EP2267740A1 - Control unit of an installation switch - Google Patents

Abstract

The control unit has a switch housing (10), in which a rocker switch (12) is pivotedly mounted and a movable contact piece (16) is loaded. The movable contact piece is formed as contact seesaw and is elastically supported on a knife edge bearing (24) arranged on a bracket (14). The bracket is partially made of elastic material. An intermediate chamber (15) is provided between a housing base (11) of the switch housing and the knife edge bearing. The bracket is also made up of spring bronze.

Description

The invention relates to a switching mechanism of an installation switch with a switch housing in which a rocker switch is pivotally mounted and a movable contact piece is applied, which also pivotally mounted in two stable end positions each contacted a fixed contact piece.

From the DE 34 45 459 A1 a contact arrangement for an electrical switching device is known, comprising at least one fixed contact piece, a corresponding thereto movable contact area and at least one plunger for actuating the movable contact area, wherein the contact areas are arranged on a leaf spring which serves as a contact spring and is mounted at both ends.

From the GB 20 05 919 a contact arrangement for an electrical switching device is known in which a leaf spring is used which has at least two movable contact pieces on both sides of a central bearing point on the same surface side of the leaf spring.

From the DE 32 31 933 A1 a contact arrangement for an electrical switching device is known in which leaf springs are used with contact pieces on both sides. Here, the actuation of the leaf springs serving plunger are mechanically coupled.

From the DE1276163B Finally, a rocker or toggle switch with a fixed pivotally mounted, is known from a switchable to another switch position and provided with at least one contact contact rocker, which is actuated by a rocker switch. Here, a spring arrangement is used in the switching rocker, which acts on the contact rocker resiliently, wherein the acting force is determined by the adjustable spring.

Based on this prior art, it is an object of the invention to provide for a rocker switch or toggle switch of the type mentioned a derailleur which allows safe and reliable operation of the contact rocker without additional spring.

• dass das bewegliche Kontaktstück als Kontaktwippe ausgebildet ist und auf einer an einem Bügel angeordneten Schneidenlagerung federnd gelagert ist,
• dass der Bügel zumindest partiell aus einem elektrisch leitenden Federwerkstoff gebildet ist und
• dass ein Zwischenraum zwischen Gehäuseboden des Schaltergehäuses und der Schneidenlagerung vorgesehen ist, welcher eine Auslenkung der Schneidenlagerung zum Gehäuseboden hin ermöglicht.

This object is achieved in connection with the preamble according to the invention by the characterizing features of claim 1. Accordingly, the invention provides

• that the movable contact piece is designed as a contact rocker and is mounted resiliently on a blade bearing arranged on a bracket,
• that the bracket is at least partially formed of an electrically conductive spring material and
• that a gap between the housing bottom of the switch housing and the knife-edge bearing is provided, which allows a deflection of the knife edge bearing towards the housing bottom.

It proves to be advantageous that the provided with the knife-edge bracket is resiliently formed by at least partially consists of a spring material or by heat treatment has sufficient suspension properties. By the resilient deflection of the bracket, the necessary contact force is generated. A separate spring is dispensable, which simplifies the construction of the installation switch and reduces costs.

Furthermore, the switching noise is reduced because the speed of the contact movement is reduced. Bouncing of the contacts is prevented or at least reduced, since the forces acting on the contacts force shock due to the resilient strap reduced and an improved damping effect can be achieved. This also has the advantage that smaller contact lenses can be used. According to a preferred embodiment of the switching mechanism according to the invention, the switching rocker is manufactured as a molded part made of plastic. It is essential here that the rocker switch is used without springs, that is, unlike in the prior art known, the molded switching cam are not provided with arranged inside their compression springs, but the pressure required for safe operation of the relevant switching device pressing force is by the springback caused by the rocker switch contact rocker causes in cooperation with the bracket.

Preferably, according to an advantageous embodiment of the invention, the movable contact piece is formed as a rocker made of electrically conductive sheet material and has a first and a second rocker arm, wherein the free end of the first rocker arm is provided at least on one side with a contact lens or a contact rivet for use in a circuit breaker.

Instead, the free end of the first rocker arm can also be provided on both sides with contact lenses when the switching mechanism is provided for a changeover switch.

In any case, this movable contact piece is characterized in that the contact lenses arranged thereon are made of a heat-resistant, conductive material that meets the requirements for adequate contact on the one hand and welding safety on the other hand. Preferably, the contact lenses are of hard metal having sufficient resistance to switching arcs.

According to a further advantageous embodiment of the switching mechanism according to the invention, the bracket, on which the movable contact piece is mounted, integrally formed from flat material, wherein the per se integral bracket has an elongated support member and an angled thereto fixing part, which fixing part is fixedly inserted in the switch housing.

The so-called fixing part is provided with contours that contribute significantly to its releasable anchoring in the switch housing. As a result, all forces acting on the fixing member, removed directly in the switch housing. Such forces result essentially from the advantageously integrally adjoining the fixing part bearing part which forms a resilient cantilever, which is supported on the angled thereto fixing part in the switch housing.

In a preferred embodiment of the invention, the storage part is angled at its free end. The angled end serves as a knife-edge bearing for the movable contact piece, which is acted upon by the switching rocker as intended and is thereby subjected to a certain bias. Already because of the long lever arm of the firmly clamped bearing part results in a resilient restoring force by the virtually rigid bending to the fixing.

In order to increase this restoring force or to increase the springback, it is provided in an advantageous development of the switching mechanism according to the invention that the cantilevered bearing part is angled at about half the length by about 10 ° to 30 °, preferably 15 ° in the direction of the rocker switch, that is, the bearing member formed as a cantilever is angled towards the cutting edge.

These and other advantageous embodiments and improvements of the invention are the subject of the dependent claims.

Reference to an embodiment of the invention shown in the accompanying drawings, the invention, advantageous embodiments and improvements of the invention and particular advantages of the invention will be explained and described in detail.

Fig. 1

das Innere eines längs aufgeschnittenen Schaltergehäuses ge- mäß der Erfindung in Seitenansicht mit einer darin angeordneten erfindungsgemäßen Schaltwippe sowie einem Bügel, der als Schneidenlagerung für ein als Kontaktwippe ausgebildetes be- wegliches Kontaktstück dient;

Fig. 2

eine Schaltwippe gemäß der Erfindung in Schrägansicht und

Fig. 3

ein Bügel gemäß der Erfindung.

Show it:

Fig. 1

the interior of a longitudinally cut switch housing according to the invention in side view with a switching rocker according to the invention arranged therein and a bracket which serves as a knife-edge bearing for a movable contact piece designed as a contact rocker;

Fig. 2

a rocker switch according to the invention in an oblique view and

Fig. 3

a bracket according to the invention.

Fig. 1 shows an oblique view of the interior of a longitudinally cut switch housing 10 according to the invention, in which inter alia, a rocker switch 12 according to the invention and a bracket 14 according to the invention, which serves as a knife edge bearing designed as a contact rocker movable contact piece 16, are arranged.

The rocker switch 12 is pivotally mounted centrally in the switch housing 10 and has an approximately rectangular cross-section. At her the movable contact piece 16 operated by her opposite (in Fig. 1 upper) side is a rectangular, frame-like part 18 is formed, which serves to receive a hand actuator not shown here.

Laterally on the rocker switch 12 pivot cams 20 are integrally formed on the longitudinal sides of the rectangular frame-like part 18, which engage in corresponding, not shown in detail recesses in the switch housing and around which the rocker switch 12 is pivotable.

At the bottom of the rectangular rocker switch 12, the rocker switch 12 is tapered towards the center in a wedge shape and merges into each triangular cam 22, which serve to actuate the formed as a contact rocker movable contact piece 16.

The trained as a contact rocker movable contact piece 16 rests on an integrally formed on the bracket 14 cutting edge 24 and has at one free end two oppositely disposed contact lenses 26, 28, which consist of an electrically conductive, preferably made of a heat-resistant material, in particular hard metal.

The designated as a contact rocker movable contact piece 16 pivots under load by the switching cam 22 and the rocker switch 12 according to their pivotal position, so that in each case a fixed contact piece 17 is contacted.

As a result of the load acting against the contact force of the movable contact piece 16 by the switching cam 22 ensures that each switching operation is fast and possible welding of the contacts 17, 26, 28 prevented each other or, if it should happen that the welded together contact pieces 17, 26, 28 are easily separated.

The bracket 14, on which the movable contact piece 16 is mounted, is integrally formed from flat material of a support member 32 and a thereto angled fixing member 30, which fixing member 30 is fixedly inserted in the switch housing 10.

Of importance is the between cutting edge bearing 24 of the bracket 14 and housing bottom 11 in the unsprung state of the bracket 14 resulting gap 15 which allows a resilient movement / deflection of the cutting edge bearing 24 to the housing bottom 11 out.

In Fig. 2 is the rocker 12 shown according to the invention in an oblique view. In this illustration, the rectangular basic structure of the rocker switch 12 with the frame-like part 18, the pivot cam 20 and the two-sided taper of the rocker 12 towards the center with the molded cam 22 is clearly visible, in which case the underside of the rocker 12 is shown.

In Fig. 3 a bracket 14 is shown in an oblique view from the side. It is made in one piece as an elongated flat part, wherein it is purely functionally divided into a fixing part 30 and an angled thereto storage part 32.

The fixing member 30 has two symmetrically arranged V-profiles 34, 36, which are each provided with indentations 38 and 40 are separated from each other by a central recess. The fixing part designed in this way is inserted into correspondingly prepared recesses in the switch housing 10 and anchored therein.

This anchoring ensures that all forces which are introduced via the actuation of the bearing part 32 in the integrally connected fixing member 30, are removed safely in the switch housing 10.

The bearing member 32 which is angled at its free end and serves as a cutting edge bearing 24 for the movable contact 16 is formed as an elongate cantilever with an angling 42 in the direction of the cutting edge bearing 24, which has the purpose of the spring back of the switching cam 22 of the Switch rocker 12 acted upon, exposed, cantilever-shaped support member 32 in addition to allow / increase.

LIST OF REFERENCE NUMBERS

10

switch housing

11

caseback

12

rocker

14

hanger

15

gap

16

movable contact piece (contact rocker)

17

Fixed contact piece

18

frame-like part

20

swing cams

22

switching cams

24

cutting storage

26

contact lens

28

contact lens

30

fixing

32

supporting part

34

V-Profile

36

profile

38

indentation

40

recess

42

angling

Claims (11)

Rear derailleur of an installation switch with a switch housing (10) in which a rocker switch (12) is pivotally mounted and a movable contact piece (16) applied, which also pivotally mounted in two stable end positions in each case a fixed contact piece (17) contacted,
characterized, • that the movable contact piece (16) is designed as a contact rocker and is mounted resiliently on a cutting bearing (24) arranged on a bracket (14), • that the bracket (14) is at least partially formed of an electrically conductive spring material and • that a gap (15) between the housing bottom (11) of the switch housing (10) and the cutting edge bearing (24) is provided which allows a deflection of the cutting edge bearing (24) to the housing bottom (11) out. Derailleur according to claim 1, characterized in that the switching rocker (12) is made as a molded part made of plastic. Rear derailleur according to one of claims 1 or 2, characterized in that the switching rocker (12) is used without a spring. Rear derailleur according to one of the preceding claims, characterized in that the movable contact piece (16) is formed as a rocker made of electrically conductive sheet material and having a first and a second rocker arm, wherein the free end of the first rocker arm on both sides with contact lenses (26, 28) is. Rear derailleur according to claim 4, characterized in that the contact lenses (26, 28) on the movable contact piece (16) made of heat-resistant conductive material. Rear derailleur according to one of the preceding claims, characterized in that the bracket (14) on which the movable contact piece (16) is mounted, integrally formed from flat material of a support member (32) and a thereto angled fixing member (30), which fixing part (30) fixed in the switch housing (10) is inserted. Derailleur according to claim 6, characterized in that the bearing part (32) forms a resilient cantilever, which is supported on the angled thereto fixing part (30) in the switch housing (10). Rear derailleur according to one of claims 6 or 7, characterized in that the bearing part (32) is angled at its free end, and that the angled end is provided as a cutting edge bearing (24) for the movable contact piece (16). Rear derailleur according to one of Claims 6 to 8, characterized in that the bearing part (32) designed as a cantilever is angled at approximately half the length by approximately 10 ° to 30 °, preferably by 15 °. Rear derailleur according to Claim 9, characterized in that the bearing part (32) designed as a cantilever arm is angled towards the cutting edge bearing (24). Rear derailleur according to one of the preceding claims, characterized in that the bracket (14) on which the movable contact piece (16) is mounted, is formed of spring bronze.

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