EP0399988B1 - Snap detent device - Google Patents

Snap detent device Download PDF

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Publication number
EP0399988B1
EP0399988B1 EP90890104A EP90890104A EP0399988B1 EP 0399988 B1 EP0399988 B1 EP 0399988B1 EP 90890104 A EP90890104 A EP 90890104A EP 90890104 A EP90890104 A EP 90890104A EP 0399988 B1 EP0399988 B1 EP 0399988B1
Authority
EP
European Patent Office
Prior art keywords
driver ring
driver
ring
detent device
switch
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
EP90890104A
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German (de)
French (fr)
Other versions
EP0399988A2 (en
EP0399988A3 (en
Inventor
Alsch Ing. Gottfried
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Individual
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Individual
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Publication date
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Publication of EP0399988A2 publication Critical patent/EP0399988A2/en
Publication of EP0399988A3 publication Critical patent/EP0399988A3/en
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Publication of EP0399988B1 publication Critical patent/EP0399988B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00Switches 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
    • H01H19/02Details
    • H01H19/10Movable parts; Contacts mounted thereon
    • H01H19/20Driving mechanisms allowing angular displacement of the operating part to be effective in either direction
    • H01H19/24Driving mechanisms allowing angular displacement of the operating part to be effective in either direction acting with snap action
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00Switches 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
    • H01H19/02Details
    • H01H19/10Movable parts; Contacts mounted thereon
    • H01H19/11Movable parts; Contacts mounted thereon with indexing means
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/15Intermittent grip type mechanical movement
    • Y10T74/1526Oscillation or reciprocation to intermittent unidirectional motion
    • Y10T74/1553Lever actuator
    • Y10T74/1555Rotary driven element

Definitions

  • the invention relates to a snap mechanism for rotary switches with more than two locking positions, in which the drive shaft can be rotated against the force of an energy accumulator and the locking position is assumed with at least partial relaxation of the energy accumulator, the energy accumulator being formed by at least one axially acting compression spring and one in In the circumferential direction, the driving ring having inclined surfaces is acted upon, which driving ring interacts with a further driving ring which has a corresponding counter profile with inclined surfaces and can be coupled to the switch shaft.
  • DE-C 524 332 shows an electrical installation switch of the type mentioned at the outset, the aim of which was always to ensure safe lifting under spring pressure standing lock washer and to achieve a smooth and smooth gear of the switch.
  • both the locking disk and a locking bracket interacting with it are designed with mutually complementary catches.
  • a latching mechanism for switches is also known, in which or the like between one with a handle. connected drive shaft and a control device controlling the contact actuations, a clutch is provided.
  • a drive-side coupling half of this coupling which is connected in a rotationally fixed manner to the drive shaft, comprises a disk-shaped part with one or the like in the handle.
  • This hollow cylindrical approach is surrounded by a spiral spring serving as an energy store, which is inserted under pretension and protrudes with its ends bent inwards in the radial direction into a recess formed in both approaches.
  • a spiral spring serving as an energy store
  • the side walls of the recess of both lugs are aligned in a plane running through the axis of rotation.
  • the coupling half on the output side has a hub with external toothing, which ensures that a disc-shaped intermediate ratchet, which has ratchet teeth for opposite directions of rotation on its two end faces, is entrained in rotation.
  • the intermediate ratchet interacts to form an inhibiting device on the one hand with a ratchet disc held in the housing of the locking mechanism in a rotationally fixed and non-displaceable manner and on the other hand with a ratchet disc which is non-rotatable but is axially displaceable in the grooves of the rear housing shell of the locking mechanism and is pressed resiliently against the clutch half on the output side.
  • a ratchet disc which is non-rotatable but is axially displaceable in the grooves of the rear housing shell of the locking mechanism and is pressed resiliently against the clutch half on the output side.
  • To control the inhibiting device are used axially displaceably arranged in bores of the output side coupling half Pins which rest at one end on the control cam and at the other end on the non-rotatable and axially displaceable, spring-loaded ratchet disc and which can also be brought to bear on the intermediate ratchet with shoulders.
  • the design of the energy accumulator as a spiral spring has certain disadvantages, since on the one hand the spring windings should come into contact with the surrounding wall parts of the catch mechanism or switch housing as little or not at all, so that the speed of the contact movement is not undesirably influenced , and on the other hand the points of attack of the spring ends on the assigned parts of the locking mechanism, which for reasons of weight, insulation and corrosion practically always consist of plastic, are critical with regard to the service life of the switch.
  • the invention aims to provide a snap mechanism of the type mentioned, in which the speed of the contact movement during a switching process is independent of the actuation speed of the drive shaft and other influences and which is a type of power transmission between the energy accumulator and the favorable for the service life has associated parts of the rest mechanism and at which prevents accidental overturning of locking positions by turning the switch handle too quickly or exerting excessive torque on it.
  • the snap-action mechanism essentially consists in that a coupling for dragging is provided between the two driver rings, that the driver-side driver ring carries stops which cooperate with counter-stops fixed to the housing when a snap position of the catch mechanism is reached and block a further movement of the driver ring that at least one ring-shaped link is provided, which has saw teeth on its end faces in the circumferential direction, mutually oppositely inclined and cooperates with corresponding counter profiles on the handle-side driver ring or in the housing, and that the switch-side driver ring with knobs, radial ribs or the like. or recesses and / or radial grooves is formed, which cooperate with complementary profiles of the housing.
  • the energy accumulator is formed by at least one axially acting compression spring, a high force can be stored with small-sized springs, and in particular an embodiment is possible in which even if a spring breaks, the function of the locking mechanism is not significantly impaired.
  • the energy storage by compression of such a compression spring also allows constructions in which the stored force is brought to effect over a much larger radius and distributed over the circumference of the driven driving ring, this type of force absorption being considerably cheaper than the force which can be absorbed in the case of a flat spiral spring , which is always brought into effect at least at one end of the flat spiral spring near the axis and thus via an unfavorable lever arm.
  • the driver-side driver ring which is coupled in a rotationally fixed manner to the drive shaft, it can act, for example, on compression springs forming the force accumulator several places on the circumference of this driver ring, are applied, which results in a particularly favorable force absorption with small-sized springs.
  • such a design enables a protected arrangement of the springs in the wall of the housing of the snap-action mechanism.
  • the coupling proposed according to the invention for entrained entrainment between the two driver rings ensures that the switch elements are initiated when the switch handle rotates from one latching position to the next over the greater part of the path and the energy accumulator is tensioned accordingly. Due to the interaction of the stops of the handle-side driver ring with the counter-stops fixed to the housing, the turning of the switch handle is momentarily blocked when the catch mechanism is in the snap position, and overturning of the switch handle to the next following stop position is largely prevented, since the person operating the switch also feels the instantaneous resistance. that it has twisted the switch handle sufficiently for the intended switching operation.
  • a relief of the inclined surfaces of the driver rings upon exact blocking of the path of the driver rings upon reaching the switching position is achieved according to the invention in that at least one annular link is provided which has saw teeth on its end faces which extend in the circumferential direction and are oppositely inclined to one another and with corresponding counter profiles on the driver side driver ring or interacts in the housing.
  • the driver-side driver ring with knobs, radial ribs or the like. or recesses and / or radial grooves is formed, which cooperate with complementary profiles of the housing.
  • the stops fixed to the housing are preferably pivotally mounted.
  • the design can hiebei one on the outer circumference of the corresponding pawl on the handle-side driving ring. With a snap mechanism that is effective in both directions of rotation, at least one such pawl must then be provided for each direction of rotation.
  • a favorable embodiment of a snap-action mechanism that is effective in both directions of rotation consists in that the stops on the handle-side driver ring are formed by radial ribs, which interact with pivotable stop rockers mounted in the housing.
  • the stop rockers are pivotable about radial axes to the axis of rotation of the locking mechanism and are pivoted by the radial ribs of the handle-side driving ring when it rotates depending on the direction of rotation in the position required for achieving a secure stop.
  • the handle-side driver ring When the handle-side driver ring is turned, its radial ribs run against the end faces of the stop rockers, as a result of which the handle-side driver ring and the switch handle are stopped until the switch element has independently followed this position; the radial ribs of the driver ring on the handle side then come out of the engagement area of the stop rockers and this driver ring and the switch handle are released for a next step.
  • the stop rockers can be accommodated on the inner end face of the housing without any significant volume requirement.
  • the stop rockers expediently extend in the circumferential direction over a length which is greater than the distance, measured at the same radius, of the radial ribs of the driver ring on the handle side. As a result, the stop rockers are brought into a pivoting position by the radial ribs when they move against the force of the energy accumulator, which ensures a secure stop for the radial rib which follows in the direction of rotation.
  • the inclined surfaces of the driver-side driver ring and the inclined surfaces of the switch-side driver ring which interact with these inclined surfaces are each inclined in opposite directions to one another in the same way.
  • the twisting forces to be applied on the handle side are the same for the purpose of storing force in opposite directions of rotation.
  • the inclined surfaces of the interacting driver rings are not moved beyond the highest point of the inclined surfaces and thus the same surface pairs of the two driver rings always come into contact with one another.
  • the switch drive When equipping a switch with various types of switch elements, such as break contacts, make contacts or change-over contacts, the switch drive has different torque loads.
  • a relief of the inclined surfaces of the driving rings can be further improved in that the annular link is arranged concentrically to the inclined surfaces of the driving rings and that the link on the side facing the handle-side driving ring and on the end face facing away from this driving ring each interacts with the corresponding counter profile on the handle-side driving ring or in the housing.
  • the training in the case of two permissible directions of rotation is preferably made such that a separate coaxial shaft ring is provided for each direction of rotation, the saw teeth of a backdrop alternately having steeper and flatter flanks and the flatter or steeper flanks of a backdrop being inclined in opposite directions run to the flatter or steeper flanks of the other backdrop.
  • the switching process i.e. the rotation of the further drive ring that can be coupled to the switch shaft is triggered by exceeding the dead center position of the rotatable links and the force stored in the energy accumulator reaches the steeper of the two flanks of the sawtooth of the link quickly and independently of the speed of actuation of the switch handle quick effect.
  • the switching process itself therefore takes place at an essentially uncontrollable speed and the rotation of the switch handle until the switching process is triggered is used exclusively to store the force required for the switching process.
  • the switching process itself takes place in an advantageous manner in that the link is rotated by the handle-side driver ring, the design being advantageously made such that the handle-side driver ring concentric with its inclined surfaces interacting with the switch-side driver ring for each link sawtooth-like profiles for rotating the respective Backdrop (s), which act as a freewheel when using the backstop serving for the other direction of rotation of the locking mechanism.
  • the switch-side driver ring is provided with a profile in the form of knobs, ribs or recesses or the like.
  • the design is such that the knobs, radial ribs or the like.
  • switch-side driver ring is formed on the side facing away from the inclined surfaces of the handle-side driver ring, the maximum flank inclination of the knobs, radial ribs or the like. or recesses and / or radial grooves in the circumferential direction with respect to a normal plane to the raster axis is smaller than 90 °.
  • the switch-side driver ring is released from the profiles via the coupling for towed entrainment.
  • the energy accumulator is formed by at least three springs arranged on the circumference of the housing, the spring plates of which overlap the edge of the handle-side and axially displaceable driving ring on the side facing the switch handle ,
  • the arrangement of at least three springs ensures that a sufficient adjustment force for the switch is stored even if a spring breaks. To increase the symmetry of the force even when a spring breaks, more springs can of course be accommodated, which seems particularly possible due to the small compression springs in the housing.
  • the energy accumulator formed by the compression springs is charged by axial displacement of the handle-side driver ring when moving along the flatter flanks of a backdrop or along the inclined surfaces of the switch-side driver ring and the springs must therefore be arranged so that the spring plate touches the edge of the handle-side and axially overlap the displaceable driver ring on the side which is to be acted upon when the compression springs are released in order to turn the switch-side driver ring into the new detent position.
  • FIG. 1 shows a snap catch mechanism according to the invention in axial section
  • FIG. 2 shows a part of a developed view of a backdrop of the snap-action mechanism of FIG. 1 in cooperation with the handle-side driver ring and the rear housing part
  • 3 shows a part of a developed representation of the switch-side driver ring in cooperation with the handle-side driver ring in a position of the snap-action mechanism corresponding to FIG. 2
  • 4 shows the parts shown in FIG. 2 with the energy accumulator tensioned at the moment when the switch contacts are actuated
  • FIG. 5 shows the parts of the snap-action mechanism shown in FIG. 3 in a position of the snap-action mechanism corresponding to FIG. 4.
  • the switch contacts to be actuated and their actuating elements to be driven by the driver ring on the switch side are not shown in the drawing.
  • the housing of the snap mechanism is composed of a front or handle-side housing part 1 and a rear or switch-side housing part 2 by means of a latching connection 3.
  • a hollow drive shaft 4 can be rotated in any direction by a switch handle (not shown).
  • the drive shaft 4 is secured by a stop shoulder 5 of the front housing part 1 against falling out of the housing 1, 2.
  • a handle-side driver ring 6 is coupled to the drive shaft 4 in a rotationally fixed but axially displaceable manner via a toothing 7. In the left half of FIG. 1, the driver ring 6 is drawn in its rest position, in the right half of FIG. 1 it is shown in its maximum raised position during a switching operation.
  • an energy store is provided with several springs 8 arranged uniformly distributed over the circumference of the housing, this energy store during most of the way of the switch handle movement stretched from one position to the next and only released at the end of this path for the contact movement during the switching process.
  • One of the springs 8 of the energy accumulator is shown in section in the right half of FIG. 1. The upper end of the spring 8 in the drawing is supported in the front housing part 1. The lower end of the spring 8 rests on a spring plate 9 which is Z-shaped in longitudinal section.
  • the special shape of the spring plate 9 makes it possible, despite the fact that the handle-side driver ring 6 moves up and down in the front region of the housing 1, 2, almost to use the entire clear height available in the housing 1, 2 for the installation space of the springs 8. This enables the required spring force and a favorable spring characteristic to be achieved in a simple manner.
  • the projection 10 of the spring plate 9 located at a distance from the lower end of the spring 8 engages over the upper edge area of the handle-side driver ring 6 and in this way transmits the spring force to the driver ring. 2 to 5, a spring 8 is shown only schematically and not according to the actual construction.
  • the driver ring 6 on the handle side is provided with radial ribs 11, the angular division of which corresponds to the angular division of the switch positions.
  • stop rockers 12 are pivotally mounted about radial axes in the front housing part 1, the stop rockers 12 extending in the circumferential direction over a length which is greater than the distance measured on the same radius radial ribs 11 of the handle-side driver ring 6, as can be clearly seen from FIGS. 2 to 5.
  • each backdrop is provided on its end faces with saw teeth that run in the circumferential direction and are inclined in opposite directions, which alternately have steeper and flatter flanks, the flatter or steeper flanks of one backdrop being inclined in opposite directions to the flatter or steeper flanks of the other backdrop .
  • the upper saw teeth interact with corresponding saw teeth of the driver-side driving ring and the lower saw teeth with large tooth height are in operative connection with corresponding saw teeth formed in the rear housing part 2. The interaction of these saw teeth will be explained in more detail below.
  • a clearance 16 is provided between the mutually facing end faces of the drive shaft 4 and the switch-side driver ring 13.
  • a compression spring 17 is inserted between the two end faces.
  • FIG. 2 shows a development of a cylindrical surface running through the link 14
  • FIG. 3 shows a development of a cylindrical surface running through the interacting profiles of the two driving rings, each in the idle state of the snap-action mechanism.
  • the compression spring 17 presses the driver-side driving ring 13 with its end-side recesses 24 onto the knobs 25 of the rear housing part 2 and thereby snaps the switch so that it is subject to both vibration and vibration when tensioning the energy accumulator is held in position by actuating the handle-side driver ring 6.
  • the driver-side driver ring on the flank 29 is carried so far that the knobs 25 are moved out of the recesses 24 and thus the latching of the switch is canceled.
  • the flanks 22 of the driver ring 6 on the handle side move on the flanks 23 of the switch-side driver ring 13 in synchronism with the movement of the flanks 20 along the corresponding flanks 21.
  • the force of the springs 8 acts on the handle-side driver ring 6 via the inclined flanks 22 on the flanks 23 of the switch-side driver ring 13 and moves it into the next position, to the right in the drawing, until the knobs 25 come to rest in the recesses 24.
  • the ribs 11 of the handle-side driving ring 6 are released and the next switching movement can be started. If the force of the springs 8 is not sufficient to move the driver-side driver ring 13 and no more torque is exerted on the actuating element, then the handle-side driver ring 6 is moved back over the flanks 22 and 23 into the starting position and thus the actuating element shows, mostly is provided with a display device, the position corresponding to the switch-side driver ring 13.

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  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Switches With Compound Operations (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Enzymes And Modification Thereof (AREA)
  • Mechanical Control Devices (AREA)
  • Cephalosporin Compounds (AREA)
  • Clamps And Clips (AREA)
  • Finger-Pressure Massage (AREA)
  • Supports Or Holders For Household Use (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Lock And Its Accessories (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Massaging Devices (AREA)
  • Fertilizing (AREA)
  • Telephone Function (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

In a snap locking mechanism for rotary switches an operating shaft (4) operable by a switch handle can be rotated against the force of an energy-storage mechanism and each lock-in position is occupied with at least partial release of the energy-storage mechanism. The energy-storage mechanism is formed by axially acting compression springs (8) and acts on a driver ring (6) exhibiting slopes in the peripheral direction which interacts with another driver ring (13), couplable with the operating shaft, exhibiting a corresponding counterprofile with slopes. A coupling for dragged slaving (28, 29) is provided between the two driver rings (6, 13). Handle-side driver ring (6) carries stops (11) on its front facing away from these slopes, which interact with counterstops (12), integral with the housing, when they reach the snap position of the locking mechanism. Two annular links (14, 15) placed concentrically to the slopes of driver rings (6,13), each of which is operative for one direction of rotation each and which exhibit on their front sawteeth inclined in the opposite direction to one another running in the peripheral direction and which interact respectively with a corresponding counterprofile on handle-side driver ring (6) or in housing (2) (FIG. 1).

Description

Die Erfindung betrifft ein Schnapprastenwerk für Drehschalter mit mehr als zwei Raststellungen, bei welchem die Antriebswelle entgegen der Kraft eines Kraftspeichers verdrehbar ist und die Raststellung unter zumindest teilweiser Entspannung des Kraftspeichers eingenommen wird, wobei der Kraftspeicher von wenigstens einer axial wirkenden Druckfeder gebildet ist und einen in Umfangsrichtung Schrägflächen aufweisenden Mitnehmerring beaufschlagt, welcher Mitnehmerring mit einem ein entsprechendes Gegenprofil mit Schrägflächen aufweisenden, mit der Schalterwelle kuppelbaren, weiteren Mitnehmerring zusammenwirkt.The invention relates to a snap mechanism for rotary switches with more than two locking positions, in which the drive shaft can be rotated against the force of an energy accumulator and the locking position is assumed with at least partial relaxation of the energy accumulator, the energy accumulator being formed by at least one axially acting compression spring and one in In the circumferential direction, the driving ring having inclined surfaces is acted upon, which driving ring interacts with a further driving ring which has a corresponding counter profile with inclined surfaces and can be coupled to the switch shaft.

Bei handbetätigten Schaltern ergibt sich stets das Problem, daß die Geschwindigkeit, mit der die beweglichen Kontakte von den feststehenden Kontakten abgehoben werden, von der Geschwindigkeit abhängt, mit der die Antriebswelle des Schalters betätigt wird. Bei langsamer Betätigung des Schalters kann es daher auf Grund der langsamen Trennung der Kontakte zur Ausbildung eines sehr kräftigen Lichtbogens kommen, der zu einer beträchtlichen Verringerung der Lebensdauer der Kontakte und unter Umständen auch zur Zerstörung des Schalters durch Beschädigung der die Kontakte haltenden Teile aus Isoliermaterial oder Ausglühen der Kontaktfedern führt.With manually operated switches, there is always the problem that the speed at which the movable contacts are lifted from the fixed contacts depends on the speed at which the drive shaft of the switch is actuated. When the switch is operated slowly, the slow separation of the contacts can therefore lead to the formation of a very powerful arc, which leads to a considerable reduction in the service life of the contacts and possibly also to destruction of the switch due to damage to the parts made of insulating material or contacts Annealing of the contact springs leads.

Häufig wird daher die Forderung nach einem Schalter gestellt, bei dem die Geschwindigkeit der Kontaktbewegung durch die Konstruktion vorgegeben und im Betrieb praktisch nicht mehr beeinflußbar ist. Dies ist beispielsweise bei motorgetriebenen Schaltern der Fall, die jedoch teuer sind und den Nachteil aufweisen, von einer entsprechenden Energieversorgung abhängig zu sein, und deshalb für manche Anwendungsfälle nicht einsetzbar sind.Frequently, therefore, the demand is made for a switch in which the speed of the contact movement is predetermined by the construction and can practically no longer be influenced in operation. This is the case, for example, with motor-driven switches, which, however, are expensive and have the disadvantage of being dependent on a corresponding energy supply and therefore cannot be used for some applications.

Der DE-C 524 332 ist ein elektrischer Installationsschalter der eingangs genannten Art zu entnehmen, wobei darauf abgezielt wurde, stets ein sicheres Ausheben einer unter Federdruck stehenden Sperrscheibe und einen leichten und gleichmäßigen Gang des Schalters zu erreichen. Zu diesem Zweck ist bei dieser bekannten Ausbildung sowohl die Sperrscheibe als auch ein damit zusammenwirkender Sperrbügel mit zueinander komplementären Rasten ausgebildet.DE-C 524 332 shows an electrical installation switch of the type mentioned at the outset, the aim of which was always to ensure safe lifting under spring pressure standing lock washer and to achieve a smooth and smooth gear of the switch. For this purpose, in this known design, both the locking disk and a locking bracket interacting with it are designed with mutually complementary catches.

Aus der AT-PS 374 960 ist weiters ein Rastenwerk für Schalter bekannt, bei welchem zwischen einer mit einer Handhabe od.dgl. verbundenen Antriebswelle und einer die Kontaktbetätigungen steuernden Stelleinrichtung eine Kupplung vorgesehen ist. Eine mit der Antriebswelle drehfest verbundene antriebsseitige Kupplungshälfte dieser Kupplung umfaßt einen scheibenförmigen Teil mit einer in der von der Handhabe od.dgl. abgewendeten Stirnfläche ausgebildeten, z.B. nach beiden Seiten unter 45° abfallende Erhöhungen aufweisenden Steuerkurve und einen Ansatz mit kleinerem Durchmesser, der von einem hohlzylindrischen Ansatz der abtriebsseitigen Kupplungshälfte übergriffen ist. Dieser hohlzylindrische Ansatz ist von einer als Kraftspeicher dienenden Spiralfeder umgeben, die unter Vorspannung eingesetzt ist und mit ihren in radialer Richtung einwärts abgebogenen Enden in eine in beiden Ansätzen ausgebildete Ausnehmung ragt. In der Ruhestellung des Rastenwerkes fluchten die Seitenwände der Ausnehmung beider Ansätze in je einer durch die Drehachse verlaufenden Ebene. Die abtriebsseitige Kupplungshälfte hat bei dem von der Antriebswelle abgewendeten Ende eine Nabe mit Außenverzahnung, welche die drehfeste Mitnahme einer scheibenförmigen Zwischenratsche sicherstellt, die an ihren beiden Stirnflächen Ratschenzähne für entgegengesetzte Drehrichtungen aufweist. Die Zwischenratsche wirkt zur Bildung einer Hemmeinrichtung einerseits mit einer im Gehäuse des Rastenwerkes drehfest und unverschiebbar gehaltenen Ratschenscheibe und anderseits mit einer drehfest, jedoch in Nuten der hinteren Gehäuseschale des Rastenwerkes axial verschiebbar gehaltenen und federnd gegen die abtriebsseitige Kupplungshälfte gedrückten Ratschenscheibe zusammen. Zum Steuern der Hemmeinrichtung dienen in Bohrungen der abtriebsseitigen Kupplungshälfte axial verschiebbar angeordnete Stifte, die mit einem Ende an der Steuerkurve sowie mit dem anderen Ende an der unverdrehbar und axial verschiebbar gehaltenen, federbelasteten Ratschenscheibe anliegen und die außerdem mit Schultern an der Zwischenratsche zur Anlage bringbar sind.From AT-PS 374 960 a latching mechanism for switches is also known, in which or the like between one with a handle. connected drive shaft and a control device controlling the contact actuations, a clutch is provided. A drive-side coupling half of this coupling, which is connected in a rotationally fixed manner to the drive shaft, comprises a disk-shaped part with one or the like in the handle. Averted end face trained, for example, on both sides with 45 ° descending elevations and having a shoulder with a smaller diameter, which is overlapped by a hollow cylindrical approach to the output side coupling half. This hollow cylindrical approach is surrounded by a spiral spring serving as an energy store, which is inserted under pretension and protrudes with its ends bent inwards in the radial direction into a recess formed in both approaches. In the rest position of the rest mechanism, the side walls of the recess of both lugs are aligned in a plane running through the axis of rotation. At the end facing away from the drive shaft, the coupling half on the output side has a hub with external toothing, which ensures that a disc-shaped intermediate ratchet, which has ratchet teeth for opposite directions of rotation on its two end faces, is entrained in rotation. The intermediate ratchet interacts to form an inhibiting device on the one hand with a ratchet disc held in the housing of the locking mechanism in a rotationally fixed and non-displaceable manner and on the other hand with a ratchet disc which is non-rotatable but is axially displaceable in the grooves of the rear housing shell of the locking mechanism and is pressed resiliently against the clutch half on the output side. To control the inhibiting device are used axially displaceably arranged in bores of the output side coupling half Pins which rest at one end on the control cam and at the other end on the non-rotatable and axially displaceable, spring-loaded ratchet disc and which can also be brought to bear on the intermediate ratchet with shoulders.

Bei dieser Art von Schaltern bringt die Ausbildung des Kraftspeichers als Spiralfeder gewisse Nachteile mit sich, da einerseits die Federwindungen möglichst wenig oder gar nicht in Berührung mit umgebenden Wandungsteilen des Rastenwerk bzw. Schaltergehäuses kommen sollen, damit die Geschwindigkeit der Kontaktbewegung nicht in unerwünschter Weise beeinflußt wird, und anderseits die Angriffstellen der Federenden an den zugeordneten Teilen des Rastenwerkes, die aus Gewichts-, Isolations- und Korrosionsgründen praktisch immer aus Kunststoff bestehen, im Hinblick auf die Lebensdauer des Schalters kritisch sind.In this type of switch, the design of the energy accumulator as a spiral spring has certain disadvantages, since on the one hand the spring windings should come into contact with the surrounding wall parts of the catch mechanism or switch housing as little or not at all, so that the speed of the contact movement is not undesirably influenced , and on the other hand the points of attack of the spring ends on the assigned parts of the locking mechanism, which for reasons of weight, insulation and corrosion practically always consist of plastic, are critical with regard to the service life of the switch.

Ein anderer Nachteil bekannter, mit einem Rastenwerk versehener Drehschalter war, daß das Betätigungselement sehr schnell über mehrere Stellungen gedreht werden konnte, das Schalterelement aber durch die Hemmeinrichtung nur schrittweise bewegt werden sollte. Die Hemmeinrichtung mußte daher das Schwungmoment des Schalters und die überschüssige Kraft des Federspeichers in der gewünschten Raststellung stoppen. Da aber der Schalter eine eindeutige Stellung verlangt und kein Freispiel haben darf, muß die Hemmeinrichtung auf kürzestem Weg wirksam werden und große Kräfte aufnehmen können. Dadurch war die Hemmeinrichtung oft überfordert.Another disadvantage of known rotary switches provided with a detent mechanism was that the actuating element could be rotated very quickly over several positions, but the switch element should only be moved gradually by the inhibiting device. The inhibitor therefore had to stop the momentum of the switch and the excess force of the spring accumulator in the desired locking position. But since the switch requires a clear position and must not have a free spin, the inhibitor must be effective in the shortest possible way and can absorb large forces. As a result, the inhibitor was often overwhelmed.

Die Erfindung zielt darauf ab, ein Schnapprastenwerk der eingangs genannten Art zu schaffen, bei welchem die Geschwindigkeit der Kontaktbewegung bei einem Schaltvorgang von der Betätigungsgeschwindigkeit der Antriebswelle sowie von anderen Einflüssen unabhängig ist und welches eine für die Lebensdauer günstige Art der Kraftübertragung zwischen dem Kraftspeicher und den zugeordneten Teilen des Rastenwerkes aufweist und bei welchem ein unbeabsichtigtes Überdrehen von Raststellungen durch zu rasches Drehen des Schaltergriffes bzw. Ausüben eines übermäßigen Drehmomentes auf denselben verhindert ist.The invention aims to provide a snap mechanism of the type mentioned, in which the speed of the contact movement during a switching process is independent of the actuation speed of the drive shaft and other influences and which is a type of power transmission between the energy accumulator and the favorable for the service life has associated parts of the rest mechanism and at which prevents accidental overturning of locking positions by turning the switch handle too quickly or exerting excessive torque on it.

Zur Lösung dieser Aufgabe besteht das erfindungsgemäße Schnapprastenwerk im wesentlichen darin, daß zwischen den beiden Mitnehmerringen eine Kopplung für geschleppte Mitnahme vorgesehen ist, daß der griffseitige Mitnehmerring Anschläge trägt, welche mit gehäusefesten Gegenanschlägen bei Erreichen einer Schnappstellung des Rastenwerkes zusammenwirken und eine weitere Bewegung des Mitnehmerringes blockieren, daß wenigstens eine ringförmige Kulisse vorgesehen ist, welche an ihren Stirnseiten in Umfangsrichtung verlaufende, zueinander gegensinnig geneigte Sägezähne aufweist und mit entsprechenden Gegenprofilen am griffseitigen Mitnehmerring bzw. im Gehäuse zusammenwirkt, und daß der schalterseitige Mitnehmerring mit Noppen, radialen Rippen od.dgl. bzw. Ausnehmungen und/oder radialen Rillen ausgebildet ist, die mit komplementär dazu ausgebildeten Profilierungen des Gehäuses zusammenwirken.To solve this problem, the snap-action mechanism according to the invention essentially consists in that a coupling for dragging is provided between the two driver rings, that the driver-side driver ring carries stops which cooperate with counter-stops fixed to the housing when a snap position of the catch mechanism is reached and block a further movement of the driver ring that at least one ring-shaped link is provided, which has saw teeth on its end faces in the circumferential direction, mutually oppositely inclined and cooperates with corresponding counter profiles on the handle-side driver ring or in the housing, and that the switch-side driver ring with knobs, radial ribs or the like. or recesses and / or radial grooves is formed, which cooperate with complementary profiles of the housing.

Da der Kraftspeicher von wenigstens einer axial wirkenden Druckfeder gebildet ist, kann mit kleinbauenden Federn eine hohe Kraft gespeichert werden und es wird insbesondere eine Ausbildung möglich, bei welcher selbst bei Bruch einer Feder die Funktion des Rastenwerkes nicht wesentlich beeinträchtigt ist. Die Kraftspeicherung durch Kompression einer derartigen Druckfeder erlaubt darüberhinaus Konstruktionen, bei welchen die gespeicherte Kraft auf wesentlich größerem Radius und über den Umfang des beaufschlagten Mitnehmerringes verteilt zur Wirkung gebracht wird, wobei diese Art der Kraftaufnahme wesentlich günstiger ist als die im Falle einer ebenen Spiralfeder aufnehmbare Kraft, welche zumindest an einem Ende der ebenen Spiralfeder immer in Achsnähe und damit über einen ungünstigen Hebelarm zur Wirkung gebracht wird. Auf Grund der axial verschiebbaren Anordnung des mit der Antriebswelle drehfest gekuppelten griffseitigen Mitnehmerringes kann dieser von den Kraftspeicher bildenden Druckfedern, beispielsweise an mehreren Stellen des Umfanges dieses Mitnehmerringes, beaufschlagt werden, wodurch sich eine besonders günstige Kraftaufnahme bei kleinbauenden Federn ergibt. Insbesondere ermöglicht eine derartige Ausbildung eine geschützte Anordnung der Federn in der Wandung des Gehäuses des Schnapprastenwerkes.Since the energy accumulator is formed by at least one axially acting compression spring, a high force can be stored with small-sized springs, and in particular an embodiment is possible in which even if a spring breaks, the function of the locking mechanism is not significantly impaired. The energy storage by compression of such a compression spring also allows constructions in which the stored force is brought to effect over a much larger radius and distributed over the circumference of the driven driving ring, this type of force absorption being considerably cheaper than the force which can be absorbed in the case of a flat spiral spring , which is always brought into effect at least at one end of the flat spiral spring near the axis and thus via an unfavorable lever arm. On account of the axially displaceable arrangement of the driver-side driver ring which is coupled in a rotationally fixed manner to the drive shaft, it can act, for example, on compression springs forming the force accumulator several places on the circumference of this driver ring, are applied, which results in a particularly favorable force absorption with small-sized springs. In particular, such a design enables a protected arrangement of the springs in the wall of the housing of the snap-action mechanism.

Die erfindungsgemäß vorgeschlagene Kopplung für geschleppte Mitnahme zwischen den beiden Mitnehmerringen sorgt dann, wenn der Schaltergriff über den größeren Teil des Weges von einer Raststellung zur nächsten verdreht und der Kraftspeicher entsprechend gespannt ist, für das Einleiten der Betätigung der Schalterelemente. Durch das Zusammenwirken der Anschläge des griffseitigen Mitnehmerringes mit den gehäusefesten Gegenanschlägen wird beim Erreichen der Schnappstellung des Rastenwerkes das Weiterverdrehen des Schaltergriffes momentan blockiert und damit ein Überdrehen des Schaltergriffes zur nächstfolgenden Raststellung weitestgehend verhindert, da auch die den Schalter betätigende Person an dem momentanen Widerstand spürt, daß sie den Schaltergriff für den beabsichtigten Schaltvorgang ausreichend weit verdreht hat. Eine Entlastung der Schrägflächen der Mitnehmerringe bei exakter Blockierung des Weges derselben bei Erreichen der Schaltstellung wird erfindungsgemäß dadurch erzielt, daß wenigstens eine ringförmige Kulisse vorgesehen ist, welche an ihren Stirnseiten in Umfangsrichtung verlaufende, zueinander gegensinnig geneigte Sägezähne aufweist und mit entsprechenden Gegenprofilen am griffseitigen Mitnehmerring bzw. im Gehäuse zusammenwirkt. Für die Einhaltung der Ruhelage der Schalterwelle bis zur tatsächlichen Auslösung des Schaltvorganges ist weiters erfindungsgemäß vorgesehen, daß der schalterseitige Mitnehmerring mit Noppen, radialen Rippen od.dgl. bzw. Ausnehmungen und/oder radialen Rillen ausgebildet ist, die mit komplementär dazu ausgebildeten Profilierungen des Gehäuses zusammenwirken.The coupling proposed according to the invention for entrained entrainment between the two driver rings ensures that the switch elements are initiated when the switch handle rotates from one latching position to the next over the greater part of the path and the energy accumulator is tensioned accordingly. Due to the interaction of the stops of the handle-side driver ring with the counter-stops fixed to the housing, the turning of the switch handle is momentarily blocked when the catch mechanism is in the snap position, and overturning of the switch handle to the next following stop position is largely prevented, since the person operating the switch also feels the instantaneous resistance. that it has twisted the switch handle sufficiently for the intended switching operation. A relief of the inclined surfaces of the driver rings upon exact blocking of the path of the driver rings upon reaching the switching position is achieved according to the invention in that at least one annular link is provided which has saw teeth on its end faces which extend in the circumferential direction and are oppositely inclined to one another and with corresponding counter profiles on the driver side driver ring or interacts in the housing. In order to maintain the rest position of the switch shaft until the switching operation is actually triggered, it is further provided according to the invention that the driver-side driver ring with knobs, radial ribs or the like. or recesses and / or radial grooves is formed, which cooperate with complementary profiles of the housing.

Vorzugsweise sind die gehäusefesten Anschläge schwenkbar gelagert. Die Bauweise kann hiebei einer am Außenumfang des griffseitigen Mitnehmerringes angreifenden Sperrklinke entsprechen. Bei einem in beiden Drehrichtungen wirksamen Schnapprastenwerk ist dann für jede Drehrichtung mindestens eine derartige Sperrklinke vorzusehen.The stops fixed to the housing are preferably pivotally mounted. The design can hiebei one on the outer circumference of the corresponding pawl on the handle-side driving ring. With a snap mechanism that is effective in both directions of rotation, at least one such pawl must then be provided for each direction of rotation.

Eine günstige Ausführungsform eines in beiden Drehrichtungen wirksamen Schnapprastenwerkes besteht darin, daß die Anschläge des griffseitigen Mitnehmerringes von radialen Rippen gebildet sind, welche mit im Gehäuse gelagerten schwenkbaren Anschlagwippen zusammenwirken. Die Anschlagwippen sind um zu Drehachse des Rastenwerkes radiale Achsen schwenkbar und werden durch die radialen Rippen des griffseitigen Mitnehmerringes bei dessen Verdrehung in Abhängigkeit von der Drehrichtung in die jeweils für die Erzielung eines sicheren Anschlages erforderliche Stellung verschwenkt. Beim Verdrehen des griffseitigen Mitnehmerringes laufen dessen radiale Rippen gegen die Stirnseiten der Anschlagwippen, wodurch der griffseitige Mitnehmerring und der Schaltergriff angehalten werden, bis das Schalterelement handunabhängig dieser Stellung gefolgt ist; dann geraten die radialen Rippen des griffseitigen Mitnehmerringes aus dem Eingriffbereich der Anschlagwippen und dieser Mitnehmerring sowie der Schaltergriff sind für einen nächsten Schritt freigegeben. Die Anschlagwippen lassen sich ohne wesentlichen Bedarf an Volumen an der inneren Stirnfläche des Gehäuses unterbringen.A favorable embodiment of a snap-action mechanism that is effective in both directions of rotation consists in that the stops on the handle-side driver ring are formed by radial ribs, which interact with pivotable stop rockers mounted in the housing. The stop rockers are pivotable about radial axes to the axis of rotation of the locking mechanism and are pivoted by the radial ribs of the handle-side driving ring when it rotates depending on the direction of rotation in the position required for achieving a secure stop. When the handle-side driver ring is turned, its radial ribs run against the end faces of the stop rockers, as a result of which the handle-side driver ring and the switch handle are stopped until the switch element has independently followed this position; the radial ribs of the driver ring on the handle side then come out of the engagement area of the stop rockers and this driver ring and the switch handle are released for a next step. The stop rockers can be accommodated on the inner end face of the housing without any significant volume requirement.

Zweckmäßig erstrecken sich die Anschlagwippen in Umfangsrichtung über eine Länge, welche größer ist als der auf gleichem Radius gemessene Abstand der radialen Rippen des griffseitigen Mitnehmerringes. Dadurch werden die Anschlagwippen von den radialen Rippen bei deren Bewegung entgegen der Kraft des Kraftspeichers in eine Schwenklage gebracht, welche einen sicheren Anschlag für die in Drehrichtung nachfolgende radiale Rippe gewährleistet.The stop rockers expediently extend in the circumferential direction over a length which is greater than the distance, measured at the same radius, of the radial ribs of the driver ring on the handle side. As a result, the stop rockers are brought into a pivoting position by the radial ribs when they move against the force of the energy accumulator, which ensures a secure stop for the radial rib which follows in the direction of rotation.

Vorzugsweise ist zur Erzielung der Kopplung für geschleppte Mitnahme zwischen den beiden gleichachsig angeordneten Mitnehmerringen an dem einen Mitnehmerring eine Außenverzahnung mit in Umfangsrichtung schmalen Zähnen vorgesehen, welche Zähne in in Umfangsrichtung breite Zahnlücken einer an dem anderen Mitnehmerring vorgesehenen Innenverzahnung eingreifen. Auf diese Weise wird mit einfachen Mitteln eine robuste Totgang-Verbindung erzielt, ohne daß hiefür eine Vergrößerung der axialen Baulänge des Rastenwerkes erforderlich ist.Preferably, to achieve the coupling for entrained entrainment between the two coaxial carrier rings on the one driving ring there is an external toothing with narrow teeth in the circumferential direction, which teeth engage in tooth gaps that are wide in the circumferential direction of an internal toothing provided on the other driving ring. In this way, a robust lost motion connection is achieved with simple means, without this requiring an increase in the axial length of the locking mechanism.

Gemäß einer bevorzugten Weiterbildung des erfindungsgemäßen Schnapprastenwerkes sind die Schrägflächen des griffseitigen Mitnehmerringes sowie die mit diesen Schrägflächen zusammenwirkenden Schrägflächen des schalterseitigen Mitnehmerringes jeweils untereinander entgegengesetzt gleich geneigt. Bei einer derartigen Ausbildung sind die griffseitig aufzuwendenden verdrehkräfte zum Zwecke der Speicherung von Kraft in entgegengesetzte Drehrichtungen gleich. Die Schrägflächen der miteinander zusammenwirkenden Mitnehmerringe werden nicht über den jeweils höchsten Punkt der Schrägflächen hinaus bewegt und somit gelangen stets die selben Flächenpaare der beiden Mitnehmerringe in Anlage aneinander.According to a preferred development of the snap-action mechanism according to the invention, the inclined surfaces of the driver-side driver ring and the inclined surfaces of the switch-side driver ring which interact with these inclined surfaces are each inclined in opposite directions to one another in the same way. With such a design, the twisting forces to be applied on the handle side are the same for the purpose of storing force in opposite directions of rotation. The inclined surfaces of the interacting driver rings are not moved beyond the highest point of the inclined surfaces and thus the same surface pairs of the two driver rings always come into contact with one another.

Bei der Bestückung eines Schalters mit verschiedenartigen Schalterelementen, wie Öffnern, Schließern oder Wechslern, ergeben sich unterschiedliche Drehmomentbelastungen des Schalterantriebes. Durch eine Weiterbildung des erfindungsgemäßen Schnapprastenwerkes läßt sich zumindest für das Spannen des Kraftspeichers eine Entlastung der Schrägflächen der Mitnehmerringe weiter dadurch verbessern, daß die ringförmige Kulisse konzentrisch zu den Schrägflächen der Mitnehmerringe angeordnet ist und daß die Kulisse an der dem griffseitigen Mitnehmerring zugewandten Seite und an der diesem Mitnehmerring abgewandten Stirnseite je mit dem entsprechenden Gegenprofil am griffseitigen Mitnehmerring bzw. im Gehäuse zusammenwirkt. Durch die konzentrische Anordnung derartiger ringförmiger Kulissen wird wiederum eine kompakte Bauweise erreicht, wobei im Falle von Sägezähnen mit abwechselnd steileren und flacheren Flanken im Falle von zwei zulässigen Drehrichtungen entsprechend gegensinnig orientierte Kulissen angeordnet werden können, welche wiederum platzsparend konzentrisch zueinander angeordnet werden können.When equipping a switch with various types of switch elements, such as break contacts, make contacts or change-over contacts, the switch drive has different torque loads. By developing the snap mechanism according to the invention, at least for the tensioning of the energy accumulator, a relief of the inclined surfaces of the driving rings can be further improved in that the annular link is arranged concentrically to the inclined surfaces of the driving rings and that the link on the side facing the handle-side driving ring and on the end face facing away from this driving ring each interacts with the corresponding counter profile on the handle-side driving ring or in the housing. The concentric arrangement of such annular backdrops in turn achieves a compact design, with in the case of saw teeth with alternately steeper and flatter flanks in the case of two permissible ones Rotation directions can be arranged according to oppositely oriented backdrops, which in turn can be arranged concentrically to each other to save space.

Die Ausbildung ist im Falle von zwei zulässigen Drehrichtungen hiebei mit Vorzug so getroffen, daß für jede Drehrichtung eine gesonderte gleichachsig angeordnete ringförmige Kulisse vorgesehen ist, wobei die Sägezähne einer Kulisse abwechselnd steilere und flachere Flanken aufweisen und die flacheren bzw. steileren Flanken einer Kulisse entgegengesetzt geneigt zu den flacheren bzw. steileren Flanken der anderen Kulisse verlaufen. Der Schaltvorgang, d.h. die Verdrehung des mit der Schalterwelle kuppelbaren weiteren Mitnehmerringes, wird hiebei durch Überschreiten der Totpunktlage der relativ zueinander verdrehbaren Kulissen ausgelöst und die im Kraftspeicher gespeicherte Kraft gelangt über die jeweils steilere der beiden Flanken des Sägezahnes der Kulisse rasch und von der Geschwindigkeit der Betätigung des Schaltergriffes unabhängig rasch zur Wirkung. Der Schaltvorgang selbst erfolgt daher mit im wesentlichen unbeeinflußbarer Geschwindigkeit und die Verdrehung des Schaltergriffes bis zum Auslösen des Schaltvorganges dient ausschließlich der Speicherung der erforderlichen Kraft für den Schaltvorgang. Der Schaltvorgang selbst erfolgt hiebei in vorteilhafter Weise dadurch, daß die Kulisse vom griffseitigen Mitnehmerring verdreht wird, wobei die Ausbildung mit Vorteil so getroffen ist, daß der griffseitige Mitnehmerring konzentrisch zu seinen mit dem schalterseitigen Mitnehmerring zusammenwirkenden Schrägflächen für jede Kulisse sägezahnartige Profile zum Verdrehen der jeweiligen Kulisse(n) aufweist, die beim Einsatz der jeweils für die andere Drehrichtung des Rastenwerkes dienenden Kulisse als Freilauf wirken.The training in the case of two permissible directions of rotation is preferably made such that a separate coaxial shaft ring is provided for each direction of rotation, the saw teeth of a backdrop alternately having steeper and flatter flanks and the flatter or steeper flanks of a backdrop being inclined in opposite directions run to the flatter or steeper flanks of the other backdrop. The switching process, i.e. the rotation of the further drive ring that can be coupled to the switch shaft is triggered by exceeding the dead center position of the rotatable links and the force stored in the energy accumulator reaches the steeper of the two flanks of the sawtooth of the link quickly and independently of the speed of actuation of the switch handle quick effect. The switching process itself therefore takes place at an essentially uncontrollable speed and the rotation of the switch handle until the switching process is triggered is used exclusively to store the force required for the switching process. The switching process itself takes place in an advantageous manner in that the link is rotated by the handle-side driver ring, the design being advantageously made such that the handle-side driver ring concentric with its inclined surfaces interacting with the switch-side driver ring for each link sawtooth-like profiles for rotating the respective Backdrop (s), which act as a freewheel when using the backstop serving for the other direction of rotation of the locking mechanism.

Wie oben bereits ausgeführt, ist der schalterseitige Mitnehmerring mit einer Profilierung in Form von Noppen, Rippen oder Ausnehmungen oder dgl. versehen, um sicherzustellen, daß bei dem erfindungsgemäßen Schnapprastenwerk die mit dem Schalterelement kuppelbare Schalterwelle während des Spannens des Kraftspeichers in Ruhe verbleibt und die Verdrehung der Schalterwelle, welche ausschließlich mit der im Kraftspeicher gespeicherten Kraft erfolgt, tatsächlich erst dann einsetzt, wenn der Kraftspeicher zumindest weitgehend Kraft gespeichert hat. Gemäß einer bevorzugten Weiterbildung ist die Ausführung hiebei so getroffen, daß die Noppen, radialen Rippen od.dgl. bzw. Ausnehmungen und/oder radialen Rillen des schalterseitigen Mitnehmerringes an der den Schrägflächen des griffseitigen Mitnehmerringes abgewandten Seite ausgebildet sind, wobei die maximale Flankenneigung der Noppen, radialen Rippen od.dgl. bzw. Ausnehmungen und/oder radialen Rillen in Umfangsrichtung bezüglich einer Normalebene zur Rastenwerkachse kleiner ist als 90°. Das Lösen des schalterseitigen Mitnehmerringes von den Profilierungen erfolgt über die Kopplung für geschleppte Mitnahme.As already stated above, the switch-side driver ring is provided with a profile in the form of knobs, ribs or recesses or the like. In order to ensure that the snap-action mechanism according to the invention is connected to the Switch element couplable switch shaft remains at rest during tensioning of the energy accumulator and the rotation of the switch shaft, which occurs exclusively with the force stored in the energy accumulator, actually only begins when the energy accumulator has at least largely stored force. According to a preferred further development, the design is such that the knobs, radial ribs or the like. or recesses and / or radial grooves of the switch-side driver ring are formed on the side facing away from the inclined surfaces of the handle-side driver ring, the maximum flank inclination of the knobs, radial ribs or the like. or recesses and / or radial grooves in the circumferential direction with respect to a normal plane to the raster axis is smaller than 90 °. The switch-side driver ring is released from the profiles via the coupling for towed entrainment.

Die bereits eingangs erwähnten Vorteile der Anordnung von axial wirkenden Druckfedern können dadurch besonders gut genützt werden, daß der Kraftspeicher von wenigstens drei am Umfang des Gehäuses angeordneten Federn gebildet ist, deren Federteller den Rand des griffseitigen und axial verschieblichen Mitnehmerringes an der dem Schaltergriff zugewandten Seite übergreifen, wobei die Anordnung von wenigstens drei Federn hiebei sicherstellt, daß auch bei Bruch einer Feder noch eine hinreichende Verstellkraft für den Schalter gespeichert wird. Zur Erhöhung der Symmetrie der Krafteinwirkung auch bei Bruch einer Feder können naturgemäß entsprechend mehr Federn untergebracht werden, was insbesondere auf Grund der kleinbauenden Druckfedern im Gehäuse ohne weiteres möglich erscheint.The advantages of the arrangement of axially acting compression springs mentioned at the beginning can be used particularly well in that the energy accumulator is formed by at least three springs arranged on the circumference of the housing, the spring plates of which overlap the edge of the handle-side and axially displaceable driving ring on the side facing the switch handle , The arrangement of at least three springs ensures that a sufficient adjustment force for the switch is stored even if a spring breaks. To increase the symmetry of the force even when a spring breaks, more springs can of course be accommodated, which seems particularly possible due to the small compression springs in the housing.

Der von den Druckfedern gebildete Kraftspeicher wird durch axiale Verschiebung des griffseitigen Mitnehmerringes bei der Bewegung längs der flacheren Flanken einer Kulisse bzw. längs der Schrägflächen des schalterseitigen Mitnehmerringes aufgeladen und es müssen daher die Federn so angeordnet werden, daß die Federteller den Rand des griffseitigen und axial verschieblichen Mitnehmerringes an derjenigen Seite übergreifen, welche beim Entspannen der Druckfedern beaufschlagt werden soll, um den schalterseitigen Mitnehmerring in die neue Raststellung zu verdrehen. Um hiebei Federn mit kleinem Durchmesser einsetzen zu können, ist es wünschenswert, Federn größerer Länge einzubauen, und die erfindungsgemäße Ausbildung mit lediglich axial wirkenden Druckfedern erlaubt daher in besonders vorteilhafter Weise eine Ausgestaltung, bei welcher die Federteller als in Nuten oder Bohrungen des Gehäuses axial verschiebbare Hülsen bzw. Buchsen ausgebildet sind. Auf diese Weise können die Federn sich nahezu über die gesamte axiale Länge des Gehäuses erstrecken und es wird gleichzeitig mittels der verschiebbaren Hülsen oder Buchsen eine axiale Führung der Druckfedern sichergestellt, wodurch die Krafteinwirkung beim Entspannen der Federn weitgehend frei von Reibungsverlusten gehalten werden kann.The energy accumulator formed by the compression springs is charged by axial displacement of the handle-side driver ring when moving along the flatter flanks of a backdrop or along the inclined surfaces of the switch-side driver ring and the springs must therefore be arranged so that the spring plate touches the edge of the handle-side and axially overlap the displaceable driver ring on the side which is to be acted upon when the compression springs are released in order to turn the switch-side driver ring into the new detent position. In order to be able to use springs with a small diameter, it is desirable to install springs of greater length, and the design according to the invention with only axially acting compression springs therefore allows, in a particularly advantageous manner, a configuration in which the spring plates are axially displaceable as in grooves or bores in the housing Sleeves or bushings are formed. In this way, the springs can extend almost over the entire axial length of the housing and at the same time an axial guidance of the compression springs is ensured by means of the displaceable sleeves or bushings, whereby the action of force when relaxing the springs can be kept largely free of friction losses.

Die Erfindung wird nachfolgend an Hand eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles näher erläutert. In dieser zeigt: Fig. 1 ein erfindungsgemäßes Schnapprastenwerk im Axialschnitt; Fig. 2 einen Teil einer abgewickelten Darstellung einer Kulisse des Schnapprastenwerkes von Fig. 1 im Zusammenwirken mit dem griffseitigen Mitnehmerring und dem hinteren Gehäuseteil; Fig. 3 einen Teil einer abgewickelten Darstellung des schalterseitigen Mitnehmerringes im Zusammenwirken mit dem griffseitigen Mitnehmerring in einer der Fig. 2 entsprechenden Stellung des Schnapprastenwerkes; Fig. 4 die in Fig. 2 dargestellten Teile bei gespanntem Kraftspeicher in dem Moment, in welchem die Betätigung der Schalterkontakte beginnt, und Fig. 5 die in Fig. 3 dargestellten Teile des Schnapprastenwerkes in einer der Fig. 4 entsprechenden Stellung des Schnapprastenwerkes. Die zu betätigenden Schalterkontakte und ihre vom schalterseitigen Mitnehmerring anzutreibenden Betätigungselemente sind in der Zeichnung nicht dargestellt.The invention is explained in more detail below on the basis of an exemplary embodiment schematically illustrated in the drawing. 1 shows a snap catch mechanism according to the invention in axial section; FIG. 2 shows a part of a developed view of a backdrop of the snap-action mechanism of FIG. 1 in cooperation with the handle-side driver ring and the rear housing part; 3 shows a part of a developed representation of the switch-side driver ring in cooperation with the handle-side driver ring in a position of the snap-action mechanism corresponding to FIG. 2; 4 shows the parts shown in FIG. 2 with the energy accumulator tensioned at the moment when the switch contacts are actuated, and FIG. 5 shows the parts of the snap-action mechanism shown in FIG. 3 in a position of the snap-action mechanism corresponding to FIG. 4. The switch contacts to be actuated and their actuating elements to be driven by the driver ring on the switch side are not shown in the drawing.

Aus Fig. 1 ist ersichtlich, daß das Gehäuse des Schnapprastenwerkes aus einem vorderen oder griffseitigen Gehäuseteil 1 und einem hinteren oder schalterseitigen Gehäuseteil 2 mittels einer Rastverbindung 3 zusammengesetzt ist. Durch einen nicht dargestellten Schaltergriff ist eine hohle Antriebswelle 4 in beliebiger Richtung verdrehbar. Die Antriebswelle 4 ist durch eine Anschlagschulter 5 des vorderen Gehäuseteiles 1 gegen Herausfallen aus dem Gehäuse 1, 2 gesichert. Ein griffseitiger Mitnehmerring 6 ist über eine Verzahnung 7 mit der Antriebswelle 4 drehfest, aber axial verschiebbar gekuppelt. In der linken Hälfte der Fig. 1 ist der Mitnehmerring 6 in seiner Ruhelage gezeichnet, in der rechten Hälfte der Fig. 1 ist er in seiner maximal angehobenen Lage während eines Schaltvorganges dargestellt.From Fig. 1 it can be seen that the housing of the snap mechanism is composed of a front or handle-side housing part 1 and a rear or switch-side housing part 2 by means of a latching connection 3. A hollow drive shaft 4 can be rotated in any direction by a switch handle (not shown). The drive shaft 4 is secured by a stop shoulder 5 of the front housing part 1 against falling out of the housing 1, 2. A handle-side driver ring 6 is coupled to the drive shaft 4 in a rotationally fixed but axially displaceable manner via a toothing 7. In the left half of FIG. 1, the driver ring 6 is drawn in its rest position, in the right half of FIG. 1 it is shown in its maximum raised position during a switching operation.

Damit das Rastenwerk als Schnapprastenwerk mit von der Betätigungsgeschwindigkeit des Schaltergriffes unabhängiger, hoher Geschwindigkeit die Kontaktbewegung bei einem Schaltvorgang bewirkt, ist ein Kraftspeicher mit mehreren gleichförmig über den Umfang des Gehäuses verteilt angeordneten Federn 8 vorgesehen, wobei dieser Kraftspeicher während des größten Teiles des Weges der Schaltergriffbewegung von einer Stellung zur nächsten gespannt und erst am Ende dieses Weges für die Kontaktbewegung beim Schaltvorgang freigegeben wird. Eine der Federn 8 des Kraftspeichers ist in der rechten Hälfte der Fig. 1 im Schnitt dargestellt. Das in der Zeichnung obere Ende der Feder 8 ist im vorderen Gehäuseteil 1 abgestützt. Das untere Ende der Feder 8 ruht auf einem im Längsschnitt Z-förmigen Federteller 9. Durch die besondere Formgebung des Federtellers 9 gelingt es trotz des Umstandes, daß sich der griffseitige Mitnehmerring 6 im vorderen Bereich des Gehäuses 1, 2 auf und ab bewegt, nahezu die gesamte im Gehäuse 1, 2 zur Verfügung stehende lichte Höhe für den Einbauraum der Federn 8 auszunützen. Dies ermöglicht in einfacher Weise die Erzielung der erforderlichen Federkraft sowie einer günstigen Federcharakteristik. Der vom unteren Ende der Feder 8 entfernt liegende Vorsprung 10 des Federtellers 9 übergreift den oberen Randbereich des griffseitigen Mitnehmerringes 6 und überträgt auf diese Weise die Federkraft auf den Mitnehmerring. In den Fig. 2 bis 5 ist jeweils eine Feder 8 nur schematisch und nicht der tatsächlichen Konstruktion entsprechend dargestellt.So that the latch mechanism as a snap mechanism with high speed independent of the actuation speed of the switch handle causes the contact movement during a switching operation, an energy store is provided with several springs 8 arranged uniformly distributed over the circumference of the housing, this energy store during most of the way of the switch handle movement stretched from one position to the next and only released at the end of this path for the contact movement during the switching process. One of the springs 8 of the energy accumulator is shown in section in the right half of FIG. 1. The upper end of the spring 8 in the drawing is supported in the front housing part 1. The lower end of the spring 8 rests on a spring plate 9 which is Z-shaped in longitudinal section. The special shape of the spring plate 9 makes it possible, despite the fact that the handle-side driver ring 6 moves up and down in the front region of the housing 1, 2, almost to use the entire clear height available in the housing 1, 2 for the installation space of the springs 8. This enables the required spring force and a favorable spring characteristic to be achieved in a simple manner. The projection 10 of the spring plate 9 located at a distance from the lower end of the spring 8 engages over the upper edge area of the handle-side driver ring 6 and in this way transmits the spring force to the driver ring. 2 to 5, a spring 8 is shown only schematically and not according to the actual construction.

An seiner Oberseite ist der griffseitige Mitnehmerring 6 mit radialen Rippen 11 versehen, deren Winkelteilung der Winkelteilung der Schalterstellungen entspricht. Zum Zusammenwirken mit den radialen Rippen 11 des griffseitigen Mitnehmerringes 6 sind im vorderen Gehäuseteil 1 Anschlagwippen 12 um radiale Achsen schwenkbar gelagert, wobei sich die Anschlagwippen 12 in Umfangsrichtung über eine Länge erstrecken, welche größer ist als der auf gleichem Radius gemessene Abstand der radialen Rippen 11 des griffseitigen Mitnehmerringes 6, wie dies aus den Fig. 2 bis 5 deutlich ersichtlich ist.On its upper side, the driver ring 6 on the handle side is provided with radial ribs 11, the angular division of which corresponds to the angular division of the switch positions. To interact with the radial ribs 11 of the handle-side driving ring 6, stop rockers 12 are pivotally mounted about radial axes in the front housing part 1, the stop rockers 12 extending in the circumferential direction over a length which is greater than the distance measured on the same radius radial ribs 11 of the handle-side driver ring 6, as can be clearly seen from FIGS. 2 to 5.

Innerhalb des hinteren Gehäuseteiles 2 sind die Antriebswelle 4 und ein mit dem griffseitigen Mitnehmerring 6 zusammenwirkender schalterseitiger Mitnehmerring 13 von zwei mit den Mitnehmerringen gleichachsig angeordneten Kulissen 14 und 15 umgeben, von welchen jede jeweils für eine Drehrichtung wirksam ist. Zu diesem Zweck ist jede Kulisse an ihren Stirnseiten mit in Umfangsrichtung verlaufenden, zueinander gegensinnig geneigten Sägezähnen versehen, die abwechselnd steilere und flachere Flanken aufweisen, wobei die flacheren bzw. steileren Flanken einer Kulisse entgegengesetzt geneigt zu den flacheren bzw. steileren Flanken der anderen Kulisse verlaufen. Dabei wirken die oberen Sägezähne mit entsprechenden Sägezähnen des griffseitigen Mitnehmerringes zusammen und die unteren Sägezähne mit großer Zahnhöhe stehen mit entsprechenden, im hinteren Gehäuseteil 2 ausgebildeten Sägezähnen in Wirkverbindung. Das Zusammenwirken dieser Sägezähne wird nachfolgend näher erläutert werden. Da der schalterseitige Mitnehmerring 13 bei der Betätigung des Rastenwerkes bzw. des Schalters kleine axiale Bewegungen ausführen können muß, ist zwischen den einander zugewendeten Stirnflächen der Antriebswelle 4 und des schalterseitigen Mitnehmerringes 13 ein Spielraum 16 vorgesehen. Außerdem ist zwischen den beiden Stirnflächen eine Druckfeder 17 eingesetzt.Within the rear housing part 2, the drive shaft 4 and a switch-side driver ring 13 which interacts with the handle-side driver ring 6 are surrounded by two baffles 14 and 15 arranged coaxially with the driver rings, each of which is effective for one direction of rotation. For this purpose, each backdrop is provided on its end faces with saw teeth that run in the circumferential direction and are inclined in opposite directions, which alternately have steeper and flatter flanks, the flatter or steeper flanks of one backdrop being inclined in opposite directions to the flatter or steeper flanks of the other backdrop . The upper saw teeth interact with corresponding saw teeth of the driver-side driving ring and the lower saw teeth with large tooth height are in operative connection with corresponding saw teeth formed in the rear housing part 2. The interaction of these saw teeth will be explained in more detail below. Since the switch-side driver ring 13 must be able to perform small axial movements when the catch mechanism or the switch is actuated, a clearance 16 is provided between the mutually facing end faces of the drive shaft 4 and the switch-side driver ring 13. In addition, a compression spring 17 is inserted between the two end faces.

Fig. 2 zeigt eine Abwicklung einer durch die Kulisse 14 verlaufenden Zylinderfläche und Fig. 3 zeigt eine Abwicklung einer durch die zusammenwirkenden Profile der beiden Mitnehmerringe verlaufenden Zylinderfläche jeweils im Ruhezustand des Schnapprastenwerkes. Im Ruhezustand drückt die Druckfeder 17 den schalterseitigen Mitnehmerring 13 mit seinen stirnseitigen Ausnehmungen 24 auf die Noppen 25 des hinteren Gehäuseteiles 2 und rastet dadurch den Schalter, damit dieser sowohl bei Vibration oder Erschütterung als auch beim Spannen des Kraftspeichers durch Betätigen des griffseitigen Mitnehmerringes 6 in seiner Position gehalten wird. Im Falle einer auf den griffseitigen Mitnehmerring 6 ausgeübten, in der Zeichnung nach rechts gerichteten Schaltbewegung wird über die Flanken 18 auf die entsprechenden Flanken 19 der Kulisse 14 ein Drehmoment übertragen und die Kulisse 14 gleitet mit ihren flachen Flanken 20 entlang den entsprechenden Flanken 21 des hinteren Gehäuseteiles 2 schräg aufwärts und spannt die den Kraftspeicher bildenden Federn 8. Kurz vor Ende der Schaltbewegung - bevor die Rippe 11 des Mitnehmerringes 6 gegen die Anschlagwippe 12 stößt - kommt ein schmaler Zahn oder eine Rippe 28 des Mitnehmerringes 6 auf eine Flanke 29 des schalterseitigen Mitnehmerringes 13 zu liegen und bei der weiteren Schaltbewegung wird der schalterseitige Mitnehmerring über die Flanke 29 so weit mitgenommen, daß die Noppen 25 aus den Ausnehmungen 24 bewegt werden und damit die Rastung des Schalters aufgehoben ist. Gleichlaufend mit der Bewegung der Flanken 20 entlang den entsprechenden Flanken 21 bewegen sich, wie Fig. 3 zeigt, die Flanken 22 des griffseitigen Mitnehmerringes 6 auf den Flanken 23 des schalterseitigen Mitnehmerringes 13.FIG. 2 shows a development of a cylindrical surface running through the link 14 and FIG. 3 shows a development of a cylindrical surface running through the interacting profiles of the two driving rings, each in the idle state of the snap-action mechanism. In the idle state, the compression spring 17 presses the driver-side driving ring 13 with its end-side recesses 24 onto the knobs 25 of the rear housing part 2 and thereby snaps the switch so that it is subject to both vibration and vibration when tensioning the energy accumulator is held in position by actuating the handle-side driver ring 6. In the case of a switching movement exerted on the handle-side driving ring 6, which is directed to the right in the drawing, a torque is transmitted via the flanks 18 to the corresponding flanks 19 of the link 14 and the link 14 slides with its flat flanks 20 along the corresponding flanks 21 of the rear Housing part 2 obliquely upwards and tensions the springs forming the energy store 8. Shortly before the end of the switching movement - before the rib 11 of the driving ring 6 hits the stop rocker 12 - a narrow tooth or a rib 28 of the driving ring 6 comes onto a flank 29 of the switch-side driving ring 13 to lie and in the further switching movement, the driver-side driver ring on the flank 29 is carried so far that the knobs 25 are moved out of the recesses 24 and thus the latching of the switch is canceled. 3, the flanks 22 of the driver ring 6 on the handle side move on the flanks 23 of the switch-side driver ring 13 in synchronism with the movement of the flanks 20 along the corresponding flanks 21.

In den Fig. 4 und 5 ist die gegenseitige Lage der einzelnen Bauteile des Rastenwerkes für jenen Moment dargestellt, in dem der Federspeicher gespannt ist und der schalterseitige Mitnehmerring seine handunabhängige Bewegung beginnt. In dieser Lage stößt die Rippe 11 des griffseitigen Mitnehmerringes 6 gegen die Anschlagwippe 12 und die Spitzen 26 der Sägezähne der Kulisse 14 kommen gerade über die Spitzen 27 der ortsfesten Sägezähne am Boden des hinteren Gehäuseteiles 2 hinweg, so daß die Kulisse 14 mit ihren Sägezähnen in die Zahnlücken der ortsfesten Verzahnung einfallen kann. Dadurch wirkt die Kraft der Federn 8 auf den griffseitigen Mitnehmerring 6 über die schrägen Flanken 22 auf die Flanken 23 des schalterseitigen Mitnehmerringes 13 und bewegt diesen in die nächste Stellung, in der Zeichnung nach rechts, bis die Noppen 25 in den Ausnehmungen 24 zu liegen kommen.4 and 5, the mutual position of the individual components of the locking mechanism is shown for the moment in which the spring accumulator is tensioned and the switch-side driver ring begins its hand-independent movement. In this position, the rib 11 of the handle-side driving ring 6 abuts the stop rocker 12 and the tips 26 of the saw teeth of the link 14 just come over the tips 27 of the fixed saw teeth at the bottom of the rear housing part 2, so that the link 14 with its saw teeth the tooth gaps of the fixed toothing can occur. As a result, the force of the springs 8 acts on the handle-side driver ring 6 via the inclined flanks 22 on the flanks 23 of the switch-side driver ring 13 and moves it into the next position, to the right in the drawing, until the knobs 25 come to rest in the recesses 24.

Aus Fig. 5 ist ersichtlich, daß hiebei die Schrägflächen 22 des griffseitigen Mitnehmerringes 6 nach wie vor mit denselben Schrägflächen 23 des schalterseitigen Mitnehmerringes 13 zusammenwirken und niemals mit ihren höchsten Erhebungen aneinander vorbeikommen, sondern unter der Krafteinwirkung der Federn 8 wieder in ihre ursprüngliche Relativlage gleiten, und daß der schalterseitige Mitnehmerring 13 auch nicht über diese Ausgangsstellung hinauslaufen kann, weil dazu die Federn 8 wieder gespannt werden müßten.From Fig. 5 it can be seen that the inclined surfaces 22 of the handle-side driver ring 6 still cooperate with the same inclined surfaces 23 of the switch-side driver ring 13 and never get past each other with their highest elevations, but instead slide under the force of the springs 8 back into their original relative position , and that the switch-side driver ring 13 can not run beyond this starting position because the springs 8 would have to be tensioned again.

Nur wenn die Kraft der Federn 8 ausreicht, den schalterseitigen Mitnehmerring 13 zu bewegen, kommen die Rippen 11 des griffseitigen Mitnehmerringes 6 frei und die nächste Schaltbewegung kann gestartet werden. Reicht die Kraft der Federn 8 nicht aus, den schalterseitigen Mitnehmerring 13 zu bewegen, und wird auf das Betätigungselement kein Drehmoment mehr ausgeübt, so wird der griffseitige Mitnehmerring 6 über die Flanken 22 und 23 in die Ausgangsstellung zurückbewegt und damit zeigt das Betätigungselement, das meistens mit einer Anzeigevorrichtung versehen ist, wieder die dem schalterseitigen Mitnehmerring 13 entsprechende Stellung.Only when the force of the springs 8 is sufficient to move the driver-side driving ring 13, the ribs 11 of the handle-side driving ring 6 are released and the next switching movement can be started. If the force of the springs 8 is not sufficient to move the driver-side driver ring 13 and no more torque is exerted on the actuating element, then the handle-side driver ring 6 is moved back over the flanks 22 and 23 into the starting position and thus the actuating element shows, mostly is provided with a display device, the position corresponding to the switch-side driver ring 13.

Aus den Fig. 2 bis 5 ist erkennbar, daß, da die Länge der Anschlagwippe 12, über beide Arme gemessen, größer ist als der Abstand zweier aufeinanderfolgender Rippen 11 des griffseitigen Mitnehmerringes 6, in Abhängigkeit von der Drehrichtung des griffseitigen Mitnehmerringes 6 selbsttätig die richtige Stellung der Anschlagwippen 12 bewirkt wird, weil vor der Möglichkeit des Anschlagens einer Rippe 11 an einem Stirnende einer Anschlagwippe 12 bereits eine vorauseilende Rippe 11 den anderen Arm der Anschlagwippe 12 in die entsprechende Ausnehmung im vorderen Gehäuseteil 1 drückt. Für die andere Drehrichtung kommt dann die in den Fig. 2 und 4 nicht dargestellte andere Kulisse 15 zum Einsatz, deren Sägezahnflanken bezüglich der Kulisse 14 entsprechend gegensinnig ausgebildet sind.From Fig. 2 to 5 it can be seen that, since the length of the stop rocker 12, measured over both arms, is greater than the distance between two successive ribs 11 of the handle-side driver ring 6, depending on the direction of rotation of the handle-side driver ring 6 automatically the right one Position of the stop rockers 12 is effected because before the possibility of attaching a rib 11 to a front end of a stop rocker 12, a leading rib 11 presses the other arm of the stop rocker 12 into the corresponding recess in the front housing part 1. Then for the other direction of rotation comes that in FIGS. 2 and 4 Other backdrop 15, not shown, is used, the sawtooth flanks of which are formed in opposite directions with respect to the backdrop 14.

Claims (12)

  1. A snap detent device for rotary switches with more than two engaged positions, wherein the drive pin (4) is rotatable against the force of an energy storage means, and the engaged position is assumed with an at least partial relaxation of the energy storage means, in which arrangement the energy storage means is formed by at least one axially acting compression spring (8) and acts on driver ring (6) having inclined surfaces in the circumferential direction, which driver ring (6) cooperates with a further driver ring (13) having a corresponding matching profile with inclined surfaces which can be coupled with the drive pin (4), characterized in that between the two driver rings (6, 13) provision is made for a coupling (28, 29) for a dragged entrainment, that the driver ring (6) on the grip side carries stops (11) which cooperate with counter stops (12) fixed to the casing when an engaged position of the detent device has been reached and blook further movement of the driver ring (6), that provision is made for at least one annular connecting member (14, 15) which has on its front faces saw teeth extending in the circumferential direction which are inclined towards the each other in opposite directions, and which cooperates with corresponding matching profiles on the driver ring (6) on the grip side or in the casing (2), and that the driver ring (13) on the switch side is designed with nubs, radial ribs or the like, or recesses and/or radial grooves (24) which cooperate with complementary profiles (25) of the casing (2) formed for this purpose.
  2. A snap detent device according to claim 1, characterized in that the counter stops (12) attached to the casing are pivotably mounted.
  3. A snap detent device according to claim 1 or 2, characterized in that the stops (11) of the driver ring (6) on the grip side are formed by radial ribs which cooperate with pivotable abutting rockers (12) mounted in the casing (2).
  4. A snap detent device according to claim 3, characterized in that the abutting rockers (12) extend over a length in the circumferential direction which is longer than the interspacing measured on the same radius of the radial ribs (11) of the driver ring (6) on the grip side.
  5. A snap detent device according to one of claims 1 to 4, characterized in that for obtaining the coupling for a dragged entrainment between the two coaxially arranged driver rings (6, 13), provision is made on one driver ring (6) for an outer tooth system with teeth (28) that are narrow in the circumferential direction, which teeth engage in tooth gaps (29) that are wide in the circumferential direction of an inner tooth system provided on the other driver ring (13).
  6. A snap detent device according to one of claims 1 to 5, characterized in that the inclined surfaces (22) of the driver ring (6) on the grip side, as well as the inclined surfaces (23) of the driver ring (13) on the switch side cooperating with these inclined surfaces (22) are respectively mutually inclined at the same opposing angles.
  7. A snap detent device according to one of claims 1 to 6, characterized in that the annular connecting member (14, 15) is arranged concentrically with the inclined surfaces (22, 23) of the driver rings (6, 13) and that the connecting member (14, 15) cooperates on its side facing the driver ring (6) on the grip side, and on its end face remote from this driver ring (6) respectively with the corresponding matching profile on the driver ring (6) on the grip side, or in the casing (2).
  8. A snap detent device according to claim 7, characterized in that for each direction of rotation, provision is made for a separate coaxially arranged annular connecting member (14, 15), in which arrangement, the sawteeth of one connecting member (14, 15) have alternately steeper and flatter flanks (19, 20) and that the flatter or steeper flanks of one connecting member extend with an opposite inclination to the flatter or steeper flanks or the other connecting member.
  9. A snap detent device according to claim 7 or 8, characterized in that the driver ring (6) on the grip side has, concentrically with its inclined surfaces cooperating with the driver ring (13) on the switch side, sawtooth-type profiles for each connecting member (14, 15) for rotating the respective connecting member(s).
  10. A snap detent device according to one of claims 1 to 9, characterized in that the nubs, radial ribs or the like, or recesses and/or radial grooves (24) of the driver ring (13) on the switch side are formed on the side remote from the inclined surfaces of the driver ring (6) on the grip side, in which arrangement, the maximum inclination of the flanks of the nubs, radial ribs or the like, or recesses and/or radial grooves (24) is smaller than 80° in the circumferential direction, relative to a plane normal to the axis of the detent device.
  11. A snap detent device according to one of claims 1 to 10, characterized in that the energy storage means is formed by at least three springs (8) arranged on the periphery of the casing whose spring collars (9) engage on the side facing the grip of the switch over the edge of the driver ring (6) on the grip side which is axially displaceable.
  12. A snap detent device according to claim 11, characterized in that the spring collars (9) are formed as sleeves or bushes that are axially displaceable in grooves or bores of the casing (2).
EP90890104A 1989-05-24 1990-04-05 Snap detent device Expired - Lifetime EP0399988B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT126889 1989-05-24
AT1268/89 1989-05-24

Publications (3)

Publication Number Publication Date
EP0399988A2 EP0399988A2 (en) 1990-11-28
EP0399988A3 EP0399988A3 (en) 1991-10-23
EP0399988B1 true EP0399988B1 (en) 1995-04-05

Family

ID=3510209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90890104A Expired - Lifetime EP0399988B1 (en) 1989-05-24 1990-04-05 Snap detent device

Country Status (11)

Country Link
US (1) US5055644A (en)
EP (1) EP0399988B1 (en)
AT (1) ATE120878T1 (en)
AU (1) AU622997B2 (en)
CA (1) CA2013831C (en)
DE (1) DE59008823D1 (en)
DK (1) DK0399988T3 (en)
ES (1) ES2072419T3 (en)
NO (1) NO301858B1 (en)
NZ (1) NZ233210A (en)
YU (1) YU47864B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5310972A (en) * 1992-06-30 1994-05-10 Bremas S.P.A. Snap-action device for cooperating with toothed wheels or the like, in particular for use in electrical change-over or other switches
US8461483B2 (en) * 2009-07-24 2013-06-11 Lincoln Global, Inc. Engine driven welding power supplies with two piece shaft

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE524332C (en) 1927-05-20 1931-05-07 Kontakt Akt Ges Fabrik Elektro Electrical installation rotary switch for right and left switching
US2810029A (en) * 1956-02-01 1957-10-15 Gen Electric Snap acting drum switch
US3718786A (en) * 1971-08-05 1973-02-27 Tri Line Electric Co Inc Rotary switch assembly
US3770926A (en) * 1972-07-27 1973-11-06 Allen Bradley Co Selector switch actuator with part of detent means integral with actuator cam
AT339417B (en) * 1974-04-25 1977-10-25 Naimer H L DEVICE FOR UNCOUPLING A SWITCH DRIVE SHAFT
US4175220A (en) * 1977-12-07 1979-11-20 Westinghouse Electric Corp. Convertible selector switch
US4263486A (en) * 1979-02-21 1981-04-21 Taylor Glenn R Rotary operator
AT374960B (en) * 1980-01-23 1984-06-25 Naimer H L REFRIGERATION
US4737608A (en) * 1987-07-10 1988-04-12 Illinois Tool Works Inc. Convertible rotary switch

Also Published As

Publication number Publication date
CA2013831C (en) 1995-06-13
ES2072419T3 (en) 1995-07-16
EP0399988A2 (en) 1990-11-28
CA2013831A1 (en) 1990-11-24
AU622997B2 (en) 1992-04-30
NZ233210A (en) 1993-02-25
DE59008823D1 (en) 1995-05-11
YU97090A (en) 1994-04-05
YU47864B (en) 1996-02-19
US5055644A (en) 1991-10-08
NO301858B1 (en) 1997-12-15
ATE120878T1 (en) 1995-04-15
DK0399988T3 (en) 1995-07-17
AU5293390A (en) 1990-12-13
EP0399988A3 (en) 1991-10-23
NO902287D0 (en) 1990-05-23
NO902287L (en) 1990-11-26

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