EP0325717A2 - Switch with metal case particularly for motor-vehicles - Google Patents

Switch with metal case particularly for motor-vehicles Download PDF

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Publication number
EP0325717A2
EP0325717A2 EP88119261A EP88119261A EP0325717A2 EP 0325717 A2 EP0325717 A2 EP 0325717A2 EP 88119261 A EP88119261 A EP 88119261A EP 88119261 A EP88119261 A EP 88119261A EP 0325717 A2 EP0325717 A2 EP 0325717A2
Authority
EP
European Patent Office
Prior art keywords
base
die
switch
circumference
cast housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88119261A
Other languages
German (de)
French (fr)
Other versions
EP0325717A3 (en
Inventor
Günter Merten
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.)
Merit-Elektrik GmbH
Merit Elektrik GmbH
Original Assignee
Merit-Elektrik GmbH
Merit Elektrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merit-Elektrik GmbH, Merit Elektrik GmbH filed Critical Merit-Elektrik GmbH
Publication of EP0325717A2 publication Critical patent/EP0325717A2/en
Publication of EP0325717A3 publication Critical patent/EP0325717A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers

Definitions

  • the invention relates to a switch according to the preamble of claim 1, which is particularly suitable as a reversing switch, gear switch, temperature switch or the like for motor vehicles.
  • Such switches with a die-cast housing are used, for example, as reversing switches in motor vehicles.
  • the zinc die-casting from which the die-cast housing usually consists, yields at higher temperatures, so that the smooth cylindrical plastic base secured only by the end peripheral lip in the die-cast housing can easily be released from its attachment to the die-cast housing.
  • the invention has for its object to improve in a switch according to the preamble of claim 1, the attachment of the plastic base in the die-cast housing in a simple manner and to make it so secure that the base can not change its position in the die-cast housing even at higher temperatures.
  • impressions or indentations can be easily pressed in from the outside at the appropriate places after inserting the plastic base into the die-cast housing and pressing the peripheral lip of the cylindrical sleeve against an inclined surface on the base circumference, which gives the base a hold, so that they engage under the circumferential retaining flange protruding radially outwards from the plastic base and in this way ensure that the plastic base with its retaining flange is securely held in the annular recess on the die-cast housing and cannot be pressed outward from the die-cast housing even at higher temperatures.
  • the plastic base in the die-cast housing is particularly well secured when four indentations or indentations are distributed over the circumference of the flange at equal intervals of 90 °, the indentations or indentations for a switch in which the die-cast housing has a hexagonal Screw head is formed, are arranged on the die-cast housing advantageously at the transition from the hexagon screw head to the cylindrical sleeve offset therefrom with the conically tapered lip portion.
  • the inclined surface on which the circumferential lip is held is advantageously a conical extension on the circumference of the base.
  • the switch 1 which is used in particular as a reversing switch for motor vehicles, has a base 2 made of plastic, which is fastened in a die-cast housing 3 with a cylindrical recess 4. At the end of the die-cast housing 3 there is a cylindrical sleeve 5 with a circumferential lip 6 which is pressed conically against the circumference of the base 2 and normally secures the plastic base in the die-cast housing 3 against unintentional loosening.
  • a circumferential retaining flange 7 protrudes from the circumference of the base 2, which is held in a corresponding cylindrical recess 4 on the die-cast housing 3, and the base 2 has a conical extension on the base circumference 1a with a externally directed inclined surface 10 on which the peripheral lip 6 rests and finds a hold.
  • At least two, preferably three or four indentations or notches 8 are also provided on the die-cast housing 3, which are arranged distributed over the circumference of the holding flange 7 and securely engage under the holding flange on the flange side 7a facing the circumferential lip 6.
  • a total of four such impressions or notches 8 are arranged on the die-cast housing 3 over the circumference of the holding flange 7 at equal intervals of 90 ° each, at the transition from the hexagon screw head 9 of the die-cast housing 3 to the cylindrical one offset therefrom Sleeve 5 with the conically tapered end lip section 6.

Landscapes

  • Motor Or Generator Frames (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • General Details Of Gearings (AREA)

Abstract

Switches with a metal case and a plastic base are used as reversing switches, transmission switches, temperature switches or the like, especially in the case of motor vehicles. However, the die-cast zinc of which the switch case normally consists becomes flexible at relatively high temperatures so that the smooth cylindrical plastic base, which is secured only by means of a circumferential lip on the end in the die-cast case, can be detached from its mounting on the die-cast case. According to the invention, this is avoided in a particularly simple manner in that the base (2) of the switch (1) has an outwardly projecting retaining flange (7), in that the circumferential lip (6) rests on an oblique surface (10) of the base, directed outwards from the base (2), and in that on the sleeve (5) surrounding the base (2) there are arranged at least two, preferably three or four, indentations or notches (8), distributed around the circumference of the retaining flange (7), which grip under the retaining flange (7) on the flange side facing the circumferential lip (6) in a securing manner. <IMAGE>

Description

Die Erfindung betrifft einen Schalter nach dem Oberbegriff des Anspruches 1, der insbesondere als Rückfahrschalter, Getriebeschalter, Temperaturschalter oder dergleichen für Kraftfahrzeuge geeignet ist.The invention relates to a switch according to the preamble of claim 1, which is particularly suitable as a reversing switch, gear switch, temperature switch or the like for motor vehicles.

Derartige Schalter mit einem Druckgußgehäuse werden bei­spielsweise als Rückfahrschalter bei Kraftfahrzeugen ein­gesetzt.Such switches with a die-cast housing are used, for example, as reversing switches in motor vehicles.

Der Zink-Druckguß, aus dem das Druckgußgehäuse üblicher­weise besteht, gibt jedoch bei höheren Temperaturen nach, so daß der lediglich durch die endseitige Umfangslippe in dem Druckgußgehäuse gesicherte glatte zylindrische Kunst­stoffsockel sich aus seiner Befestigung an dem Druckguß­gehäuse leicht lösen kann.The zinc die-casting, from which the die-cast housing usually consists, yields at higher temperatures, so that the smooth cylindrical plastic base secured only by the end peripheral lip in the die-cast housing can easily be released from its attachment to the die-cast housing.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Schal­ter nach dem Oberbegriff des Anspruches 1 die Befestigung des Kunststoffsockels in dem Druckgußgehäuse in einfacher Weise zu verbessern und so sicher zu gestalten, daß der Sockel auch bei höheren Temperaturen seine Lage in dem Druckgußgehäuse nicht verändern kann.The invention has for its object to improve in a switch according to the preamble of claim 1, the attachment of the plastic base in the die-cast housing in a simple manner and to make it so secure that the base can not change its position in the die-cast housing even at higher temperatures.

Diese Aufgabe wird erfindungsgemäß durch den Kennzeich­nungsteil des Anspruches 1 gelöst, während in den Ansprü­chen 2 bis 4 besonders vorteilhafte Weiterbildungen der Erfindung gekennzeichnet sind.This object is achieved according to the invention by the characterizing part of claim 1, while particularly advantageous developments of the invention are characterized in claims 2 to 4.

Die Einprägungen oder Einkerbungen können nach dem Einset­zen des Kunststoffsockels in das Druckgußgehäuse und dem Andrücken der Umfangslippe der zylindrischen Hülse gegen eine schräge Fläche am Sockelumfang, die dem Sockel einen Halt gibt, an den dafür geeigneten Stellen in einfacher Weise von außen eingedrückt werden, so daß sie den von dem Kunststoffsockel radial nach außen hervorstehenden umlau­fenden Halteflansch untergreifen und auf diese Weise si­cherstellen, daß der Kunststoffsockel mit seinem Halte­flansch in der ringförmigen Aussparung an dem Druckgußge­häuse sicher festgehalten wird und auch bei höheren Tempe­raturen nicht aus dem Druckgußgehäuse nach außen herausge­drückt werden kann.The impressions or indentations can be easily pressed in from the outside at the appropriate places after inserting the plastic base into the die-cast housing and pressing the peripheral lip of the cylindrical sleeve against an inclined surface on the base circumference, which gives the base a hold, so that they engage under the circumferential retaining flange protruding radially outwards from the plastic base and in this way ensure that the plastic base with its retaining flange is securely held in the annular recess on the die-cast housing and cannot be pressed outward from the die-cast housing even at higher temperatures.

Eine besonders gute Sicherung des Kunststoffsockels in dem Druckgußgehäuse ergibt sich, wenn vier Einprägungen oder Einkerbungen über den Umfang des Flansches in gleichen Ab­ständen von jeweils 90° verteilt angeordnet sind, wobei die Einprägungen oder Einkerbungen bei einem Schalter, bei dem das Druckgußgehäuse mit einem Sechskant-Schraubenkopf ausgebildet ist, an dem Druckgußgehäuse vorteilhafterweise am Übergang von dem Sechskant-Schraubenkopf zu der davon abgesetzten zylindrischen Hülse mit dem konisch verjüngten Lippenabschnitt angeordnet sind. Die schräge Fläche, an der die Umfangslippe einen Halt findet, ist vorteilhafter­weise eine konische Erweiterung am Sockelumfang.The plastic base in the die-cast housing is particularly well secured when four indentations or indentations are distributed over the circumference of the flange at equal intervals of 90 °, the indentations or indentations for a switch in which the die-cast housing has a hexagonal Screw head is formed, are arranged on the die-cast housing advantageously at the transition from the hexagon screw head to the cylindrical sleeve offset therefrom with the conically tapered lip portion. The inclined surface on which the circumferential lip is held is advantageously a conical extension on the circumference of the base.

Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt. Es zeigen

  • Fig. 1 einen Rückfahrschalter für Kraftfahrzeuge in ei­ner Seitenansicht und
  • Fig. 2 eine gegenüber Fig. 1 vergrößerte Teildarstel­lung eines solchen Schalters teilweise aufge­schnitten.
A preferred embodiment of the invention is shown schematically in the drawing. Show it
  • Fig. 1 shows a reversing switch for motor vehicles in a side view
  • Fig. 2 is a partially enlarged view of FIG. 1 of such a switch partially cut away.

Der Schalter 1, der insbesondere als Rückfahrschalter für Kraftfahrzeuge dient, hat einen Sockel 2 aus Kunststoff, der in einem Druckgußgehäuse 3 mit einer zylindrischen Aussparung 4 befestigt ist. Von dem Druckgußgehäuse 3 steht endseitig eine zylindrische Hülse 5 mit einer Um­fangslippe 6 hervor, die gegen den Umfang des Sockels 2 konisch angedrückt ist und den Kunststoffsockel normaler­weise in dem Druckgußgehäuse 3 gegen unbeabsichtigtes Lö­sen sichert.The switch 1, which is used in particular as a reversing switch for motor vehicles, has a base 2 made of plastic, which is fastened in a die-cast housing 3 with a cylindrical recess 4. At the end of the die-cast housing 3 there is a cylindrical sleeve 5 with a circumferential lip 6 which is pressed conically against the circumference of the base 2 and normally secures the plastic base in the die-cast housing 3 against unintentional loosening.

Zusätzlich zu der am Sockelumfang anliegenden Umfangslippe 6 steht vom Umfang des Sockels 2 ein umlaufender Halte­flansch 7 nach außen hervor, der in einer entsprechenden zylindrischen Aussparung 4 an dem Druckgußgehäuse 3 gehal­ten ist, und der Sockel 2 hat eine konische Erweiterung am Sockelumfang 1a mit einer nach außen gerichteten schrägen Fläche 10, an der die Umfangslippe 6 anliegt und Halt findet.In addition to the circumferential lip 6 lying against the base circumference, a circumferential retaining flange 7 protrudes from the circumference of the base 2, which is held in a corresponding cylindrical recess 4 on the die-cast housing 3, and the base 2 has a conical extension on the base circumference 1a with a externally directed inclined surface 10 on which the peripheral lip 6 rests and finds a hold.

An dem Druckgußgehäuse 3 sind außerdem mindestens zwei, vorzugsweise drei oder vier Einprägungen oder Einkerbungen 8 vorgesehen, die über den Umfang des Halteflansches 7 verteilt angeordnet sind und den Halteflansch an der der Umfangslippe 6 zugewandten Flanschseite 7a sichernd unter­greifen.At least two, preferably three or four indentations or notches 8 are also provided on the die-cast housing 3, which are arranged distributed over the circumference of the holding flange 7 and securely engage under the holding flange on the flange side 7a facing the circumferential lip 6.

Bei dem gezeigten Ausführungsbeispiel sind insgesamt vier derartige Einprägungen oder Einkerbungen 8 an dem Druck­gußgehäuse 3 über den Umfang des Halteflansches 7 in glei­chen Abständen von jeweils 90° verteilt angeordnet, und zwar am Übergang von dem Sechskant-Schraubenkopf 9 des Druckgußgehäuses 3 zu der davon abgesetzten zylindrischen Hülse 5 mit dem konisch verjüngten endseitigen Lippenab­schnitt 6.In the exemplary embodiment shown, a total of four such impressions or notches 8 are arranged on the die-cast housing 3 over the circumference of the holding flange 7 at equal intervals of 90 ° each, at the transition from the hexagon screw head 9 of the die-cast housing 3 to the cylindrical one offset therefrom Sleeve 5 with the conically tapered end lip section 6.

Claims (4)

1. Schalter mit Metallgehäuse, insbesondere Rückfahr­schalter, Getriebeschalter, Temperaturschalter oder dergleichen für Kraftfahrzeuge, mit einem Sockel aus Kunststoff, der in einem Druckgußgehäuse mit einer zylindrischen Aussparung für den Sockel und einer von dem Druckgußgehäuse endseitig hervorstehenden zylin­drischen Hülse zusätzlich befestigt ist, die eine ge­gen den Sockelumfang konisch angedrückte Umfangslippe aufweist, dadurch gekennzeich­net, daß der Sockel (2) des Schalters (1) einen nach außen hervorstehenden Halteflansch (7) aufweist, daß die Umfangslippe (6) an einer vom Sockel (2) nach außen gerichteten schrägen Fläche (10) des Sockels (2) anliegt, und daß an der den Sockel (2) umgebenden Hülse (5) mindestens zwei, vorzugsweise drei oder vier Einprägungen oder Einkerbungen (8) über den Um­fang des Halteflansches (7) verteilt angeordnet sind, die den Halteflansch (7) an der der Umfangslippe (6) zugewandten Flanschseite sichernd untergreifen.1. Switch with metal housing, in particular reversing switch, gear switch, temperature switch or the like for motor vehicles, with a base made of plastic, which is additionally fastened in a die-cast housing with a cylindrical recess for the base and a cylindrical sleeve protruding from the end of the die-cast housing the base circumference has a conically pressed circumferential lip, characterized in that the base (2) of the switch (1) has an outwardly projecting retaining flange (7), that the circumferential lip (6) on an inclined surface (4) directed outwards from the base (2) 10) of the base (2), and that on the sleeve (5) surrounding the base (2) at least two, preferably three or four impressions or notches (8) are distributed over the circumference of the holding flange (7), which the Reach securely under the retaining flange (7) on the flange side facing the peripheral lip (6). 2. Schalter nach Anspruch 1, dadurch ge­kennzeichnet, daß vier Einprägungen oder Einkerbungen (8) über den Umfang des Halteflansches (7) in gleichen Abständen von jeweils 90° verteilt angeordnet sind.2. Switch according to claim 1, characterized in that four impressions or notches (8) over the circumference of the holding flange (7) are arranged at equal intervals of 90 °. 3. Schalter nach Anspruch 1 oder 2, bei dem das Druck­gußgehäuse mit einem Sechskant-Schraubenkopf ausge­bildet ist, dadurch gekennzeich­net, daß die Einprägungen oder Einkerbungen (8) an dem Druckgußgehäuse (3) am Übergang von dem Sechs­kant-Schraubenkopf (9) zu der davon abgesetzten Hülse (5) angeordnet sind.3. Switch according to claim 1 or 2, wherein the die-cast housing is formed with a hexagon screw head, characterized in that the indentations or notches (8) on the die-cast housing (3) at the transition from the hexagon screw head (9) to the offset sleeve (5) are arranged. 4. Schalter nach Anspruch 1, dadurch ge­kennzeichnet, daß die schräge Fläche (10) eine konische Erweiterung am Sockelumfang ist.4. Switch according to claim 1, characterized in that the inclined surface (10) is a conical extension on the circumference of the base.
EP88119261A 1988-01-27 1988-11-19 Switch with metal case particularly for motor-vehicles Withdrawn EP0325717A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8800927U 1988-01-27
DE8800927U DE8800927U1 (en) 1988-01-27 1988-01-27 Switches with metal housing, especially for motor vehicles

Publications (2)

Publication Number Publication Date
EP0325717A2 true EP0325717A2 (en) 1989-08-02
EP0325717A3 EP0325717A3 (en) 1989-10-18

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Family Applications (1)

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EP88119261A Withdrawn EP0325717A3 (en) 1988-01-27 1988-11-19 Switch with metal case particularly for motor-vehicles

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EP (1) EP0325717A3 (en)
DE (1) DE8800927U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007037759A1 (en) 2007-08-10 2009-02-12 Schaeffler Kg Device for determining a switching position of a mechanical system
DE102008037179A1 (en) 2008-08-09 2010-02-11 Schaeffler Kg Position detecting device for automatic transmission in motor vehicle, has locking bolt acting on bistable element and transferring movement to movable element of electrical contact, where damping system is provided in movable element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8904332U1 (en) * 1989-04-07 1989-06-22 Marquardt GmbH, 7207 Rietheim-Weilheim Electrical switch

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275556A (en) * 1940-08-26 1942-03-10 Gen Motors Corp Switch
DE1705120U (en) * 1952-12-15 1955-08-18 Bosch Gmbh Robert PRESSURE-ACTUATED SWITCH FOR ELECTRICAL CIRCUITS.
FR1207546A (en) * 1958-06-26 1960-02-17 Jaeger Ets Ed Improvements to pressure sensitive contactors
US3372372A (en) * 1965-03-31 1968-03-05 Medallion Instr Inc Automobile deceleration signal switching circuit
DE1279805B (en) * 1964-12-15 1968-10-10 Bosch Gmbh Robert Pressure medium operated small switch
DE1690499B2 (en) * 1967-08-26 1973-06-07 Westfälische Metall Industrie KG, Hueck & Co, 4780 Lippstadt ELECTRIC SWITCH FOR MOTOR VEHICLES
DE2600599B2 (en) * 1976-01-09 1978-01-26 Behr-Thomson Dehnstoffregler Gmbh, 7014 Kornwestheim TEMPERATURE DEPENDENT SWITCHING DEVICE
DE3540458A1 (en) * 1985-11-14 1987-05-21 Behr Thomson Dehnstoffregler ELECTRICAL SWITCHGEAR

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7730977U1 (en) * 1977-10-07 1982-06-09 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Unit made up of two housing parts
DE2902117B1 (en) * 1979-01-19 1980-01-17 Weber Ag Fab Elektro Process for producing a tensile connection of an outer housing wall of a device consisting of thermoplastic material with an inner device part and switch, the upper housing part of which is connected to the housing floor by this method
DE8223377U1 (en) * 1982-08-19 1982-10-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Snap-on auxiliary switch
DE8500845U1 (en) * 1985-01-15 1985-04-18 Siemens AG, 1000 Berlin und 8000 München Cover cap for an electrical switch

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275556A (en) * 1940-08-26 1942-03-10 Gen Motors Corp Switch
DE1705120U (en) * 1952-12-15 1955-08-18 Bosch Gmbh Robert PRESSURE-ACTUATED SWITCH FOR ELECTRICAL CIRCUITS.
FR1207546A (en) * 1958-06-26 1960-02-17 Jaeger Ets Ed Improvements to pressure sensitive contactors
DE1279805B (en) * 1964-12-15 1968-10-10 Bosch Gmbh Robert Pressure medium operated small switch
US3372372A (en) * 1965-03-31 1968-03-05 Medallion Instr Inc Automobile deceleration signal switching circuit
DE1690499B2 (en) * 1967-08-26 1973-06-07 Westfälische Metall Industrie KG, Hueck & Co, 4780 Lippstadt ELECTRIC SWITCH FOR MOTOR VEHICLES
DE2600599B2 (en) * 1976-01-09 1978-01-26 Behr-Thomson Dehnstoffregler Gmbh, 7014 Kornwestheim TEMPERATURE DEPENDENT SWITCHING DEVICE
DE3540458A1 (en) * 1985-11-14 1987-05-21 Behr Thomson Dehnstoffregler ELECTRICAL SWITCHGEAR

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007037759A1 (en) 2007-08-10 2009-02-12 Schaeffler Kg Device for determining a switching position of a mechanical system
DE102008037179A1 (en) 2008-08-09 2010-02-11 Schaeffler Kg Position detecting device for automatic transmission in motor vehicle, has locking bolt acting on bistable element and transferring movement to movable element of electrical contact, where damping system is provided in movable element

Also Published As

Publication number Publication date
DE8800927U1 (en) 1988-12-22
EP0325717A3 (en) 1989-10-18

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