EP0577859B1 - Keyboard - Google Patents
Keyboard Download PDFInfo
- Publication number
- EP0577859B1 EP0577859B1 EP19920111226 EP92111226A EP0577859B1 EP 0577859 B1 EP0577859 B1 EP 0577859B1 EP 19920111226 EP19920111226 EP 19920111226 EP 92111226 A EP92111226 A EP 92111226A EP 0577859 B1 EP0577859 B1 EP 0577859B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- keyboard
- sealing film
- keys
- frames
- light
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 15
- 210000003454 tympanic membrane Anatomy 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000000881 depressing effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H01H13/02—Details
- H01H13/023—Light-emitting indicators
-
- 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
- H01H13/02—Details
- H01H13/04—Cases; Covers
- H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
-
- 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
Definitions
- the invention relates to a keyboard that can be assembled from individual buttons that can be switched by pressing button caps, and is protected against splashing water, in particular for machine tool and robot controls Keys are arranged on a circuit board and the key caps are stored in a keyboard field.
- the object of the invention is to design a keyboard of the type mentioned at the outset in such a way that the requirements for rough industrial use can be met in the simplest possible way.
- this object is achieved in that between the circuit board and the keypad, the buttons are placed laterally surrounding frames and that the sealing film is stretched over the frame in the manner of an eardrum.
- This sealing film in the manner of an eardrum protects all the buttons arranged in the frame from environmental influences and, due to its mechanical tension, realizes the resetting of the actual sensor caps.
- the sealing film is transparent and thus releases an optical path, it is possible from To transmit optical signals inside the keyboard or vice versa.
- light guide bodies are arranged at the light exits. With the help of these light guide bodies, a defined radiation behavior of the light can be easily realized.
- a honeycomb body composed of individual frames can be assembled in a modular manner, different types of keyboards can be realized relatively easily. Furthermore, a tolerance compensation, which is desired, for example, in the case of unplanned printed circuit boards or front plates, is made possible by lateral displacement of the individual frames.
- the illustration shows, in the form of an exploded drawing, sections of a printed circuit board LP on which a key T can be placed, the connection contacts of which, which are not visible in the illustration, grip through bushings D and then disappear with the conductor arrangement of the printed circuit board LP are.
- the key T is pressed by depressing a plunger ST, which is symbolically indicated in the illustration by a cylinder body.
- the button T sitting directly on the circuit board LP in the assembled state is surrounded by a frame R, which can be part of a honeycomb structure made up of several frames, so that this frame R also rests directly on the circuit board LP.
- the frame R is also supported against a front panel FP, a sealing film DF being clamped between the front panel FP and the frame R with fastening means not shown for the sake of clarity.
- the sealing film DF now stretches over the frame R in the manner of an eardrum such that the plunger ST has not yet been actuated. It is only when the sealing film DF is pressed down in the direction of the plunger ST that a switching process is triggered. This depressing takes place with the aid of a tactile cap TK, which is mounted in a recess A of the front panel FP. A reset force for the keycap TK is ensured by means of the sealing film DF.
- the process for actuating the key T then proceeds as follows: the push-button cap TK held in its starting position by the sealing film DF is moved towards the plunger against the pressure of the so-called eardrum, the plunger ST releases the contact of a contact of the key T off and when the operator reduces the pressure on the tactile cap TK, this is first reset to its initial position via the tappet restoring force and then via the restoring force of the sealing film DF.
- the sealing film DF thus has a dual function. It seals the electrical elements of the keyboard against environmental influences and it realizes the restoring force for the probe caps. At this point it should be pointed out again that in the exemplary embodiment only a single key of a keyboard is shown. Of course, many keys can be arranged next to each other in a matrix, so to speak, and are only covered by a single sealing film if necessary.
- the push-button caps for example the push-button cap TK
- the push-button caps have a form fit that can be overcome from the front with respect to the recess A of the front panel FP.
- This can be designed, for example, so that notches R1 and R2 of the tactile cap TK are provided with notches E (visible with notch R1), so that the notches R1 and R2 can be deformed by means of a tool under lateral pressure in order to cancel the latching effect.
- the tactile cap TK can then be removed from the recess A.
- R light-emitting diodes e.g. the light-emitting diode LED
- the sealing film DF is transparent
- Additional light guide bodies LL can be provided in the front panel FP for the defined guidance of the light exit.
Landscapes
- Push-Button Switches (AREA)
- Input From Keyboards Or The Like (AREA)
Description
Die Erfindung bezieht sich auf eine aus einzelnen, durch Betätigen von Tastkappen schaltbaren Tastern modular zusammenfügbare, gegen Spritzwasser geschützte Tastatur, insbesondere für Werkzeugmaschinen- und Robotersteuerungen, wobei zwischen den Tastkappen und den Tastern eine elastische, die Tastatur großflächig überstreichende Dichtfolie vorgesehen ist, wobei die Tasten auf einer Leiterplatte angeordnet sind und wobei die Tastkappen in einem Tastaturfeld gelagert sind.The invention relates to a keyboard that can be assembled from individual buttons that can be switched by pressing button caps, and is protected against splashing water, in particular for machine tool and robot controls Keys are arranged on a circuit board and the key caps are stored in a keyboard field.
Derartige Tastaturen für rauhen Industrieeinsatz sind seit langem handelsüblich. Es sei in diesem Zusammenhang auf Betätigungselemente gemäß der DE-OS36 02 245 verwiesen. Nachteilig ist jedoch der große technische Aufwand, der bei solchen Tastaturen, insbesondere für eine mechanische Komponente mit ausreichender Spannung für die Rückstellkraft für die Tasten, zu treffen ist.Such keyboards for harsh industrial use have long been commercially available. In this context, reference is made to actuators according to DE-OS36 02 245. A disadvantage, however, is the great technical effort that must be made with such keyboards, in particular for a mechanical component with sufficient tension for the restoring force for the keys.
Aufgabe der Erfindung ist es, eine Tastatur der eingangs genannten Art so auszubilden, daß in möglichst einfacher Weise die Erfordernisse für einen rauhen Industrieeinsatz erfüllbar sind.The object of the invention is to design a keyboard of the type mentioned at the outset in such a way that the requirements for rough industrial use can be met in the simplest possible way.
Gemäß der Erfindung wird diese Aufgabe dadurch gelöst, daß zwischen die Leiterplatte und das Tastaturfeld die Taster seitlich umgebende Rahmen gesetzt sind und daß die Dichtfolie nach Art eines Trommelfells über die Rahmen verspannt ist. Diese Dichtfolie nach Art eines Trommelfells schützt sämtliche in den Rahmen angeordnete Taster vor Umwelteinflüssen und realisiert aufgrund seiner mechanischen Spannung die Rückstellung der eigentlichen Tastkappen.According to the invention, this object is achieved in that between the circuit board and the keypad, the buttons are placed laterally surrounding frames and that the sealing film is stretched over the frame in the manner of an eardrum. This sealing film in the manner of an eardrum protects all the buttons arranged in the frame from environmental influences and, due to its mechanical tension, realizes the resetting of the actual sensor caps.
Dadurch, daß die Dichtfolie transparent ausgebildet ist und damit eine optische Strecke freigibt, ist es möglich, vom Tastaturinneren nach außen bzw. umgekehrt optische Signale zu übertragen. In diesem Zusammenhang erweist es sich für Anzeigezwecke als besonders vorteilhaft, daß im Stegbereich der Rahmen lichtemittirende Elemente vorgesehen sind und daß an der Frontseite des Tastaturfeldes korrespondierende Lichtaustritte angebracht sind. Zur Verbesserung der Erkennbarkeit des emittierten Lichtes für den Beobachter erweist es sich in diesem Zusammenhang als vorteilhaft, daß an den Lichtaustritten Lichtleitkörper angeordnet sind. Mit Hilfe dieser Lichtleitkörper ist ein definiertes Abstrahlverhalten des Lichts leicht realisierbar.The fact that the sealing film is transparent and thus releases an optical path, it is possible from To transmit optical signals inside the keyboard or vice versa. In this context, it has proven to be particularly advantageous for display purposes that light-emitting elements are provided in the web area of the frame and that corresponding light outlets are provided on the front of the keyboard field. In order to improve the recognizability of the emitted light for the observer, it proves to be advantageous in this context that light guide bodies are arranged at the light exits. With the help of these light guide bodies, a defined radiation behavior of the light can be easily realized.
Dadurch, daß ein Wabenkörper aus Einzelrahmen modular zusammenfügbar ist, können relativ leicht verschiedenartige Tastaturen realisiert werden. Ferner wird durch eine seitliche Verschiebbarkeit der Einzelrahmen ein Toleranzausgleich möglich, der beispielsweise bei unplanen Leiterplatten bzw. Frontplatten erwünscht wird.Because a honeycomb body composed of individual frames can be assembled in a modular manner, different types of keyboards can be realized relatively easily. Furthermore, a tolerance compensation, which is desired, for example, in the case of unplanned printed circuit boards or front plates, is made possible by lateral displacement of the individual frames.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.An embodiment of the invention is shown in the drawing and is explained in more detail below.
Die Darstellung zeigt in Form einer Explosivzeichnung abschnittsweise eine Leiterplatte LP, auf die eine Taste T aufsetzbar ist, deren Anschlußkontakte, die in der Darstellung nicht sichtbar sind, durch Durchführungen D greifen und dann mit der Leiteranordnung der Leiterplatte LP verschwallbar sind. Das Betätigen der Taste T erfolgt durch Niederdrücken eines Stößels ST, der in der Darstellung durch einen Zylinderkörper symbolisch angedeutet ist. Die im zusammengebauten Zustand unmittelbar auf der Leiterplatte LP aufsitzende Taste T wird von einem Rahmen R, der Teil eines wabenförmigen Gebildes aus mehreren Rahmen sein kann, so umfaßt, daß dieser Rahmen R ebenfalls unmittelbar auf der Leiterplatte LP aufliegt. Der Rahmen R stützt sich dabei ferner gegen eine Frontplatte FP ab, wobei zwischen die Frontplatte FP und dem Rahmen R eine Dichtfolie DF mit der Übersichtlichkeit halber nicht dargestellten Befestigungsmitteln verspannt ist. Die Dichtfolie DF spannt sich nunmehr nach Art eines Trommelfells über den Rahmen R dergestalt, daß der Stößel ST noch nicht betätigt ist. Erst ein Niederdrücken der Dichtfolie DF in Richtung auf den Stößel ST hin löst einen Schaltvorgang aus. Dieses Niederdrücken erfolgt mit Hilfe einer Tastkappe TK, die in einer Ausnehmung A der Frontplatte FP gelagert ist. Dabei wird mittels der Dichtfolie DF eine Rückstellkraft für die Tastenkappe TK sichergestellt.The illustration shows, in the form of an exploded drawing, sections of a printed circuit board LP on which a key T can be placed, the connection contacts of which, which are not visible in the illustration, grip through bushings D and then disappear with the conductor arrangement of the printed circuit board LP are. The key T is pressed by depressing a plunger ST, which is symbolically indicated in the illustration by a cylinder body. The button T sitting directly on the circuit board LP in the assembled state is surrounded by a frame R, which can be part of a honeycomb structure made up of several frames, so that this frame R also rests directly on the circuit board LP. The frame R is also supported against a front panel FP, a sealing film DF being clamped between the front panel FP and the frame R with fastening means not shown for the sake of clarity. The sealing film DF now stretches over the frame R in the manner of an eardrum such that the plunger ST has not yet been actuated. It is only when the sealing film DF is pressed down in the direction of the plunger ST that a switching process is triggered. This depressing takes place with the aid of a tactile cap TK, which is mounted in a recess A of the front panel FP. A reset force for the keycap TK is ensured by means of the sealing film DF.
Der Vorgang zum Betätigen der Taste T läuft dann also wie folgt ab: Die von der Dichtfolie DF in ihrer Ausgangslage gehaltene Tastkappe TK wird gegen den Druck des sogenannten Trommelfells in Richtung auf den Stößel hin bewegt, der Stößel ST löst das Kontaktieren eines Kontaktes der Taste T aus und wenn der Bediener den Druck auf die Tastkappe TK reduziert, wird diese zunächst über die Stößelrückstellkraft und dann über die Rückstellkraft der Dichtfolie DF in ihre Ausgangslage zurückgesetzt.The process for actuating the key T then proceeds as follows: the push-button cap TK held in its starting position by the sealing film DF is moved towards the plunger against the pressure of the so-called eardrum, the plunger ST releases the contact of a contact of the key T off and when the operator reduces the pressure on the tactile cap TK, this is first reset to its initial position via the tappet restoring force and then via the restoring force of the sealing film DF.
Die Dichtfolie DF nimmt damit also eine Doppelfunktion war. Sie dichtet die elektrischen Elemente der Tastatur gegenüber Umwelteinflüssen und sie realisiert die Rückstellkraft für die Tastkappen. An dieser Stelle sei nochmals darauf hingewiesen, daß im Ausführungsbeispiel nur eine einzige Taste einer Tastatur gezeigt ist. Selbstverständlich können viele Tasten sozusagen matrixförmig nebeneinander angeordnet sein und werden dennoch bedarfsweise nur von einer einzigen Dichtfolie überspannt.The sealing film DF thus has a dual function. It seals the electrical elements of the keyboard against environmental influences and it realizes the restoring force for the probe caps. At this point it should be pointed out again that in the exemplary embodiment only a single key of a keyboard is shown. Of course, many keys can be arranged next to each other in a matrix, so to speak, and are only covered by a single sealing film if necessary.
Für den Fall, daß die Tastkappen, so beispielsweise die Tastkappe TK aus der Tastatur entfernt werden sollen, sei es, daß die Tastkappen mechanisch beschädigt worden sind oder sei es, daß eine neue Beschriftung der Tastatur mittels neuer Tastkappen erfolgen soll, ist es möglich, die Tastkappen zur Frontseite der Tastatur hin zu entfernen. Dazu haben die Tastkappen, so zum Beispiel die Tastkappe TK, einen von der Frontseite her überwindbaren Formschluß gegenüber der Ausnehmung A der Frontplatte FP. Dieser kann beispielsweise so gestaltet sein, daß Rasten R1 und R2 der Tastkappe TK mit Einkerbungen E (sichtbar bei Raste R1) versehen sind, so daß die Rasten R1 und R2 bei seitlichem Druck mittels eines Werkzeuges verformbar sind, um die Rastwirkung aufzuheben. Daraufhin kann die Tastkappe TK aus der Ausnehmung A herausgenommen werden.In the event that the key caps, for example the key cap TK, are to be removed from the keyboard, be it that the key caps have been mechanically damaged or that the keyboard should be rewritten using new key caps, it is possible to remove the key caps towards the front of the keyboard. For this purpose, the push-button caps, for example the push-button cap TK, have a form fit that can be overcome from the front with respect to the recess A of the front panel FP. This can be designed, for example, so that notches R1 and R2 of the tactile cap TK are provided with notches E (visible with notch R1), so that the notches R1 and R2 can be deformed by means of a tool under lateral pressure in order to cancel the latching effect. The tactile cap TK can then be removed from the recess A.
In der Darstellung ist ferner gezeigt, daß am Randbereich des Rahmens R Leuchtdioden, so z.B. die Leuchtdiode LED, angeordnet sein können, die dann, wenn die Dichtfolie DF transparent ist, über Durchbrüche in der Frontplatte FP ein optisches Signal an die Tastaturoberfläche führen. Zur definierten Lenkung des Lichtaustritts können dabei in der Frontplatte FP zusätzliche Lichtleitkörper LL vorgesehen sein.The illustration also shows that R light-emitting diodes, e.g. the light-emitting diode LED can be arranged which, when the sealing film DF is transparent, lead to the keyboard surface via openings in the front panel FP. Additional light guide bodies LL can be provided in the front panel FP for the defined guidance of the light exit.
Claims (5)
- Keyboard which can be assembled in a modular manner from individual keys (T) operable by pressing key caps (TK) and which is protected against splashed water, in particular for machine-tool and robot controls, whereby an elastic sealing film (DF) coating a large area of the keyboard is provided between the key caps and the keys, whereby the keys are arranged on a printed circuit board (LP) and whereby the key caps are mounted in a keyboard field, characterized in that frames (R) surrounding the sides of the keys (T) are placed between the printed circuit board (LP) and the keyboard field (FP) and in that the sealing film (DF) is braced like a tympanic membrane across the frames (R).
- Keyboard according to claim 1, characterized in that the sealing film (DF) is constructed to be transparent and thus enables an optical path.
- Keyboard according to claim 2, characterized in that light-emitting elements (LED) are provided in a bar region of the frames (R) and in that corresponding light outlets are fitted to the front side of the keyboard field.
- Keyboard according to claim 3, characterized in that light conducting bodies (LL) are arranged at the light outlets.
- Keyboard according to one of the above claims, characterized in that a honeycomb body can be assembled in a modular manner from individual frames (R).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59202627T DE59202627D1 (en) | 1992-07-02 | 1992-07-02 | Keyboard. |
| EP19920111226 EP0577859B1 (en) | 1992-07-02 | 1992-07-02 | Keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19920111226 EP0577859B1 (en) | 1992-07-02 | 1992-07-02 | Keyboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0577859A1 EP0577859A1 (en) | 1994-01-12 |
| EP0577859B1 true EP0577859B1 (en) | 1995-06-21 |
Family
ID=8209769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19920111226 Expired - Lifetime EP0577859B1 (en) | 1992-07-02 | 1992-07-02 | Keyboard |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0577859B1 (en) |
| DE (1) | DE59202627D1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2046524A (en) * | 1979-02-28 | 1980-11-12 | Invader Keyboards Ltd | Improvements relating to electric switches |
| DE3407937A1 (en) * | 1984-03-03 | 1985-09-12 | Debeg GmbH, 2000 Hamburg | Apparatus input keyboard having operating elements which can be operated mechanically and can be sensed |
| FR2562286B1 (en) * | 1984-03-28 | 1986-07-18 | Telemecanique Electrique | KEYBOARD |
| JPS6180540U (en) * | 1984-11-01 | 1986-05-29 | ||
| DE3602245A1 (en) * | 1986-01-25 | 1987-08-13 | Bosch Gmbh Robert | Telecommunications apparatus having a box-shaped housing |
| DE3812635A1 (en) * | 1988-03-29 | 1989-10-12 | Tschudin & Heid Ag | DEVICE WITH A CARRIER AND AT LEAST ONE HOUSING AND A PIEZOELECTRICAL ELEMENT, ELECTRICAL SWITCHING DEVICE |
-
1992
- 1992-07-02 EP EP19920111226 patent/EP0577859B1/en not_active Expired - Lifetime
- 1992-07-02 DE DE59202627T patent/DE59202627D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0577859A1 (en) | 1994-01-12 |
| DE59202627D1 (en) | 1995-07-27 |
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