EP3734629A1 - Switching device - Google Patents
Switching device Download PDFInfo
- Publication number
- EP3734629A1 EP3734629A1 EP19172270.1A EP19172270A EP3734629A1 EP 3734629 A1 EP3734629 A1 EP 3734629A1 EP 19172270 A EP19172270 A EP 19172270A EP 3734629 A1 EP3734629 A1 EP 3734629A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductor tracks
- snap disk
- recess
- housing
- snap
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 89
- 239000012777 electrically insulating material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Images
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
- H01H13/78—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 characterised by the contacts or the contact sites
- H01H13/807—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 characterised by the contacts or the contact sites characterised by the spatial arrangement of the contact sites, e.g. superimposed sites
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2203/00—Form of contacts
- H01H2203/036—Form of contacts to solve particular problems
- H01H2203/038—Form of contacts to solve particular problems to be bridged by a dome shaped contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2203/00—Form of contacts
- H01H2203/036—Form of contacts to solve particular problems
- H01H2203/044—Form of contacts to solve particular problems to achieve a predetermined sequence of switching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2203/00—Form of contacts
- H01H2203/056—Cuts or depressions in support, e.g. to isolate contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2205/00—Movable contacts
- H01H2205/016—Separate bridge contact
- H01H2205/024—Means to facilitate positioning
- H01H2205/028—Protuberances on substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2215/00—Tactile feedback
- H01H2215/004—Collapsible dome or bubble
- H01H2215/012—Positioning of individual dome
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2215/00—Tactile feedback
- H01H2215/004—Collapsible dome or bubble
- H01H2215/014—Avoiding permanent dome inversion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2215/00—Tactile feedback
- H01H2215/004—Collapsible dome or bubble
- H01H2215/016—Collapsing to second stable position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2215/00—Tactile feedback
- H01H2215/004—Collapsible dome or bubble
- H01H2215/018—Collapsible dome or bubble unstressed in open position of switch
Definitions
- the invention relates to a switching device as an interface for an electrically operated machine tool or other electrical device and a person for converting a mechanical feed movement into an electrical switching signal according to the preamble of claim 1.
- Such switching devices have proven themselves in the past as an interface between people and electrically operated devices or machine tools, since they reliably generate control signals when a mechanical feed movement occurs on them.
- the structural design and the functioning of such switching devices can, for example, from the EP 1 750 291 B1 can be removed.
- the switching devices consist of a housing in which a circuit board with contact or conductor tracks is present. One or more recesses are incorporated in the housing.
- a snap disk made of an electrically conductive material is inserted into the respective recess and is under tension.
- Such snap disks are in particular arched outward in the shape of a dome, so that the snap disks protrude from the plane formed by the housing surface and are consequently freely accessible from the outside and can consequently be operated mechanically.
- the outwardly protruding contours of the snap disks can be covered by means of switching mats or other actuating elements. Thus, the contour of the switch surface can be felt as well as visually recognized.
- buttons can be assigned a specific control function that can be recognized by the respective person as the user by means of appropriately designed symbols or labeling.
- a circuit board is arranged in the interior of the housing and has two switching contacts. These switching contacts usually protrude from the plane formed by the circuit board in the direction of the snap disks. As soon as the snap disk is bent in the direction of the circuit board by a mechanical feed force acting on it, the underside of the snap disk bridges the distance between the two switching contacts of the circuit board. This creates an electrical short circuit through which an electrical switching signal is generated and forwarded to a machine tool or other electrical device for control.
- the switching contacts are accordingly arranged in the region of the maximum bulge of the snap disk and run directly in alignment below the bulge of the snap disk. As soon as the manual feed force no longer acts on the snap disk, the snap disk jumps back into its starting position due to the prestressing force stored in it.
- a disadvantage of this structural design has been found that a snap disk can only generate an electrical switching signal, because the snap disk either bridges the distance between the two switching contacts and thereby generates the switching signal or the snap disk is lifted or spaced from the two switching contacts, so that this electrical contact is open.
- the invention is therefore based on the object of developing a switching device of the type mentioned at the beginning in such a way that at least two electrical control signals can be generated by means of a snap disk.
- This respective short circuit can be recognized by a control device and converted into an electrical switching signal.
- a control device When not actuated, there is electrical contact between the outer conductor tracks and the legs located in the corner areas of the snap disk, whereas when the snap disk is actuated by lifting the legs off the outer conductor tracks, this contact opens, while the contact is made by the swinging through of the snap disk closes the middle conductor tracks and thus short-circuits the two middle conductor tracks by separating them in the center.
- the circuit board consists of four spatially separated conductor tracks, which have the corresponding arrangement of switching contacts and if support bodies are arranged between the switching contacts of the first, second and third or fourth conductor tracks and between the center of the housing and the edge of the housing at right angles to the conductor tracks , on which the snap disk rests like a rocker, then either the edge areas of the snap disk stand out from the respective outer conductor tracks when pushed through and the two switching contacts provided in the center are short-circuited by the snap disk or the snap disk short-circuits the outer conductor tracks when not actuated , since these are based on the respective Conductor tracks are in contact so that each snap disk generates two different switching signals.
- the printed circuit board and its four conductor tracks are particularly advantageous to produce as a stamped grid from an electrically conductive material and then to encapsulate or sheath this stamped grid by means of an electrically insulating material, for example plastic. It is important to ensure that areas of the conductor tracks facing the snap disks installed subsequently are not covered by the insulating material, but rather are freely accessible. These freely accessible areas of the conductor tracks serve as switching contacts for the snap disks and to generate the respective short circuits.
- the stamped grid overmolded in this way can be manufactured inexpensively and precisely, because its overmoulding creates the housing and the receiving opening required to accommodate the snap-action disks, into which the respective snap-action disk is inserted and locked in position.
- a switching device 1 as an interface for an electrically operated and not shown machine tool or other electrical device and a person for converting a mechanical feed movement 2 into an electrical switching signal can be seen.
- the device 1 consists of a housing 3 and an essentially rectangular recess 4 machined into it.
- an actuating element 5 which is mounted axially movably on it is attached.
- a snap disk 9 which is made of an electrically conductive material, is arranged between the actuating element 5 and the closed lower side of the housing 3.
- the snap disk 9 has a dome-shaped bulge which is designed in the direction of the actuating element 5 and interacts with it as explained in more detail below.
- the snap disk 9 has, in the outer area, legs designed like a dome. The bulge of the snap disk 9 protrudes beyond the outer area or the legs.
- the housing 4 supports four conductor tracks 21, 22, 23 and 24.
- the two outer first and second conductor tracks 21 and 22 run both parallel to each other and parallel to the two opposite walls of the recess 4.
- the snap disk 9 rests in the corner areas 15 with its legs on the outer conductor tracks 21, 22 and thus forms with the outer two conductor tracks 21 and 22 a closed electrical contact, which is defined as the first electrical circuit.
- the conductor tracks 21, 22, 23 and 24 lie in a common plane.
- the two inner and spatially separated third and fourth conductor tracks 23 and 24 are provided, which are spaced from one another in the area of the center 6 of the recess 4.
- the two conductor tracks 23 and 24 each have a switching contact 13, which each interact with the snap disk 9 when the bulge of the snap disk 9 is moved or rotated in the direction of the center 6.
- the distance between the two switching contacts 13 is consequently bridged by the snap disk 9 and a short circuit occurs. This switching state is defined as the second switching circuit.
- Supporting bodies 25 and 26 are arranged perpendicular to the conductor tracks 21, 22, 23 and 24.
- the support bodies 25 and 26 are each designed as a web which is molded or attached to the inner wall of the recess 4.
- the support bodies 25 and 26 run perpendicular to the four conductor tracks 21, 22, 23 and 24.
- the support bodies 25 and 26 are arranged between the snap disk 9 and the conductor tracks 21, 22, 23 and 24.
- the respective movement of the snap disk 9 can be taken as a function of the manual feed forces acting on it.
- the snap disk 9 is in its starting position and a manual feed force 2 does not act on it.
- the legs of the snap disk 9 lie in the corner areas 15 of the recess 4 on the two outer first and second conductor tracks 21 and 22, so that the respective first and second conductor tracks 21 and 22 are electrically short-circuited by the snap disk 9.
- This electrical switching state can be tapped via an electrical contact, such as a soldering connection 14, in the outer area of the housing 4 at the ends of the conductor tracks 21, 22, 23, 24 led to the outside and forwarded to a control device (not shown) for switching an electrical device and be evaluated and converted there.
- the snap disk 9 As soon as a mechanical feed force acts on the snap disks 9 or the externally accessible actuating element 5, for example by a human finger, the snap disk 9 is bent in the direction of the two inner third and fourth conductor tracks 23 and 24.
- the switching state has changed compared to the initial situation Figure 3a (first circuit) changed and this change of switching state in the second circuit can be transmitted to the control device via the electrical contacting of the middle two conductor tracks 23 and 24 in their end area outside the housing 3 on a circuit board or be detected and evaluated by this.
- the two support bodies 25 and 26 accordingly form a rotating or support surface for the snap disk 9, whereby the snap disk 9 is not hindered in its movement in the direction of the two inner conductor tracks 23 and 24 and at the same time the outer edge areas of the snap disk 9 in the corner areas 15 is lifted from the outer conductor tracks 21 and 22.
- Such a movement can also be viewed as a kind of seesaw in the technical sense.
- a corresponding projection in the form of a bulge or dome can be provided on the underside of the snap disk 9 in its central area.
- the circuit board 10 consists of a stamped grid 20 made of electrically conductive material. Consequently, the four conductor tracks 21, 22, 23 and 24 are initially to be positioned in a position-oriented manner in a molding tool 19 and are then encapsulated or sheathed by means of a liquid plastic material 18.
- the molding tool 19 is designed in such a way that, on the one hand, the housing 3 with the recess 4 is created and, on the other hand, certain areas of the conductor tracks 21, 22, 23 and 24 are not covered by the electrically insulating plastic 18, i.e. are freely accessible.
- buttons 12 and 13 serve as buttons 12 and 13 for the switching device 1 according to the invention, because the snap disk 9 lies on the buttons 12 of the two outer conductor tracks 21 and 22 in the unactuated state - as above explained - on and when the snap disk 9 is moved by the manual feed force 2 in the direction of the two inner conductor tracks 23 and 24, the outer areas of the snap disk 9 lift off the buttons 12 and at the same time come into an electrically operative connection with the buttons or contacts 13 of the two inner conductor tracks 23 and 24.
- Such a bulging of the snap disk 9 is only made possible by the two existing support bodies 25 and 26, which form a type of rocker for the snap disk 9.
- the support bodies 25 and 26 can be produced at the same time.
- the support bodies 25 and 26 run between the respective buttons 12 of the two outer conductor tracks 21 and 22 and the two buttons 13 of the inner conductor tracks 23 and 24 and are spaced approximately the same distance from the respective buttons 12 and 13.
Landscapes
- Push-Button Switches (AREA)
- Eye Examination Apparatus (AREA)
- Seal Device For Vehicle (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Bei einer Vorrichtung (1) als Schnittstelle für eine elektrisch betriebene Werkzeugmaschine oder ein sonstiges elektrisches Gerät und einen Menschen zur Umwandlung einer mechanischen Zustellbewegung (2) in ein elektrisches Schaltsignal (12), bestehend aus:einem Gehäuse (3), in dem mindestens eine Aussparung (4) eingearbeitet ist, einer in dem Gehäuse (3) vorgespannt gehaltenen und im Bereich der Aussparung (4) angeordneten Schnappscheibe (9), die im unbetätigten Zustand in Richtung der Öffnung der Aussparung (4) ausgewölbt ist und einer in dem Gehäuse (3) angeordneten Leiterplatte (10), die aus elektrisch leitfähigen Leiterbahnen (21, 22, 23, 24) gebildet ist, wobei, die Schnappscheibe (9) im betätigten Zustand mit zwei Leiterbahnen (23, 24) in einen elektrischen Wirkkontakt gelangt, soll mittels einer Schnappscheibe (9)mindestens zwei elektrische Steuersignale generierbar sind.Dies ist dadurch erreicht, dass vier der vorhandenen Leiterbahnen (21, 22, 23, 24) räumlich voneinander getrennt und paarweise zusammengeschaltet sind und jedes Paar der Leiterbahnen (21, 22,) oder (23, 24) einen Schaltkreis bilden,dass senkrecht zu den vier Leiterbahnen (21, 22, 23, 24) zwei zueinander beabstandete Stutzkörper (25, 26) vorgesehen sind, die in einer Ebene angeordnet sind, die zwischen den vier Leiterbahnen (21, 22, 23, 24) und der Schnappscheibe (9) verlaufen,und dass die Schnappscheibe (9) während der Zustellbewegung von dem Stützkörper (25, 26) nach Art einer Wippe abgestützt ist, derart, dass der außenseitig zu den Stützkörpern (25, 26) verlaufende Bereich der Schnappscheibe (9) von der ersten und zweiten Leiterbahn (21, 22) abgehoben ist und gleichzeitig die Schnappscheibe (9) auf den inneren dritten und vierten Leiterbahnen (23, 24) aufliegt und mit diesen elektrisch verbunden ist.In a device (1) as an interface for an electrically operated machine tool or other electrical device and a person for converting a mechanical feed movement (2) into an electrical switching signal (12), comprising: a housing (3) in which at least one Recess (4) is incorporated, one in the housing (3) held pretensioned and arranged in the area of the recess (4) snap disk (9), which is arched in the non-actuated state in the direction of the opening of the recess (4) and one in the housing (3) arranged printed circuit board (10), which is formed from electrically conductive conductor tracks (21, 22, 23, 24), wherein the snap disk (9) in the actuated state comes into electrical contact with two conductor tracks (23, 24), should be able to generate at least two electrical control signals by means of a snap disk (9). This is achieved in that four of the existing conductor tracks (21, 22, 23, 24) are spatially spaced apart nnt and are interconnected in pairs and each pair of conductor tracks (21, 22,) or (23, 24) form a circuit that, perpendicular to the four conductor tracks (21, 22, 23, 24), two spaced-apart support bodies (25, 26) are provided, which are arranged in a plane that runs between the four conductor tracks (21, 22, 23, 24) and the snap disk (9), and that the snap disk (9) is removed from the support body (25, 26) during the feed movement is supported in the manner of a rocker, in such a way that the area of the snap disk (9) running on the outside to the support bodies (25, 26) is lifted from the first and second conductor tracks (21, 22) and at the same time the snap disk (9) is lifted from the inner third and fourth conductor tracks (23, 24) rests and is electrically connected to them.
Description
Die Erfindung bezieht sich auf eine Schalt-Vorrichtung als Schnittstelle für eine elektrisch betriebene Werkzeugmaschine oder ein sonstiges elektrisches Gerät und einem Menschen zur Umwandlung einer mechanischen Zustellbewegung in ein elektrisches Schaltsignal nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a switching device as an interface for an electrically operated machine tool or other electrical device and a person for converting a mechanical feed movement into an electrical switching signal according to the preamble of
Solche Schaltvorrichtungen haben sich in der Vergangenheit als Schnittstelle zwischen Menschen und elektrisch betriebenen Geräten bzw. Werkzeugmaschinen bewährt, da diese zuverlässig Steuersignale generieren, wenn eine mechanische Zustellbewegung auf diese erfolgt. Der konstruktive Aufbau und die Funktionsweise solcher Schaltvorrichtungen können beispielsweise aus der
Die Schnappscheibe bzw. der darüber liegende Betätigungshebel bilden demnach eine Schaltfläche. Jeder Schaltfläche kann dabei eine bestimmte Steuerfunktion zugewiesen sein, die mittels entsprechend ausgestalteter Symbolik oder Beschriftung für den jeweiligen Menschen als Benutzer erkennbar ist.The snap disk or the actuating lever located above it therefore form a button. Each button can be assigned a specific control function that can be recognized by the respective person as the user by means of appropriately designed symbols or labeling.
Im Inneren des Gehäuses ist eine Leiterplatte angeordnet, die zwei Schaltkontakte aufweist. Diese Schaltkontakte stehen üblicherweise aus der von der Leiterplatte gebildeten Ebene in Richtung der Schnappscheiben über. Sobald die Schnappscheibe durch eine entsprechend auf diese einwirkende mechanische Zustellkraft in Richtung der Leiterplatte durchgebogen ist, überbrückt die Unterseite der Schnappscheibe den Abstand zwischen den beiden Schaltkontakten der Leiterplatte. Somit entsteht ein elektrischer Kurzschluss, durch den ein elektrisches Schaltsignal generiert und zur Steuerung an eine Werkzeugmaschine oder ein sonstiges elektrisches Gerät weitergeleitet ist. Die Schaltkontakte sind demnach im Bereich der maximalen Auswölbung der Schnappscheibe angeordnet und verlaufen unmittelbar fluchtend unterhalb der Wölbung der Schnappscheibe. Sobald die manuelle Zustellkraft auf die Schnappscheibe nicht mehr einwirkt, springt die Schnappscheibe in ihre Ausgangsposition aufgrund der in ihr gespeicherten Vorspannkraft zurück.A circuit board is arranged in the interior of the housing and has two switching contacts. These switching contacts usually protrude from the plane formed by the circuit board in the direction of the snap disks. As soon as the snap disk is bent in the direction of the circuit board by a mechanical feed force acting on it, the underside of the snap disk bridges the distance between the two switching contacts of the circuit board. This creates an electrical short circuit through which an electrical switching signal is generated and forwarded to a machine tool or other electrical device for control. The switching contacts are accordingly arranged in the region of the maximum bulge of the snap disk and run directly in alignment below the bulge of the snap disk. As soon as the manual feed force no longer acts on the snap disk, the snap disk jumps back into its starting position due to the prestressing force stored in it.
Als nachteilig bei diesem konstruktiven Aufbau hat sich herausgestellt, dass eine Schnappscheibe ausschließlich ein elektrisches Schaltsignal erzeugen kann, denn die Schnappscheibe überbrückt entweder den Abstand zwischen den beiden Schaltkontakten und erzeugt dadurch das Schaltsignal oder die Schnappscheibe ist von den beiden Schaltkontakten abgehoben bzw. beabstandet, so dass dieser elektrische Kontakt geöffnet ist.A disadvantage of this structural design has been found that a snap disk can only generate an electrical switching signal, because the snap disk either bridges the distance between the two switching contacts and thereby generates the switching signal or the snap disk is lifted or spaced from the two switching contacts, so that this electrical contact is open.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Schalt-Vorrichtung der eingangs genannten Gattung derart weiterzubilden, dass mittels einer Schnappscheibe mindestens zwei elektrische Steuersignale generierbar sind.The invention is therefore based on the object of developing a switching device of the type mentioned at the beginning in such a way that at least two electrical control signals can be generated by means of a snap disk.
Diese Aufgabe ist durch die Merkmale des kennzeichnenden Teils von Patentanspruch 1 gelöst.This object is achieved by the features of the characterizing part of
Weitere vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous developments of the invention emerge from the subclaims.
Dadurch, dass vier der vorhandenen Leiterbahnen räumlich voneinander getrennt und paarweise zusammengeschaltet sind und jedes Paar der Leiterbahnen einen Schaltkreis bilden, dass senkrecht zu den vier Leiterbahnen zwei zueinander beabstandete Stutzkörper vorgesehen sind, die in einer Ebene angeordnet sind, die zwischen den vier Leiterbahnen und der Schnappscheibe verläuft, und dass die Schnappscheibe während der Zustellbewegung von dem Stützkörper nach Art einer Wippe abgestützt ist, derart, dass der außenseitig zu dem Stützkörpern verlaufende Bereich der Schnappscheibe von der ersten und zweiten Leiterbahn abgehoben ist und gleichzeitig die Schnappscheibe auf den inneren dritten und vierten Leiterbahnen aufliegt und mit diesen elektrisch verbunden ist, ist erreicht, dass die Schnappscheibe sowohl in ihrer Ausgangsposition als auch in ihrer durchgedrückten Schnappposition jeweils verschiedene Leiterbahnen berührt und kurzschließt. Dieser jeweilige Kurzschluss kann durch eine Steuereinrichtung erkannt und in ein elektrisches Schaltsignal umgewandelt werden. Unbetätigt liegt somit eine elektrische Kontaktierung der äußeren Leiterbahnen mit den jeweils in den Eckbereichen der Schnappscheibe befindlichen Beinchen vor, wohingegen bei der Betätigung der Schnappscheibe durch Abheben der Beinchen von den äußeren Leiterbahnen diese Kontaktierung sich öffnet, während sich der Kontakt durch das Durchschwingen der Schnappscheibe auf die mittleren Leiterbahnen schließt und somit die zwei mittleren Leiterbahnen über deren Trennung im Zentrum hinweg kurzschließt.Because four of the existing conductor tracks are spatially separated from one another and connected in pairs and each pair of conductor tracks form a circuit that two mutually spaced support bodies are provided perpendicular to the four conductor tracks, which are arranged in a plane that is between the four conductor tracks and the Snap disk runs, and that the snap disk is supported by the support body in the manner of a rocker during the feed movement, in such a way that the area of the snap disk running on the outside to the support body is lifted from the first and second conductor tracks and at the same time the snap disk is lifted from the inner third and fourth Conductor tracks rests on and is electrically connected to them, the result is that the snap disk touches and short-circuits different conductor tracks both in its starting position and in its pressed-through snap position. This respective short circuit can be recognized by a control device and converted into an electrical switching signal. When not actuated, there is electrical contact between the outer conductor tracks and the legs located in the corner areas of the snap disk, whereas when the snap disk is actuated by lifting the legs off the outer conductor tracks, this contact opens, while the contact is made by the swinging through of the snap disk closes the middle conductor tracks and thus short-circuits the two middle conductor tracks by separating them in the center.
Wenn nämlich die Leiterplatte aus vier räumlich voneinander getrennten Leiterbahnen besteht, die die entsprechende Anordnung von Schaltkontakten aufweisen und wenn zwischen den Schaltkontakten der ersten, zweiten und der dritten oder vierten Leiterbahnen und zwischen dem Zentrum des Gehäuses und dem Gehäuserand rechtwinklig zu den Leiterbahnen Stützkörper angeordnet sind, auf denen die Schnappscheibe nach Art einer Wippe aufliegt, dann heben sich entweder die Randbereiche der Schnappscheibe beim Durchdrücken von den jeweiligen äußeren Leiterbahnen ab und die beiden im Zentrum vorgesehenen Schaltkontakten werden durch die Schnappscheibe kurzgeschlossen oder die Schnappscheibe schließt im unbetätigten Zustand die äußeren Leiterbahnen kurz, da diese auf den jeweiligen Leiterbahnen aufliegt, so dass jede Schnappscheibe dadurch zwei unterschiedliche Schaltsignale erzeugt.Namely, if the circuit board consists of four spatially separated conductor tracks, which have the corresponding arrangement of switching contacts and if support bodies are arranged between the switching contacts of the first, second and third or fourth conductor tracks and between the center of the housing and the edge of the housing at right angles to the conductor tracks , on which the snap disk rests like a rocker, then either the edge areas of the snap disk stand out from the respective outer conductor tracks when pushed through and the two switching contacts provided in the center are short-circuited by the snap disk or the snap disk short-circuits the outer conductor tracks when not actuated , since these are based on the respective Conductor tracks are in contact so that each snap disk generates two different switching signals.
Die derart definierte Bewegung der Schnappscheibe, insbesondere deren Eckbereiche beim Herunterdrücken der Auswölbung der Schnappscheibe in Richtung der beiden mittleren Leiterbahnen führt zu zwei unterschiedlichen Schaltsituationen, denen jeweils ein unterschiedliches Schaltsignal zugeordnet werden kann.The movement of the snap disk defined in this way, in particular its corner areas when the bulge of the snap disk is pressed down in the direction of the two central conductor tracks, leads to two different switching situations, each of which can be assigned a different switching signal.
Es ist besonders vorteilhaft, die Leiterplatte und deren vier Leiterbahnen als Stanzgitter aus einem elektrisch leitfähigen Werkstoff herzustellen und dieses Stanzgitter nachfolgend mittels eines elektrisch isolierenden wirkenden Werkstoffes, beispielsweise Kunststoff, zu umspritzen oder zu ummanteln. Dabei ist darauf zu achten, dass Bereiche der Leiterbahnen, die der nachfolgend eingebauten Schnappscheiben zugewandt sind, von dem isolierenden wirkenden Werkstoff nicht abgedeckt, sondern vielmehr frei zugänglich sind. Diese frei zugänglichen Bereiche der Leiterbahnen dienen nämlich als Schaltkontakte für die Schnappscheiben und zur Erzeugung der jeweiligen Kurzschlüsse. Das derart umspritzte Stanzgitter kann kostengünstig und präzise hergestellt sein, denn durch dessen Umspritzung entsteht das Gehäuse und die zur Aufnahme der Schnappscheiben erforderliche Aufnahmeöffnung, in die die jeweilige Schnappscheibe eingesetzt und lageorientiert arretiert ist.It is particularly advantageous to produce the printed circuit board and its four conductor tracks as a stamped grid from an electrically conductive material and then to encapsulate or sheath this stamped grid by means of an electrically insulating material, for example plastic. It is important to ensure that areas of the conductor tracks facing the snap disks installed subsequently are not covered by the insulating material, but rather are freely accessible. These freely accessible areas of the conductor tracks serve as switching contacts for the snap disks and to generate the respective short circuits. The stamped grid overmolded in this way can be manufactured inexpensively and precisely, because its overmoulding creates the housing and the receiving opening required to accommodate the snap-action disks, into which the respective snap-action disk is inserted and locked in position.
In der Zeichnung ist ein erfindungsgemäßes Ausführungsbeispiel dargestellt, das nachfolgend näher erläutert ist. Im Einzelnen zeigt:
Figur 1- eine Schalt-Vorrichtung bestehend aus einem Gehäuse, in dem eine im Wesentlichen rechteckförmige Aussparung eingearbeitet ist, aus einer in der Aussparung angeordneten Schnappscheibe und aus vier räumlich voneinander beabstandeten Leiterbahnen, in perspektivischer Ansicht,
Figur 2- eine Draufsicht auf die Schalt-Vorrichtung der
mit zwei parallel und senkrecht zu den vier Leiterbahnen verlaufenden Stützkörpern, die an dem Gehäuse angeformt sind und die zwischen den Leiterbahnen und der Schnappscheibe verlaufen,Figur 1 - Figur 3a
- die Schalt-Vorrichtung gemäß
im Schnitt parallel und im Bereich der mittleren Leiterbahnen im unbetätigten Zustand und,Figur 1 - Figur 3b
- die Schalt-Vorrichtung gemäß
Figur 3a im betätigten Zustand und Figur 4- ein Herstellungsverfahren für die als Stanzgitter ausgestalteten Leiterbahnen und deren Gehäuse für eine Vorrichtung gemäß den vorgenannten Figuren.
- Figure 1
- a switching device consisting of a housing in which a substantially rectangular recess is incorporated, of a snap disk arranged in the recess and of four spatially spaced conductor tracks, in a perspective view,
- Figure 2
- a plan view of the switching device of
Figure 1 with two parallel and perpendicular to the four conductor tracks running support bodies, the are molded onto the housing and which run between the conductor tracks and the snap disk, - Figure 3a
- the switching device according to
Figure 1 in the section parallel and in the area of the middle conductor tracks when not actuated and, - Figure 3b
- the switching device according to
Figure 3a in the actuated state and - Figure 4
- a manufacturing method for the conductor tracks designed as leadframes and their housings for a device according to the aforementioned figures.
In den
Zwischen dem Betätigungselement 5 und der geschlossenen unteren Seite des Gehäuses 3 ist eine Schnappscheibe 9 angeordnet, die aus einem elektrisch leitfähigen Werkstoff hergestellt ist. Die Schnappscheibe 9 weist eine domförmige Auswölbung auf, die in Richtung des Betätigungselementes 5 ausgestaltet ist und mit diesem wie nachfolgend näher erläutert zusammenwirkt. Die Schnappscheibe 9 weist im Außenbereich domartig ausgestaltete Beinchen auf. Die Auswölbung der Schnappscheibe 9 überragt den Außenbereich bzw. die Beinchen.A
Insbesondere aus
Die Leiterbahnen 21, 22, 23 und 24 liegen in einer gemeinsamen Ebene.The conductor tracks 21, 22, 23 and 24 lie in a common plane.
Zwischen den beiden äußeren Leiterbahnen 21 und 22 sind die beiden innenliegenden und räumlich voneinander getrennten dritten und vierten Leiterbahnen 23 und 24 vorgesehen, die im Bereich des Zentrums 6 der Aussparung 4 voneinander beabstandet sind. In dem Bereich des Zentrums 6 weisen die beiden Leiterbahnen 23 und 24 jeweils einen Schaltkontakt 13 auf, die jeweils mit der Schnappscheibe 9 zusammenwirken, wenn die Auswölbung der Schnappscheibe 9 in Richtung des Zentrums 6 bewegt bzw. gedreht ist. Der Abstand zwischen den beiden Schaltkontakten 13 wird folglich durch die Schnappscheibe 9 überbrückt und es entsteht ein Kurzschluss. Dieser Schaltzustand ist als zweiter Schaltkreis definiert.Between the two
Senkrecht zu den Leiterbahnen 21, 22, 23 und 24 sind Stützkörper 25 bzw. 26 angeordnet. Die Stützkörper 25 und 26 sind dabei jeweils als Steg ausgebildet, der an der Innenwand der Aussparung 4 angeformt oder befestigt ist. Die Stützkörper 25 und 26 verlaufen senkrecht zu den vier Leiterbahnen 21, 22, 23 und 24. Zudem sind die Stützkörper 25 und 26 zwischen der Schnappscheibe 9 und den Leiterbahnen 21, 22, 23 und 24 angeordnet.Supporting
Aus den
Um die elektrische Verbindung zwischen der Schnappscheibe 9 und den jeweiligen Schaltkontakten 12, 13 zu verbessern, kann an der Unterseite der Schnappscheibe 9 in deren Zentralbereich eine entsprechende Anformung in Form einer Wölbung oder Kuppel vorgesehen sein.In order to improve the electrical connection between the
In
Durch das erfindungsgemäße Herstellungsverfahren gemäß
Claims (8)
dadurch gekennzeichnet,
dass senkrecht zu den vier Leiterbahnen (21, 22, 23, 24) zwei zueinander beabstandete Stutzkörper (25, 26) vorgesehen sind, die in einer Ebene angeordnet sind, die zwischen den vier Leiterbahnen (21, 22, 23, 24) und der Schnappscheibe (9) verlaufen,
und dass die Schnappscheibe (9) während der Zustellbewegung von dem Stützkörper (25, 26) nach Art einer Wippe abgestützt ist, derart, dass der außenseitig zu den Stützkörpern (25, 26) verlaufende Bereich der Schnappscheibe (9) von der ersten und zweiten Leiterbahn (21, 22) abgehoben ist und gleichzeitig die Schnappscheibe (9) auf den inneren dritten und vierten Leiterbahnen (23, 24) aufliegt und mit diesen elektrisch verbunden ist.Device (1) as an interface for an electrically operated machine tool or other electrical device and a person for converting a mechanical feed movement (2) into an electrical switching signal (12), consisting of:
characterized,
that perpendicular to the four conductor tracks (21, 22, 23, 24) two spaced-apart support bodies (25, 26) are provided, which are arranged in a plane between the four conductor tracks (21, 22, 23, 24) and the Snap disk (9) run,
and that the snap disk (9) is supported by the support body (25, 26) in the manner of a rocker during the feed movement, in such a way that the area of the snap disk (9) extending on the outside to the support bodies (25, 26) is supported by the first and second Conductor track (21, 22) is lifted and at the same time the snap disk (9) rests on the inner third and fourth conductor tracks (23, 24) and is electrically connected to them.
dadurch gekennzeichnet,
dass die erste und zweite äußere Leiterbahn (21, 22) parallel zueinander verlaufen, dass die dritte und vierte innere Leiterbahn (23, 24) parallel zu der ersten und zweiten Leiterbahn (21, 22) und zwischen diesen angeordnet sind, dass die dritten und vierten Leiterbahnen (23, 24) fluchtend zueinander verlaufen und im Bereich des Zentrums (6) der Aussparung (4) ausgerichtet und dort räumlich voneinander getrennt sind,Device according to claim 1,
characterized,
that the first and second outer conductor tracks (21, 22) run parallel to one another, that the third and fourth inner conductor tracks (23, 24) are arranged parallel to the first and second conductor tracks (21, 22) and between them, that the third and fourth conductor tracks (23, 24) run in alignment with one another and are aligned in the area of the center (6) of the recess (4) and are spatially separated from one another there,
dadurch gekennzeichnet,
dass die vier Leiterbahnen (21, 22, 23, 24) in einer gemeinsamen Ebene angeordnet sind und dass der Außenumfang der Schnappscheibe (9) im unbetätigten Zustand auf der ersten und zweiten Leiterbahn (21, 22) in den Eckbereichen der Aussparung (4) auf den äußeren Leiterbahnen 21 und 22 aufliegt.Device according to claim 1 or 2,
characterized,
that the four conductor tracks (21, 22, 23, 24) are arranged in a common plane and that the outer circumference of the snap disk (9) in the non-actuated state on the first and second conductor tracks (21, 22) in the corner areas of the recess (4) rests on the outer conductor tracks 21 and 22.
dadurch gekennzeichnet,
dass die Stützkörper (25, 26) als Stege ausgebildet sind und dass die Stege (25, 26) an der Innenwand der Aufnahmeöffnung (4) des Gehäuses (3) befestigt oder an diese eingearbeitet sind.Device according to one of the preceding claims,
characterized,
that the support bodies (25, 26) are designed as webs and that the webs (25, 26) are attached to the inner wall of the receiving opening (4) of the housing (3) or are incorporated into this.
dadurch gekennzeichnet,
dass die Schnappscheibe (9) domförmig nach außen gebogen ist und entgegen der Bewegungsrichtung durch das Druckstück (5) vorgespannt ist.Device according to one of the preceding claims,
characterized,
that the snap disk (9) is bent outwards in the shape of a dome and is biased against the direction of movement by the pressure piece (5).
dadurch gekennzeichnet,
dass die Leiterplatte (10) als Stanzgitter (20) bestehend aus den vier Leiterbahnen (21, 22, 23, 24) hergestellt ist.Device according to one of the preceding claims,
characterized,
that the circuit board (10) is made as a stamped grid (20) consisting of the four conductor tracks (21, 22, 23, 24).
dadurch gekennzeichnet,
dass das Stanzgitter (20) mit einem elektrisch isolierenden Werkstoff, vorzugsweise aus Kunststoff, umspritzt oder ummantelt ist, dass Bereiche der Leiterbahnen (21, 22, 23, 24) in Richtung der Schnappscheibe (9) offen bzw. frei zugänglich sind und dass die frei zugänglichen Bereiche der Leiterbahnen (21, 22, 23, 24) als Schaltflächen (12, 13) für die Schnappscheibe (9) dienen.Device according to claim 6,
characterized,
that the lead frame (20) is molded or sheathed with an electrically insulating material, preferably made of plastic, that areas of the conductor tracks (21, 22, 23, 24) are open or freely accessible in the direction of the snap disk (9) and that the freely accessible areas of the conductor tracks (21, 22, 23, 24) serve as buttons (12, 13) for the snap disk (9).
dadurch gekennzeichnet,
dass die Stutzkörper (25, 26) zwischen den Schaltflächen (12, 13) angeordnet sind und gleich weit zu den Schaltkontakten (12) der ersten und zweiten Leiterbahnen (21, 22) und der Schaltkontakte (13) der dritten und vierten Leiterbahnen (23, 24) beabstandet ist.Device according to claim 6 or 7,
characterized,
that the support bodies (25, 26) are arranged between the buttons (12, 13) and are at the same distance from the switching contacts (12) of the first and second conductor tracks (21, 22) and the switching contacts (13) of the third and fourth conductor tracks (23 , 24) is spaced apart.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19172270.1A EP3734629B1 (en) | 2019-05-02 | 2019-05-02 | Switching device |
ES19172270T ES2951583T3 (en) | 2019-05-02 | 2019-05-02 | Switching device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19172270.1A EP3734629B1 (en) | 2019-05-02 | 2019-05-02 | Switching device |
Publications (2)
Publication Number | Publication Date |
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EP3734629A1 true EP3734629A1 (en) | 2020-11-04 |
EP3734629B1 EP3734629B1 (en) | 2023-06-07 |
Family
ID=66529754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19172270.1A Active EP3734629B1 (en) | 2019-05-02 | 2019-05-02 | Switching device |
Country Status (2)
Country | Link |
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EP (1) | EP3734629B1 (en) |
ES (1) | ES2951583T3 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2531841A1 (en) * | 1975-07-16 | 1977-01-20 | Schadow Rudolf Gmbh | ELECTRIC SNAP SWITCH |
FR2841037A1 (en) * | 2002-06-13 | 2003-12-19 | Itt Mfg Enterprises Inc | Push button switch normally closed having contact carriers isolating material held and conductor strip forming contact/button activated with carriers released when button pushed. |
EP1750291A1 (en) | 2005-08-05 | 2007-02-07 | RAFI GmbH & Co. KG | Microswitch |
US20110233037A1 (en) * | 2010-03-26 | 2011-09-29 | Curbell Electronics, Inc. | Normally Closed Dome Switch |
-
2019
- 2019-05-02 EP EP19172270.1A patent/EP3734629B1/en active Active
- 2019-05-02 ES ES19172270T patent/ES2951583T3/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2531841A1 (en) * | 1975-07-16 | 1977-01-20 | Schadow Rudolf Gmbh | ELECTRIC SNAP SWITCH |
FR2841037A1 (en) * | 2002-06-13 | 2003-12-19 | Itt Mfg Enterprises Inc | Push button switch normally closed having contact carriers isolating material held and conductor strip forming contact/button activated with carriers released when button pushed. |
EP1750291A1 (en) | 2005-08-05 | 2007-02-07 | RAFI GmbH & Co. KG | Microswitch |
US20110233037A1 (en) * | 2010-03-26 | 2011-09-29 | Curbell Electronics, Inc. | Normally Closed Dome Switch |
Also Published As
Publication number | Publication date |
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EP3734629B1 (en) | 2023-06-07 |
ES2951583T3 (en) | 2023-10-23 |
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