EP0625283B1 - Switching pad or plate - Google Patents
Switching pad or plate Download PDFInfo
- Publication number
- EP0625283B1 EP0625283B1 EP94901895A EP94901895A EP0625283B1 EP 0625283 B1 EP0625283 B1 EP 0625283B1 EP 94901895 A EP94901895 A EP 94901895A EP 94901895 A EP94901895 A EP 94901895A EP 0625283 B1 EP0625283 B1 EP 0625283B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- contact strip
- pins
- flat
- plate
- 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
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Classifications
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- 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
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
- H01H3/141—Cushion or mat switches
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/40—Safety devices, e.g. detection of obstructions or end positions
- E05F15/42—Detection using safety edges
- E05F15/44—Detection using safety edges responsive to changes in electrical conductivity
- E05F2015/447—Detection using safety edges responsive to changes in electrical conductivity using switches in serial arrangement
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
- H01H3/141—Cushion or mat switches
- H01H2003/146—Cushion or mat switches being normally closed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H2009/0083—Details of switching devices, not covered by groups H01H1/00 - H01H7/00 using redundant components, e.g. two pressure tubes for pressure switch
Definitions
- the invention relates to a switch mat or plate according to the preamble of claim 1.
- Switch mats are known, for example, from DE 38 21 305 A1, in which two switch strips are installed in a switch mat made of a rubber-elastic material, each of which consists of a plurality of contact plates, which abut one another with their end edges and are held together by expander cords passed through them.
- a contact track runs in these contact plates, and the configuration is such that each of the contact plates has at its ends contact points which come into contact with the contact points of the adjacent plate-shaped element. When the switch mat is touched and the plate-shaped elements move apart, the contact points are separated, so that the circuit is interrupted.
- Switch mats of this type can generally not be designed with sufficient sensitivity to effect a switching process even at low pressures.
- a switching mat of the type according to the preamble of claim 1 is known from GB 1 394 064, in which leaf springs are provided either on one or on both sides of an insulating base plate, which form the current-carrying contact path.
- the leaf springs are provided with holes at certain points, through which steel contact pins engage with a wide head, which presses from the outside against the leaf springs pressed against the head under their own elasticity. When the leaf springs are pressed, the head of the contact pin is free, so that the current path is interrupted.
- the invention is therefore based on the object of designing a switch mat or plate of the type mentioned at the outset in such a way that sensitive actuation is possible, and that the entire surface of the switch mat or plate is divided into small areas can be subdivided, where a touch already leads to an interruption of contact.
- a safety mat or plate constructed in this way has two redundant safety systems and can therefore be used in particular where there are increased demands on safety.
- the configuration can expediently be such that the contact path assigned to one of the plates or mats and the contact heads interacting with it run at a distance from the contact path assigned to the other plate or mat.
- the contact path of one of the plates or mats expediently runs in the middle between the parallel branches of the meandering contact path of the other plate or mat.
- a circuit board is shown schematically, which consists of two substantially parallel flat bodies in the form of plates (1) and (2), of which the upper one has a certain elasticity, and compared to the lower plate (2) and an intermediate guide plate (3) is elastically supported by the fact that foam strips (4), which can also be part of a punched-out foam mat, for a certain small distance (a) between the upper plate (1) and the Ensure the guide plate (3) when the upper plate (1) is not touched and is in the idle state. In the position shown in Fig. 2, a certain force is exerted on the center of the plate (1). It has therefore bent a little in the middle.
- the plates (1, 2 and 3) are made of insulating material.
- Fixed to the upper plate (1) are the ends of contact pins (5) which, in the exemplary embodiment, merge from their respective fastening ends in the plate (1) into a part of larger diameter, which in turn is guided in the guide plate (3) so as to be longitudinally displaceable is.
- the contact pins (5) have at their end facing away from the fastening end a disk-shaped contact head (6) which, like the contact pins (5), consists of an electrically conductive material. It would also be possible to manufacture the contact pins (5) themselves from non-conductive material and to place contact heads made of conductive material thereon. However, the one-piece production of the contact pins (5) from an electrically conductive material, for example from aluminum, is simpler.
- the contact heads are, as shown in FIGS. 2 and 3, in each case in the dimensions of the contact heads (6) adapted circular recesses (7) are provided, which are provided in the lowermost plate (2), and which have a depth that each corresponds to the maximum switching path of the contact pins (5), which is given by the distance (a) between the upper plate (1) and the guide plate (3) which is present in the idle state.
- the contact pins (5) and the depressions (7) are each arranged in parallel rows and at the same distance from one another, so that the contact pins (5) are arranged in a grid pattern over the entire surface of the upper, Distribute the plate (1) used for actuation.
- the contact path (8) runs in a meandering manner through the areas of the contact heads (6), and it has the connection points (9) and (10), at each of which a power supply can be applied to the side of the circuit board.
- the contact path (8) which can for example be firmly connected to the guide plate (3), extends laterally into the area of the depressions (7) so that it extends below the contact heads (6) is enough.
- the top plate (1) is not actuated, all switching pins (5) with their contact heads (6) are in series; the circuit connected at positions (9) and (10) is closed.
- the upper plate (1) is bent by a force acting on it, then at least one switch head (6) is pressed so far into its recess (7) that the contact track (8 ) is interrupted. This also breaks the circuit.
- each of the switching pins (5) represents a disconnector. Its actuation leads to the interruption of the circuit, which can be used for monitoring.
- FIGS. 4 to 6 show a modification of the circuit board of FIGS. 1 to 3 insofar as here two plates (11 and 12) are now each fixed to the ends of the switching pins (5) and (5 ') and rotated by 180 ° to one another by interposing the foam strips (4) so that the switching space (a) is formed between them.
- the plate (11) and its switching pins (5) are assigned the lower plate (21) with their depressions (7), the lower plate (12) and their switching pins (5 ') the upper cover plate (22) with the depressions ( 7 ').
- the plates (11 and 12) each take on the function of a guide plate for the switch pins (5 and 5 ').
- the plate (12) therefore serves as a guide plate for the switching pins (5) which are fixedly connected to the plate (11) and vice versa, the plate (11) serves as a guide plate for the switching pins (5 ') which are fixed to the plate (12) are connected.
- 5 shows, therefore, when a force is exerted on the upper cover plate (22) and the plate (11) is deformed as a result, the switching pins (5) of this plate (11) are inserted into the depressions (7) in the lower cover plate (21) pressed, but at the same time also the switching pins (5 ') of the lower plate (12) into the recesses (7') of the upper cover plate (22).
- FIG. 7 shows a way in which the position of the isolating switches formed by the contact pins (5) can be displayed with relatively simple means, each of which has caused the circuit to be interrupted.
- sensors (15) are attached to the base of the recesses (7) of the cover plate (21), which are pressed into the associated recess (7) when the switching head of the switching pin (5) pressed down by the switching path allow to issue a signal with which the location of the respectively triggered disconnector can be localized.
- the sensors (15) can e.g. formed as piezoelectric elements and connected to a display panel via contact paths, not shown.
- Such an embodiment also allows e.g. to display the position of an operator relative to a robot monitored by the circuit board of the invention, for example in order to switch off robot movements in good time if the operator comes too close to the danger zone.
Landscapes
- Push-Button Switches (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Laminated Bodies (AREA)
- Multi-Conductor Connections (AREA)
- Thermistors And Varistors (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
Die Erfindung betrifft eine Schaltmatte oder -platte nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a switch mat or plate according to the preamble of
Schaltmatten sind beispielsweise aus der DE 38 21 305 A1 bekannt, bei der in eine Schaltmatte aus einem gummielastischen Werkstoff zwei Schaltleisten eingebaut sind, von denen jede aus einer Mehrzahl von Kontaktplatten besteht, die mit ihren Endkanten aneinanderliegen und durch durch sie hindurchgeführte Expanderschnüre zusammengehalten werden. In diesen Kontaktplatten verläuft eine Kontaktbahn, und die Ausgestaltung ist dabei so getroffen, daß jede der Kontaktplatten an ihren Enden Kontaktstellen besitzt, die mit den Kontaktstellen des benachbarten plattenförmigen Elementes in Verbindung kommen. Bei einer Berührung der Schaltmatte und bei einer dadurch bewirkten Auseinanderbewegung der plattenförmigen Elemente, werden die Kontaktstellen getrennt, so daß hierdurch der Stromkreis unterbrochen wird.Switch mats are known, for example, from DE 38 21 305 A1, in which two switch strips are installed in a switch mat made of a rubber-elastic material, each of which consists of a plurality of contact plates, which abut one another with their end edges and are held together by expander cords passed through them. A contact track runs in these contact plates, and the configuration is such that each of the contact plates has at its ends contact points which come into contact with the contact points of the adjacent plate-shaped element. When the switch mat is touched and the plate-shaped elements move apart, the contact points are separated, so that the circuit is interrupted.
Schaltmatten dieser Art lassen sich in der Regel nicht feinfühlig genug ausbilden, um einen Schaltvorgang auch bei geringen Drücken zu bewirken.Switch mats of this type can generally not be designed with sufficient sensitivity to effect a switching process even at low pressures.
Eine Schaltmatte der Gattung nach dem Oberbegriff des Patentanspruches 1 ist aus der GB 1 394 064 bekannt, bei der Blattfedern entweder auf einer oder auf beiden Seiten einer isolierenden Basisplatte vorgesehen sind, welche die stromdurchflossene Kontaktbahn bilden. Die Blattfedern sind mit Bohrungen an bestimmten Stellen versehen, durch welche aus Stahl bestehende Kontaktstifte mit einem breiten Kopf greifen, der sich jeweils von außen an die unter ihrer Eigenelastizität gegen den Kopf gedrückten Blattfedern preßt. Bei Druck auf die Blattfedern wird daher der Kopf des Kontaktstiftes frei, so daß die Strombahn unterbrochen ist. Dies gilt sowohl für die in der geannten GB 1 394 064 gezeigte Ausführungsform mit einen fest an der Basisplatte angeordneten Kontaktstift als auch für eine ebenfalls dort gezeigte Variante, bei der der Kontaktstift mit zwei jeweils an seinem Ende vorgesehenen Kontaktköpfen zwischen zwei beidseits der Basisplatte angeordneten Blattfedern gehalten ist. Bei solchen Bauarten kann die Auslösung eines Schaltvorganges dann gefährdet sein, wenn der Druck auf die Einrichtung unmittelbar im Bereich des Schaltkopfes eines Kontaktstiftes ausgeübt wird, da der Kontaktstift dort auch bei betätigten Blattfedern eben noch mit einem gewissen Bereich seines Umfanges an der Bohrung in den Blattfedern anliegen kann. Ein sicherer Schaltvorgang ist daher nur durch den Einsatz entsprechender Überwachungseinrichtungen für den fließenden Strom möglich. Eine feinfühlige Betätigung ist mit solchen Bauarten nicht möglich.A switching mat of the type according to the preamble of
Der Erfindung liegt daher die Aufgabe zugrunde, eine Schaltmatte oder -platte der eingangs genannten Art so auszubilden, daß eine feinfühlige Betätigung möglich ist, und daß auch die gesamte Fläche der Schaltmatte oder -platte in kleine Bereiche unterteilbar ist, an denen eine Berührung schon zu einer Kontaktunterbrechung führt.The invention is therefore based on the object of designing a switch mat or plate of the type mentioned at the outset in such a way that sensitive actuation is possible, and that the entire surface of the switch mat or plate is divided into small areas can be subdivided, where a touch already leads to an interruption of contact.
Zur Lösung dieser Aufgabe werden bei einer Schaltmatte oder -platte der eingangs genannten Art die kennzeichnenden Merkmale des Patentanspruches 1 vorgesehen.To achieve this object, the characterizing features of
Durch diese Ausgestaltungen wird es jeweils möglich, die gesamte Fläche der Schaltmatte oder -platte mit Kontaktelementen zu versehen, deren Abstand nur durch die Größe der Kontaktköpfe und den zwischen benachbart verlaufenden Ästen der Kontaktbahn notwendigen Isolierabstand bestimmt ist. Diese Ausgestaltung läßt daher eine sehr feine Unterteilung der Fläche einer Schaltplatte oder -matte mit Kontaktelementen zu, die wegen ihrer geringen Größe und der direkten Verbindung der Schaltstifte mit einem der Flächenkörper auch eine feinfühlige Betätigung ermöglichen.These configurations make it possible in each case to provide the entire surface of the switch mat or plate with contact elements, the spacing of which is determined only by the size of the contact heads and the insulating spacing necessary between adjacent branches of the contact track. This configuration therefore allows a very fine subdivision of the surface of a circuit board or mat with contact elements which, because of their small size and the direct connection of the switching pins to one of the planar bodies, also enable sensitive actuation.
In Weiterbildung der Erfindung können die Merkmale des Patentanspruch 2 vorgesehen werden, die eine kompakte und flache Bauweise ermöglichen.In a further development of the invention, the features of
Durch die Merkmale des Patentanspruch 3 werden zwei unabhängig voneinander wirkende Schaltkreise gebildet. Eine derartig aufgebaute Schaltmatte oder -platte besitzt zwei redundante Sicherheitssysteme, und läßt sich daher insbesondere dort einsetzen, wo erhöhte Anforderungen an die Sicherheit gestellt werden. Dabei kann die Ausgestaltung zweckmäßig jeweils so getroffen werden, daß die einer der Platten oder Matten zugeordnete Kontaktbahn und die mit ihr zusammenwirkenden Kontaktköpfe im Abstand zu der der anderen Platte oder Matte zugeordneten Kontaktbahn verlaufen. Zweckmäßig verläuft dabei die Kontaktbahn einer der Platten oder Matten jeweils in der Mitte zwischen den parallelen Ästen der mäanderförmigen Kontaktbahn der anderen Platte oder Matte.Due to the features of claim 3, two independent circuits are formed. A safety mat or plate constructed in this way has two redundant safety systems and can therefore be used in particular where there are increased demands on safety. The configuration can expediently be such that the contact path assigned to one of the plates or mats and the contact heads interacting with it run at a distance from the contact path assigned to the other plate or mat. The contact path of one of the plates or mats expediently runs in the middle between the parallel branches of the meandering contact path of the other plate or mat.
Andere vorteilhafte Weiterbildungen der Erfindung sind im Anspruch 4 gekennzeichnet. Dabei werden den Vertiefungen Sensoren zugeordnet, die bei Betätigung eines Schaltstiftes durch den die Kontaktbahn unterbrechenden Kontaktkopf betätigt werden. Diese Ausgestaltung nämlich erlaubt es zusätzlich auch noch, jeweils festzustellen, an welcher Stelle die Unterbrechung der Kontaktbahn erfolgt ist. Dies ist z.B. für Sicherheitseinrichtungen, mit denen auch festgestellt werden soll, wo sich eine Bedienungsperson befindet, ein entscheidender Vorteil.Other advantageous developments of the invention are characterized in
Die Erfindung ist anhand von Ausführungsbeispielen in der Zeichnung dargestellt und wird im folgenden erläutert. Es zeigen:
- Fig. 1
- die Draufsicht auf eine erste Ausführungsform einer Schaltplatte, die aus zwei aufeinanderliegenden Platten und einer dazwischen angeordneten Führungsplatte besteht,
- Fig. 2
- die Darstellung des Schnittes nach der Linie II-II der Fig. 1,
- Fig. 3
- den Schnitt durch die Schaltplatte der Fig. 1 und 2 längs der Linie III-III in Fig. 2,
- Fig. 4
- den Schnitt durch eine andere Ausführungsform einer Schaltplatte mit zwei gegeneinandergelegten und jeweils mit Schaltstiften verbundenen Schaltplatten gemäß der Erfindung längs der Schnittlinie IV-IV in Fig. 5,
- Fig. 5
- den Schnitt durch die Schaltplatte der Fig. 4 längs der Schnittlinie V-V,
- Fig. 6
- den Schnitt durch die Schaltplatte der Fig. 4 und 5 längs der Schnittlinie VI-VI in Fig. 5, und
- Fig. 7
- schließlich die Schnittdarstellung einer Schaltplatte ähnlich Fig. 5, jedoch mit zusätzlich angeordneten Sensoren.
- Fig. 1
- the top view of a first embodiment of a circuit board, which consists of two superimposed plates and a guide plate arranged between them,
- Fig. 2
- the representation of the section along the line II-II of Fig. 1,
- Fig. 3
- the section through the circuit board of FIGS. 1 and 2 along the line III-III in Fig. 2,
- Fig. 4
- 5 shows the section through another embodiment of a circuit board with two circuit boards which are placed against one another and are each connected with switching pins, according to the invention, along the section line IV-IV in FIG. 5,
- Fig. 5
- the section through the circuit board of FIG. 4 along the section line VV,
- Fig. 6
- the section through the circuit board of FIGS. 4 and 5 along the section line VI-VI in Fig. 5, and
- Fig. 7
- finally, the sectional view of a circuit board similar to FIG. 5, but with additionally arranged sensors.
In den Fig. 1 bis 3 ist schematisch eine Schaltplatte dargestellt, die aus zwei im wesentlichen parallel zueinander angeordneten Flächenkörpern in der Form von Platten (1) und (2) besteht, von denen die obere eine gewisse Elastizität aufweist, und gegenüber der unteren Platte (2) und einer dazwischen angeordneten Führungsplatte (3) elastisch dadurch gelagert ist, daß Schaumstoffstreifen (4), die auch Teil einer mit Ausstanzungen versehenen Schaumstoffmatte sein können, für einen gewissen geringen Abstand (a) zwischen der oberen Platte (1) und der Führungsplatte (3) sorgen, wenn die obere Platte (1) nicht berührt wird und im Ruhezustand ist. In der in der Fig. 2 dargestellten Lage, wird auf die Mitte der Platte (1) eine gewisse Kraft ausgeübt. Sie hat sich daher in der Mitte etwas durchgebogen.1 to 3, a circuit board is shown schematically, which consists of two substantially parallel flat bodies in the form of plates (1) and (2), of which the upper one has a certain elasticity, and compared to the lower plate (2) and an intermediate guide plate (3) is elastically supported by the fact that foam strips (4), which can also be part of a punched-out foam mat, for a certain small distance (a) between the upper plate (1) and the Ensure the guide plate (3) when the upper plate (1) is not touched and is in the idle state. In the position shown in Fig. 2, a certain force is exerted on the center of the plate (1). It has therefore bent a little in the middle.
Die Platten (1, 2 und 3) bestehen aus isolierendem Material. Fest mit der oberen Platte (1) sind die Enden von Kontaktstiften (5) verbunden, die beim Ausführungsbeispiel von ihrem in der Platte (1) jeweils steckenden Befestigungsende aus in einen Teil größeren Durchmessers übergehen, der wiederum in der Führungsplatte (3) längsverschiebbar geführt ist. Die Kontaktstifte (5) besitzen an ihrem vom Befestigungsende abgewandten Ende einen scheibenförmigen Kontaktkopf (6), der ebenso wie die Kontaktstifte (5) aus einem elektrisch leitfähigem Material besteht. Es wäre auch möglich, die Kontaktstifte (5) selbst aus nicht leitfähigem Material herzustellen, und hierauf aus leitfähigem Material bestehende Kontaktköpfe aufzusetzen. Die einteilige Herstellung der Kontaktstifte (5) aus einem elektrisch leitfähigen Material, z.B. aus Aluminium, ist jedoch einfacher.The plates (1, 2 and 3) are made of insulating material. Fixed to the upper plate (1) are the ends of contact pins (5) which, in the exemplary embodiment, merge from their respective fastening ends in the plate (1) into a part of larger diameter, which in turn is guided in the guide plate (3) so as to be longitudinally displaceable is. The contact pins (5) have at their end facing away from the fastening end a disk-shaped contact head (6) which, like the contact pins (5), consists of an electrically conductive material. It would also be possible to manufacture the contact pins (5) themselves from non-conductive material and to place contact heads made of conductive material thereon. However, the one-piece production of the contact pins (5) from an electrically conductive material, for example from aluminum, is simpler.
Die Kontaktköpfe sind, wie die Fig. 2 und 3 zeigt, jeweils in den Abmessungen der Kontaktköpfe (6) angepassten kreisförmigen Vertiefungen (7) aufgenommen, die in der untersten Platte (2) vorgesehen sind, und die eine Tiefe aufweisen, die jeweils dem maximalen Schaltweg der Kontaktstifte (5) entspricht, der durch den im Ruhezustand vorhandenen Abstand (a) zwischen der oberen Platte (1) und der Führungsplatte (3) gegeben ist.The contact heads are, as shown in FIGS. 2 and 3, in each case in the dimensions of the contact heads (6) adapted circular recesses (7) are provided, which are provided in the lowermost plate (2), and which have a depth that each corresponds to the maximum switching path of the contact pins (5), which is given by the distance (a) between the upper plate (1) and the guide plate (3) which is present in the idle state.
Die Kontaktstifte (5) und die Vertiefungen (7) sind, wie den Figuren 1 und 3 zu entnehmen ist, jeweils in parallelen Reihen und in gleichem Abstand zueinander angeordnet, so daß sich die Kontaktstifte (5) rastermäßig auf der gesamten Fläche der oberen, zur Betätigung dienenden Platte (1) verteilen.1 and 3, the contact pins (5) and the depressions (7) are each arranged in parallel rows and at the same distance from one another, so that the contact pins (5) are arranged in a grid pattern over the entire surface of the upper, Distribute the plate (1) used for actuation.
Zwischen der Führungsplatte (3) und der unteren Platte (2) verläuft eine Kontaktbahn (8), die so gelegt ist, daß sie jeweils die Achsen der Kontaktstifte (5) schneidet, und daher auch den Bereich der Kontaktköpfe (6) durchquert. Die Kontaktbahn (8) verläuft mäanderförmig durch die Bereiche der Kontaktköpfe (6), und sie besitzt die Anschlußstellen (9) und (10), an denen jeweils eine Stromversorgung seitlich an die Schaltplatte angelegt werden kann.Between the guide plate (3) and the lower plate (2) runs a contact path (8), which is laid so that it intersects the axes of the contact pins (5) and therefore also crosses the area of the contact heads (6). The contact path (8) runs in a meandering manner through the areas of the contact heads (6), and it has the connection points (9) and (10), at each of which a power supply can be applied to the side of the circuit board.
Wie die Fig. 3 und die Fig. 2 zeigt, verläuft die Kontaktbahn (8), die beispielsweise fest mit der Führungsplatte (3) verbunden sein kann, seitlich in den Bereich der Vertiefungen (7) herein, so daß sie bis unter die Kontaktköpfe (6) reicht. Bei nicht betätigter oberer Platte (1) liegen daher alle Schaltstifte (5) mit ihren Kontaktköpfen (6) in Serie; der an den Stellen (9) und (10) angeschlossene Schaltkreis ist geschlossen.As shown in FIG. 3 and FIG. 2, the contact path (8), which can for example be firmly connected to the guide plate (3), extends laterally into the area of the depressions (7) so that it extends below the contact heads (6) is enough. When the top plate (1) is not actuated, all switching pins (5) with their contact heads (6) are in series; the circuit connected at positions (9) and (10) is closed.
Wird nun, wie in Fig. 2 dargestellt, die obere Platte (1) durch eine auf sie wirkende Kraft durchgebogen, dann wird mindestens ein Schaltkopf (6) so weit in seine Vertiefung (7) hereingedrückt, daß an seiner Stelle die Kontaktbahn (8) unterbrochen ist. Damit ist auch der Schaltkreis unterbrochen.If, as shown in Fig. 2, the upper plate (1) is bent by a force acting on it, then at least one switch head (6) is pressed so far into its recess (7) that the contact track (8 ) is interrupted. This also breaks the circuit.
Die Darstellung der Fig. 2 ist so gewählt, daß nicht nur einer der Schaltköpfe (6) durch das Durchbiegen der Platte (1) die Kontaktbahn unterbricht, sondern mehrere Schaltköpfe. Die Ausgestaltung kann aber ohne weiteres auch so getroffen werden, daß bei einer größeren Abmessung der Platte (1) und einer örtlichen Verformung unter Umständen auch nur ein Schaltkopf in seine Vertiefung (7) gedrückt wird. Auch dies führt aber zu einer Unterbrechung des Schaltkreises. Jeder der Schaltstifte (5) stellt einen Trennschalter dar. Seine Betätigung führt zur Unterbrechung des Schaltkreises, der zur Überwachung eingesetzt werden kann.2 is chosen so that not only one of the switch heads (6) interrupts the contact path by bending the plate (1), but several switch heads. However, the configuration can also be made without further ado that, with a larger dimension of the plate (1) and a local deformation, under certain circumstances only one switch head is pressed into its recess (7). However, this also leads to an interruption in the circuit. Each of the switching pins (5) represents a disconnector. Its actuation leads to the interruption of the circuit, which can be used for monitoring.
Die Fig. 4 bis 6 zeigen eine Abwandlung der Schaltplatte der Fig. 1 bis 3 insofern, als hier nun zwei Platten (11 und 12) jeweils fest mit den Enden der Schaltstifte (5) bzw. (5') und um 180° zueinanderverdreht durch Zwischenfügung der Schaumstreifen (4) so aufeinandergelegt sind, daß zwischen ihnen der Schaltzwischenraum (a) gebildet wird. Der Platte (11) und ihren Schaltstiften (5) ist dabei die untere Platte (21) mit ihrem Vertiefungen (7) zugeordnet, der unteren Platte (12) und ihren Schaltstiften (5') die obere Abdeckplatte (22) mit den Vertiefungen (7'). Bei dieser Ausführungsform, die also in etwa der doppelten Ausführung der Schaltplatte der Fig. 1 bis 3 entspricht, übernehmen jeweils die Platten (11 und 12) die Funktion einer Führungsplatte für die Schaltstifte (5 und 5'). Die Platte (12) dient daher als Führungsplatte für die Schaltstifte (5), die fest mit der Platte (11) verbunden sind und umgekehrt, dient die Platte (11) als Führungsplatte für die Schaltstifte (5'), die fest mit der Platte (12) verbunden sind. Wie Fig. 5 zeigt, werden daher bei einer Ausübung einer Kraft auf die obere Abdeckplatte (22) und bei einer dadurch bewirkten Verformung der Platte (11) die Schaltstifte (5) dieser Platte (11) in die Vertiefungen (7) der unteren Abdeckplatte (21) gedrückt, gleichzeitig aber auch die Schaltstifte (5') der unteren Platte (12) in die Vertiefungen (7') der oberen Abdeckplatte (22). Da jeweils an der der Platte (21) zugewandten Seite der Platte (12) die Kontaktbahn (8), und an der der Platte (22) zugewandten Seite der Platte (11) die Kontaktbahn (8') in der gleichen Weise verläuft, wie das schon anhand der Fig. 2 und 3 erläutert wurde, wird daher bei der Ausgestaltung der Schaltplatte der Fig. 4 bis 6 sowohl der an den Anschlußstellen (9 und 10) anliegende Schaltkreis, als auch der Schaltkreis unterbrochen, der an den Stellen (13 und 14) der oberen Platte (11) angelegt ist. Die Ausführungsform der Fig. 4 bis 6 eröffnet daher in einfacher Weise die Möglichkeit einer mit zwei redundanten Sicherheitskreisen ausgerüsteten Schaltplatte.4 to 6 show a modification of the circuit board of FIGS. 1 to 3 insofar as here two plates (11 and 12) are now each fixed to the ends of the switching pins (5) and (5 ') and rotated by 180 ° to one another by interposing the foam strips (4) so that the switching space (a) is formed between them. The plate (11) and its switching pins (5) are assigned the lower plate (21) with their depressions (7), the lower plate (12) and their switching pins (5 ') the upper cover plate (22) with the depressions ( 7 '). In this embodiment, which corresponds approximately to the double design of the switch plate of FIGS. 1 to 3, the plates (11 and 12) each take on the function of a guide plate for the switch pins (5 and 5 '). The plate (12) therefore serves as a guide plate for the switching pins (5) which are fixedly connected to the plate (11) and vice versa, the plate (11) serves as a guide plate for the switching pins (5 ') which are fixed to the plate (12) are connected. 5 shows, therefore, when a force is exerted on the upper cover plate (22) and the plate (11) is deformed as a result, the switching pins (5) of this plate (11) are inserted into the depressions (7) in the lower cover plate (21) pressed, but at the same time also the switching pins (5 ') of the lower plate (12) into the recesses (7') of the upper cover plate (22). Since on the side of the plate (12) facing the plate (21) the contact path (8), and on the side of the plate (11) facing the plate (22) the contact path (8 ') runs in the same manner as that which has already been explained with reference to FIGS. 2 and 3, is therefore in the 4 to 6 both the circuit at the connection points (9 and 10) and the circuit interrupted, which is applied at the points (13 and 14) of the upper plate (11). The embodiment of FIGS. 4 to 6 therefore easily opens up the possibility of a circuit board equipped with two redundant safety circuits.
Die Fig. 7 schließlich zeigt eine Möglichkeit, wie mit verhältnismäßig einfachen Mitteln auch die Lage der durch die Kontaktstifte (5) gebildeten Trennschalter angezeigt werden kann, die jeweils die Unterbrechung des Schaltkreises bewirkt haben. Es sind zu diesem Zweck jeweils am Grund der Vertiefungen (7) der Abdeckplatte (21) Sensoren (15) angebracht, die dann, wenn der Schaltkopf des um den Schaltweg nach unten gedrückten Schaltstiftes (5) in die zugeordnete Vertiefung (7) hereingedrückt ist, ein Signal abzugeben erlauben, mit dem die Stelle des jeweils ausgelösten Trennschalters lokalisierbar ist. Die Sensoren (15) können z.B. als piezoelektrische Elemente ausgebildet und über nicht nähergezeigte Kontaktwege mit einer Anzeigetafel verbunden sein. Eine solche Ausführungsform erlaubt es auch, z.B. die Position einer Bedienungsperson relativ zu einem durch die Schaltplatte der Erfindung überwachten Roboter anzuzeigen, um beispielsweise rechtzeitig Bewegungsvorgänge des Roboters abzuschalten, wenn die Bedienungsperson dem Gefahrenbereich zu nahe kommt.Finally, FIG. 7 shows a way in which the position of the isolating switches formed by the contact pins (5) can be displayed with relatively simple means, each of which has caused the circuit to be interrupted. For this purpose, sensors (15) are attached to the base of the recesses (7) of the cover plate (21), which are pressed into the associated recess (7) when the switching head of the switching pin (5) pressed down by the switching path allow to issue a signal with which the location of the respectively triggered disconnector can be localized. The sensors (15) can e.g. formed as piezoelectric elements and connected to a display panel via contact paths, not shown. Such an embodiment also allows e.g. to display the position of an operator relative to a robot monitored by the circuit board of the invention, for example in order to switch off robot movements in good time if the operator comes too close to the danger zone.
Claims (6)
- A switching mat or plate consisting of electrically insulating flat members (1, 2) or (11, 12) disposed substantially parallel with one another and with which at least one contact strip (8, 8') through which current flows is associated, and which has serially connected isolating switches which are actuated upon pressure on one of the flat members, whereby there are associated with the isolating switches contact pins (5, 5') which are movably held in a guide which consists of one insulating flat member (3, 11, 12), the said contact pins bearing under spring force on the contact strip through a contact head (6), the contact strip traversing the area of the contact heads, the contact strip being in these areas connected only when a respective contact head is bearing on the contact strip, characterised in that the contact pins (5, 5') have their end remote from the contact head (6) rigidly connected to one of the flat members (1 or 11, 12) and in that the flat member comprising the guides for the contact pins associated with the respective contact strip is disposed between this contact strip (8, 8') and the flat member which is rigidly connected to these contact pins and in that the switching mat or plate comprises elastic elements which in elastically resilient manner space the flat member connected to the contact pins associated with a contact strip away from the associated contact strip so that the contact heads of these contact pins bear on the contact strip under spring force and in that there is on a side of the contact strip remote from the flat member comprising the guides for the contact pins a flat member which comprises depressions (7, 7') which allow movement of the contact heads of these contact pins.
- A switching mat or plate according to claim 1, characterised in that the depressions (7) are provided in the flat member (2) which is not connected to the contact pins and in that the guide for the contact pins is disposed between the two flat members (1, 2) and in that the contact strip (8) is disposed between the guide (3) and the flat member (2) which comprises the depressions (7).
- A switching mat or plate according to claim 1, characterised in that the guide for the contact pins (5, 5') is formed by one of the two flat members (11, 12) and in that the depressions (7, 7') are provided in additional flat members (21, 22) which serve as a covering and in that a contact strip (8, 8') is disposed in each case between the guide (11, 12) and these flat members (21, 22) which comprise the depressions (7, 7') so that two circuits are formed which act independently of each other.
- A switching mat or plate according to claim 2 or 3, characterised in that there are in the depressions (7) respective sensors (15) which are actuated by the contact head (6) interrupting the contact strip (8) when a switching pin (5) is actuated.
- A switching mat or plate according to claim 3, characterised in that the contact strip (8, 8') associated with one of the flat members (11, 12) and the contact heads (6) cooperating therewith extend at a distance from the contact strip associated with the other flat members.
- A switching mat or plate according to claim 5, characterised in that the contact strip (8, 8') of one ofthe flat members (12) extends in each case in the middle between parallel branches of the meandering contact strip (8) of the other flat member (11).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4240622A DE4240622C2 (en) | 1992-12-03 | 1992-12-03 | Safety mat or circuit board |
DE4240622 | 1992-12-03 | ||
PCT/EP1993/003329 WO1994012996A1 (en) | 1992-12-03 | 1993-11-26 | Switching pad or plate |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0625283A1 EP0625283A1 (en) | 1994-11-23 |
EP0625283B1 true EP0625283B1 (en) | 1996-10-30 |
Family
ID=6474265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94901895A Expired - Lifetime EP0625283B1 (en) | 1992-12-03 | 1993-11-26 | Switching pad or plate |
Country Status (8)
Country | Link |
---|---|
US (1) | US5512716A (en) |
EP (1) | EP0625283B1 (en) |
JP (1) | JPH07503575A (en) |
KR (1) | KR950700599A (en) |
AT (1) | ATE144858T1 (en) |
DE (2) | DE4240622C2 (en) |
ES (1) | ES2094041T3 (en) |
WO (1) | WO1994012996A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8493081B2 (en) | 2009-12-08 | 2013-07-23 | Magna Closures Inc. | Wide activation angle pinch sensor section and sensor hook-on attachment principle |
US9234979B2 (en) | 2009-12-08 | 2016-01-12 | Magna Closures Inc. | Wide activation angle pinch sensor section |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5695859A (en) * | 1995-04-27 | 1997-12-09 | Burgess; Lester E. | Pressure activated switching device |
DE19531550C2 (en) * | 1995-08-28 | 1998-04-16 | Mayser Gmbh & Co | Safety mat arrangement |
DE19604128C1 (en) * | 1996-02-06 | 1997-08-07 | Mayser Gmbh & Co | Circuit arrangement with two contact surfaces e.g. for switch- mat or switch-plate |
GB2331627B (en) * | 1997-11-22 | 2001-09-12 | Draftex Ind Ltd | Force-responsive detectors and systems |
DE10110643C1 (en) * | 2001-03-06 | 2002-04-25 | Andre Haake | Safety switch rail has contact between adjacent contact elements broken by deformation of switch rail by external force |
JP4545635B2 (en) * | 2005-05-06 | 2010-09-15 | 株式会社アイデル | Film switch |
US8393229B2 (en) * | 2010-02-24 | 2013-03-12 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Soft pressure sensing device |
CN104436619B (en) * | 2014-12-12 | 2016-11-23 | 泰山体育产业集团有限公司 | A kind of military pentathlon match shooting warning pad |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1891751A (en) * | 1932-04-02 | 1932-12-20 | Coyne David | Electric circuit breaker and burglar alarm |
US2945099A (en) * | 1959-02-17 | 1960-07-12 | Henry G Mayhew | Steering wheel switch mechanism for awakener alarm |
US3553404A (en) * | 1968-09-24 | 1971-01-05 | Tapeswitch Corp Of America | Normally closed pressure switch |
DE6801815U (en) * | 1968-10-11 | 1969-03-13 | Marquardt J & J | ELECTRIC BUTTON |
US3654407A (en) * | 1970-06-08 | 1972-04-04 | Sylvania Electric Prod | Compression switch |
GB1394064A (en) * | 1971-12-21 | 1975-05-14 | Nat Res Dev | Pressure responsive switch -press-to-break- |
CH657474A5 (en) * | 1982-09-13 | 1986-08-29 | Inventio Ag | SAFETY BAR. |
DE8706826U1 (en) * | 1987-05-08 | 1987-08-06 | Peisler, Thomas, 4300 Essen | Circuit arrangement |
DE3821305A1 (en) * | 1988-06-24 | 1990-02-22 | Andre Haake | Means for protecting from closing edges |
DE8809052U1 (en) * | 1988-07-14 | 1989-11-16 | Blomberg Robotertechnik Gmbh, 4730 Ahlen | Flat pressure sensor |
US4987277A (en) * | 1990-01-31 | 1991-01-22 | Tapeswitch Corporation Of America | Normally closed pressure-actuated switch |
-
1992
- 1992-12-03 DE DE4240622A patent/DE4240622C2/en not_active Expired - Fee Related
-
1993
- 1993-11-26 DE DE59304362T patent/DE59304362D1/en not_active Expired - Fee Related
- 1993-11-26 AT AT94901895T patent/ATE144858T1/en not_active IP Right Cessation
- 1993-11-26 EP EP94901895A patent/EP0625283B1/en not_active Expired - Lifetime
- 1993-11-26 US US08/284,421 patent/US5512716A/en not_active Expired - Fee Related
- 1993-11-26 JP JP6512769A patent/JPH07503575A/en active Pending
- 1993-11-26 WO PCT/EP1993/003329 patent/WO1994012996A1/en active IP Right Grant
- 1993-11-26 ES ES94901895T patent/ES2094041T3/en not_active Expired - Lifetime
-
1994
- 1994-07-26 KR KR1019940702568A patent/KR950700599A/en active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8493081B2 (en) | 2009-12-08 | 2013-07-23 | Magna Closures Inc. | Wide activation angle pinch sensor section and sensor hook-on attachment principle |
US9234979B2 (en) | 2009-12-08 | 2016-01-12 | Magna Closures Inc. | Wide activation angle pinch sensor section |
US9417099B2 (en) | 2009-12-08 | 2016-08-16 | Magna Closures Inc. | Wide activation angle pinch sensor section |
Also Published As
Publication number | Publication date |
---|---|
ES2094041T3 (en) | 1997-01-01 |
ATE144858T1 (en) | 1996-11-15 |
EP0625283A1 (en) | 1994-11-23 |
DE4240622C2 (en) | 1995-12-14 |
JPH07503575A (en) | 1995-04-13 |
WO1994012996A1 (en) | 1994-06-09 |
US5512716A (en) | 1996-04-30 |
DE4240622A1 (en) | 1994-06-09 |
KR950700599A (en) | 1995-01-16 |
DE59304362D1 (en) | 1996-12-05 |
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