with which the rotating body is pressed onto the base body can be adjusted by tightening the screw more or less firmly.
  • the frictional torque that occurs when the base body is rotated can thereby be set precisely. It is also favorable that if the frictional torque is initially set too high, this can be reduced by slightly loosening the screw.
  • the resistance path extends coaxially about the axis of rotation and the tap in Axis of rotation in the radial direction presses on the resistance track.
  • 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 each other. 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 rotating body (13) is mounted on the base body (2) about a rotating axis (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: 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 rim (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 rotational resistance (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 member (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).

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adjustable Resistors (AREA)

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 in an inseparable relationship. 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 festlegen läßt. Der Gewindezapfen kann auch als elektrischer Anschluß dienen.In the known rotational resistance, a threaded pin is attached to the base body, with which the rotational resistance can be fixed on 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.

Bei einem anderen bekannten Drehwiderstand ist unter dem Drehkörper innerhalb des Widerstandsringes ein Schalter installiert, den der Drehkörper durch seine Drehbewegung betätigt (DE-B-1 086 792). Dazu ist der Drehkörper mit einem gegen den Grundkörper gerichteten, koaxialen Hohlzylinder ausgestattet, dessen Stirnfläche den am Grundkörper gehaltenen Schaltkontakt steuert. Der Abstand des Drehkörpers vom Grundkörper ist für das Funktionieren des Schalters maßgebend, er ist mittels einer Achsspindel einstellbar. Soweit dieses Einstellen ein Reibmoment des Drehkörpers oder eine Andruckkraft des Abgriffgliedes auf der Widerstandsbahn bewirkt, sind diese zufällig. Der Drehkörper ist mittels einer Schraube an der Achsspindel drehgelagert.In another known rotary resistor, a switch is installed under the rotary body within the resistance ring, which switch the rotary body actuates by its rotary movement (DE-B-1 086 792). For this purpose, the rotating body is equipped with a coaxial hollow cylinder directed against the base body, the end face of which controls the switching contact held on the base body. The distance of the rotating body from the base body is decisive for the functioning of the switch, it can be set using an axis spindle. As far as this setting causes a frictional moment of the rotating body or a pressing force of the tapping element on the resistance track, these are random. The rotating body is rotatably mounted on the axis spindle by means of a screw.

In der US-A-4 430 634 ist ein Drehpotentiometer mit einer Rückstellfeder beschrieben. Hier kommt es auf eine besondere Einstellbarkeit des Reibmoments nicht an. Die Widerstandsbahn des Drehpotentiometers erstreckt sich koaxial zu seiner Drehachse auf der Innenseite des Potentiometergehäuses. Eine ähnliche Anordnung der Widerstandsbahn ist auch aus der EP-A-0 157 666 und der EP-A-0 127 957 bekannt.In US-A-4 430 634 a rotary potentiometer with a return spring is described. A special adjustability of the friction torque is not important here. The resistance path of the rotary potentiometer extends coaxial to its axis of rotation on the inside of the potentiometer housing. A similar arrangement of the resistance track is also known from EP-A-0 157 666 and EP-A-0 127 957.

Aufgabe der Erfindung ist es, einen Drehwiderstand der eingangs genannten Art vorzuschlagen, bei dem ein beim Drehen des Drehkörpers auftretendes Reibmoment, auch bei geringen Abmessungen des Drehwiderstandes, und ohne Veränderung der Andruckkraft des Abgriffsgliedes auf der Widerstandsbahn, einfach einstellbar und justierbar ist.The object of the invention is to propose a rotational resistance of the type mentioned, in which a friction torque occurring when the rotating body rotates, even with small dimensions of the rotational resistance, and without changing the pressing force of the tap on the resistance track, is easily adjustable and adjustable.

Erfindungsgemäß ist obige Aufgabe bei einem Drehwiderstand der eingangs genannten Art gelöst durch die Vereinigung der Merkmale:

  • der Drehkörper stützt sich mit der Stirnfläche seines Ringrandes auf eine Ringfläche des Grundkörpers ab,
  • die axiale Verspannung des Drehkörpers ist durch eine koaxial zur Drehachse angeordneten Schraube einstellbar, wobei der Schaft der Schraube mit dem Grundkörper verschraubt ist und der Kopf der Schraube auf den Boden des Drehkörpers drückt,
  • die Widerstandsbahn ist koaxial zur Drehachse angeordnet und
  • das Abgriffsglied drückt in zur Drehachse radialer Richtung auf die Widerstandsbahn.
According to the invention, the above object is achieved with a rotational resistance of the type mentioned at the outset by combining the features:
  • the rotating body is supported with the end face of its ring edge on an annular surface of the base body,
  • the axial bracing of the rotating body is adjustable by means of a screw arranged coaxially to the axis of rotation, the shaft of the screw being screwed to the base body and the head of the screw pressing onto the bottom of the rotating body,
  • the resistance track is arranged coaxially to the axis of rotation and
  • the tap member presses on the resistance track in the radial direction of the axis of rotation.

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. Dabei ist vorteilhaft, daß sich die Widerstandsbahn koaxial um die Drehachse erstreckt und das Abgriffsglied in zur Drehachse radialer Richtung auf die Widerstandsbahn drückt. 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.The force with which the rotating body is pressed onto the base body can be adjusted by tightening the screw more or less firmly. The frictional torque that occurs when the base body is rotated can thereby be set precisely. It is also favorable that if the frictional torque is initially set too high, this can be reduced by slightly loosening the screw. It is advantageous that the resistance path extends coaxially about the axis of rotation and the tap in Axis of rotation in the radial direction presses on the resistance track. 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 each other. 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. Es folgt die Beschreibung eines Ausführungsbeispiels. 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.
Further advantageous embodiments of the invention result from the subclaims. The following is a description of an exemplary embodiment. The drawing shows:
Figure 1
a rotational resistance on average,
Figure 2
the rotational resistance along the line II-II of Figure 1 in supervision and
Figure 3
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 rotating body (13) is mounted on the base body (2) about a rotating axis (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:
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.The desired friction torque when turning the rotating body (13) is set as follows:
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 rim (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 (see 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 rotational resistance (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 member (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).

BezugszeichenlisteReference symbol list

11
DrehwiderstandRotational resistance
22nd
GrundkörperBasic body
33rd
Innenrauminner space
44th
Zylinder-WandCylinder wall
55
WiderstandsbahnResistance track
66
AnschlußstiftConnector pin
77
AnschlußstiftConnector pin
88th
HülseSleeve
99
Innengewindeinner thread
1010th
Schaftshaft
1111
Schraubescrew
1212
SchraubenkopfScrew head
1313
DrehkörperRotating body
1414
DrehachseAxis of rotation
1515
Bodenground
1616
DurchbrechungBreakthrough
1717th
RingrandRing edge
1818th
Vorsprunghead Start
1919th
Deckelcover
2020th
Stufestep
2121
StirnflächeFace
2222
RingflächeRing surface
2323
Halterungbracket
2424th
AbgriffsgliedTap
2525th
EndeThe End
2626
EndeThe End
2727th
Abschnittsection
2828
ZapfenCones
2929
GrundplatteBase plate
3030th
Muttermother
3131
LeitflächeGuide surface

Claims (3)

  1. Rotary resistor in which a rotary body (13) is rotatably mounted on a base member (2) carrying a resistor path (5), this rotary body being axially clamped with the base member (2) to produce a friction moment as it rotates, and a pick-up member (24) lying on the resistor path (5) being secured on this rotary body,
    characterised by the combination of the following features:
    - the rotary body (13) is supported with the end face (21) of its annular rim (17) on an annular surface (22) of the base member (2),
    - the axial clamping of the rotary body (13) can be adjusted by a screw (11) arranged co-axially to the axis of rotation (14), the shaft (10) of the screw (11) being screwed to the base member (2), and the head (12) of the screw (11) pressing on the bottom (15) of the rotary body (13),
    - the resistor path (5) is arranged on the inside coaxially to the axis of rotation (14) on a cylindrical wall (4) of an inner chamber (3) formed in the base member (2) and
    - the pick-up member (24) presses onto the resistor path (5) in the radial direction with respect to the axis of rotation (14).
  2. Rotary resistor according to claim 1, characterised in that the shaft (10) of the screw (11) is screwed into an electrically conductive sleeve (8) secured on the base member (2), and the pick-up member (24) presses onto the sleeve (8) with its end (26) remote from the resistor path (5) in the radial direction with respect to the axis of rotation (14).
  3. Rotary resistor according to one of the preceding claims, characterised in that an annular rim (17) of the rotary body (13) engaging over the base member (2) is guided radially to the axis of rotation (14) on a circumferential step (20) of the base member (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 EP0259821A2 (en) 1988-03-16
EP0259821A3 EP0259821A3 (en) 1989-07-26
EP0259821B1 true 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127957A1 (en) * 1983-05-27 1984-12-12 Waters Manufacturing, Inc. Wiper for sliding electrical contact

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DE10118C (en) * C. AD. ED. ALEXANDER in Berlin Table bed
US1693009A (en) * 1925-01-26 1928-11-27 Benjamin Electric Mfg Co Rheostat
US2329949A (en) * 1941-11-12 1943-09-21 Sonotone Corp Rheostat device
US2451241A (en) * 1946-11-21 1948-10-12 Gen Electric Shielded volume control and switch
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
DE1086792B (en) * 1956-07-20 1960-08-11 Plessey Co Ltd Rotary resistor with off switch
DE1826686U (en) * 1960-05-18 1961-02-16 Preh Elektro Feinmechanik KNOB CONTROL.
US3032734A (en) * 1960-07-05 1962-05-01 Globe Union Inc Resistance trimmer knob
NL297808A (en) * 1962-09-12
DE1490258B2 (en) * 1964-10-26 1970-08-06 Rosenthal Isolatoren GmbH, 8672 Selb Miniature potentiometer
DE1921230A1 (en) * 1969-04-25 1971-02-25 Resista Fabrik Elek Scher Wide Potentiometers, especially trimmers
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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127957A1 (en) * 1983-05-27 1984-12-12 Waters Manufacturing, Inc. Wiper for sliding electrical contact

Also Published As

Publication number Publication date
DE3631056A1 (en) 1988-03-24
ES2029465T3 (en) 1992-08-16
EP0259821A2 (en) 1988-03-16
DK477387A (en) 1988-03-13
US4816801A (en) 1989-03-28
EP0259821A3 (en) 1989-07-26
JPS6373602A (en) 1988-04-04
DK477387D0 (en) 1987-09-11
DK165610C (en) 1993-05-03
DK165610B (en) 1992-12-21
DE3631056C2 (en) 1991-03-14

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