EP0110149A1 - Commutateur électrique - Google Patents

Commutateur électrique Download PDF

Info

Publication number
EP0110149A1
EP0110149A1 EP83110767A EP83110767A EP0110149A1 EP 0110149 A1 EP0110149 A1 EP 0110149A1 EP 83110767 A EP83110767 A EP 83110767A EP 83110767 A EP83110767 A EP 83110767A EP 0110149 A1 EP0110149 A1 EP 0110149A1
Authority
EP
European Patent Office
Prior art keywords
cam part
contact
electrical switch
nose
cam
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.)
Granted
Application number
EP83110767A
Other languages
German (de)
English (en)
Other versions
EP0110149B1 (fr
Inventor
Leopold Hinterberger
Manfred Pfister
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilhelm Ruf KG
Original Assignee
Wilhelm Ruf KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wilhelm Ruf KG filed Critical Wilhelm Ruf KG
Publication of EP0110149A1 publication Critical patent/EP0110149A1/fr
Application granted granted Critical
Publication of EP0110149B1 publication Critical patent/EP0110149B1/fr
Expired legal-status Critical Current

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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
    • H01H19/54—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 the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/62—Contacts actuated by radial cams

Definitions

  • the invention relates to an electrical switch with a pivotable contact bracket, a rotatable actuator for the contact bracket, a contact lug with which the contact bracket can be brought into and out of contact and a soldering lug electrically connected to the contact bracket.
  • switches are generally known and commercially available.
  • the actuator is a jump or overrunning element, which is initially biased only with a spring when the actuator moves and then, after reaching a certain limit position, suddenly in one direction to actuate the switch, ie to open or close it.
  • Such switches are primarily used to switch relatively large electrical currents in which there is a risk of spark formation and thus also of contact erosion. It is therefore important to achieve the fastest possible movement of the control bracket, regardless of the speed of movement of the actuator.
  • the object of the invention is therefore to improve the electrical switch of the type mentioned in such a way that a quick switching movement of the contact bracket is always achieved with simple means and possibly welded contacts are safely separated.
  • the actuator is a cam member having a cam projection and a radially outwardly projecting nose attached to it with a steep side flank, that the contact bracket has an arc pointing towards the cam member and that the contact bracket by a spring is biased towards the cam member.
  • the steepness of the side flank of the nose is such that, in the rotational position of the cam part, in which a first contact occurs between the side flank of the nose and a front flank of the bow of the contact bracket, the front flank of the bow of the contact bow and the side flank of the nose are essentially lie in a line.
  • a particularly large "translation" of the rotary movement of the cam part into a pivoting movement of the contact clip is achieved.
  • a bearing clearance is present between a drive pin which is positively connected to the cam part and a corresponding recess in the cam part in the direction of rotation.
  • the mentioned bearing play is at least so large that the cam part can be rotated relative to the drive pin by such an angular amount that the cam part can rotate from a dead center position to a stable position.
  • This angular amount preferably corresponds approximately the width of the nose, measured as an angle from the pivot point of the cam part. This angular amount is about 3 - 5 °.
  • the spring biasing the contact clip in the direction of the cam part is installed in such a way that its direction of action forms an acute angle with respect to a line running from the pivot point of the cam part to the base point of the spring.
  • the installation position of the spring is preferably such that a force component presses the contact clip in the direction of the soldering lug holding the contact clip. This ensures that the contact clip cannot accidentally jump out of the cutting edge bearing.
  • the cam part, the cam projection and the nose are made from one part, preferably from hard plastic. This prevents wear. In a test sample of the switch according to the invention, after 25,000 operations, no wear impairing the proper function was found. In these tests, inrush currents of 50 A were carried out at a test voltage of 30 V, the contact resistance being less than 80 mJl after 25,000 switching operations.
  • cam part is out of engagement with the contact bracket when the switch is closed, so that no further frictional forces are caused by the switch when the drive pin rotates further, for example for an attached potentiometer.
  • FIGS. 1 and 4 The same reference numerals in the individual drawings designate the same parts.
  • the switch has a substantially cuboid housing 2 with a housing base 4 and vertically upwardly projecting side walls 6.
  • a cylindrical bearing pin 8 projects vertically upward from the housing base 4, but not up to the height of the upper edge of the side walls 6. From the two side walls 6 project mutually opposite projections 10 into the interior of the switch housing.
  • approximately L-shaped webs 12 protrude from the wall of the housing adjacent to the two side walls 6, so that one leg of these webs 12 is at a distance from each of the projections 10.
  • An intermediate space is thus present between the respective projection 10 and the associated web 12, in which a contact tab 14 or a solder tab 20 is clamped.
  • the lower housing wall has 2 grooves for receiving the contact tab 14 or the solder tab 20.
  • a projection also projects upward from the housing base 4, which protrudes into a corresponding recess on the underside of the contact lug 14 or the soldering lug 20 protrudes and thus also holds these two flags in their axial direction.
  • the two flags are secured against falling out by a housing closing plate 50 (FIG. 3).
  • a contact bracket 18 is held on the solder tab 20 via a cutting edge bearing 22.
  • the contact clip 18 extends from the soldering tab 20 holding it to the contact tab 14, which is bent in an L-shape at its end located in the housing and has a contact 16 on the side opposite the end of the contact clip 18, for example in the form of a pressed-in spherical cap.
  • the contact bracket 18 has an arc 40 pointing in the direction of the bearing journal 8, which opens out via its side flanks (41) into the essentially straight-line parts of the contact bracket.
  • the contact bracket 18 has a taper 24, which serves to center a spring 26, which is designed here as a helical spring.
  • This spring 26 is held in a guide 28 which is formed by the two webs 12.
  • the central axis of the spring is inclined at an angle ⁇ with respect to a line which connects the base point of the spring with the center of the pivot.
  • the angle ⁇ is here. an acute angle, the spring being inclined so that a force component presses the contact clip 18 in the direction of the solder tab 20. However, the main force component presses the contact bracket 18 in the direction of the bearing pin 8.
  • a cam part 30 is rotatably mounted on the journal 8.
  • the cam part 30 has a cam projection 32, the radially outward-facing side of which has a radius of curvature which is essentially the radius from the center of the journal 8 to the radially outer side Side of the cam projection 32 corresponds.
  • On one side of the cam projection 32 there is a nose 34 which projects radially outwards and has a relatively small radius of curvature. The nose opens on one side into a steep side flank 35 of the cam projection and on its other side into the radially outer side of the cam projection 32.
  • the cam part 30 has a circular, central bore 38 which is adapted to the diameter of the bearing pin 8. However, this bore does not go completely through the cam part 30. Rather, this bore opens into a recess 36, which allows a positive connection with a drive pin 48. In the exemplary embodiment shown, this recess has two rectilinear walls which run parallel and opposite one another and which run as a secant to the circle of the bore 38.
  • a bearing play is provided between the drive pin 48 and the recess 36, which allows the cam part 30 to be pivoted by the angle ⁇ when the drive pin is held in place.
  • This angle ⁇ corresponds approximately to the width of the nose 34, measured as an angle from the center of the bearing pin 8.
  • the housing 2 also has fastening bores 44 and 46, of which the bores 44 are through bores and, in the exemplary embodiment shown, the bores 46 are designed as blind bores.
  • the housing wall has corresponding thickenings in the area of these bores.
  • Fig. 1 the switch is open, the arch 40 of the contact bracket 18 is supported on the outside of the cam projection 32 and by the force of the Spring 26 is pressed against this.
  • the cam member is rotated clockwise in Fig. 1.
  • the nose 34 engages with the arc and presses the contact clip downward a little.
  • the radially outermost part of the nose 34 has reached the apex of the arc 40, the downward movement of the contact bracket 18 is ended and a "dead center position" is reached.
  • the cam part 30 is rotated counterclockwise until the position shown in FIG. 4 is reached, in which the two side flanks 35 and 41 come into contact with one another. In this position, these side flanks 35 and 41 are essentially in a line.
  • the contact bracket 18 is pressed down by the nose 34, whereby the electrical contact is opened. Due to the steepness of the side flanks 35 and 41, rotation of the cam part 30 by a very small angular amount is sufficient to achieve the full stroke for opening the switch. Any sparks between the contacts that are opening are caused by the rapidly increasing distance quickly deleted.
  • the cam part snaps back into the position shown in FIG. 1 due to the bearing play, the audible and tactile click effect again occurring.
  • Fig. 2 shows the switch of the invention in combination with a rotary potentiometer.
  • the housing 2 of the switch is closed by a housing closing plate 50, only one opening being provided for the drive pin 48.
  • This drive pin is part of a rotary shaft 58, on which grinders 56 for the rotary potentiometer are also attached.
  • the rotary shaft 58 is mounted in a potentiometer housing 60.
  • a shielding plate 52 is provided adjacent to the insulating plate 50, to which a resistance plate 54 of the rotary potentiometer is then attached.
  • the corresponding contacts of the rotary potentiometer are accessible via soldering lugs 66, 68 and 70, which protrude in the same direction as the soldering lug 20 or the contact lug 14.
  • the potentiometer '60, the resistance plate 54, the shielding plate 52, the insulating plate 50 and the switch casing 2 are interconnected via two rivets (see. The bores 44 in Fig. L). Corresponding bores of the resistance plate 54 can be seen from FIG. 3.
  • a radially outwardly projecting stop 72 is attached, which comes to a stop against a corresponding counter-stop in the potentiometer housing 60 and thus defines the limit described above for the rotary movement of the switch.
  • the switch can be switched on and off by rotating the rotary shaft 58 and, in addition, the rotary potentiometer can be actuated when the switch is switched on.
  • This rotary potentiometer can have, for example, the resistance tracks 62 and 64 shown in FIG. 3, which are in contact with the grinders 56.
  • the cutting edge bearing 22 has a self-cleaning effect between the contact bracket 18 and the soldering lug 20, which increases the functional reliability.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Mechanisms For Operating Contacts (AREA)
EP83110767A 1982-11-23 1983-10-27 Commutateur électrique Expired EP0110149B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3243323A DE3243323C2 (de) 1982-11-23 1982-11-23 Elektrischer Schalter
DE3243323 1982-11-23

Publications (2)

Publication Number Publication Date
EP0110149A1 true EP0110149A1 (fr) 1984-06-13
EP0110149B1 EP0110149B1 (fr) 1986-01-29

Family

ID=6178824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110767A Expired EP0110149B1 (fr) 1982-11-23 1983-10-27 Commutateur électrique

Country Status (4)

Country Link
EP (1) EP0110149B1 (fr)
DE (2) DE3243323C2 (fr)
ES (1) ES285289Y (fr)
YU (1) YU44756B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20100019A1 (it) * 2010-01-15 2011-07-16 Comparato Nello S R L Sistemi Idrotermici Accoppiamento tra camma e albero di uscita di un motoriduttore ad ingranaggi per controllare l'apertura e la chiusura di valvole in impianti idraulici e/o idrotermici

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4233520C1 (de) * 1992-10-06 1994-06-01 Teves Gmbh Alfred Elektrischer Drehschalter, insbesondere Zünd-/Startschalter für Kraftfahrzeuge
DE4237753C1 (de) * 1992-11-09 1994-05-26 Teves Gmbh Alfred Elektrischer Drehschalter, insbesondere Zünd-/Startschalter für Kraftfahrzeuge
DE4330310A1 (de) * 1993-09-08 1995-03-09 Teves Gmbh Alfred Drehschalter mit Schleifkontaktgabe auf zylinderförmig gewölbten Schleifkontakten

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT165780B (fr) *
DE972755C (de) * 1952-11-13 1959-09-17 Stotz Kontakt Gmbh Elektrische Nockenschalter, deren Kontakthebel radial zur Schaltachse von aus einer Presskoerpereinheit bestehenden Nockenscheiben gesteuert werden
US3497643A (en) * 1967-05-12 1970-02-24 United Carr Inc Rotary switch
DE7421243U (de) * 1974-06-21 1975-04-03 Ruf W Kg Einpoliger Schalter
FR2341192A1 (fr) * 1976-02-16 1977-09-09 Seima Commutateur d'eclairage fonctionnant par impulsions, pour vehicules automobiles ou analogues
US4103132A (en) * 1976-10-05 1978-07-25 Unimax Switch Corporation Rotary switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1050862B (fr) *
DE1218040B (de) * 1964-07-08 1966-06-02 Busch Jaeger Duerener Metall Elektrischer Zugschalter
FR1516928A (fr) * 1967-01-16 1968-02-05 Perfectionnements aux interrupteurs de potentiomètres
DE2451034C3 (de) * 1974-10-26 1980-08-14 J. & J. Marquardt, 7201 Rietheim Elektrischer Schalter
DE2832921C2 (de) * 1978-07-27 1981-10-08 Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. Gmbh & Co, 8740 Bad Neustadt Elektrischer Schalter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT165780B (fr) *
DE972755C (de) * 1952-11-13 1959-09-17 Stotz Kontakt Gmbh Elektrische Nockenschalter, deren Kontakthebel radial zur Schaltachse von aus einer Presskoerpereinheit bestehenden Nockenscheiben gesteuert werden
US3497643A (en) * 1967-05-12 1970-02-24 United Carr Inc Rotary switch
DE7421243U (de) * 1974-06-21 1975-04-03 Ruf W Kg Einpoliger Schalter
FR2341192A1 (fr) * 1976-02-16 1977-09-09 Seima Commutateur d'eclairage fonctionnant par impulsions, pour vehicules automobiles ou analogues
US4103132A (en) * 1976-10-05 1978-07-25 Unimax Switch Corporation Rotary switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20100019A1 (it) * 2010-01-15 2011-07-16 Comparato Nello S R L Sistemi Idrotermici Accoppiamento tra camma e albero di uscita di un motoriduttore ad ingranaggi per controllare l'apertura e la chiusura di valvole in impianti idraulici e/o idrotermici

Also Published As

Publication number Publication date
YU44756B (en) 1991-02-28
ES285289U (es) 1985-09-01
ES285289Y (es) 1988-07-01
DE3243323C2 (de) 1985-03-07
YU228783A (en) 1986-02-28
DE3243323A1 (de) 1984-05-24
EP0110149B1 (fr) 1986-01-29
DE3362039D1 (en) 1986-03-13

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