DD245962A1

DD245962A1 - OPTICAL SWITCH

Info

Publication number: DD245962A1
Application number: DD28625586A
Authority: DD
Inventors: Hartmut Goeritz; Olaf Faude
Original assignee: Inst Prueffeld Elekt
Priority date: 1986-01-16
Filing date: 1986-01-16
Publication date: 1987-05-20

Abstract

Die Erfindung betrifft einen optischen Schalter, insbesondere einen Umschalter, welcher in Schutz- und Ueberwachungseinrichtungen mit Lichtwellenleitern auf bestimmte, durch eine Laengenaenderung ausdrueckbare, physikalische Veraenderungen ansprechend, anwendbar ist, dessen Ziel ein Umschalten des Lichtstromes, bei einer derartigen, als unzulaessig anzusehenden Veraenderung, ist. Dabei besteht die Aufgabe, einen Schalter zu schaffen, welcher auf eine Veraenderung ansprechend durch Umschalten der Lichtwege von einem ersten in einen zweiten stabilen Zustand uebergeht, welche dadurch geloest ist, dass einen beweglichen Lichtwellenleiter eine mit einem Biegeelement verbundene magnetische Huelse umschliesst, welche durch ein, von einer ersten in eine zweite Stellung mittels einer durch Zurueckdrehen einer geeigneten Einrichtung voreingestellten Federkraft um 180 aussen peripher um ein Gehaeuse sich, nach loesen einer auf eine Laengenaenderung ansprechende und einstellbaren geeigneten Arretierung, drehendes Magnetelement von einem ersten Anschlag zu einem zweiten Anschlag springend angezogen wird, wobei das Biegeelement vorzugsweise als eine Blattfeder ausgefuehrt ist.The invention relates to an optical switch, in particular a switch, which in protective and monitoring devices with optical fibers to certain, expressing a change in length expressing, physical changes is applicable, whose aim is to switch the luminous flux, in such, to be regarded as improper change, is. The object is to provide a switch which urn aufweht a change in response by switching the light paths from a first to a second stable state, which is solved by enclosing a movable optical waveguide connected to a bending element magnetic Hülse, which by a from a first to a second position by means of a preset by Rückwendck turning a suitable spring force 180 peripherally peripherally around a housing, after loesen one on a Laengenaenderung responsive and adjustable suitable locking, rotating magnetic element from a first stop to a second stop jumped attracted is, wherein the bending element is preferably executed as a leaf spring.

Description

Die Erfindung ist ein optischer Schalter, insbesondere ein optischer Umschalter.The invention is an optical switch, in particular an optical switch.

Der Schalter beste.ht aus einem Gehäuse 4, welches vorteilhafterweise zylindrisch gestaltet ist. An einer Seite sind zwei abgehende Lichtwellenleiter 8,9 und an der gegenüberliegenden Seite ein ankommender Lichtwellenleiter 1 durch das Gehäuse 4 durchgeführt. Die zwei abgehenden Lichtwellenleiter 8,9 sind durch eine, mit dem Gehäuse fest verbundene Halterung 10 in einem bestimmten Abstand fixiert, während der ankommende Lichtwellenleiter 1 an seinem inneren Ende von einer magnetischen Hülse 3 umschlossen ist, welche zwischen den beiden Anschlägen 6,7 so bewegbar ist, daß sich jeweils in einer der beiden Schalterstellungen der ankommende Lichtwellenleiter 1 stirnseitig mit einem der abgehenden Lichtwellenleiter 8, 9 gegenüberstehen. Das als Blattfeder ausgeführte Biegeelement 2 dient dem sicheren Anschlag der Hülse 3 an die Anschläge 6, 7, damit eine definierte Position der Lichtwellenleiter 1,8,9 zueinander auch bei äußeren Einflüssen, wie beispielsweise bei Erschütterungen, gewährleistet ist.The switch best.ht from a housing 4, which is advantageously designed cylindrical. On one side, two outgoing optical waveguides 8.9 and on the opposite side of an incoming optical waveguide 1 through the housing 4 are performed. The two outgoing optical waveguides 8,9 are fixed by a, fixed to the housing holder 10 at a certain distance, while the incoming optical waveguide 1 is enclosed at its inner end by a magnetic sleeve 3, which between the two stops 6,7 so is movable, that face in each case in one of the two switch positions of the incoming optical waveguide 1 with one of the outgoing optical waveguides 8, 9. The bending element 2 designed as a leaf spring serves to secure the sleeve 3 to the stops 6, 7 so that a defined position of the optical waveguides 1, 8, 9 relative to one another is ensured even in the case of external influences, such as shocks.

Die Hülse 3 wird durch ein, außerhalb des Gehäuses 4 vorgesehenes Magnetelement 5 an den Anschlag 6 angezogen. Das Magnetelement 5 ist um 180° peripher um das Gehäuse drehbar angeordnet. Dabei ist es in seiner Ausgangsstellung mit einer Federkraft beaufschlagt, welche durch geeignete mechanische, nicht weiter dargestellte Mittel, beispielsweise mittels einer Spiralfeder, erzeugt wird. Das Magnetelement 5 wird in dieser Stellung durch eine geeignete mechanische Arretierung gehalten. Wird jetzt diese, nicht weiter dargestellte Arretierung durch eine mechanische, zu erfassende Veränderung, beispielsweise durch eine Längenänderung, gelöst, bewegt sich auf Grund der Federkraft das Magnetelement 5 um 180° um das Gehäuse und verharrt in dieser zweiten Lage, wodurch die Hülse 3 in die zweite Stellung, an den Anschlag 7 angezogen wird. Diese Lage bleibt solange stabil, bis das Magnetelement 5 in seine Ausgangsstellung zurückgedreht wird, beispielsweise von Hand, wobei die Federkraft wieder eingestellt wird.The sleeve 3 is attracted by a, provided outside the housing 4 magnetic element 5 to the stop 6. The magnetic element 5 is rotatably arranged at 180 ° peripherally around the housing. It is acted upon in its initial position with a spring force, which is generated by suitable mechanical, not shown means, for example by means of a coil spring. The magnetic element 5 is held in this position by a suitable mechanical lock. If now this, not shown detent by a mechanical, to be detected change, for example, by a change in length, solved, moves due to the spring force, the magnetic element 5 180 ° around the housing and remains in this second position, whereby the sleeve 3 in the second position is attracted to the stop 7. This position remains stable until the magnetic element 5 is rotated back to its initial position, for example by hand, wherein the spring force is reset.

Claims

Invention claim:

1. Optical switch, in particular a switch, consisting of a sleeve-shaped housing in which a fixed support for two, introduced from one side in the axial direction optical waveguide, the opposite in position a variable holder for a third from the other side axially introduced optical waveguide is provided, arranged such that at least in a position of the holder, the ends of each connected to the two parts optical fiber with their end faces face each other, wherein the holder is designed as a bending element and corresponding stops for limiting the control are present and the bending element is provided with magnetic means for the purpose of magnetic deflection of the movable holder from the outside, characterized in that the optical waveguide (1) encloses a magnetic sleeve (3) connected to the bending element (2), which extends through a first in a second position by means of a preset by turning back a suitable device spring force by 180 ° outside peripherally around the housing (4), after solving a responsive to a change in length and adjustable suitable locking, rotating magnetic element (5) from a first stop (6) a second stop (7) is attracted jumping.

2. An optical switch according to item 1, characterized in that the bending element (2) one, at its two ends with the housing (4) fixedly connected leaf spring.

For this 1 page drawings

Field of application of the invention

The invention relates to an optical switch, in particular an optical switch, which is in protective and monitoring devices with optical fibers to certain, expressible by change in length, physical changes, applicable.

Characteristic of the known technical solutions

In the Federal Republic of Germany Offenlegungsschriften 3212576 and 3338051 optical switches are described which have a fixed support for two optical fibers and opposite to the fixed support a positionable changeable holder for an optical waveguide is arranged so that at least in one position of the movable holder, the ends of the each with the two parts connected optical waveguide facing each other, wherein the movable holder is formed as a bending element. The already known state of the art further shows that the bending element in the event of this being provided with appropriate means, mechanically, electrically or magnetically deflected. A disadvantage of the mechanically, as well as magnetically influenced switches that the switching path of the distance of the fixed optical waveguides is dependent and not changeable and switches back to change the applied magnetic field or the mechanical switching path of the switch. Small paths or small mechanical forces can not be detected with these switches.

Object of the invention

The aim of the invention is an optical switch, which switches to an impermissible change, a luminous flux.

Explanation of the essence of the invention

It is an object of the present invention to provide an optical switch which, responsive to small changes in length, switches a light wave from one optical fiber to another by switching to a second stable, remaining state.

According to the invention the object is achieved in that a movable optical waveguide encloses a magnetic sleeve connected to a bending element, which by a, from a first to a second position by means of a pre-adjusted by turning back a suitable device spring force by 180 ° outside peripherally around a housing, after releasing a responsive to a change in length and adjustable suitable locking, rotating magnetic element is jumped jumping from a first stop to a second stop, wherein the bending element is preferably designed as a at both ends to the housing fixedly connected leaf spring.

embodiment

The invention is explained in more detail below using an exemplary embodiment with reference to the drawings, which are to be regarded as sanitizing: FIG. 1 and FIG. 2: schematic representation of the switch.