EP0297498B1 - Pulse generator - Google Patents
Pulse generator Download PDFInfo
- Publication number
- EP0297498B1 EP0297498B1 EP88110268A EP88110268A EP0297498B1 EP 0297498 B1 EP0297498 B1 EP 0297498B1 EP 88110268 A EP88110268 A EP 88110268A EP 88110268 A EP88110268 A EP 88110268A EP 0297498 B1 EP0297498 B1 EP 0297498B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leaf spring
- contact
- pulse generator
- gear wheel
- disposed
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/005—Electromechanical pulse generators
Definitions
- the present invention relates to a pulse generator according to the preamble of claim 1.
- the present invention is concerned inter alia with the task of designing a pulse generator in such a way that false pulses, such as additional pulses due to contact bruises, are avoided, the pulse generator is simple in construction, efficient to manufacture and a compact design is possible.
- a housing part made of insulating material or metal which is advantageously designed in the form of a box lid or a trough and has two end faces 2 and 3, two side walls 4 and 5 and a bottom 6.
- a gear 7 is provided, which with its axis of rotation 8 in an opening 9 made in the bottom 6, e.g. a bearing bush 10 attached or molded on the outside of the base 6 is rotatably mounted.
- a leaf spring 12 is attached vertically in the direction of the center point 11 of the gear 7, the upper end 13 of which is fastened in a fastening block 14 attached to the upper end face 2, in particular molded on.
- the attachment takes place, for example, by pressing in or deforming the attachment block 14, for example by squeezing or hot forming.
- the lower end 15 of the leaf spring 12 projects into the uppermost tooth space 16 of the gear 7 in the rest position and thus determines a locked rest position of the gear 7.
- two transverse slides 17 and 18 are arranged displaceably mounted perpendicular to the leaf spring 12. These can be arranged side by side, but preferably, as in the exemplary embodiment, one above the other.
- two guide tabs 19 are provided on the bottom 6 and / or on the side walls 4 and 5, each extending from the outside inwards perpendicular to the leaf spring 12.
- the guide tabs 19 on each side have a distance from one another which corresponds to the thickness of the two cross slides 17, 18 plus a small gap in the form of a plus tolerance, so that the cross slides 17, 18 used are mounted so as to be easily displaceable with as little play as possible.
- the cross slide 17 and 18 are each provided with a recess 20 and 21, in which the leaf spring 12 engages.
- the recesses 20, 21 of the cross slide 17, 18 are arranged such that they are offset from one another in such a way that in the rest position of the leaf spring 12 and the toothed wheel 7, the end edges 22 and 23 of the recesses 20 and 21 facing the leaf spring 12 are at a short distance 24 from the leaf spring 12 are located. As a result, no vibrations of the leaf spring 12 can be transmitted to the cross slide 17 and 18 in the idle state.
- a contact spring band 25 and 26 is arranged almost parallel to the leaf spring 12 on both sides thereof.
- the contact spring strips 25 and 26 are fastened, for example molded, with their lower ends 27 or 28 in the end face 3 or, according to the exemplary embodiment, in the end wall 29 of a base part 30.
- the bottom part 30 can be pushed into the housing part 1 or plugged onto it, so that a box-shaped housing is formed. This connection can be done by latching and / or gluing and / or welding, for example by means of ultrasound.
- the upper ends 31 and 32 of the contact spring strips 25 and 26 each have a movable contact 33 and 34 on both sides.
- Each movable contact 33, 34 is assigned two fixed contacts 35 and 36 or 37 and 38, the fixed contacts 35 and 37 with the associated movable contact 33 and 34, respectively, a normally closed contact, that is to say a closed contact pair in the rest position, and the fixed contacts 36 and 38 with the respectively associated movable contact 33 and 34, respectively, form a switching contact, that is to say a closed contact pair in the switching state .
- the cross slides 17 and 18 each have a stop edge 39 or 40, which can be formed by a recess in the cross slide 17 or 18.
- the stop edges 39 and 40 can, however, also extend from the contact spring strips 25, 26 lying in another, but parallel plane reaching stop arms 41 and 42 of the cross slide 17 and 18 or by incisions on correspondingly wide cross slides.
- the length of the cutouts 20 and 21 in the cross slides 17 and 18 is dimensioned such that with maximum deflection of the one cross slide 17 or 18 due to maximum deflection of the leaf spring 12 by the gear 7, the end edge 44 or 43 of the cutout 20 or 21 of the other cross slide 18 or 17 is not touched.
- connection contacts 45 protruding through the base part 30, each of which is connected to an inner contact part, for example the contact spring strip 25 or 26 or one of the fixed contacts 35 to 38, or forms a structural unit with these.
- the connection contacts 45 can also be a Penetrate the side wall or an end face of the housing part 1 and protrude outwards.
- the operation of the pulse generator according to the invention is as follows: If the gear wheel 7 is rotated clockwise in FIG. 1, the leaf spring 12 is deflected to the right by the tooth located on the left of it. It strikes the end edge 22 of the cross slide 17 and shifts it to the right. As a result, the stop edge 39 of the cross slide 17 comes into operative connection with the contact spring band 26 and the latter is likewise deflected to the right against its own spring force. The left movable contact 34 lifts off the fixed contact 37 on which it previously rested under pretension. Finally, the right movable contact 34 is pressed against the fixed contact 38 and this pair of contacts is closed.
- the contact spring band 26 is bent a little to the right until the lower end 15 of the leaf spring 12 springs back over the tooth edge into the tooth gap to the left of the actuating tooth and springs in the rest position or approximately in the rest position.
- the cross slide 17 is released and the contact spring band 26 can spring back from its switching position into the rest position by internal stress. Any reverberations of the leaf spring 12 do not have any effect in the form of a switching operation because they cannot influence the cross slide 17 because of the distance of the leaf spring 12 from the inner end edge 22.
- a corresponding process is triggered when the gear 7 rotates counterclockwise with the cross slide 18, the contact spring band 25 and the contacts 33, 35 and 36.
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Abstract
Description
Die vorliegende Erfindung bezieht sich auf einen Impulsgenerator gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a pulse generator according to the preamble of claim 1.
Bei derartigen aus den DE-OS 31 36 598 und 33 26 308 bekannten Impulsgeneratoren sind die beweglichen Kontakte unmittelbar an der Blattfeder angebracht, die mit den zugeordneten Festkontakten je ein Kontaktpaar bilden.In such pulse generators known from DE-OS 31 36 598 and 33 26 308, the movable contacts are attached directly to the leaf spring, each of which forms a pair of contacts with the associated fixed contacts.
Da die Blattfeder insbesondere bei langsamer Betätigung zu Prellschwingungen neigt, kann es vorkommen, daß, obwohl nur eine Drehbewegung um einen Zahn vorgenommen wurde, zwei oder mehrere Kontaktschlüsse auftreten.Since the leaf spring tends to bounce vibrations particularly when operated slowly, it can happen that, although only one rotary movement has been made around a tooth, two or more contact closures occur.
Die vorliegende Erfindung befaßt sich unter anderem mit der Aufgabe, einen Impulsgenerator so zu gestalten, daß falsche Impulse, wie Zusatzimpulse durch Kontaktprellungen, vermieden werden, der Impulsgenerator einfach im Aufbau, rationell zu fertigen und eine kompakte Bauweise möglich ist.The present invention is concerned inter alia with the task of designing a pulse generator in such a way that false pulses, such as additional pulses due to contact bruises, are avoided, the pulse generator is simple in construction, efficient to manufacture and a compact design is possible.
Diese Aufgabe ist durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst. Durch die Verwendung von Querschiebern mit Aussparungen werden Nachschwingungen der Blattfeder nicht auf die Querschieber und damit auch nicht auf die Kontakte übertragen. Durch die Anordnung der Querschieber ist kein großer Platzbedarf notwendig, so daß ein Impulsgenerator kleiner Abmessungen hergestellt werden kann. Weitere vorteilhafte Einzelheiten der Erfindung sind in den Unteransprüchen angegeben und nachfolgend anhand eines in der Zeichnung veranschaulichten Ausführungsbeispiels beschrieben. Es zeigen:
- Fig. 1
- eine Draufsicht auf den Impulsgenerator gemäß dem Schnitt A-A der Fig. 2 und
- Fig. 2
- eine Seitenansicht gemäß dem Schnitt B-B der Fig. 1.
- Fig. 1
- a plan view of the pulse generator according to the section AA of FIGS. 2 and
- Fig. 2
- 2 shows a side view according to section BB of FIG. 1.
Mit 1 ist ein Gehäuseteil aus Isoliermaterial oder Metall bezeichnet, das vorteilhaft in Form eines Schachteldeckels oder einer Wanne ausgebildet ist und zwei Stirnseiten 2 und 3, zwei Seitenwände 4 und 5 und einen Boden 6 aufweist. Im unteren Teil des Bodens 6 ist ein Zahnrad 7 vorgesehen, das mit seiner Drehachse 8 in einer im Boden 6 angebrachten Öffnung 9, z.B. einer außen am Boden 6 angebrachten oder angeformten Lagerbuchse 10, drehbar gelagert ist.1 designates a housing part made of insulating material or metal, which is advantageously designed in the form of a box lid or a trough and has two
Oberhalb des Zahnrades 7 ist senkrecht eine in Richtung zum Mittelpunkt 11 des Zahnrades 7 weisende Blattfeder 12 angebracht, deren oberes Ende 13 in einem an der oberen Stirnseite 2 angebrachten, insbesondere angeformten Befestigungsblock 14 befestigt ist. Die Befestigung erfolgt beispielsweise durch Einpressen oder Verformung des Befestigungsblockes 14 z.B. durch Quetschen oder Warmverformung. Das untere Ende 15 der Blattfeder 12 ragt in Ruhestellung in die oberste Zahnlücke 16 des Zahnrades 7 und bestimmt so eine verrastete Ruhestellung des Zahnrades 7.Above the
Zwischen dem Zahnrad 7 und dem Befestigungsblock 14 sind zwei senkrecht zur Blattfeder 12 verschiebbar gelagerte Querschieber 17 und 18 angeordnet. Diese können nebeneinander, vorzugsweise aber, wie beim Ausführungsbeispiel, übereinander angeordnet sein. Zur verschiebbaren Lagerung derselben sind am Boden 6 und/oder an den Seitenwänden 4 und 5 jeweils zwei von außen nach innen senkrecht zur Blattfeder 12 verlaufende Führungslaschen 19 vorgesehen. Die Führungslaschen 19 auf je einer Seite besitzen einen Abstand voneinander, der der Dicke der beiden Querschieber 17, 18 plus einem geringen Spalt in Form einer Plustoleranz entspricht, so daß die eingesetzten Querschieber 17, 18 mit möglichst geringem Spiel leicht verschiebbar gelagert sind.Between the
Die Querschieber 17 und 18 sind je mit einer Aussparung 20 bzw. 21 versehen, in welche die Blattfeder 12 eingreift. Die Aussparungen 20, 21 der Querschieber 17, 18 sind derart gegeneinander versetzt angeordnet, daß sich in Ruhestellung der Blattfeder 12 und des Zahnrades 7 die jeweils der Blattfeder 12 zugewandten Endkanten 22 und 23 der Aussparungen 20 bzw. 21 in geringem Abstand 24 zur Blattfeder 12 befinden. Dadurch können sich im Ruhezustand keine Schwingungen der Blattfeder 12 auf die Querschieber 17 und 18 übertragen.The
In der gleichen oder, wie beim Ausführungsbeispiel, in einer anderen Ebene als die Blattfeder 12 ist zu beiden Seiten derselben je ein Kontaktfederband 25 und 26 nahezu parallel zur Blattfeder 12 angeordnet. Die Kontaktfederbänder 25 und 26 sind mit ihrem unteren Ende 27 bzw. 28 in der Stirnseite 3 oder gemäß dem Ausführungsbeispiel in der Stirnwand 29 eines Bodenteils 30 befestigt, z.B. eingeformt. Das Bodenteil 30 kann in das Gehäuseteil 1 eingeschoben oder auf dieses aufgesteckt sein, so daß ein schachtelförmiges Gehäuse gebildet wird. Diese Verbindung kann durch Rastung und/oder Kleben und/oder Verschweißung, z.B. mittels Ultraschall, erfolgen. Das obere Ende 31 bzw. 32 der Kontaktfederbänder 25 und 26 trägt beidseitig je einen beweglichen Kontakt 33 bzw. 34. Jedem beweglichen Kontakt 33, 34 sind je zwei Festkontakte 35 und 36 bzw. 37 und 38 zugeordnet, wobei der die Festkontakte 35 und 37 mit dem jeweils zugeordneten beweglichen Kontakt 33 bzw. 34, jeweils einen Ruhekontakt, also ein in Ruhelage geschlossenes Kontaktpaar, und die Festkontakte 36 und 38 mit dem jeweils zugeordneten beweglichen Kontakt 33 bzw. 34, jeweils einen Schaltkontakt, also ein im Schaltzustand geschlossenes Kontaktpaar bilden.In the same or, as in the exemplary embodiment, in a different plane than the
Die Querschieber 17 und 18 besitzen je eine Anschlagkante 39 bzw. 40, die durch eine Aussparung im Querschieber 17 bzw. 18 gebildet sein können Die Anschlagkanten 39 und 40 können aber auch von zu den in einer anderen, aber parallelen Ebene liegenden Kontaktfederbändern 25, 26 reichenden Anschlagarmen 41 bzw. 42 der Querschieber 17 bzw. 18 oder durch Einschnitte an entsprechend breiten Querschiebern gebildet sein.The cross slides 17 and 18 each have a
Die Länge der Aussparungen 20 und 21 in den Querschiebern 17 bzw. 18 ist derart bemessen, daß bei maximaler Auslenkung des einen Querschiebers 17 oder 18 infolge maximaler Auslenkung der Blattfeder 12 durch das Zahnrad 7 die Endkante 44 bzw. 43 der Aussparung 20 bzw. 21 des jeweils anderen Querschiebers 18 bzw. 17 nicht berührt wird.The length of the
Die Kontaktierung der Kontakte des Impulsgenerators erfolgt über durch das Bodenteil 30 hindurchragende Anschlußkontakte 45, die mit je einem inneren Kontaktteil, also z.B. dem Kontaktfederband 25 oder 26 oder einem der Festkontakte 35 bis 38, verbunden sind oder mit diesen eine bauliche Einheit bilden. Die Anschlußkontakte 45 können auch eine Seitenwand oder eine Stirnseite des Gehäuseteils 1 durchdringen und nach außen ragen.The contacting of the contacts of the pulse generator takes place via
Die Wirkungsweise des erfindungsgemäßen Impulsgenerators ist folgende:
Wird das Zahnrad 7 in Fig. 1 in Uhrzeigersinn gedreht, so wird die Blattfeder 12 vom links von ihr befindlichen Zahn nach rechts ausgelenkt. Dabei schlägt sie an der Endkante 22 des Querschiebers 17 an und verschiebt diesen nach rechts. Hierdurch kommt die Anschlagkante 39 des Querschiebers 17 mit dem Kontaktfederband 26 in Wirkverbindung und letzteres wird ebenfalls entgegen der eigenen Federkraft nach rechts ausgelenkt. Dabei hebt der linke bewegliche Kontakt 34 vom Festkontakt 37, auf dem er vorher unter Vorspannung auflag, ab. Schließlich wird der rechte bewegliche Kontakt 34 gegen den Festkontakt 38 gedrückt und dieses Kontaktpaar geschlossen. Dabei wird das Kontaktfederband 26 etwas nach rechts durchgebogen, bis das untere Ende 15 der Blattfeder 12 über die Zahnkante in die links des betätigenden Zahnes vorhandene Zahnlücke zurück und in Ruhelage oder etwa in Ruhelage federt. Dabei wird der Querschieber 17 freigegeben und das Kontaktfederband 26 kann durch Eigenspannung aus seiner Schaltlage in die Ruhelage zurückfedern. Etwaige Nachschwingungen der Blattfeder 12 wirken sich dabei nicht in Form eines Schaltvorgangs aus, weil sie wegen des Abstandes der Blattfeder 12 von der inneren Endkante 22 den Querschieber 17 nicht beeinflussen können. Ein entsprechender Vorgang wird bei Drehung des Zahnrades 7 entgegen dem Uhrzeigersinn mit dem Querschieber 18, dem Kontaktfederband 25 und den Kontakten 33, 35 und 36 ausgelöst.The operation of the pulse generator according to the invention is as follows:
If the
Claims (11)
- Pulse generator with at least two contact pairs (33, 35; 33, 36 and 34, 37; 34, 38), a gear wheel (7) and a leaf spring (12), the one end (15) of which, in the rest position, clicks into engagement in a tooth space (16) of the gear wheel (7), at least one of the contact pairs (33, 35; 33, 36 and 34, 37; 34, 38) being disposed on each aide of the leaf spring (12), characterized in that there are allocated to the leaf spring (12) two transverse slides (17, 18) which are displaceable in the direction of deflection of the leaf spring (12) and capable of being actuated by the latter and that one transverse slide (17 or 18) is capable of being brought into an operative connection with, in each case, the at least one of the contact pairs (33, 35; 33, 36 or 34, 37; 34, 38).
- A pulse generator as claimed in Claim 1, characterized in that the transverse slides (17, 18) disposed above each other each comprise a recess (20 and 21 respectively) which are offset in relation to each other in such a way that, in the rest position of the gear wheel (7), the end edges (22, 23) of the recesses (20 and 21) facing towards the leaf spring (12) are at a slight distance from the leaf spring (12).
- Pulse generator as claimed in Claim 1 or 2, characterized in that the leaf springs (12) and the contact spring strips (25, 26) of the contact pairs (33, 35; 33, 36 and 34, 37; 34, 38 respectively) which are capable of being actuated by the transverse slide (17, 18) are disposed essentially parallel to each other.
- Pulse generator as claimed in Claim 3, characterized in that the leaf springs (12) and the contact spring strips (25, 26) are disposed in one plane.
- Pulse generator as claimed in Claim 3, characterized in that the leaf spring (12) and the contact spring strips (25, 26) are disposed in different planes.
- Pulse generator as claimed in any one of Claims 1 to 5, characterized in that a housing part (1) of an essentially box-shaped housing comprises, on a front side (2), a fixing block (14) in which the leaf spring (12) is attached by its end, that this housing part (1) comprises in the bottom (6) an aperture (9) for the rotating axle (8) of the gear wheel (7) and the leaf spring (12) runs towards the mid-point (11) of the rotating axle (8) and that, between the gear wheel (7) and the fixing block(14) of the side walls (4, 5) of the housing part (1) there are disposed, perpendicularly to the leaf spring (12), inward-pointing guide strips (19) for the transverse slides (17, 18), between which the transverse slides (17, 18) are displaceably supported.
- Pulse generator as claimed in Claim 6, characterized in that there are disposed on each side wall (4, 5), with positive tolerance, two guide stripe (19) spaced apart by the thickness of the two transverse slides (17, 18).
- Pulse generator as claimed in any one of Claims 1 to 7, characterized in that an outward-projecting bearing bushing (10) is attached to the housing part (1).
- Pulse generator as claimed in any one of Claims 1 to 8, characterized in that the bearing bushing (10) is moulded to the housing part (1).
- Pulse generator as claimed in any one of Claims 1 to 9, characterized in that the movable contact(s) (33, 34) of each contact pair is/are disposed it the one end (31, 32) of the contact spring strip (25 and 26 respectively) and the other ends (27, 28) of the contact spring strips are fastened on a front side (3) of the housing part (1) adjacent to the gear wheel (7) or on a bottom part (6) and the contact pairs are disposed in the housing section between the transverse slides (17 and 18) and the front side (2) provided with the fixing block (14).
- Pulse generator as claimed in Claim 10, characterized in that each contact spring strip (25, 26) is connected to or forms a structural unit with a connecting contact (45) projecting through the front side (3 and/or 2) or the bottom part (30).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88110268T ATE86785T1 (en) | 1987-06-30 | 1988-06-28 | PULSE GENERATOR. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3721460 | 1987-06-30 | ||
DE19873721460 DE3721460A1 (en) | 1987-06-30 | 1987-06-30 | PULSE GENERATOR |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0297498A2 EP0297498A2 (en) | 1989-01-04 |
EP0297498A3 EP0297498A3 (en) | 1989-10-11 |
EP0297498B1 true EP0297498B1 (en) | 1993-03-10 |
Family
ID=6330526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88110268A Expired - Lifetime EP0297498B1 (en) | 1987-06-30 | 1988-06-28 | Pulse generator |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0297498B1 (en) |
AT (1) | ATE86785T1 (en) |
DE (2) | DE3721460A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3326308A1 (en) * | 1983-07-21 | 1985-01-31 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | PULSE GENERATOR |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1219499A (en) * | 1968-10-31 | 1971-01-13 | Int Computers Ltd | Improvements in or relating to direction sensitive pulsing switches |
DE2658105B2 (en) * | 1976-12-22 | 1979-03-22 | Diehl Gmbh & Co, 8500 Nuernberg | Contact controlled pulse generator |
-
1987
- 1987-06-30 DE DE19873721460 patent/DE3721460A1/en not_active Withdrawn
-
1988
- 1988-06-28 AT AT88110268T patent/ATE86785T1/en not_active IP Right Cessation
- 1988-06-28 DE DE8888110268T patent/DE3879008D1/en not_active Expired - Fee Related
- 1988-06-28 EP EP88110268A patent/EP0297498B1/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3326308A1 (en) * | 1983-07-21 | 1985-01-31 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | PULSE GENERATOR |
Also Published As
Publication number | Publication date |
---|---|
EP0297498A3 (en) | 1989-10-11 |
DE3879008D1 (en) | 1993-04-15 |
DE3721460A1 (en) | 1989-01-12 |
ATE86785T1 (en) | 1993-03-15 |
EP0297498A2 (en) | 1989-01-04 |
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