DE2033872C

DE2033872C - Electrical snap switch

Info

Publication number: DE2033872C
Application number: DE19702033872
Authority: DE
Inventors: Hans Michael Oberägeri; Limberger Ernst Zug; Rösch (Schweiz)
Original assignee: Landis and Gyr AG
Current assignee: Landis and Gyr AG
Priority date: 1970-05-05
Filing date: 1970-06-30
Publication date: 1973-03-08

Description

wippe mit zueinander örtlich versetzten Angriffspunktes der Druckfeder und des Stößels.seesaw with locally offset points of application of the compression spring and the plunger.

In den Fig. 1 und 2 ist eine Schaltwippe 1 eines Schnappschalters dargestellt, die aus einem äußeren Rahmen 2 besteht, dessen eines Ende in der Einspannst^lle 3 im Schaltergehäuse 4 fest eingespannt ist und dessen anderes Ende einen Kontakt 5 trägt. Eine Abstützung für eine Schraubenfeder 6 sowie die Führung für einen Stößel 7 und die Befestigung von zwei Festkontakten 8 und 9 sind vorhanden. Der außere Rahmen 2 der Schaltwippe 1 ist mit einer U-förmigen Aussparung 10 derart versehen, daß ein Übersetzungsarm 11 gebildet wird, welcher mit seinem freien Ende durch eine Arbeitsfeder 12 mit der diesem Ende gegenüberliegenden Seite der Aussparung 10 federelastisch verbunden ist.-Der Abstand des Angriffspunktes 13 des Stößels 7 von der Einspannstelle 3 ist mit »α« bezeichnet.In Figs. 1 and 2, a rocker switch 1 is one Snap switch shown, which consists of an outer frame 2, one end of which in the Einspannst ^ lle 3 is firmly clamped in the switch housing 4 and the other end of which carries a contact 5. A support for a helical spring 6 and the guide for a plunger 7 and the attachment of two fixed contacts 8 and 9 are available. The outer frame 2 of the rocker switch 1 is U-shaped Recess 10 provided so that a translation arm 11 is formed, which with his free end by a working spring 12 with the side of the recess opposite this end 10 is resiliently connected.-The distance of the point of application 13 of the plunger 7 from the clamping point 3 is denoted by "α".

Der Kippvorgang wird nachfolgend mit Hilfe der F i g. 2, 3 und 4 beschrieben. Vor Beginn der Kip- ao pung ist ein Kontaktdruck PJt vorhanden (Fig.2), indem der äußere Rahmen 2 der Schaltwippe 1 positiv, d. h. nach %oen, durchgebogen ist und die Arbeitsfeder 12 den Übersetzungsarm 11 auf der negativen Seite, d. h. auf der unteren Seite, hält. Der zwisehen dem äußeren Rahmen 2 und dem Übersetzungsarm 11 gebildete Winkel φ ist negativ und das System ist im Gleichgewicht. Wird der Stößel 7 weiter nach oben gezogen, so wird der Winkel φ zu Null und das System Übersetzungsann—Arbeitsfeder 11, 12 gerät unter zunehmender Beschleunigung in Bewegung. Sobald der Winkel φ einen so großen positiven Wert erreicht hat, daß die aus φ und der Arbeitsfederkraft resultierende Kraft P (Fig.3) gleich Pk wird, beginnt sich der Kontakt 5 in negativer Richtung, d.h. nach unten, zu bewegen, wobei der Nullwert der Kontaktkraft mit großer Geschwindigkeit durchlaufen wird. Nach erfolgter Kippung befindet sich die Schaltwippe 1 in der Stellung gemäß der Fig. 4. Dabei wird erreicht, daß sich die Antriebskraft des Stößels 7 und der Druckfeder 6 in einer bis zum Kipp-Punkt wirkenden Restkontaktkraft auswirken.The tilting process is illustrated below with the aid of FIGS. 2, 3 and 4. Before the start of the tilting, a contact pressure PJt is present (FIG. 2) in that the outer frame 2 of the rocker switch 1 is positively bent, that is to say towards% oen, and the working spring 12 has the transmission arm 11 on the negative side, ie on the lower side, holds. The angle φ formed between the outer frame 2 and the transmission arm 11 is negative and the system is in equilibrium. If the plunger 7 is pulled further upwards, the angle φ becomes zero and the system of transmission and working spring 11, 12 starts to move with increasing acceleration. As soon as the angle φ has reached such a large positive value that the force P (FIG. 3) resulting from φ and the working spring force becomes equal to Pk , the contact 5 begins to move in the negative direction, ie downwards, the zero value being the zero value the contact force is passed through at high speed. After tilting, the rocker switch 1 is in the position shown in FIG. 4. It is achieved that the driving force of the plunger 7 and the compression spring 6 have a residual contact force that acts up to the tilting point.

Für das einwandfreie Arbeiten des Schalters ist es eriorderlich, daß die Schaltwippe 1 eine symmetrische Anordnung aufweis'., indem die Abstände zwischen dem Kontakt 5 des äußeren Rahmens 2 einerseits und den beiden Festkontakten 8 und 9 andererseits etwa gleich groß sind.For the switch to work properly, it is essential that the rocker switch 1 is symmetrical Arrangement aufweis'. By the distances between the contact 5 of the outer frame 2 on the one hand and the two fixed contacts 8 and 9 on the other hand are approximately the same size.

Je nach dem gewählten Material und der geometrischen Auslegung der Schaltwippe 1 ist manchmal, notwendig, der Schaltwippe 1 die erforderlichen federelastischen Eigenschaften durch Anbringen von Versteifungen zu verleihen, wodurch aber die Symmetrie zerstört wird. Um diesen Nachteil zu beseitigen, werden die Angriffspunkte der Druckfeder 6 und des Stößels 7 zueinander örtlich versetzt, wie dies aus der F i g. 5 ersichtlich ist.Depending on the material selected and the geometric design of rocker switch 1, it is sometimes necessary, the rocker switch 1 has the necessary resilient properties by attaching stiffeners to lend, but this destroys the symmetry. In order to eliminate this disadvantage, will be the points of application of the compression spring 6 and the plunger 7 offset from one another locally, as shown in FIG F i g. 5 can be seen.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

PaientaiKnriHie · In order to eliminate these disadvantages, measures are to be taken. must be meteil) that allow tilting,

1. Electrical snap-action switch with an off before the contact force becomes zero, by giving the mechanism a resilient outer frame, a mechanism consisting of a pre-acceleration. To do this, with the help of a plunger and a counter-directional purpose, spring-loaded contacts or series-acting compression spring-driven switching tilting systems are used or the outer rocker, which is clamped and opened with one end in the switch housing frame of the switching rocker in the direction of the contact the other prepaid it. The pretensioned contact spring is provided in a snap-in end with a countercontact of a known design through a plunger over th cooperating contact is bent over a one-armed Febci, the and further has a translation arm, the contact switched only in one direction over sen free end becomes a C-shaped working spring before the contact force becomes zero. When free with the opposite end of the outer ben of the plunger, the contact returns to the original frame, which means that the position only after reaching the zero contact point that the point of application (13) of the impact force returns. In all versions with preload C ⁷ ) from the clamping point (3) of the switching tensioned springs, the pretensioning rocker [I) has a distance («) that is so careful that a changeover switch is measured because of the asymmetry that the power of the drive cannot be realized either.

on the translation arm (U) as well as on the au- The present invention is the task to-

Transfer frame (2) to contact (5), in known switches of this type the

is gen, such that ^the: nternal to eliminate from the over- wähnien disadvantages and a switch

low settlement (U) and the working spring (12), in which the force of the actuation

existing system before reaching the zero point of the shock i: ur a residual contact force in the tilting

Contact force is set in motion. Point is exploited by the driving force the

2. Electrical snap switch according to claim 25 outer frame of the rocker switch in the manner with 1, characterized in that the attack applied to a moment that the tilting in beipunkte 'it takes place directly on the outer frame (2) the Rirhtungen before this moment Zero-acting ram (7) i ^ir> d which is in the opposite direction.

acting compression spring (6) offset from one another

are ordered, where c ¹ »r point of application of the 30 snap-action switches of the type indicated above invent

Compression spring (6) between the clamping point (3) is achieved in that the point of application

and the point of application (13) of the plunger (7) is located. of the ram on the outer frame from the clamping point the rocker switch in the switch housing

Has distance which is such that the

35 Power of the drive as well as the transmission arm

The present invention relates to an electrical snap-action switch with one of the contacts being transmitted via the outer frame, in such a way that the inner, consisting of the resilient outer frame, with the aid of transmission arm and the working spring, consists of a plunger and one in the opposite direction effective system before reaching the zero point of the contact pressure spring driven rocker switch, which is set in motion with a 40 force.
The end is clamped in place in the switch housing and this solution causes the movement dts Sy on the other snap-on end to be initiated with a stems translation arm working spring and accelerated with counter-contacts, before the force on the contact is provided and further reaches a translation arm to zero . The contact is only then demonstrated, the free end of which is displaced via a C-shaped movement when the force of the working spring exceeds the working spring with the opposite end of the outer frame. In this outer framework is connected. Point in time, the system reaches translation arm — work

In known switches of this type, the beitsfeder is such a high speed related rocker switch essentially from an external frame-way of energy that a flawless moment, which carries a switch contact, and takes place from a 50 circuit. In this way, the same internal properties of the tongue as the translation arm and moving are achieved as with switches, which are operated by means of spring-loaded switches Tilting element works. The resilient connector contacts cause a pre-acceleration, with between the translation arm and the external difference that to achieve the above The frame does not require any additional resources due to a working pressure spring with the effect mentioned. manufactured, A push rod is used to drive the rocker switch.

. ßel that acts against a return spring. The disadvantage An execution example! of the invention

the known types of switches that snap switch is au hand only a significant

Type is based on the fact that the contact pressure when it is reached is a drawing containing parts of the snap-action switch

Chen of the switching point is zero, it being described in more detail depending on. It shows

Drive speed more or less long 60 Fig. I a plan view of the rocker switch of the

remains close to zero. Such a switch is very swin- snap-action switch,

susceptible to transmission, so that power interruptions before the F i g. 2 a schematic representation of the switching

Reaching the tipping point occur, in particular rocking in front of the tipping point,

at low drive speeds and currents F i g. 3 a schematic representation of the switching

less than 1 A. Small external rockers in the tipping point are sufficient,

layers on the contacts to create a sub-Fig. 4 a front view of the rocker switch in

break in front of the tipping point with very low forces and schematic representation

to cause. Fig. 5 is a schematic representation of the switching