CH632112A5

CH632112A5 - Push-button keypad and use of the same as a dialling keypad of a public telephone station

Info

Publication number: CH632112A5
Application number: CH741078A
Authority: CH
Inventors: Georges Dombre
Original assignee: Sodeco Compteurs De Geneve
Priority date: 1978-07-07
Filing date: 1978-07-07
Publication date: 1982-09-15
Also published as: FR2430658A1; FR2430658B3

Description

Der Erfindung liegt die Aufgabe zugrunde, eine vor Wanda-55 Nocken 21 (Fig. 2) angeformt. Jeder Nocken 21 weist eine mit len weitgehend geschützte Druckknopf-T astatur zur Betäti- einer 45°-Ansenkung 22 versehene Gleitbahn 23 auf. Im Bewegung von Schaltkontakten zu schaffen. Die Erfindung ist im gungsbereich der Ansenkung 22 ist in eine Nut 24 des Kunst-Patentanspruch 1 gekennzeichnet. stoffteiles 6 ein Federdraht 25 eingelegt. Beim Betätigen eines The invention has for its object a molded in front of Wanda-55 cam 21 (Fig. 2). Each cam 21 has a largely protected push-button keypad for actuating a 45 ° depression 22 slideway 23. To create in the movement of switch contacts. The invention is in the supply area of the countersink 22 is characterized in a groove 24 of the art claim 1. fabric part 6 a spring wire 25 inserted. When pressing one

Bei Verwendung in einer öffentlichen Fernsprechstation ist Druckknopfes 3 läuft die Ansenkung 22 am Federdraht 25 an es von Vorteil, die Tastatur direkt im panzerartigen Gehäuse 60 und muss diesen ausbiegen, um anschliessend mit geringerem einzubauen, während die zu betätigenden Schaltelemente Widerstand an der Gleitbahn 23 entlang zu gleiten. Die kurzzei- When used in a public telephone station, the push button 3, the countersink 22 on the spring wire 25 runs to advantage, the keyboard directly in the armor-like housing 60 and has to bend it out in order to subsequently install it with less, while the switching elements to be actuated have resistance along the slideway 23 to slide. The brief

wohlgeschützt im Innern der Fernsprechstation angeordnet tig aufzuwendende und wieder steil abklingende zusätzliche sind. Bei Unterhaltsarbeiten können dann die Schaltelemente Druckkraft bewirkt ein die Kontaktgabe sicherstellendes Kipp-auch bei abgehobenem Gehäuse direkt mit dem Finger betätigt verhalten. Der gleiche Federdraht 25 kann mehreren Druckwerden. 65 knöpfen zugeordnet sein. Well protected inside the telephone station are additional and steeply decaying. During maintenance work, the switching elements can then cause a tilting force to ensure contact, even when the housing is lifted, and can be operated directly with the finger. The same spring wire 25 can be pressed several times. 65 buttons can be assigned.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung Die Druckknöpfe 3 liegen am Ende ihres Betätigungsweges anhand der Zeichnungen näher erläutert. mit ihrer Stirnseite 19 auf der massiven Platte 5 auf. In dieser An exemplary embodiment of the invention is described below. The push buttons 3 are explained in more detail at the end of their actuation path with reference to the drawings. with its end face 19 on the solid plate 5. In this

Es zeigen die Fig. 1 und 2 je einen zueinander senkrecht lie- Stellung berühren sich die einzelnen Windungen der Feder 10 1 and 2 each show a position perpendicular to one another, the individual turns of the spring 10 touch

noch nicht Die Feder bestimmt die auf die Schalteinrichtung wirkende maximale Druckkraft, die selbstverständlich grösser ist als die zur Betätigung der Schnappscheiben 15 nötige Kraft. not yet The spring determines the maximum pressure force acting on the switching device, which is of course greater than the force required to actuate the snap disks 15.

Auch bei böswilliger Krafteinwirkung auf die Druckknöpfe 3, beispielsweise durch hammerartige Schläge, können auf die 5 Schnappscheiben 15 keine unzulässigen Kräfte ausgeübt wer- Even in the event of malicious force acting on the push buttons 3, for example by hammer-like blows, no unacceptable forces can be exerted on the 5 snap disks 15

632112 632112

den, denn solche überträgt die Stirnseite 19 der Druckknöpfe 3 auf die massive Platte 5. Aus dem gleichen Grund ist es zweckmässig, die Druckknöpfe 3 aus Metall herzustellen. Zusammen mit der als Teil eines Stahlgehäuses ausgeführten Deckplatte 1 ergibt sich ein weitgehend wandalensicherer Aufbau. the, because such transfers the end face 19 of the push buttons 3 to the solid plate 5. For the same reason, it is expedient to manufacture the push buttons 3 from metal. Together with the cover plate 1, which is designed as part of a steel housing, there is a largely wall-safe construction.

1 Blatt Zeichnungen 1 sheet of drawings

Claims

632 112 2

PATENT CLAIMS through two buttons each in a public

1. push-button keyboard for actuating Schaltelemen- Telefonstation built-in push-button keyboard, from ten a switching device with several push buttons, each of which the button on the right is depressed. The actuate a cover plate penetrate and in the rest position with depending switching elements are only indicated in Fig. 1. For an integrally formed shoulder on each inner contour below which 5 identical parts, the same signs are in effect in both figures for each spring and one with the cover flap.

plate connected plate, which the path of the push buttons at A cover plate 1 is also part of the remote

their actuation by resting their end face on the plate speaking station covering housing made of high-strength rust-limited, characterized in that the plate (5) on the cherem steel sheet. It is pierced in openings 2 by push buttons on the inside of the cover plate (1) with solid connecting elements 3. On the inside of the cover plate 1 are fastened as elements (4, 7) and that massive stud bolts 4 are butt-fitted between the cover plate (1) and connecting elements, and a plastic part (6) is inserted into the plate (5), which welds. These penetrate with a thread one of the plate (5) in a bore (12) of a captive cover plate 1 parallel plate 5 made of steel. A plastic part 6 is tappet (11) for actuating the switching device (14, 15, 16, 17, as an intermediate layer between the cover plate 1 and the plate 5 18) is penetrated, and the switching device on which the 15 is present. The whole is located by nuts 7 together befe cover plate (1) facing away from the plate (5), and stigt. The plastic part 6 has the same openings 2 that between each plunger (11) and its associated as the cover plate 1, but also has recesses push button (3) made of metal which the push button in its gene 8, on the inner contours of which two openings 2 spring (10) holding rest position is arranged. penetrating push buttons 3 in their rest position with each

2. push-button keyboard according to claim 1, characterized 20 of a molded shoulder 9 under the action of a spring 10, characterized in that each push button (3) are at least one in line.

Direction of actuation beyond its end face (19) against the same axis as the push buttons 3, penetrates the plate 5 per plate (5) and, when actuated, the plate (5) into a plunger 11 in a bore 12. The plunger 11 of a bore (20) penetrating cam (21) is formed of a circular cross-section and has on the art, which each have a countersink (22) provided with a countersink (22) slider 25 fabric part 6 side of the plate 5 a slightly large (23) for bending a a groove (24) of the plastic part ren diameter than the bore 12. As a result, the plunger (6) has inserted spring wire (25). 11 between the plate 5 and the cover plate 1 captive

3. Use of the push-button keyboard according to the patent, that is, the plunger 11, the plate 5 can penetrate a saying 2 as a dialing keypad of a public telephone station, but not completely leave the plate, the switching device to be actuated (15, 16 , 17,18) 30 Each plunger 11 penetrates with its larger diameter protected inside the telephone station and sers, additionally centering, in a blind hole 13 in the keyboard can be actuated, the cover plate (1) of the push button 3 . The spring 10 is supported between the keyboard and is at the same time part of a steel housing covering the base station of the blind bore 13 and the end face of the plunger 11. off, holds the push button 3 in its rest position, that is, with

35 of his shoulder 9 on the plastic part 6, and pushes the plunger 11 with its outer end 14 against a switching device described below. In the present example, domed snap disks 15 serve as switching elements, which are arranged behind a flexible cover 16 in an insulating part 17. The invention starts with a push button 40. When snapping due to a pressure keyboard according to the preamble of claim 1. of the plunger 11, the associated snap spring 15 creates a

For the operation of pocket calculators there are push-button electrical connections between contact points 18, which are known in the Iso keyboards, the keys of which are arranged when the switching part 17 is depressed. Actuate the entire switching device 15, 16, contacts (US Pat. No. 4,056,700). 17, 18 is thus part of the electrical circuit inside the

In telephone stations there is a tendency to arrange the known 45 telephone stations in a well-protected manner and to actuate them via the dials for mechanical generation in different lengths.

electrical pulse packages by electronic means to ensure that when the push buttons 3

replace and the desired pulse packets through which the actuator is always run all the way and the contact points are preselected using the appropriate buttons. In public long-distance contacts, there is also a need to increase the dialing power 50 at the beginning of the path, but then to inherit it again with something more robust, because they are one of the lower additional forces. For this purpose, each button 3, which is the least able to protect against malicious damage, has at least one in the actuating direction via its parts. Known push-button keyboards are, however, protruding for an end face 19 against the plate 5 and are not robust enough in such an application. Actuate the plate 5 in a bore 20 penetrating