EP0354340A2 - Keyboard - Google Patents

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Publication number
EP0354340A2
EP0354340A2 EP89111945A EP89111945A EP0354340A2 EP 0354340 A2 EP0354340 A2 EP 0354340A2 EP 89111945 A EP89111945 A EP 89111945A EP 89111945 A EP89111945 A EP 89111945A EP 0354340 A2 EP0354340 A2 EP 0354340A2
Authority
EP
European Patent Office
Prior art keywords
front frame
circuit board
keyboard
base part
keyboard according
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
Application number
EP89111945A
Other languages
German (de)
French (fr)
Other versions
EP0354340A3 (en
EP0354340B1 (en
Inventor
Paul Blaser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Digital Kienzle Computersysteme GmbH and Co KG
Original Assignee
Digital Kienzle Computersysteme GmbH and Co KG
Mannesmann Kienzle GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Digital Kienzle Computersysteme GmbH and Co KG, Mannesmann Kienzle GmbH filed Critical Digital Kienzle Computersysteme GmbH and Co KG
Publication of EP0354340A2 publication Critical patent/EP0354340A2/en
Publication of EP0354340A3 publication Critical patent/EP0354340A3/en
Application granted granted Critical
Publication of EP0354340B1 publication Critical patent/EP0354340B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H13/70—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/054—Mounting of key housings on same printed circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/034—Positioning of layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/042—Snap coupling; Snap mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/044—Injection moulding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/024—Miscellaneous with inductive switch

Definitions

  • the invention relates to a keyboard with a key-carrying circuit board and a housing.
  • Keyboards in particular those which, as autonomous aggregates, so to speak represent an auxiliary component of data processing systems, are expected to function without any doubt, to be exchangeable at any time or to be integrated into an existing device configuration and to be inexpensive.
  • keyboards generally meet the aesthetic and functional quality requirements of the office environment. In harsh operating and operating conditions, these keyboards often have defects due to temperature dependent strains. These are mainly due to the classic design of the keyboards with several storey-like components. In this respect, the construction of the known keyboards cannot meet the requirements of large-scale production with ultimately mechanical assembly.
  • the object of the present invention was therefore to optimize the construction of keyboards in such a way that on the one hand it meets the requirements with regard to economical production and on the other hand the different operating conditions of the keyboards.
  • the housing consists of a front frame and a base part, that mutually associated locking elements are formed on the front frame and the base part and that the front frame and base part are designed such that by joining the front frame and base part and engaging the locking elements the intermediate circuit board is held essentially free of play.
  • the keyboard according to the invention consists only of a front frame, a base part and a preassembled module, namely a circuit board directly equipped with keys, and that these Components are connected to each other only by snap connections.
  • the circuit board between the front frame and the base part when they are locked together, so to speak, "floating", that is, the housing formed from the front frame and base part can be opposite the circuit board z. B. stretch depending on the temperature, without causing stresses in the circuit board due to such expansion.
  • an alignment element is formed on a central point of the front frame, for example on a web dividing the keyboard into individual keypads, which cooperates with an opening in the printed circuit board and, by providing relatively narrow tolerances for this connection, provides a relatively precise fixation of the two components at least in the direction of the largest dimension of the keyboard.
  • At least one additional alignment element formed on the front frame and a further opening in the printed circuit board associated therewith are provided in order to form, so to speak, an anti-rotation device between the front frame and the printed circuit board or a fixation in a second dimension to allow is designed as an elongated hole
  • the expansion amounts of the housing components are halved. Tolerance or temperature-related changes in the gap widths between the dividing webs of the front frame and the rows of key heads are less effective due to this measure or are not noticeable at all.
  • the extensibility of the housing components relative to one another and relative to the printed circuit board, or the adaptability itself avoids malfunctions that change within the given rough tolerances.
  • the front frame and base part takes place, so to speak, only on one line, namely along the greatest extent of the keyboard, which in particular ensures that the locking elements that are effective on this line are safe to engage.
  • the formation of alignment elements and locking elements in such a way that the same opening in the printed circuit board can be assigned to both is one further advantage of the invention.
  • the front frame is designed in such a way that it overlaps the edge of the trough-like base part with all-round spacing. In the same way, each latching connection is also assigned sufficient lateral clearance.
  • the front frame and base part are designed as relatively simple parts, so that the molding effort is low.
  • FIGURE 1 shows an alphanumeric keyboard 1 with a letter, a number, a function and a so-called cursor keypad 2, 3, 4 and 5. Bars 7, 8 and 9 are formed on a front frame 6, which separate the individual keypads 2, 3, 4 and 5 from each other. With 10 a together with the front frame 6, the housing of the keyboard 1 forming bottom part is designated.
  • FIGURE 2 shows, in a perspective staggered arrangement, the rear and bottom views of the components forming the keyboard 1, namely the front frame 6, the trough-shaped bottom part 10 and a printed circuit board carrying the keys, of which a FIGURE 1 denotes 11 12.
  • a FIGURE 1 denotes 11 12.
  • the printed circuit board 12 on both sides crossing, unspecified conductor tracks are applied, which form induction coils at the crossing points together with a hole in the printed circuit board. I.e. in the selected embodiment, the signal is given inductively.
  • the individual, unspecified legs of the front frame 6 and the webs 7, 8 and 9 are profiled U-shaped, not least for injection molding reasons, so that a peripheral outer wall 13 and inner wall parts, of which one designated by 14 are formed.
  • the inner wall parts 14 of the webs 7, 8 and 9 and the leg of the front frame 6 form the support for the printed circuit board 12, the end faces of the wall parts 14 preferably not being formed in one and the same plane and thus a point or section support the circuit board 12 is achieved.
  • tongues 15 and 16 are formed on the web 7, which represent alignment elements. These engage when placing the circuit board 12 through an opening 17 in the circuit board 12 and, with respect to the larger dimension of the keyboard 1, bring about an exact, mutual positioning of the circuit board 12 and the front frame 6.
  • a latching hook 18 also formed on the web 7 forms together with one Rib 19 formed transversely to the web 7, a further alignment element which, together with an elongated hole 20 provided in the printed circuit board 12, brings about an exact fixing of the front frame 6 and printed circuit board 12 exclusively in the shorter dimension of the keyboard 1.
  • the opening 17 is also an elongated hole, specifically in the direction of the short dimension, further alignment and locking elements and an elongated hole are preferably provided symmetrically to the opening 17, the alignment and locking elements 18, 19 and the elongated hole 20.
  • the formation of the alignment and locking elements can be seen better in FIGURE 5.
  • the rib 19 connects, as FIGURE 5 shows, the walls 14 of the web 7 and thus also serves as a stabilization.
  • the dash-dotted lines L1 and L2 symbolize the position of the lower edge of the elongated holes 17 and 20 in the printed circuit board 12 when it is assigned to the relevant front frame.
  • Pockets 21 are formed in the bottom part 10, into which the latching hooks 18 engage.
  • the opening 22 is assigned to the tongues 15 and 16, so that since the alignment elements 18, 19 are designed such that they also engage in the pockets 21, the bottom part 10 and the front frame 6 are positioned relative to one another on one of the webs 7 Line is done.
  • 23 and 24 designate two of three locking hooks formed on the base part 10, which engage in openings 25 and 26 in the wall parts 14 of the front frame 6 when the housing is joined together. Sufficient free space is provided on the side for all latching connections in the longitudinal direction of the keyboard 1.
  • supports 27, which each have a recessed grip 28 assigned to them are pivotably mounted in the base part 10 of the inclination adjustment of the keyboard 1.
  • a bulge 29 is formed in the base part 10, via which the keyboard 1, if necessary, additional units can be assigned.
  • FIGURE 3 From the sectional view FIGURE 3 it can be seen that 10 ribs 30 are formed in the bottom part, on which, when the housing components 6, 10 are locked together, the printed circuit board 12 rests and that the printed circuit board 12 only between the wall parts 14 of the front frame 6 and the ribs 30 is held or is stored.
  • FIGURE 3 also shows that the front frame 6 engages around the trough-shaped bottom part 10 with a spacing on all sides.
  • the keys are 11 directly attached to the printed circuit board 12, ie the respective key base 31 is latched to the printed circuit board 12, for example, and the key head 32 is spring-mounted on the key base in a manner known per se by means of a suitable column guide.
  • the sectional view FIGURE 4 again shows the integrated construction of the alignment and locking elements 18, 19 formed on the web 7 and assigned to the opening 20 in the printed circuit board 12 and the pocket 21 in the base part 10.

Abstract

Es wird eine Tastatur (1) vorgeschlagen, die konstruktiv derart gestaltet ist, daß sie möglichst preisgünstig in Großserie hergestellt werden kann und dennoch hohen Ansprüchen an Funktionsfähigkeit und Aussehen gerecht wird. Im einzelnen besteht das Gehäuse der Tastatur (1) aus einem Frontrahmen (6) und einem Bodenteil (10), die durch Rastelemente (18/21 und 23/25, 24/26) miteinander verbindbar sind und dabei eine die Tasten (11) tragende Leiterplatte (12), die über Ausrichtelemente (15/16 und 18/19) dem Frontrahmen (6) mit relativ hoher Genauigkeit zugeordnet ist, sozusagen schwimmend lagern.A keyboard (1) is proposed which is structurally designed in such a way that it can be mass-produced as inexpensively as possible and yet meets high demands on functionality and appearance. In particular, the housing of the keyboard (1) consists of a front frame (6) and a base part (10), which can be connected to one another by means of locking elements (18/21 and 23/25, 24/26) and thereby one of the keys (11) load-bearing printed circuit board (12), which is assigned to the front frame (6) with relatively high accuracy via alignment elements (15/16 and 18/19), so to speak floating.

Description

Die Erfindung betrifft eine Tastatur mit einer Tasten tragenden Leiterplatte und einem Gehäuse.The invention relates to a keyboard with a key-carrying circuit board and a housing.

Von Tastaturen, insbesondere solchen, die als autonome Aggregate sozusagen eine Hilfskomponente von Datenverarbei­tungsanlagen darstellen, wird erwartet, daß sie zweifelsfrei funktionieren, jederzeit ausgetauscht werden können bzw. sich in eine vorhandene Gerätekonfiguration integrieren lassen und preisgünstig sind.Keyboards, in particular those which, as autonomous aggregates, so to speak represent an auxiliary component of data processing systems, are expected to function without any doubt, to be exchangeable at any time or to be integrated into an existing device configuration and to be inexpensive.

Solche Bedingungen zwingen zur Standardisierung der Tastaturen mit dem Ziel, hohe Stückzahlen zu erreichen und mit möglichst wenig Arbeitsgängen und formtechnisch einfachen Bauteilen die Voraussetzungen für Großserienfertigung und maschinelle Montage zu schaffen.Such conditions force keyboards to be standardized with the aim of achieving large quantities and creating the prerequisites for large-scale production and mechanical assembly with as few operations and simple components as possible.

Verringern der Bauteileanzahl, Verbilligen in Fertigung und Montage und Fertigungstoleranzen, die eine Großserien­fertigung gestatten, beeinträchtigen jedoch in der Regel die Stabilität und somit auch die Funktionssicherheit, insbesondere wenn es sich um maßlich relativ große und spritzgußtechnisch hergestellte Teile handelt.However, reducing the number of components, cheaper manufacturing and assembly, and manufacturing tolerances that permit large-scale production, generally affect stability and thus also functional reliability, especially when it comes to relatively large parts that are injection molded.

Den Bemühungen um wirtschaftliche Fertigung steht gegenüber, daß für den Einsatz solcher Tastaturen im klimakon­stanten und verschmutzungsarmen Büromilieu, im Schalterbereich von Banken u. dergl. eine hohe Qualität auch hinsichtlich der äußeren Erscheinung gefordert werden muß und für den Einsatz im Fertigungsbereich, in Tankstellen, in Lagerräumen, auf Baustellen, wo Umwelteinflüsse überwiegen, die Funktionen der Tastaturen für unter Umständen extreme Einsatzbedingungen ausgelegt sein müssen bzw. durch solche Umwelteinflüsse nicht gestört werden dürfen.The efforts for economical production is opposed to the fact that for the use of such keyboards in the climate-constant and low-pollution office environment, in the counter area of banks and the like. the like. A high quality must also be required with regard to the external appearance and for use in the production area, in petrol stations, in storage rooms, on construction sites where environmental influences predominate, the functions of the keyboards must be designed for extreme operating conditions, or due to such environmental influences must not be disturbed.

Im Handel befindliche Tastaturen entsprechen im allge­meinen den ästhetischen und funktionalen Qualitätsansprüchen des Büromilieus. Bei rauheren Einsatz- und Betriebsbedingungen weisen diese Tastaturen vielfach Mängel infolge temperatur­ abhängiger Dehnungen auf. Diese sind im wesentlichen bedingt durch die klassische Bauweise der Tastaturen mit mehreren stockwerkartig miteinander verschraubten Bauteilen. Insofern kann die Konstruktion der bekannten Tastaturen auch nicht den Anforderungen einer Großserienfertigung mit letzen Endes maschineller Montage gerecht werden.Commercially available keyboards generally meet the aesthetic and functional quality requirements of the office environment. In harsh operating and operating conditions, these keyboards often have defects due to temperature dependent strains. These are mainly due to the classic design of the keyboards with several storey-like components. In this respect, the construction of the known keyboards cannot meet the requirements of large-scale production with ultimately mechanical assembly.

Die Aufgabe der vorliegenden Erfindung bestand somit darin, die Konstruktion von Tastaturen derart zu optimieren, daß sie einerseits den Anforderungen hinsichtlich einer wirtschaftlichen Fertigung und andererseits den unterschied­lichen Einsatzbedingungen der Tastaturen gerecht wird.The object of the present invention was therefore to optimize the construction of keyboards in such a way that on the one hand it meets the requirements with regard to economical production and on the other hand the different operating conditions of the keyboards.

Die Lösung dieser Aufgabe sieht vor, daß das Gehäuse aus einem Frontrahmen und einem Bodenteil besteht, daß an dem Frontrahmen und dem Bodenteil einander zugeordnete Rastelemente ausgeformt sind und daß Frontrahmen und Bodenteil derart ausgebildet sind, daß durch Zusammenfügen von Frontrahmen und Bodenteil und Ineingriffgehen der Rastelemente die zwischen­liegende Leiterplatte im wesentlichen spielfrei gehaltert ist.The solution to this problem provides that the housing consists of a front frame and a base part, that mutually associated locking elements are formed on the front frame and the base part and that the front frame and base part are designed such that by joining the front frame and base part and engaging the locking elements the intermediate circuit board is held essentially free of play.

Vorteilhafte Ausgestaltungen der Erfindung beschreiben die Unteransprüche.Advantageous embodiments of the invention describe the subclaims.

Der Vorteil der gefundenen Lösung, der auch für alphanu­merische Tastaturen mit erheblichen Abmessungen gegeben ist, ist darin zu sehen, daß die erfindungsgemäße Tastatur lediglich aus einem Frontrahmen, einem Bodenteil und einer vormontierten Baugruppe, nämlich einer unmittelbar mit Tasten bestückten Leiterplatte, besteht und daß diese Bauteile ausschließlich durch Rastverbindungen miteinander verbunden sind. Dabei wird die Leiterplatte zwischen Frontrahmen und Bodenteil, wenn diese miteinander verrastet sind, sozusagen "schwimmend" gehalten, d. h. das aus Frontrahmen und Bodenteil gebildete Gehäuse kann sich gegenüber der Leiterplatte z. B. temperaturabhängig dehnen, ohne daß in der Leiterplatte aufgrund solcher Dehnung Spannungen entstehen. Mit der erfindungsgemäßen Konstruktion sind außerdem Toleranzadditionen senkrecht zur Tastenebene reduziert, und die in der Tastenebene liegenden Fertigungs­ toleranzen, die bei den spritzgußtechnisch hergestellten Gehäusebauteilen relativ grob gestaltet werden müssen, sind bezüglich der Montage der Tastatur weitgehend unwirksam.The advantage of the solution found, which is also given for alphanumeric keyboards with considerable dimensions, is that the keyboard according to the invention consists only of a front frame, a base part and a preassembled module, namely a circuit board directly equipped with keys, and that these Components are connected to each other only by snap connections. Here, the circuit board between the front frame and the base part, when they are locked together, so to speak, "floating", that is, the housing formed from the front frame and base part can be opposite the circuit board z. B. stretch depending on the temperature, without causing stresses in the circuit board due to such expansion. With the construction according to the invention, tolerance additions perpendicular to the key plane are also reduced, and the production lying in the key plane is reduced Tolerances, which have to be designed relatively roughly in the case of injection molded housing components, are largely ineffective with regard to the assembly of the keyboard.

Dieser Effekt wird dadurch erzielt, daß an einer zentralen Stelle des Frontrahmens, beispielsweise an einem die Tastatur in einzelne Tastenfelder teilenden Steg, ein Ausrichtelement angeformt ist, welches mit einer Öffnung in der Leiterplatte zusammenwirkt und, indem für diese Verbindung relativ enge Toleranzen vorgesehen sind, eine relativ genaue Fixierung der beiden Bauteile wenigstens in Richtung des Größtmaßes der Tastatur liefert. Wenigstens ein weiteres, am Frontrahmen ausgebildetes Ausrichtelement und eine diesem zugeordnete weitere Öffnung in der Leiterplatte sind vorgesehen, um sozusagen eine Verdrehsicherung zwischen Frontrahmen und Leiterplatte bzw. eine Fixierung in einer zweiten Dimension zu bilden, wobei die weitere Öffnung, um Dehnungen gegenüber der zentralen Fixierung zu ermöglichen, als Langloch ausgebildet istThis effect is achieved in that an alignment element is formed on a central point of the front frame, for example on a web dividing the keyboard into individual keypads, which cooperates with an opening in the printed circuit board and, by providing relatively narrow tolerances for this connection, provides a relatively precise fixation of the two components at least in the direction of the largest dimension of the keyboard. At least one additional alignment element formed on the front frame and a further opening in the printed circuit board associated therewith are provided in order to form, so to speak, an anti-rotation device between the front frame and the printed circuit board or a fixation in a second dimension to allow is designed as an elongated hole

Mit der zentralen Fixierung und den vorgesehenen Frei­heitsgraden wird eine Halbierung der Dehnungsbeträge der Gehäusebauteile erzielt. Toleranz- bzw. temperaturbedingte Veränderungen der Spaltbreiten zwischen den Teilungsstegen des Frontrahmens und den Tastenkopfreihen sind infolge dieser Maßnahme optisch weniger wirksam oder überhaupt nicht bemerkbar. Andererseits vermeidet die Dehnungsfähigkeit der Gehäusebauteile gegeneinander und gegenüber der Leiterplatte bzw. die Anpaßfähigkeit an sich innerhalb der gegeben groben Toleranzen ändernden Abmessungen Funktionsstörungen.With the central fixation and the intended degrees of freedom, the expansion amounts of the housing components are halved. Tolerance or temperature-related changes in the gap widths between the dividing webs of the front frame and the rows of key heads are less effective due to this measure or are not noticeable at all. On the other hand, the extensibility of the housing components relative to one another and relative to the printed circuit board, or the adaptability itself, avoids malfunctions that change within the given rough tolerances.

Vorteilhaft ist ferner, daß ein Ausrichten von Frontrahmen und Bodenteil sozusagen nur auf einer Linie, und zwar entlang der größten Ausdehnung der Tastatur erfolgt, wodurch insbesondere die Eingriffssicherheit der Rastelemente, die auf dieser Linie wirksam sind, gewährleistet ist. Die Ausbildung von Ausricht­elementen und Rastelementen derart, daß beiden ein und dieselbe Öffnung in der Leiterplatte zugeordnet werden kann, ist ein weiterer Vorzug der Erfindung. Ansonsten ist der Frontrahmen derart gestaltet, daß er mit allseitigem Abstand den Rand des wannenartig ausgebildeten Bodenteils übergreift. In gleicher Weise ist auch jeder Rastverbindung ausreichend seitlicher Freiraum zugeordnet. Es sei ferner noch erwähnt, daß Front­rahmen und Bodenteil als relativ einfache Teile gestaltet sind, so daß der Formaufwand gering ist.It is also advantageous that an alignment of the front frame and base part takes place, so to speak, only on one line, namely along the greatest extent of the keyboard, which in particular ensures that the locking elements that are effective on this line are safe to engage. The formation of alignment elements and locking elements in such a way that the same opening in the printed circuit board can be assigned to both is one further advantage of the invention. Otherwise, the front frame is designed in such a way that it overlaps the edge of the trough-like base part with all-round spacing. In the same way, each latching connection is also assigned sufficient lateral clearance. It should also be mentioned that the front frame and base part are designed as relatively simple parts, so that the molding effort is low.

Damit sind die Voraussetzungen für eine besonders unkomplizierte und bevorzugt maschinelle Montage gegeben, bei der der Frontrahmen mittels einer geeigneten Aufnahme gehalten wird, die mit den Tasten versehene Leiterplatte zugeführt, auf den Frontrahmen aufgelegt und mit den Ausrichtelementen in Eingriff gebracht wird und nachfolgend das Bodenteil mit dem Frontrahmen verrastet wird.This provides the prerequisites for a particularly uncomplicated and preferably mechanical assembly, in which the front frame is held by means of a suitable receptacle, the printed circuit board provided with the buttons, placed on the front frame and brought into engagement with the alignment elements and subsequently the bottom part with the front frame is locked.

Im folgenden sei die Erfindung anhand der beigefügten Zeichnungen, die ein Ausführungsbeispiel einer erfindungsgemäß gestalteten Tastatur darstellen, näher erläutert. Es zeigen

  • FIGUR 1 eine perspektivische Gesamtansicht der Tastatur,
  • FIGUR 2 eine perspektivisch gestaffelte Darstellung von Untersichten der entsprechend der Montagefolge zusammenzufü­genden Bauteile der Tastatur,
  • FIGUR 3 ein Schnittbild der Tastatur,
  • FIGUR 4 einen Teilschnitt der Tastatur im Bereich einer Rastverbindung,
  • FIGUR 5 eine perspektivische Teildarstellung der an einem Steg des Frontrahmens der Tastatur ausgebildeten Ausricht- und Rastelemente.
The invention is explained in more detail below with reference to the accompanying drawings, which illustrate an exemplary embodiment of a keyboard designed according to the invention. Show it
  • FIGURE 1 is an overall perspective view of the keyboard,
  • FIGURE 2 is a perspective staggered representation of bottom views of the keyboard components to be assembled according to the assembly sequence,
  • FIGURE 3 is a sectional view of the keyboard,
  • 4 shows a partial section of the keyboard in the area of a latching connection,
  • FIGURE 5 is a partial perspective view of the alignment and locking elements formed on a web of the front frame of the keyboard.

Die perspektivische Gesamtansicht FIGUR 1 zeigt eine alphanumerische Tastatur 1 mit einem Buchstaben-, einem Ziffern-, einem Funktions- und einem sog. Cursor-Tastenfeld 2, 3, 4 und 5. An einem Frontrahmen 6 sind Stege 7, 8 und 9 angeformt, die die einzelnen Tastenfelder 2, 3, 4 und 5 voneinander abgrenzen. Mit 10 ist ein zusammen mit dem Front­rahmen 6 das Gehäuse der Tastatur 1 bildendes Bodenteil be­zeichnet.The overall perspective view FIGURE 1 shows an alphanumeric keyboard 1 with a letter, a number, a function and a so-called cursor keypad 2, 3, 4 and 5. Bars 7, 8 and 9 are formed on a front frame 6, which separate the individual keypads 2, 3, 4 and 5 from each other. With 10 a together with the front frame 6, the housing of the keyboard 1 forming bottom part is designated.

Die FIGUR 2 zeigt in einer perspektivisch gestaffelten Anordnung die Rück- bzw. Untersichten der die Tastatur 1 bil­denden Bauteile, nämlich den Frontrahmen 6, das wannenförmig geformte Bodenteil 10 und eine die Tasten, von denen in FIGUR 1 eine mit 11 bezeichnet ist, tragende Leiterplatte 12. Der Voll­ständigkeit halber sei erwähnt, daß auf der Leiterplatte 12 beidseitig sich kreuzende, nicht näher bezeichnete Leiterbahnen aufgebracht sind, die an den Kreuzungsstellen zusammen mit je­weils einer Bohrung in der Leiterplatte Induktionsspulen bilden. D. h. bei dem gewählten Ausführungsbeispiel erfolgt die Signal­gabe induktiv.FIGURE 2 shows, in a perspective staggered arrangement, the rear and bottom views of the components forming the keyboard 1, namely the front frame 6, the trough-shaped bottom part 10 and a printed circuit board carrying the keys, of which a FIGURE 1 denotes 11 12. For the sake of completeness, it should be mentioned that on the printed circuit board 12, on both sides crossing, unspecified conductor tracks are applied, which form induction coils at the crossing points together with a hole in the printed circuit board. I.e. in the selected embodiment, the signal is given inductively.

Wie aus der FIGUR 2 ersichtlich ist, sind die einzelnen, nicht näher bezeichneten Schenkel des Frontrahmens 6 sowie die Stege 7, 8 und 9 nicht zuletzt aus spritzgußtechnischen Gründen U-förmig profiliert, so daß eine umlaufende äußere Wand 13 und innere Wandpartien, von denen eine mit 14 bezeichnet ist, gebildet sind. Die inneren Wandpartien 14 der Stege 7, 8 und 9 und der Schenkel des Frontrahmens 6 bilden die Auflage für die Leiterplatte 12, wobei vorzugsweise die Stirnflächen der Wandpartien 14 nicht in ein und derselben Ebene liegend ausgebildet sind und somit eine punkt- bzw. abschnittsweise Auflage der Leiterplatte 12 erzielt wird.As can be seen from FIGURE 2, the individual, unspecified legs of the front frame 6 and the webs 7, 8 and 9 are profiled U-shaped, not least for injection molding reasons, so that a peripheral outer wall 13 and inner wall parts, of which one designated by 14 are formed. The inner wall parts 14 of the webs 7, 8 and 9 and the leg of the front frame 6 form the support for the printed circuit board 12, the end faces of the wall parts 14 preferably not being formed in one and the same plane and thus a point or section support the circuit board 12 is achieved.

In einem im wesentlichen zentralen Bereich des Front­rahmens 6 sind an dem Steg 7 Zungen 15 und 16 ausgebildet, die Ausrichtelemente darstellen. Diese greifen beim Auflegen der Leiterplatte 12 durch eine in der Leiterplatte 12 befindliche Öffnung 17 hindurch und bewirken bezüglich der größeren Dimen­sion der Tastatur 1 ein genaues, gegenseitiges Positionieren von Leiterplatte 12 und Frontrahmen 6. Ein ebenfalls am Steg 7 angeformter Rasthaken 18 bildet zusammen mit einer quer zum Steg 7 ausgebildeten Rippe 19 ein weiteres Ausrichtelement, welches zusammen mit einem in der Leiterplatte 12 vorgesehenen Langloch 20 ein genaues Fixieren von Frontrahmen 6 und Leiterplatte 12 ausschließlich in der kürzeren Dimension der Tastatur 1 bewirkt. Da die Öffnung 17 ebenfalls als Langloch, und zwar in Richtung der kurzen Dimension ausgebildet ist, sind vorzugsweise symmetrisch zur Öffnung 17 den Ausricht- und Rast­elementen 18, 19 und dem Langloch 20 entsprechende weitere Ausricht- und Rastelemente und ein Langloch vorgesehen. Die Ausbildung der Ausricht- und Rastelemente geht im einzelnen besser aus FIGUR 5 hervor. Die Rippe 19 verbindet, wie FIGUR 5 zeigt, die Wände 14 des Steges 7 und dient somit zusätzlich als Stabilisierung. Die strichpunktiert eingezeichneten Linien L1 und L2 symbolisieren die Lage der Unterkante der Langlöcher 17 und 20 in der Leiterplatte 12, wenn diese dem betreffenden Frontrahmen zugeordnet ist.In an essentially central region of the front frame 6, tongues 15 and 16 are formed on the web 7, which represent alignment elements. These engage when placing the circuit board 12 through an opening 17 in the circuit board 12 and, with respect to the larger dimension of the keyboard 1, bring about an exact, mutual positioning of the circuit board 12 and the front frame 6. A latching hook 18 also formed on the web 7 forms together with one Rib 19 formed transversely to the web 7, a further alignment element which, together with an elongated hole 20 provided in the printed circuit board 12, brings about an exact fixing of the front frame 6 and printed circuit board 12 exclusively in the shorter dimension of the keyboard 1. Since the opening 17 is also an elongated hole, specifically in the direction of the short dimension, further alignment and locking elements and an elongated hole are preferably provided symmetrically to the opening 17, the alignment and locking elements 18, 19 and the elongated hole 20. The formation of the alignment and locking elements can be seen better in FIGURE 5. The rib 19 connects, as FIGURE 5 shows, the walls 14 of the web 7 and thus also serves as a stabilization. The dash-dotted lines L1 and L2 symbolize the position of the lower edge of the elongated holes 17 and 20 in the printed circuit board 12 when it is assigned to the relevant front frame.

Im Bodenteil 10 sind Taschen 21 ausgeformt, in die die Rasthaken 18 eingreifen. Die Öffnung 22 ist den Zungen 15 und 16 zugeordnet, so daß, da die Ausrichtelemente 18, 19 derart ausgebildet sind, daß sie auch in die Taschen 21 eingreifen, eine gegenseitige Positionierung des Bodenteils 10 und des Frontrahmens 6 auf einer durch den Steg 7 vorgegebenen Linie erfolgt. Mit 23 und 24 sind zwei von drei an dem Bodenteil 10 angeformte Rasthaken bezeichnet, die beim Zusammenfügen des Ge­häuses mit Öffnungen 25 und 26 in den Wandpartien 14 des Frontrahmens 6 in Eingriff gehen. Dabei ist für sämtliche Rastverbindungen in Längsrichtung der Tastatur 1 seitlich ausreichend Freiraum vorgesehen. Der Vollständigkeit halber sei erwähnt, daß im Bodenteil 10 der Neigungsverstellung der Tastatur 1 dienende Stützen 27, denen jeweils eine Griffmulde 28 zugeordnet ist, schwenkbar gelagert sind. Ferner ist im Bodenteil 10 eine Ausbuchtung 29 ausgeformt, über die der Tastatur 1, falls erforderlich, Zusatzaggregate zugeordnet werden können.Pockets 21 are formed in the bottom part 10, into which the latching hooks 18 engage. The opening 22 is assigned to the tongues 15 and 16, so that since the alignment elements 18, 19 are designed such that they also engage in the pockets 21, the bottom part 10 and the front frame 6 are positioned relative to one another on one of the webs 7 Line is done. 23 and 24 designate two of three locking hooks formed on the base part 10, which engage in openings 25 and 26 in the wall parts 14 of the front frame 6 when the housing is joined together. Sufficient free space is provided on the side for all latching connections in the longitudinal direction of the keyboard 1. For the sake of completeness, it should be mentioned that supports 27, which each have a recessed grip 28 assigned to them, are pivotably mounted in the base part 10 of the inclination adjustment of the keyboard 1. Furthermore, a bulge 29 is formed in the base part 10, via which the keyboard 1, if necessary, additional units can be assigned.

Aus dem Schnittbild FIGUR 3 ist ersichtlich, daß im Bodenteil 10 Rippen 30 ausgebildet sind, auf denen, wenn die Gehäusebauteile 6, 10 miteinander verrastet sind, die Lei­terplatte 12 aufliegt und daß die Leiterplatte 12 lediglich zwischen den Wandpartien 14 des Frontrahmens 6 und den Rippen 30 festgehalten wird bzw. gelagert ist. Ferner zeigt FIGUR 3, daß der Frontrahmen 6 das wannenförmig ausgebildete Bodenteil 10 mit allseitigem Abstand umgreift. Die Tasten 11 sind unmittelbar auf der Leiterplatte 12 befestigt, d. h. der jeweilige Tastensockel 31 ist mit der Leiterplatte 12 bei­spielsweise verrastet, und der Tastenkopf 32 ist in an sich bekannter Weise mittels einer geeigneten Säulenführung gefedert auf dem Tastensockel gelagert. Das Schnittbild FIGUR 4 macht nochmals die integrierte Bauweise der am Steg 7 ausgebildeten, der Öffnung 20 in der Leiterplatte 12 und der Tasche 21 im Bodenteil 10 zugeordneten Ausricht- und Rastelemente 18, 19 deutlich.From the sectional view FIGURE 3 it can be seen that 10 ribs 30 are formed in the bottom part, on which, when the housing components 6, 10 are locked together, the printed circuit board 12 rests and that the printed circuit board 12 only between the wall parts 14 of the front frame 6 and the ribs 30 is held or is stored. FIGURE 3 also shows that the front frame 6 engages around the trough-shaped bottom part 10 with a spacing on all sides. The keys are 11 directly attached to the printed circuit board 12, ie the respective key base 31 is latched to the printed circuit board 12, for example, and the key head 32 is spring-mounted on the key base in a manner known per se by means of a suitable column guide. The sectional view FIGURE 4 again shows the integrated construction of the alignment and locking elements 18, 19 formed on the web 7 and assigned to the opening 20 in the printed circuit board 12 and the pocket 21 in the base part 10.

Claims (7)

1. Tastatur mit einer Tasten tragenden Leiterplatte und einem Gehäuse,
dadurch gekennzeichnet,
daß das Gehäuse aus einem Frontrahmen (6) und einem Bodenteil (10) besteht,
daß an dem Frontrahmen (6) und dem Bodenteil (10) einander zugeordnete Rastelemente (18/21 und 23/25, 24/26) ausgeformt sind und
daß Frontrahmen (6) und Bodenteil (10) derart ausgebildet sind, daß durch Zusammenfügen von Frontrahmen (6) und Bodenteil (10) und Ineingriffgehen der Rastelemente (18/21 und 23/25, 24/26) die zwischenliegende Leiterplatte (12) im wesentlichen spielfrei gehaltert ist.1. keyboard with a key-carrying circuit board and a housing,
characterized,
that the housing consists of a front frame (6) and a bottom part (10),
that on the front frame (6) and the bottom part (10) associated locking elements (18/21 and 23/25, 24/26) are formed and
that the front frame (6) and base part (10) are designed such that by joining the front frame (6) and base part (10) and engaging the locking elements (18/21 and 23/25, 24/26) the intermediate circuit board (12) is held essentially free of play. 2. Tastatur nach Anspruch 1,
dadurch gekennzeichnet,
daß an dem Frontrahmen (6) Ausrichtelemente (15/16, 18/19) ausgebildet sind und
daß die Leiterplatte (12) mit den Ausrichtelementen (15/16, 18/19) zugeordneten Öffnungen (17, 20) versehen ist.2. Keyboard according to claim 1,
characterized,
that on the front frame (6) alignment elements (15/16, 18/19) are formed and
that the circuit board (12) is provided with the alignment elements (15/16, 18/19) associated with openings (17, 20). 3. Tastatur nach Anspruch 1,
dadurch gekennzeichnet,
daß das Bodenteil (10) wannenartig geformt ist und daß der Frontrahmen (6) den Rand des Bodenteils mit allseitigem Abstand übergreift.3. Keyboard according to claim 1,
characterized,
that the base part (10) is trough-shaped and that the front frame (6) engages over the edge of the base part with all-round spacing. 4. Tastatur nach Anspruch 1,
dadurch gekennzeichnet,
daß an wenigstens einem der die Tastatur (1) in Tastenfelder (2, 3, 4, 5) teilenden Stege (7, 8, 9) des Frontrahmens (6) Rasthaken (18) angeformt sind.4. Keyboard according to claim 1,
characterized,
that locking hooks (18) are integrally formed on at least one of the webs (7, 8, 9) of the front frame (6) dividing the keyboard (1) into key fields (2, 3, 4, 5). 5. Tastatur nach Anspruch 1,
dadurch gekennzeichnet,
daß am Bodenteil (10) Rasthaken (23, 24) ausgebildet sind derart, daß sie entgegengesetzt den am Frontrahmen (6) ausgebildeten Rasthaken (18) wirksam sind.5. Keyboard according to claim 1,
characterized,
that locking hooks (23, 24) are formed on the bottom part (10) in such a way that they are effective in the opposite direction to the locking hooks (18) formed on the front frame (6). 6. Tastatur nach Anspruch 4,
dadurch gekennzeichnet,
daß die am Frontrahmen (6) ausgebildeten Rasthaken (18) in ihrem Fußbereich als Ausrichtelemente ausgebildet sind.6. Keyboard according to claim 4,
characterized,
that the locking hooks (18) formed on the front frame (6) are designed as alignment elements in their foot region. 7. Tastatur nach Anspruch 1,
dadurch gekennzeichnet,
daß die Leiterplatte (12) zwischen im Bodenteil (10) ausgebildeten Rippen (30) und tiefgezogenen Wandpartien (14) des Frontrahmens (6) gehaltert ist.7. Keyboard according to claim 1,
characterized,
that the circuit board (12) between the ribs (30) formed in the bottom part (10) and deep-drawn wall parts (14) of the front frame (6) is held.
EP89111945A 1988-08-12 1989-06-30 Keyboard Expired - Lifetime EP0354340B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3827430 1988-08-12
DE8810271U DE8810271U1 (en) 1988-08-12 1988-08-12
DE3827430A DE3827430C2 (en) 1988-08-12 1988-08-12 keyboard

Publications (3)

Publication Number Publication Date
EP0354340A2 true EP0354340A2 (en) 1990-02-14
EP0354340A3 EP0354340A3 (en) 1991-05-15
EP0354340B1 EP0354340B1 (en) 1995-03-08

Family

ID=25871064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111945A Expired - Lifetime EP0354340B1 (en) 1988-08-12 1989-06-30 Keyboard

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US (1) US5001307A (en)
EP (1) EP0354340B1 (en)
DE (2) DE3827430C2 (en)

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JPH04169917A (en) * 1990-05-07 1992-06-17 Toshiba Corp Portable electronic apparatus
DE4029232A1 (en) * 1990-09-14 1992-03-19 Vedder Gmbh Geb Connection plate for installation switches, plugs, etc. - provides stamped sheet metal conductor paths for connecting similar electrical terminals to one another
DE9113293U1 (en) * 1991-10-25 1992-11-19 Cherry Mikroschalter Gmbh, 8572 Auerbach, De
GB2272405B (en) * 1992-11-12 1995-12-06 Rockwell International Corp Control console for a telephone system
US5428502A (en) * 1993-12-01 1995-06-27 Chicony Electronics Co., Ltd. Keyboard frame assembly mounting hardware having hooks, bridge strips, and locating stub rods
US5486058A (en) * 1994-08-09 1996-01-23 Allen; Donald E. Continuous touch keyboard
TW413781B (en) * 1998-06-26 2000-12-01 Acer Peripherals Inc Push-button keyboard capable of being installed with strengthened plates having different thickness
DE20110507U1 (en) * 2001-06-27 2002-09-05 Grote & Hartmann contacting
US20030201915A1 (en) * 2002-04-24 2003-10-30 Anderson Charles S. Computer keyboard
TW200928672A (en) * 2007-12-21 2009-07-01 Asustek Comp Inc Keyboard module and electronic device having the same
US9640346B2 (en) * 2015-09-11 2017-05-02 Dongguan Zen-tech Electronic Technology Co., Ltd. Keyboard

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EP0158795A2 (en) * 1984-04-03 1985-10-23 Siemens Nixdorf Informationssysteme Aktiengesellschaft Board for an electrical or electronic appliance
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DE3135139A1 (en) * 1981-09-04 1983-03-24 Siemens AG, 1000 Berlin und 8000 München Control unit having an input keyboard
EP0158795A2 (en) * 1984-04-03 1985-10-23 Siemens Nixdorf Informationssysteme Aktiengesellschaft Board for an electrical or electronic appliance
DE3512795C1 (en) * 1985-04-10 1986-10-23 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Keyboard, in particular for telecommunications switching systems
US4671688A (en) * 1985-10-02 1987-06-09 Honeywell Inc. Shielded keyboard
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DE8810271U1 (en) * 1988-08-12 1988-09-29 Mannesmann Kienzle Gmbh, 7730 Villingen-Schwenningen, De

Also Published As

Publication number Publication date
US5001307A (en) 1991-03-19
EP0354340A3 (en) 1991-05-15
EP0354340B1 (en) 1995-03-08
DE3827430C1 (en) 1989-10-05
DE3827430C2 (en) 1996-02-08
DE8810271U1 (en) 1988-09-29

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