EP0708464B1 - Elektrischer Schalter - Google Patents
Elektrischer Schalter Download PDFInfo
- Publication number
- EP0708464B1 EP0708464B1 EP95115666A EP95115666A EP0708464B1 EP 0708464 B1 EP0708464 B1 EP 0708464B1 EP 95115666 A EP95115666 A EP 95115666A EP 95115666 A EP95115666 A EP 95115666A EP 0708464 B1 EP0708464 B1 EP 0708464B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- arm
- activating
- contact bridge
- activating element
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
- H01H15/02—Details
- H01H15/06—Movable parts; Contacts mounted thereon
- H01H15/10—Operating parts
- H01H15/102—Operating parts comprising cam devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/20—Driving mechanisms
Definitions
- the invention relates to an electrical switch according to the Preamble of claim 1.
- Such switches can be single or multi-pole occurrence. They are considered especially when it comes to electric hand tools Mains switch inserted.
- From DE-OS 40 11 875 is an electrical switch known in which two contact systems in one housing are arranged. A is used to switch the contact systems Actuator that can be actuated against a compression spring.
- the Contact system consists of a seesaw-shaped, on a as Contact-bearing cutting edge rotatably mounted Contact bridge and one with the contact bridge interacting fixed contact. Switching the Contact system is created by means of a Resetting force movable towards the contact bridge on Actuator arranged actuating cam Actuation of the actuator is effected.
- the actuator has in the upper Area on a shot in which the actuation cam under Action of a compression spring is guided horizontally.
- the actuator can lead to management problems of the actuating cam, which can jam. In such a case there is no switchover of the Contact system instead.
- the manufacturing and assembly of recording and actuation cam complex In addition, the manufacturing and assembly of recording and actuation cam complex.
- the invention has for its object the arrangement of Actuating cam on the actuator in such a Simplify switches and improve their operational safety increase.
- the contact bridge of the contact system as a two-armed Lever be formed, with a first lever arm switching contact interacting with the fixed contact is arranged.
- The is in the unactuated state Actuation cams on the other second lever arm.
- the the Actuating cam-bearing arm can act as a one-armed lever be formed, the fulcrum of the bearing is formed on the actuator.
- the actuation cam is on the arm at such a distance from the bearing arranged that this just in the unactuated state second lever arm of the contact bridge.
- the bearing point of the arm on the actuator can by a in a slot engaging pin are formed, wherein the elongated hole is larger in cross section than the tenon is trained. This allows the arm to operate in addition to the pivoting movement, a movement in the direction of the actuator. This causes a kind of Cascade effect on, causing an increase in contact force with abrupt contact force build-up between the switching and Fixed contact is achieved when switching the contact bridge.
- the lifespan is also increased.
- the Contact system is even for slow ones Actuation speeds suitable because of the contact force is suddenly built up due to a cascade effect. In addition, a burn on the contacts and a this causes premature failure of the switch prevented.
- the contact system in the switch according to the invention can be miniaturize and still assemble easily.
- Power tool switches can be larger Inrush current peaks caused by the inductance of the Electric motor are caused, even with reduced Contact surface without welding or damaging the Contacts are managed. Consequently, the switch can overall have smaller dimensions.
- the number of parts for the contact systems reduced, which in turn is less expensive to manufacture of the switch means.
- an electrical switch 1 is shown, the especially as a power switch in electrical hand tools can be used.
- the switch 1 has an approximately Pot-shaped housing 2, inside of which a contact system 3 is arranged.
- the housing 2 is at the top Cover 7 completed, to achieve good dust and Moisture-tightness by means of approaches 8 in one on the edge of the housing 2 engages circumferential groove 9.
- In the housing 2 there is a linearly actuable actuator 4 for Switching the contact system 3.
- the actuator 4 protrudes with a pusher 6 out of the housing 2.
- a Recording on the actuator 4 is at the bottom 11 of the Housing 2 supporting compression spring 5 used such that when the actuator 4 is actuated by the pusher 6 a restoring force acts on the actuator 4.
- the area of the pusher 6 is on the cover 7 elastic bell-shaped bellows 10, with its help the area on the cover 7 is sealed at which the Pusher 6 penetrates the cover 7.
- the contact system 3 consists of a rocker-shaped Contact bridge 12, which acts as a contact bearing Cutting edge 13 is rotatably mounted.
- the cutting edge 13 stands with an electrical located on one side of the housing 2 Connection 15 in connection.
- the contact bridge 12 acts Fixed contact 14 together, the one in the housing 2nd extending contact rail with another electrical Port 16 on the other side of the housing 2 in connection stands.
- the rocker-shaped contact bridge 12 a first, with a Switch contact 17 provided lever arm 18 and a second Lever arm 19.
- the two lever arms 18, 19 are by a Intermediate area 20 connected to each other.
- On the side of this Intermediate area 20 there are bulges 21, with their Help the contact bridge 12 movable on the cutting edge 13 is stored.
- the contact bridge 12 is over the Cutting edge 13 is electrically connected to the terminal 15, so that the bulges 21 and the cutting edge 13 a contact bearing form.
- a compression spring 25 is in with one end a receptacle 26 on the actuator 4 and with the other End on a holding pin 27 which on the contact bridge 12th opposite side of the arm 22 is located held, as can be seen in FIG. 2.
- Fig. 1 the switch 1 is closed in the unactuated state see.
- the bearing 23 is now on the actuator 4 arranged that this in the unactuated state the first Lever arm 18 of the contact bridge 12 is opposite.
- the Actuating cam 24 also has such a distance from the bearing 23 that this in the unactuated state on second lever arm 19 of the contact bridge 12 abuts. Because of the force of the compression spring 25 thereby makes the contact bridge 12 held in a position in which the on the first lever arm 18 located switching contact 17 is removed from the fixed contact 14, so that the electrical connection between the terminals 15 and 16 is interrupted. The switch 1 is thus in the off position.
- the actuator 4 by means of the pusher 6 against the force of the compression spring 5 in To move towards the inside of the housing 2. It glides the actuating cam 24 along the contact bridge 12 from second lever arm 19 to the intermediate area 20. As best in Fig. 3 can be seen, is at the intermediate region 20, which in the is essentially flat, a slightly protruding nose 28 arranged, which are stamped into the intermediate region 20 can. As soon as the actuating cam 24 reaches the nose 28, must move a further movement of the actuator 4 additional force applied in the direction of the compression spring 25 so that the arm 22 is deflected according to the nose 28 can be.
- the arm 22 can be made of plastic and with the one-piece actuating cam 24 as an injection molded part be made. But it is also possible to arm 22 as To manufacture stamped part from metal, then for electrical Isolation of the actuating cams 24 made of plastic on the Metal part is molded. To exercise the restoring force a compression spring 25 is arranged on the arm 22. Alternatively, you can this restoring force also through elastic deformation of the arm 22 generated when the actuator 4 moves become. In this case, it makes sense to use the arm 22 as Form leaf spring, wire bracket or the like.
- the depository 23 consists of an elongated hole 29 which is arranged in the arm 22 and a pin 30 engaging in the elongated hole 29, which in turn is located on the actuator 4.
- the cone 30 can also be reversed Arm 22 and the slot 29 in the manner of a blind hole in Actuator 4 are.
- the slot 29 is cross-sectionally larger than the pin 30, for example, by the elongated hole 29 having an oval cross section has, while the pin 30 has a round cross section having. Because of the elongated hole 29, the arm 22 in addition to the pivoting movement when actuated by the Push 6 perform a movement in the direction of Direction of movement of the actuator 4 runs.
- the contact force increases according to the Curve section 33 linear until the end of the actuation path on. Conversely when switching from the on to the off position the contact force is overcome when the Pressure point suddenly reduced to zero, like can be seen from the curve section 32.
- the distance between the two curve sections 32, 32 'further shows that through the slot 29 a certain hysteresis between the Switching operations when switching the switch on and off 1 is achievable. Due to the sudden assembly and disassembly of the Contact force is advantageously a creeping one Operation with slow system between switch contact 17 and Fixed contact 14 excluded and the otherwise negative Effects such as contact erosion or the like are thereby effectively prevented.
- FIG. 6 is a bipolar switch 1 shown, the two identical Contact systems 3, 3 'of the type shown in Fig. 1, the are switchable by means of an actuator 4.
- the two contact systems 3, 3 ' each with a contact bridge 12, 12 'are arranged side by side in the housing 2, such as 6 can be seen.
- Each arm 22, 22 ' is in turn in a bearing 23, 23 'according to the type shown in Fig. 1 rotatable on Actuator 4 mounted, the two bearings 23, 23 'on the opposite sides of the Actuator 4 are located.
- the two arms 22, 22 ' are on the side facing away from the bearing 23, 23 'with a Cross strut 34 connected so that the arms 22, 22 'and Cross strut 34 form a kind of U-shaped fork 35, such as in particular from the perspective in FIG. 7 is.
- the compression spring 25 acts to exert the restoring force on the cross strut 34. How this switch works 1 is analogous to that already explained above Mode of action, in particular, here again Slot arrangement at the bearing point 23, 23 'for Contact force increase can be provided.
- This further embodiment is advantageously only a compression spring 25 and only another, as fork 35 trained part for switching action on the Contact bridges 12, 12 'necessary. This will make the Manufacturing and assembly costs for a two-pole switch reduced. It is also advantageous if the fork 35 or Cross strut 34 has a certain transverse elasticity, whereby compensation of tolerances in the contact systems 3, 3 ' can take place. Larger ones can then be used cost-effectively Tolerances in manufacturing and assembly are accepted become.
Description
- Fig. 1
- einen Längsschnitt durch einen elektrischen Schalter, wobei sich der Schalter im unbetätigten Zustand befindet,
- Fig. 2
- einen teilweisen Längsschnitt ähnlich wie in Fig. 1, wobei sich der Schalter jedoch im betätigten Zustand befindet,
- Fig. 3
- eine Kontaktbrücke des Kontaktsystems in Seitenansicht,
- Fig. 4
- die Kontaktbrücke in Draufsicht,
- Fig. 5
- ein Diagramm zur Kontaktkraft für den elektrischen Schalter,
- Fig. 6
- einen Querschnitt entlang der Linie 6-6 in Fig. 1 für einen zweipoligen Schalter und
- Fig. 7
- das Betätigungsorgan des zweipoligen Schalters aus Fig. 6 in perspektivischer Ansicht.
- 1
- elektrischer Schalter
- 2
- Gehäuse
- 3, 3'
- Kontaktsystem
- 4
- Betätigungsorgan
- 5
- Druckfeder
- 6
- Drücker
- 7
- Deckel
- 8
- Ansatz
- 9
- Nut
- 10
- Balg
- 11
- Boden (des Gehäuses)
- 12, 12'
- Kontaktbrücke
- 13
- Schneide
- 14
- Festkontakt
- 15, 16
- elektrischer Anschluß
- 17
- Schaltkontakt
- 18
- erster Hebelarm (der Kontaktbrücke)
- 19
- zweiter Hebelarm (der Kontaktbrücke)
- 20
- Zwischenbereich (an der Kontaktbrücke)
- 21
- Ausbuchtung (an der Kontaktbrücke)
- 22, 22'
- Arm
- 23, 23'
- Lagerstelle
- 24, 24'
- Betätigungsnocken
- 25
- Druckfeder (für Betätigungsnocken)
- 26
- Aufnahme
- 27
- Haltezapfen
- 28
- Nase (an der Kontaktbrücke)
- 29
- Langloch
- 30
- Zapfen (für Lagerstelle)
- 31, 32, 32', 33
- Kurvenabschnitt (für Kontaktkraft)
- 34
- Querstrebe
- 35
- Gabel
Claims (7)
- Elektrischer Schalter mit einem in einem Gehäuse (2) vorzugsweise gegen eine Druckfeder (5) betätigbaren Betätigungsorgan (4) zur Umschaltung wenigstens eines Kontaktsystems (3), das aus einer wippenförmigen, an einer als Kontaktlager wirkenden Schneide (13) drehbar gelagerten Kontaktbrücke (12) und wenigstens einem mit der Kontaktbrücke (12) zusammenwirkenden Festkontakt (14) besteht, wobei mittels eines unter Einwirkung einer Rückstellkraft in Richtung auf die Kontaktbrücke (12) beweglich am Betätigungsorgan (4) angeordneten Betätigungsnockens (24) die Umschaltung des Kontaktsystems (3) bei Betätigung des Betätigungsorgans (4) bewirkt wird, dadurch gekennzeichnet, daß am Betätigungsorgan (4) ein Arm (22) um eine Lagerstelle (23) verschwenkbar gelagert ist, daß die zur Kontaktbrücke (12) gerichtete Rückstellkraft auf den Arm (22) einwirkt und daß der Betätigungsnocken (24) an der der Kontaktbrücke (12) zugewandten Seite des Armes (22) mit einem Abstand zur Lagerstelle (23) angeordnet ist.
- Elektrischer Schalter nach Anspruch 1, dadurch gekennzeichnet, daß die wippenförmige Kontaktbrücke (12) einen ersten Hebelarm (18), der mit einem Schaltkontakt (17) versehen ist, und einen zweiten Hebelarm (19) sowie einen die beiden Hebelarme (18, 19) verbindenden Zwischenbereich (20) besitzt, wobei insbesondere seitlich an diesem Zwischenbereich (20) als Kontaktlager an der Schneide (13) dienende Ausbuchtungen (21) angeordnet sind, daß der Betätigungsnocken (24) in unbetätigtem Zustand des Betätigungsorgans (4) am zweiten Hebelarm (19) und in betätigtem Zustand des Betätigungsorgans (4) am ersten Hebelarm (18) anliegt und daß vorzugsweise am im wesentlichen ebenen Zwischenbereich (20) eine hervorstehende, insbesondere in den Zwischenbereich (20) eingeprägte Nase (28) angeordnet ist, mit der der Betätigungsnocken (24) bei Betätigung des Betätigungsorgans (4) zum Umschalten der Kontaktbrücke (12) in der Art eines Druckpunkts zusammenwirkt.
- Elektrischer Schalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Arm (22) als Hebel, insbesondere einarmiger Hebel mit seinem Drehpunkt an der Lagerstelle (23) ausgebildet ist, wobei der Betätigungsnocken (24) vorzugsweise als einstückiger Ansatz am Arm (22) angeordnet ist, und wobei weiter vorzugsweise die Lagerstelle (23) derart am Betätigungsorgan (4) angeordnet ist, daß in unbetätigtem Zustand die Lagerstelle (23) dem ersten Hebelarm (18) der Kontaktbrücke (12) gegenüberliegt und der Betätigungsnocken (24) einen derartigen Abstand von der Lagerstelle (23) besitzt, daß dieser in unbetätigten Zustand am zweiten Hebelarm (19) der Kontaktbrücke (12) anliegt.
- Elektrischer Schalter nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Lagerstelle (23) aus einem Langloch (29), das insbesondere im Arm (22) angeordnet ist, und einem in das Langloch (29) eingreifenden Zapfen (30), der insbesondere am Betätigungsorgan (4) angeordnet ist, besteht, wobei das Langloch (29) querschnittlich größer als der Zapfen (30) ausgebildet ist, so daß der Arm (22) zusätzlich zur Verschwenkbewegung eine Bewegung in Richtung des Betätigungsorgans (4) durchführen kann, wodurch eine weitere Kontaktkrafterhöhung mit schlagartigem Kontaktkraftaufbau beim Umschalten der Kontaktbrücke (12) bewirkt wird.
- Elektrischer Schalter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Arm (22) aus Kunststoff als Spritzgießteil, aus Metall als Stanzteil mit einem aus Kunststoff angespritzten Betätigungsnocken (24) o. dgl. ausgebildet ist und daß die Rückstellkraft vorzugsweise von einer auf den Arm (22) einwirkenden Druckfeder (25) ausgeübt wird, wobei die Druckfeder (25) weiter vorzugsweise mit einem Ende in einer Aufnahme (26) am Betätigungsorgan (4) und mit dem anderen Ende an einem Haltezapfen (27), der an der der Kontaktbrücke (12) gegenüberliegenden Seite des Arms (22) befindlich ist, gehalten ist.
- Elektrischer Schalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Rückstellkraft durch elastische Verformung des Armes (22) bei Bewegung des Betätigungsorgans (4) erzeugt wird, indem der Arm (22) insbesondere als Blattfeder, Drahtbügel o. dgl. ausgebildet ist.
- Elektrischer Schalter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß zwei mittels des Betätigungsorgans (4) umschaltbare Kontaktsysteme (3, 3') im Gehäuse (2) angeordnet sind, daß zwei Arme (22, 22') an der der Lagerstelle (23, 23') abgewandten Seite mit einer Querstrebe (34) in der Art einer insbesondere U-förmigen Gabel (35) verbunden sind, die gegebenenfalls eine Querelastizität zum Ausgleich von Toleranzen bei den Kontaktbrücken (12, 12') der Kontaktsysteme (3, 3') besitzen kann, wobei die auf die Arme (22, 22') ausgeübte Rückstellkraft vorzugsweise durch eine auf die Querstrebe (34) einwirkende Druckfeder (25) ausgeübt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4437020A DE4437020A1 (de) | 1994-10-17 | 1994-10-17 | Elektrischer Schalter |
DE4437020 | 1994-10-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0708464A2 EP0708464A2 (de) | 1996-04-24 |
EP0708464A3 EP0708464A3 (de) | 1996-05-08 |
EP0708464B1 true EP0708464B1 (de) | 1999-01-27 |
Family
ID=6530953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95115666A Expired - Lifetime EP0708464B1 (de) | 1994-10-17 | 1995-10-05 | Elektrischer Schalter |
Country Status (4)
Country | Link |
---|---|
US (1) | US5651452A (de) |
EP (1) | EP0708464B1 (de) |
DE (2) | DE4437020A1 (de) |
ES (1) | ES2129723T3 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4439008C2 (de) * | 1994-11-02 | 1999-05-27 | Eaton Controls Gmbh | Elektrischer Tastschalter |
JP3820680B2 (ja) * | 1997-06-11 | 2006-09-13 | 松下電器産業株式会社 | プッシュスイッチ及びその組立て方法 |
DE10250262A1 (de) * | 2001-11-02 | 2003-05-15 | Marquardt Gmbh | Elektrischer Schalter |
US6710277B1 (en) * | 2002-12-17 | 2004-03-23 | Defond Manufacturing Limited | Electrical switch |
DE102006000975B4 (de) | 2005-01-12 | 2019-09-26 | Marquardt Gmbh | Elektrischer Schalter und Elektrowerkzeug damit |
DE102008042799A1 (de) | 2008-10-13 | 2010-04-15 | Robert Bosch Gmbh | Schalteranordnung, elektrischer Verbraucher sowie Werkzeugmaschine |
DE102014015410A1 (de) | 2013-10-22 | 2015-04-23 | Marquardt Verwaltungs-Gmbh | Elektrischer Schalter, insbesondere Elektrowerkzeugschalter |
CN109994330A (zh) * | 2019-03-04 | 2019-07-09 | 常州云杰电器有限公司 | 具有快速分断的电动工具开关 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2162852C3 (de) * | 1971-10-26 | 1974-11-07 | Mecanismos Auxiliares Industriales, S.A., Valls, Tarragona (Spanien) | Umschalter |
DE2412812C2 (de) * | 1974-03-16 | 1985-10-24 | J. & J. Marquardt, 7201 Rietheim-Weilheim | Elektrischer Schalter |
US4006333A (en) * | 1975-06-11 | 1977-02-01 | Cutler-Hammer, Inc. | Higher rated double-pole trigger switch |
US4459448A (en) * | 1982-11-04 | 1984-07-10 | Mcdill Glenn A | Double pull double throw switch |
SU1422254A1 (ru) * | 1987-03-10 | 1988-09-07 | Специальное Конструкторское Бюро Харьковского Электроаппаратного Завода | Выключатель |
DE3713775C2 (de) * | 1987-04-24 | 1996-02-08 | Cherry Mikroschalter Gmbh | Tastenschalter |
DE3714632A1 (de) * | 1987-05-02 | 1988-11-17 | Asea Brown Boveri | Elektrisches schaltgeraet |
DE4011875A1 (de) * | 1990-04-12 | 1991-10-17 | Marquardt Gmbh | Elektrischer schalter |
DE4216454A1 (de) * | 1991-05-27 | 1992-12-03 | Marquardt Gmbh | Druckschalter |
DE4302185C1 (de) * | 1993-01-27 | 1994-03-24 | Schadow Rudolf Gmbh | Zweipoliger Schalter |
DE4404482A1 (de) * | 1994-02-12 | 1995-08-17 | Berker Geb | Schaltsystem für Drucktastenschalter, Schiebeschalter und Wippenschalter |
-
1994
- 1994-10-17 DE DE4437020A patent/DE4437020A1/de not_active Withdrawn
-
1995
- 1995-10-05 EP EP95115666A patent/EP0708464B1/de not_active Expired - Lifetime
- 1995-10-05 DE DE59504968T patent/DE59504968D1/de not_active Expired - Lifetime
- 1995-10-05 ES ES95115666T patent/ES2129723T3/es not_active Expired - Lifetime
- 1995-10-17 US US08/543,938 patent/US5651452A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5651452A (en) | 1997-07-29 |
EP0708464A2 (de) | 1996-04-24 |
DE4437020A1 (de) | 1996-04-18 |
DE59504968D1 (de) | 1999-03-11 |
ES2129723T3 (es) | 1999-06-16 |
EP0708464A3 (de) | 1996-05-08 |
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