DE8017115U1 - Keyboard, e.g. for office machines - Google Patents

Description

TRIUMPH WERKE NUREMBERG

Aktiengesellschaft χ Further Straße 212, 8500 Nürnberg 80

EP / Li / Hi / 2157 August 25, 1980

Keyboard _L _z _i _B _i _for_office_machines

'5 The object of the innovation is a keyboard that consists of a

There is a base body carrying contacts and a cover film.

- Such keyboards are especially used in office machines

also required to control work processes in machines, vehicles, etc. For this purpose, there are contact elements in the so-called base body provided, for example in the form of foils,

ι Ribbons etc. are arranged and respond to pressure. For loading

j agreed devices, e.g. B. Calculator, it is sufficient if

I the keystroke is only a few tenths of a millimeter. At

I their devices, such as B. typewriters, would the operator

|. user have noticeable key depth, as this is the

I feel much more secure during operation. at

I Membrane keyboards or similarly constructed basic bodies with

I contacts a key depth of approx. 4 mm cannot be reached.

I The innovation is based on the task of creating a keyboard

j> fen, which has the advantages of the well-known membrane keyboard,

ί at the same time, however, the operating requirements with regard to

; pressure and key travel is fair. A

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Arrangement according to the characterizing part of claim 1 in an excellent manner. According to the features of claim 2 can the desired effect can be enhanced. The inventive arrangement also has the advantage that easily another cover sheet can be used, the z. B. has other key symbols. Thus, while maintaining the the same base body a versatile use is conceivable. The drawings illustrate an embodiment of the innovation in a schematic representation. It shows:

Figure 1 is a diagrammatic representation of an innovation according to the invention Keyboard, expanded;

Figure 2 shows a cross section through a key in the rest position and

Figure 3 shows the same cross section in the actuated position.

With 1 sin basic body is designated, in soft for each key suitable contact elements are provided. This can be crosswise arranged contact strips, which by pressing together Give contact. But they can also be constructed in the manner of membrane keyboards. With 2 are the areas denotes on which pressure is to be exerted in order to establish contact.

-A-

Above the keyboard, a film 3 is arranged in which individual buttons 4 are molded. These keys 4 have lateral webs 5 which merge into a horizontal surface 6. In order to give the operator a secure grip, the keys 4 are equipped with recesses 7. A finger can be inserted into these indentations. By means of the base bars 8, which lie on the plane of the surface 3, the individual keys are supported on the base body 1. The slide 3 can be in her Edge area z. B. be connected to the base body 1 by welding or gluing.

It is useful if the keys 4 are made thinner at certain points than the other parts of the film. So z. B. the webs 5 can be very thin. On the one hand, this results in better elasticity and, on the other hand, if a Pressure is exerted on the button, thereby achieving a possibly desired snap effect.

A wart 9 can be provided at the deepest point of each depression 7. This has the advantage that an increased surface pressure is exerted on the top layer of the base body 1 will. Reliable contact is thereby achieved. The wart 9 is not absolutely necessary, however.

As can be seen from FIG. 3, when the button 4 is pressed, it is in its webs 5, its horizontal surface 6 and the recess 7 is deformed so that the protrusion 9 presses on the top layer of the base body 1 and thus the corresponding contact provided in the base body and closes it. at

appropriate choice of the material from which the film 3 is made, after the release of a button 4 this return to their basic position without the need for separate spring means. The elasticity and, in particular, the dimensional stability of the material are sufficient to achieve this to achieve with certainty. The height of the webs 5 and the recess 7 of a key 4 determine the key depth up to Making contact. It is easy to see that this key depth can be predetermined if the film is designed accordingly can. For typewriters, for. B. a key depth desired, which is about 3 to 4 mm. For other devices, z. B. calculators, a key depth of less than 1 mm may be desirable. This can also be easily achieved with an appropriate configuration of the film 3.

It is particularly advantageous that the film 3 in a simple way z. B. in the deep drawing process can be produced. she is thus an extremely inexpensive component, which, however, fully fulfills its function. It is also possible to use the individual To provide keys with the key symbols assigned to them.

Claims (4)

TRIUMPH WERKE NÜRNBERG Aktiengesellschaft Further Straße 212, 8500 Nürnberg 80 EP / Li / Hi / 2157 August 25, 1980 Claims for protection 1. Keyboard, e.g. B. for office machines, consisting of one that Base body carrying contacts and a cover film, characterized in that the cover film (3) is provided with elevations (5) and depressions (7) simulating the keys (4), with one depression (7) when actuated in such a way against the base body (1) that a point-like contact between the recess (7) and Base body (1) is created. 2. Keyboard according to claim 1, characterized in that that the wall thickness of the cover film (3) at preferred points (5) is thinner than at the rest Digits (6,7,8). 3. Keyboard according to claims 1 and 2, characterized in that on the with the base body (1) cooperating recess (7) a wart (9) is provided. 4. Keyboard according to Claims 1 and 2, characterized in that the push-through path of a key (4) is approximately 4 mm. 1 & 4 »« * «■ * ■ *» 4 »ι ι ti ι «4 · I JT *« * M fi t> t H * * IiI Ht »ff