EP0327175B1 - Turning knob for a control device or the like - Google Patents

Turning knob for a control device or the like Download PDF

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Publication number
EP0327175B1
EP0327175B1 EP89200196A EP89200196A EP0327175B1 EP 0327175 B1 EP0327175 B1 EP 0327175B1 EP 89200196 A EP89200196 A EP 89200196A EP 89200196 A EP89200196 A EP 89200196A EP 0327175 B1 EP0327175 B1 EP 0327175B1
Authority
EP
European Patent Office
Prior art keywords
base body
hub
rotary knob
actuating shaft
knob
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
EP89200196A
Other languages
German (de)
French (fr)
Other versions
EP0327175A1 (en
Inventor
Michael Mohr
Günter Koglin
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.)
Bauknecht Hausgeraete GmbH
Whirlpool International BV
Original Assignee
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
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Filing date
Publication date
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Application filed by Bauknecht Hausgeraete GmbH, Whirlpool Europe BV filed Critical Bauknecht Hausgeraete GmbH
Publication of EP0327175A1 publication Critical patent/EP0327175A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/08—Turn knobs
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/08—Controlling members for hand actuation by rotary movement, e.g. hand wheels
    • G05G1/10—Details, e.g. of discs, knobs, wheels or handles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H2019/008—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand with snap mounting of rotatable part on fixed part, e.g. rotor on stator, operating knob on switch panel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20732—Handles
    • Y10T74/20834—Hand wheels
    • Y10T74/2084—Knob or dial

Definitions

  • the invention relates to a rotary knob mounted in a housing opening for a control unit with a base body, which is connected in a rotationally fixed manner to an actuating shaft of the control unit, and with a control handle which is connected in a rotationally fixed manner to the base body via a latching connection.
  • the control handle has a cylindrical outer surface which is rotatably guided in a cylindrical receptacle of the housing.
  • the housing part, in which the rotary knob is arranged largely recessed, can be a front wall of a household appliance or an area of a control panel.
  • the control handle is connected to the base body via an intermediate piece and a universal joint piece.
  • the control handle is connected in a rotationally fixed manner to the base body and thus to the actuating shaft of the control unit via the universal joint piece. This is intended to make it possible to compensate for bearing deviations.
  • the invention has for its object to design a knob of the type mentioned so that it is easy to manufacture and assemble, flexible use and secured against displacement in the axial direction.
  • a rotary knob of the type mentioned at the outset in that the base body is provided with latching hooks which pass through the housing opening and whose latching lugs form a receptacle for the housing parts delimiting the opening with stops on the base body.
  • the base body can thus be fixed in the housing opening in a simple manner, regardless of the control handle.
  • movement of the rotary knob in the axial direction is limited in a simple manner. This prevents the knob from being pulled out of the housing and from the actuating shaft of the control unit in an unintentional or unauthorized manner.
  • the base body held in the housing opening can be formed with play relative to the edge of the housing opening, so that bearing deviations with regard to the longitudinal axes of the rotary knob and the actuating shaft can be compensated for.
  • the locking lugs of the locking hooks located on one side of the housing opening and the stops of the base body located on the other side of the housing opening form, in a very simple manner, a receiving space for the housing parts delimiting the housing opening.
  • control handles can only be used, for example, after transportation. They are therefore largely protected against damage in transit. Simplifications also result from the fact that differently designed control handles can be connected to identically designed base bodies. This results in a greater possibility of variation on one side and a smaller variety of parts on the other side.
  • the base body has a first hub with a pocket-shaped receiving area for receiving an end section of the actuating shaft and that the control handle has a further hub for receiving the first hub.
  • a rotationally fixed connection between the control handle and the actuating shaft can thus be produced and assembled in a simple manner. Due to the pocket-shaped receiving area of the first hub, the housing part is essentially sealed off from the control unit after the insertion of a base body.
  • the length of the pocket-shaped receiving area can be predetermined so that deviations in the position of the actuating shaft can be compensated. Deviations in the axial direction of the actuating shaft can be compensated for by moving the actuating shaft in the hub.
  • the base body has openings for receiving snap hooks attached to the control handle.
  • the flexibility of locking hooks can thus be increased in a simple manner.
  • the base body and the shift handle each have three locking hooks. This results in a simple and safe production of such snap connections.
  • control handle has a hollow cylindrical section for receiving the base body in regions. So that after inserting a control handle in a base body in a visually appealing and safe manner Completion of the rotary knob against the housing part and thus also against the control device and its electrical control lines can be achieved.
  • base body and / or the shift handle are integrally formed. They are easy to manufacture from plastic, for example by injection molding.
  • a base body 5 of a rotary knob designated overall with 7 (FIG. 5) is inserted.
  • the housing part 3 can e.g. belong to a front wall of a domestic appliance or to a control panel.
  • the one-piece, e.g. by injection molding, plastic body 5 has a blind hole closed first hub 9 for receiving an end portion of a partially shown actuating shaft 10 of a control device, not shown, e.g. a program control unit of a washing machine or dishwasher or a rotary switch.
  • a hub bore 11 has a flattened area 13 which is adapted to a likewise flattened area 12 of the actuating shaft 10.
  • its end region is arranged in the hub bore 11, which is designed as the receiving region of the hub 9, and is displaceable in the axial direction.
  • the hub 9 is also provided with a flattened area 15 with respect to its lateral surface with substantially the same wall thickness.
  • a disk-shaped intermediate piece 16 extends radially outward from a central piece of the hub 9 and essentially perpendicular to a central axis of the hub 9.
  • three segment-shaped openings 17 are formed at the same distance from one another.
  • three latching hooks 19 extend from the intermediate piece 16 in the form of a cantilever arm Approach 22 with the same outside and inside diameters separated.
  • a latching nose 21 is formed, projecting in the longitudinal direction and radially outward beyond the shoulder 22.
  • Each of the elastic locking hooks 19 is arranged at a distance between two longitudinal ribs 23.
  • Each longitudinal rib 23 is formed adjacent to a slot 20 on the neck 22.
  • the longitudinal ribs 23 protrude beyond the shoulder 22 in the radially outward direction corresponding to the locking lugs 21.
  • Each longitudinal rib 23 extends in the axial direction from the intermediate piece 16 and ends at a distance from the locking lugs 21, so that between each other, essentially perpendicular to the central axis of the hub 9 standing contact surfaces 25, 27 of the locking lugs 21 or longitudinal ribs 23, an intermediate space for receiving an area of the housing part 3 delimiting the opening 1 is formed.
  • the base body 5 can thus be easily connected to the housing part 3 via the latching hook 19 and the longitudinal ribs 23 before the insertion of a complete rotary knob 7.
  • the opening 1 is closed with the exception of the openings 17 after the insertion of the base body 5 with respect to the interior of the housing part 3.
  • a switching handle 29 shown in FIGS. 3 and 4 individually and assembled in FIG. 5 with a base body 5 can be inserted into a base body 5.
  • the control handle 29 is essentially pot-shaped with a hollow cylindrical section 31 closed on one side for receiving the base body 5 in certain areas.
  • the control handle 29 can be designed independently of the base body 5; for easy handling, the hollow cylindrical section 31 has e.g. a corrugation 33 on the lateral surface.
  • a second hub 35 is formed thereon, which has a cross section adapted to the first hub 9 with a region 37 flattened inwards and outwards.
  • three locking hooks 39 which extend in the longitudinal direction parallel to the second hub 35 and extend beyond it, are formed on the switching handle 29 for connection to the base body 5 and can be guided through the openings 17 for fastening. Then, as shown in FIG. 5, they engage behind the intermediate piece 16 and form a latching connection.
  • projections 41 are formed on the control handle 29, radially outward to the second hub 35, which extend parallel to the latter and which act as a stop form for the intermediate piece 16. The rotary knob 7 can thus be rotated without there being any contact between the control handle 29 and the housing part 3 and thus an impairment of the function of the control handle.
  • the one snap connection with the snap hooks 19 for fastening the base body 5 to the housing part 3 can e.g. by means of latching hooks 19 stiffened with respect to the latching hooks 39 of the other latching connection so that it is more difficult to release than the other latching connection with the latching hooks 39. For releasing forces then first lead to a removal of the control handle 29. The electrical connections remain in this state Containing interior of the housing part 3 largely closed against unauthorized access by the base body 5.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Control Devices (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Description

Die Erfindung bezieht sich auf einen in einer Gehäuseöffnung gelagerten Drehknopf für ein Steuergerät mit einem Grundkörper, der drehfest mit einer Betätigungswelle des Steuergerätes verbunden ist, und mit einem Schaltgriff, der mit dem Grundkörper über eine Rastverbindung drehfest verbunden ist.The invention relates to a rotary knob mounted in a housing opening for a control unit with a base body, which is connected in a rotationally fixed manner to an actuating shaft of the control unit, and with a control handle which is connected in a rotationally fixed manner to the base body via a latching connection.

Bei einem gattungsgemäßen Drehknopf gemäß dem DE-U-82 31 565 weist der Schaltgriff eine zylinderförmige Mantelfläche auf, die in einer zylindrischen Aufnahme des Gehäuses drehbar geführt ist. Das Gehäuseteil, in dem der Drehknopf weitgehend versenkt angeordnet ist, kann dabei eine Frontwand eines Haushaltgerätes oder ein Bereich eines Bedienpults sein. Der Schaltgriff ist über ein Zwischenstück und ein Kardangelenkstück mit dem Grundkörper verbunden. Über das Kardangelenkstück ist der Schaltgriff drehfest mit dem Grundkörper und damit mit der Betätigungswelle des Steuergerätes verbunden. Es soll dabei ein Ausgleich von Lagerabweichungen ermöglicht werden. Neben einer relativ großen Teileanzahl und somit eines großen Herstellungs- und Montageaufwandes sind bei der bekannten Bauart Zusatzmaßnahmen erforderlich, um den Drehknopf gegenüber einer Bewegung in axialer Richtung, z.B. einer Herausnahme durch unberechtigte Personen, z.B. Kinder, zu sichern.In the case of a generic rotary knob according to DE-U-82 31 565, the control handle has a cylindrical outer surface which is rotatably guided in a cylindrical receptacle of the housing. The housing part, in which the rotary knob is arranged largely recessed, can be a front wall of a household appliance or an area of a control panel. The control handle is connected to the base body via an intermediate piece and a universal joint piece. The control handle is connected in a rotationally fixed manner to the base body and thus to the actuating shaft of the control unit via the universal joint piece. This is intended to make it possible to compensate for bearing deviations. In addition to a relatively large number of parts and thus a large amount of production and assembly work, additional measures are required in the known design in order to prevent the rotary knob from moving in the axial direction, e.g. removal by unauthorized persons, e.g. Children, secure.

Der Erfindung liegt die Aufgabe zugrunde, einen Drehknopf der eingangs genannten Art so auszubilden, daß er einfach herstell- und montierbar, flexibel einsetzbar und gegenüber Verschiebungen in axialer Richtung gesichert ist.The invention has for its object to design a knob of the type mentioned so that it is easy to manufacture and assemble, flexible use and secured against displacement in the axial direction.

Diese Aufgabe wird bei einem Drehknopf der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß der Grundkörper mit Rasthaken versehen ist, die die Gehäuseöffnung durchgreifen und deren Rastnasen mit Anschlägen des Grundkörpers eine Aufnahme bilden für die die Öffnung begrenzenden Gehäuseteile. Damit kann der Grundkörper, unabhängig von dem Schaltgriff, auf einfache Weise in der Gehäuseöffnung festgelegt werden. Ferner wird dadurch auf einfache Weise eine Bewegung des Drehknopfes in axialer Richtung begrenzt. Damit ist verhindert, daß der Drehknopf in unbeabsichtigter oder unbefugter Weise aus dem Gehäuse und von der Betätigungswelle des Steuergerätes gezogen werden kann. Der in der Gehäuseöffnung verrastet gehaltene Grundkörper kann mit Spiel gegenüber dem Rand der Gehäuseöffnung ausgebildet werden, so daß Lagerabweichungen betreffend die Längsachsen des Drehknopfes und der Betätigungswelle ausgeglichen werden können. Die auf der einen Seite der Gehäuseöffnung befindlichen Rastnasen der Rasthaken und die auf der anderen Seite der Gehäuseöffnung befindlichen Anschläge des Grundkörpers bilden auf sehr einfache Weise einen Aufnahmeraum für die die Gehäuseöffnung begrenzenden Gehäuseteile.This object is achieved according to the invention with a rotary knob of the type mentioned at the outset in that the base body is provided with latching hooks which pass through the housing opening and whose latching lugs form a receptacle for the housing parts delimiting the opening with stops on the base body. The base body can thus be fixed in the housing opening in a simple manner, regardless of the control handle. Furthermore, movement of the rotary knob in the axial direction is limited in a simple manner. This prevents the knob from being pulled out of the housing and from the actuating shaft of the control unit in an unintentional or unauthorized manner. The base body held in the housing opening can be formed with play relative to the edge of the housing opening, so that bearing deviations with regard to the longitudinal axes of the rotary knob and the actuating shaft can be compensated for. The locking lugs of the locking hooks located on one side of the housing opening and the stops of the base body located on the other side of the housing opening form, in a very simple manner, a receiving space for the housing parts delimiting the housing opening.

Dadurch, daß der Grundkörper zunächst ohne Schaltgriff in der Gehäuseöffnung befestigt werden kann, können Schaltgriffe z.B. erst nach einem Transport eingesetzt werden. Sie sind deshalb gegenüber Transportschäden weitgehend geschützt. Weiterhin ergeben sich Vereinfachungen dadurch, daß mit identisch ausgebildeten Grundkörpern unterschiedlich gestaltete Schaltgriffe verbunden werden können. Damit ergibt sich eine größere Variationsmöglichkeit auf der einen Seite und eine kleinere Teilevielfalt auf der anderen Seite.Because the base body can first be fastened in the housing opening without a control handle, control handles can only be used, for example, after transportation. They are therefore largely protected against damage in transit. Simplifications also result from the fact that differently designed control handles can be connected to identically designed base bodies. This results in a greater possibility of variation on one side and a smaller variety of parts on the other side.

In Ausgestaltung der Erfindung ist vorgesehen, daß der Grundkörper eine erste Nabe mit einem sacklochförmigen Aufnahmebereich zur Aufnahme eines Endabschnittes der Betätigungswelle aufweist und daß der Schaltgriff eine weitere Nabe zur Aufnahme der ersten Nabe aufweist. Eine drehfeste Verbindung zwischen dem Schaltgriff und der Betätigungswelle kann somit auf einfache Weise hergestellt und montiert werden. Durch den sacklochförmigen Aufnahmebereich der ersten Nabe ist das Gehäuseteil nach dem Einsetzen eines Grundkörpers im wesentlichen gegenüber dem Steuergerät abgeschlossen. Die Länge des sacklochförmigen Aufnahmebereiches ist dabei so vorgebbar, daß Abweichungen betreffend die Lageanordnung der Betätigungswelle ausgleichbar sind. Abweichungen in Achsrichtung der Betätigungswelle sind durch Verschieben der Betätigungswelle in der Nabe ausgleichbar.In an embodiment of the invention it is provided that the base body has a first hub with a pocket-shaped receiving area for receiving an end section of the actuating shaft and that the control handle has a further hub for receiving the first hub. A rotationally fixed connection between the control handle and the actuating shaft can thus be produced and assembled in a simple manner. Due to the pocket-shaped receiving area of the first hub, the housing part is essentially sealed off from the control unit after the insertion of a base body. The length of the pocket-shaped receiving area can be predetermined so that deviations in the position of the actuating shaft can be compensated. Deviations in the axial direction of the actuating shaft can be compensated for by moving the actuating shaft in the hub.

Es hat sich weiterhin als vorteilhaft herausgestellt, daß der Endabschnitt der Betätigungswelle abgeflacht ist und daß die erste und zweite Nabe jeweils entsprechend abgeflachte Bereiche aufweisen. Damit ergibt sich in besonders einfacher und sicherer Weise eine drehfeste Verbindung.It has also proven to be advantageous that the end section of the actuating shaft is flattened and that the first and second hubs each have correspondingly flattened areas. This results in a non-rotatable connection in a particularly simple and secure manner.

Es ist ferner vorteilhaft, daß der Grundkörper Durchbrüche zur Aufnahme von am Schaltgriff angebrachten Rasthaken aufweist. Damit kann in einfacher Weise die Flexibilität von Rasthaken erhöht werden. In weiterer Ausgestaltung der Erfindung weisen dabei der Grundkörper und der Schaltgriff jeweils drei Rasthaken auf. Dies ergibt eine einfache und sichere Herstellung derartiger Rastverbindungen.It is also advantageous that the base body has openings for receiving snap hooks attached to the control handle. The flexibility of locking hooks can thus be increased in a simple manner. In a further embodiment of the invention, the base body and the shift handle each have three locking hooks. This results in a simple and safe production of such snap connections.

Bei einer weiteren bevorzugten Ausführungsform weist der Schaltgriff einen hohlzylinderförmigen Abschnitt zur bereichsweisen Aufnahme des Grundkörpers auf. Damit kann nach dem Einsetzen eines Schaltgriffes in einen Grundkörper in optisch ansprechender und sicherer Weise ein Abschluß des Drehknopfes gegenüber dem Gehäuseteil und damit auch gegenüber dem Steuergerät sowie dessen elektrischen Steuerleitungen erreicht werden.In a further preferred embodiment, the control handle has a hollow cylindrical section for receiving the base body in regions. So that after inserting a control handle in a base body in a visually appealing and safe manner Completion of the rotary knob against the housing part and thus also against the control device and its electrical control lines can be achieved.

Eine vorteilhafte Ausgestaltung der Erfindung besteht darin, daß der Grundkörper und/oder der Schaltgriff einstückig ausgebildet sind. Sie sind dabei einfach aus Kunststoff, beispielsweise durch Spritzgießen, herstellbar.An advantageous embodiment of the invention is that the base body and / or the shift handle are integrally formed. They are easy to manufacture from plastic, for example by injection molding.

Ein Ausführungsbeispiel für einen erfindungsgemäßen Drehknopf ist nachfolgend anhand der Zeichnungen beschrieben. Es zeigen:

  • Fig. 1 einen Längsschnitt durch einen erfindungsgemäßen Grundkörper,
  • Fig. 2 eine Vorderansicht des Grundkörpers in Richtung A nach Fig. 1.
  • Fig. 3 einen Längsschnitt durch einen erfindungsgemäßen Schaltgriff,
  • Fig. 4 eine Vorderansicht des Schaltgriffes in Richtung B nach Figur 3 und
  • Fig. 5 einen Längsschnitt durch einen zusammengebauten Drehknopf.
An embodiment of a rotary knob according to the invention is described below with reference to the drawings. Show it:
  • 1 shows a longitudinal section through a base body according to the invention,
  • 2 is a front view of the base body in the direction A of FIG. 1st
  • 3 shows a longitudinal section through a control handle according to the invention,
  • Fig. 4 is a front view of the control handle in the direction B of Figure 3 and
  • Fig. 5 shows a longitudinal section through an assembled knob.

In eine Öffnung 1 eines teilweise dargestellten Gehäuseteils 3 ist, wie in Fig. 1 dargestellt, ein Grundkörper 5 eines insgesamt mit 7 bezeichneten (Fig. 5) Drehknopfes eingesetzt. Das Gehäuseteil 3 kann z.B. zu einer Frontwand eines Hausgerätes oder zu einem Bedienungspult gehören.In an opening 1 of a partially illustrated housing part 3, as shown in FIG. 1, a base body 5 of a rotary knob designated overall with 7 (FIG. 5) is inserted. The housing part 3 can e.g. belong to a front wall of a domestic appliance or to a control panel.

Der einstückig, z.B. durch Spritzgießen, aus Kunststoff herstellbare Grundkörper 5 hat eine sacklochförmig abgeschlossene erste Nabe 9 zur Aufnahme eines Endbereiches einer teilweise dargestellten Betätigungswelle 10 eines nicht dargestellten Steuergerätes, z.B. eines Programmsteuergerätes einer Wasch- oder Geschirrspülmaschine oder eines Drehschalters. Für eine drehfeste Verbindung mit der Betätigungswelle hat eine Nabenbohrung 11 einen abgeflachten Bereich 13, der einem gleichfalls abgeflachten Bereich 12 der Betätigungswelle 10 angepaßt ist. Um Herstellungs- bzw. Montageabweichungen betreffend die Lageanordnung der Betätigungswelle 10 auszugleichen, ist deren Endbereich in der als Aufnahmebereich der Nabe 9 ausgebildeten Nabenbohrung 11 in Achsrichtung verschiebbar angeordnet.The one-piece, e.g. by injection molding, plastic body 5 has a blind hole closed first hub 9 for receiving an end portion of a partially shown actuating shaft 10 of a control device, not shown, e.g. a program control unit of a washing machine or dishwasher or a rotary switch. For a rotationally fixed connection to the actuating shaft, a hub bore 11 has a flattened area 13 which is adapted to a likewise flattened area 12 of the actuating shaft 10. In order to compensate for manufacturing and / or assembly deviations with regard to the position arrangement of the actuating shaft 10, its end region is arranged in the hub bore 11, which is designed as the receiving region of the hub 9, and is displaceable in the axial direction.

Die Nabe 9 ist bei im wesentlichen gleicher Wandstärke auch betreffend ihre Mantelfläche mit einem abgeflachten Bereich 15 versehen.The hub 9 is also provided with a flattened area 15 with respect to its lateral surface with substantially the same wall thickness.

Von einem Mittenstück der Nabe 9 erstreckt sich radial auswärts und im wesentlichen senkrecht zu einer Mittelachse der Nabe 9 ein scheibenförmiges Zwischenstück 16. In dem Zwischenstück 16 sind mit gleichem Abstand zueinander drei segmentförmige Durchbrüche 17 ausgebildet. Radial auswärts von den Durchbrüchen 17 und im wesentlichen mit gleichem Abstand jeweils zu benachbarten Durchbrüchen 17 angeordnet, erstrecken sich von dem Zwischenstück 16 kragarmförmig drei Rasthaken 19. In dem vorliegenden Ausführungsbeispiel sind die drei Rasthaken 19 jeteils durch in axialer Richtung verlaufende Schlitze 20 von einem hohlzylinderförmigen Ansatz 22 mit gleichem Außen- und Innendurchmesser getrennt. Am freien Ende jedes Rasthakens 19 ist, in Längsrichtung und radial auswärts über den Ansatz 22 ragend, eine Rastnase 21 ausgebildet. Jeder der elastisch ausgebildeten Rasthaken 19 ist im Abstand zwischen zwei Längsrippen 23 angeordnet. Jede Längsrippe 23 ist benachbart einem Schlitz 20 an dem Ansatz 22 ausgebildet. Die Längsrippen 23 überragen den Ansatz 22 in radial auswärtiger Richtung entsprechend den Rastnasen 21. Jede Längsrippe 23 erstreckt sich dabei in Achsrichtung von dem Zwischenstück 16 und endet im Abstand von den Rastnasen 21, so daß zwischen einander gegenüberliegenden, im wesentlichen senkrecht zur Mittelachse der Nabe 9 stehenden Anlageflächen 25, 27 der Rastnasen 21 bzw. Längsrippen 23 ein Zwischenraum zur Aufnahme eines die Öffnung 1 begrenzenden Bereichs des Gehäuseteils 3 gebildet ist.A disk-shaped intermediate piece 16 extends radially outward from a central piece of the hub 9 and essentially perpendicular to a central axis of the hub 9. In the intermediate piece 16, three segment-shaped openings 17 are formed at the same distance from one another. Arranged radially outward from the openings 17 and essentially at the same distance from adjacent openings 17, three latching hooks 19 extend from the intermediate piece 16 in the form of a cantilever arm Approach 22 with the same outside and inside diameters separated. At the free end of each latching hook 19, a latching nose 21 is formed, projecting in the longitudinal direction and radially outward beyond the shoulder 22. Each of the elastic locking hooks 19 is arranged at a distance between two longitudinal ribs 23. Each longitudinal rib 23 is formed adjacent to a slot 20 on the neck 22. The longitudinal ribs 23 protrude beyond the shoulder 22 in the radially outward direction corresponding to the locking lugs 21. Each longitudinal rib 23 extends in the axial direction from the intermediate piece 16 and ends at a distance from the locking lugs 21, so that between each other, essentially perpendicular to the central axis of the hub 9 standing contact surfaces 25, 27 of the locking lugs 21 or longitudinal ribs 23, an intermediate space for receiving an area of the housing part 3 delimiting the opening 1 is formed.

Dadurch, daß nach Einsetzen des Grundkörpers 5 in die Öffnung 1 federnde Rastnasen 21 das Gehäuseteil 3 hintergreifen, ist ein unbeabsichtigtes Lösen des Grundkörpers 5 aus dem Gehäuseteil 3 verhindert. Eine Bewegung des Grundkörpers 5 in das Gehäuseteil 3 ist durch die einen Anschlag bildenden Längsrippen 23 verhindert. Eine Drehbeweglichkeit des Grundkörpers 5 in der Öffnung 1 ist dabei durch entsprechende Anpassung der radial äußeren Mantelflächen des Ansatzes 22 und der Rasthaken 19 an den Durchmesser der Öffnung 1 und entsprechend groß gewählten Abstand zwischen den Anlageflächen 25, 27 sichergestellt. Der zwischen den Anlageflächen 25, 27 liegende Bereich der Mantelflächen des Ansatzes 22 und der Rasthaken 19 bildet dabei ein Lagerstück gegenüber einer Innenwand der Öffnung 1. Sowohl während des Einbaus eines Grundkörpers 5 in ein Gehäuseteil 3 als auch während der Benutzung eines Drehknopfes 7 sind die einen Teil des Lagerstücks bildenden Bereiche der Rasthaken 19 vor übermäßiger Belastung durch die den anderen Teil des Lagerstücks bildenden Bereiche des Ansatzes 22 geschützt. Dabei ist zwischen Ansatz 22, Rasthaken 19 und Öffnung 1 ein Spiel so vorgebbar, daß Abweichungen betreffend die Lageanordnung der Öffnung 1 und der Betätigungswelle 10 des innerhalb des Gehäuseteils 3 fest angeordneten Steuergerätes über eine Lageänderung des Grundkörpers 5 in der Öffnung 1 ausgleichbar sind. Ein Ausgleich von Lageabweichungen in axialer Richtung ist dadurch möglich, daß, wie in Fig. 1 und Fig. 5 dargestellt, nach Verbindung des Grundkörpers 5 mit der Betätigungswelle 10 ein Abstand zwischen deren freiem Ende und dem Abschluß der Nabenbohrung 11 besteht und die Betätigungswelle 10 in der Nabenbohrung 11 verschiebbar aufgenommen ist.Characterized in that after inserting the base body 5 in the opening 1 resilient locking lugs 21 engage behind the housing part 3, an unintentional release of the base body 5 from the housing part 3 is prevented. A movement of the base body 5 into the housing part 3 is prevented by the longitudinal ribs 23 forming a stop. A Rotational mobility of the base body 5 in the opening 1 is ensured by appropriate adaptation of the radially outer lateral surfaces of the extension 22 and the locking hooks 19 to the diameter of the opening 1 and a correspondingly large distance between the contact surfaces 25, 27. The area between the contact surfaces 25, 27 of the lateral surfaces of the extension 22 and the latching hook 19 forms a bearing piece opposite an inner wall of the opening 1. Both during the installation of a base body 5 in a housing part 3 and during the use of a rotary knob 7 Areas of the locking hooks 19 forming part of the bearing piece are protected against excessive loading by the areas of the extension 22 forming the other part of the bearing piece. In this case, a play can be predetermined between shoulder 22, latching hook 19 and opening 1 in such a way that deviations regarding the positional arrangement of opening 1 and the actuating shaft 10 of the control device fixedly arranged within housing part 3 can be compensated for by changing the position of base body 5 in opening 1. A compensation of positional deviations in the axial direction is possible in that, as shown in FIGS. 1 and 5, after connecting the base body 5 to the actuating shaft 10, there is a distance between the free end and the end of the hub bore 11 and the actuating shaft 10 is slidably received in the hub bore 11.

Der Grundkörper 5 ist somit einfach über die die Rasthaken 19 und die Längsrippen 23 aufweisende, Rastverbindung mit dem Gehäuseteil 3 vor dem Einsetzen eines kompletten Drehknopfes 7 verbindbar. Dabei ist die Öffnung 1 mit Ausnahme der Durchbrüche 17 nach dem Einsetzen des Grundkörpers 5 gegenüber dem Inneren des Gehäuseteils 3 abgeschlossen.The base body 5 can thus be easily connected to the housing part 3 via the latching hook 19 and the longitudinal ribs 23 before the insertion of a complete rotary knob 7. The opening 1 is closed with the exception of the openings 17 after the insertion of the base body 5 with respect to the interior of the housing part 3.

In einem zweiten Schritt, z.B. nach einem Transport und vor einer Auslieferung, ist für die Fertigmontage eines Drehknopfes 7 ein in Fig. 3 und 4 einzeln und in Fig. 5 mit einem Grundkörper 5 zusammengebaut dargestellter Schaltgriff 29 in einen Grundkörper 5 einsetzbar. Der Schaltgriff 29 ist im wesentlichen topfförmig ausgebildet mit einem einseitig geschlossenen, hohlzylinderförmigen Abschnitt 31 zur bereichsweisen Aufnahme des Grundkörpers 5. Der Schaltgriff 29 kann unabhängig von dem Grundkörper 5 gestaltet werden; für eine gute Handhabbarkeit weist der hohlzylinderförmige Abschnitt 31 z.B. auf der Mantelfläche eine Riffelung 33 auf. Für eine drehfeste Verbindung zwischen Grundkörper 5 und Schaltgriff 29 ist an diesem eine zweite Nabe 35 ausgebildet, die zur Aufnahme der ersten Nabe 9 einen dieser angepaßten Querschnitt mit einem nach Innen und Außen abgeflachten Bereich 37 aufweist.In a second step, e.g. after transport and before delivery, for the final assembly of a rotary knob 7, a switching handle 29 shown in FIGS. 3 and 4 individually and assembled in FIG. 5 with a base body 5 can be inserted into a base body 5. The control handle 29 is essentially pot-shaped with a hollow cylindrical section 31 closed on one side for receiving the base body 5 in certain areas. The control handle 29 can be designed independently of the base body 5; for easy handling, the hollow cylindrical section 31 has e.g. a corrugation 33 on the lateral surface. For a rotationally fixed connection between the base body 5 and the shift handle 29, a second hub 35 is formed thereon, which has a cross section adapted to the first hub 9 with a region 37 flattened inwards and outwards.

Weiterhin sind an dem Schaltgriff 29 zur Verbindung mit dem Grundkörper 5 drei sich in Längsrichtung parallel zu der zweiten Nabe 35 und über diese hinaus erstreckende Rasthaken 39 ausgebildet, die zum Befestigen durch die Durchbrüche 17 geführt werden können. Sie hintergreifen dann, wie in Fig. 5 dargestellt, das Zwischenstück 16 und bilden eine Rastverbindung. Um den Schaltgriff 29 in axialer Richtung festzulegen und sicherzustellen, daß im eingebauten Zustand ein Abstand gegenüber der Außenfläche des Gehäuseteils 3 vorhanden ist, sind an dem Schaltgriff 29 radial auswärts zu der zweiten Nabe 35 sich parallel zu dieser erstreckende Vorsprünge 41 ausgebildet, die einen Anschlag für das Zwischenstück 16 bilden. Der Drehknopf 7 ist somit drehbar, ohne daß es zu einer Berührung zwischen Schaltgriff 29 und Gehäuseteil 3 und somit zu einer Beeinträchtigung der Funktion des Schaltgriffes kommen kann.Furthermore, three locking hooks 39, which extend in the longitudinal direction parallel to the second hub 35 and extend beyond it, are formed on the switching handle 29 for connection to the base body 5 and can be guided through the openings 17 for fastening. Then, as shown in FIG. 5, they engage behind the intermediate piece 16 and form a latching connection. In order to fix the control handle 29 in the axial direction and to ensure that there is a distance from the outer surface of the housing part 3 in the installed state, projections 41 are formed on the control handle 29, radially outward to the second hub 35, which extend parallel to the latter and which act as a stop form for the intermediate piece 16. The rotary knob 7 can thus be rotated without there being any contact between the control handle 29 and the housing part 3 and thus an impairment of the function of the control handle.

Die eine Rastverbindung mit den Rasthaken 19 zùr Befestigung des Grundkörpers 5 am Gehäuseteil 3 kann z.B. durch gegenüber den Rasthaken 39 der anderen Rastverbindung versteifte Rasthaken 19 so ausgebildet sein, daß sie schwerer lösbar ist als die andere Rastverbindung mit den Rasthaken 39. Zum Lösen aufgebrachte Kräfte führen dann zunächst zu einem Abnehmen des Schaltgriffs 29. In diesem Zustand bleibt das elektrische Anschlüsse beinhaltende Innere des Gehäuseteils 3 gegenüber unerlaubtem Zugriff weitgehend durch den Grundkörper 5 verschlossen.The one snap connection with the snap hooks 19 for fastening the base body 5 to the housing part 3 can e.g. by means of latching hooks 19 stiffened with respect to the latching hooks 39 of the other latching connection so that it is more difficult to release than the other latching connection with the latching hooks 39. For releasing forces then first lead to a removal of the control handle 29. The electrical connections remain in this state Containing interior of the housing part 3 largely closed against unauthorized access by the base body 5.

Claims (8)

  1. A rotary knob (7), mounted in a housing opening (1), for a control apparatus with a base body (5), which is connected securely with respect to torsion with an actuating shaft (10) of the control apparatus, and with a switching knob (29), which is connected via a detent connection (17, 39) with the base body (5) securely with respect to torsion, characterised in that the base body (5) is provided with detent hooks (19), which penetrate the housing opening (1) and the detent noses (21) of which with stops (23) of the base body (5) form a mounting for the housing parts (3) delimiting the opening (1).
  2. A rotary knob according to Claim 1, characterised in that the base body (5) has a first hub (9) with a receiving region (11) in the form of a blind bore to receive an end section of the actuating shaft (10) and that the switching knob has a further hub (35) to receive the first hub (9).
  3. A rotary knob according to Claim 2, characterised in that the end section of the actuating shaft (10) is flattened and that the first and second hub (9, 35) in each case have correspondingly flattened regions (13, 37).
  4. A rotary knob according to one of Claims 1 to 3, characterised in that the base body (5) has perforations (17) to receive detent hooks (39) arranged on the switching knob (29).
  5. A rotary knob according to one of Claims 1 to 4, characterised in that the base body (5) and the switching knob (29) in each case have three detent hooks (19, 39).
  6. A rotary knob according to one of Claims 1 to 5, characterised in that the base body (5) and/or the switching knob (29) are constructed in one piece.
  7. A rotary knob according to one of Claims 1 to 6, characterised in that the switching knob (29) has a section (31) in the form of a hollow cylinder to receive, in parts, the base body (5).
  8. A rotary knob according to one of Claims 1 to 6, characterised in that the switching knob (29) has projections (41) running radially outside its hub (35) parallel to the hub (35), which projections form a stop for the base body (5) and ensure a spacing with respect to the outer surface of the housing part (3).
EP89200196A 1988-02-05 1989-01-31 Turning knob for a control device or the like Expired - Lifetime EP0327175B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3803356 1988-02-05
DE3803356A DE3803356A1 (en) 1988-02-05 1988-02-05 CONTROL KNOB FOR CONTROL UNITS OR THE LIKE

Publications (2)

Publication Number Publication Date
EP0327175A1 EP0327175A1 (en) 1989-08-09
EP0327175B1 true EP0327175B1 (en) 1993-09-29

Family

ID=6346639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89200196A Expired - Lifetime EP0327175B1 (en) 1988-02-05 1989-01-31 Turning knob for a control device or the like

Country Status (4)

Country Link
US (1) US4920823A (en)
EP (1) EP0327175B1 (en)
JP (1) JPH01226016A (en)
DE (2) DE3803356A1 (en)

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Also Published As

Publication number Publication date
JPH01226016A (en) 1989-09-08
EP0327175A1 (en) 1989-08-09
DE3803356A1 (en) 1989-08-17
US4920823A (en) 1990-05-01
DE58905715D1 (en) 1993-11-04

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