WO2012113003A1

WO2012113003A1 - Key device for an electronic key instrument

Info

Publication number: WO2012113003A1
Application number: PCT/AT2012/000038
Authority: WO
Inventors: Friedrich LACHNIT
Original assignee: Fl Keys E.U.
Priority date: 2011-02-21
Filing date: 2012-02-21
Publication date: 2012-08-30
Also published as: AT510839B1; AT510839A4

Abstract

A key device (10) for an electronic key instrument, such as a digital piano or keyboard, having at least one key (11) swivel-mounted on a frame (13) and a weight-portion lever (15), which is associated with said key (11), is swivel-mounted on the frame (13) and is swivelled by the key (11) when said key (11) is pressed, and also having position- and speed-measuring means (28') for the weight-portion lever (15), in order to determine the initiation and volume of a sound, wherein the measuring means (28') are produced with contactlessly operating sensor means (28) for capturing positions and the speed and also the direction of movement of the weight-portion lever (15) when the key (11) is pressed.

Description

Key device for an electronic keyboard instrument

The invention relates to a key device for an electronic keyboard instrument, such as a digital piano or keyboard, with at least one pivotally mounted on a frame key and one of this key associated with the frame pivotally gela ^¬ siege weight part lever, the pressing of the key through this Button is swiveled, as well as with position and

Part weight lever speed measuring means for determining sound triggering and volume.

With a classical piano, the respective desired tone in terms tripping, duration and volume results when playing through a corresponding keystroke that is more or less be ^¬ reigns of piano players after correspondingly long practice. With appropriate practice, the pianist knows, at least intuitively, when and how loud the sound must come when a key is struck in a certain way, and in many years of training, the corresponding motor processes are optimized.

From US 5,291,011 A or JP 2001-222 282 A, it is also known to detect the hammers, which are impacted by a mechanism when depressing keys of such pianos, which strike against an associated piano side, but which do so by means of photo sensors the tone generation has no influence.

In an electronic keyboard instrument, in particular a digital piano or keyboard, there are no more strings to be attached, but there are sound data (sound samples) stored in computer chips, which are retrieved with an electronic control command. The keyboards for keyboards and the like electronic keyboard instruments have essentially developed starting from the Ak ^¬ kordeonbau and lately also from the electric organ building herkom ^¬ mend where the keys are usually used only at the beginning and end a sound generator. In order to improve the feel of such keyboards, attempts were also made to retrieve sounds (sounds) velocity critical. Using your fingers, with the help of a keyboard, to strike the right tone at the right volume and at the right time requires not only the conventional piano or concert grand piano for years of practice, but also in the electronic keyboard instruments; Here too is a year-long

Feedback between brain, fingers and sound production is required, with the problem that usually due to the other type of sound production, a very different attack technique compared to that in a conventional piano, as necessary. Therefore, relatively complex mechanical simulations of key devices have been developed to mimic the feel of a piano mechanic; but their outcomes were never really satisfied ^¬ stellend. Above all, the timing, namely the timing of the sound triggering, almost never proved authentic, apart from the different feel due to the nature of the keys, the movable masses, the intended position of the key sensors, etc.

For most keyboards, the contacts for triggering the sound (s) are below the keys. Triggering occurs, for example, after approximately half of the keyway. In order to simulate an attack dynamics - albeit in the simplest form - are provided in accordance with the prior art, two offset in height relative to each other switching contacts, which are mounted on a circuit board and attached to the underside of the respective button "plunger" See, for example, EP 0 727 766 or US 2006/0254406. Due to the difference in the timing of the operation of the two offset contacts, the speed of the key movement can be inferred, which is considered a measure of the desired volume Contacts are relatively inaccurate, non-contact optical sensors have also been proposed, see, for example, JP 10-026983 Another such older proposal is disclosed in US 5,231,283, which shows a mechanical-optical sensor with a lever pivoted from the bottom of the key. the one with a corresponding section with ei ^¬ a light sensor directly below the respective button

interacts.

According to CN 101320558 A (see also US 5 552 561 A and JP 03-107899 A) has been proposed more recently, electric rubber block contacts instead of on the underside of the button on the bottom (or top) of a ^pivot of the key ^¬ game weight lever to install. However, there are the ^¬ se contacts adjacent to the pivot bearing for the lever, so that in the region of the contacts, the movement stroke is relatively low, similar to the case of the contacts and sensors directly to the bottom of the keys. Characterized positions on specific track ^¬ speeds can be detected only relatively inaccurate in a key operation, and studies have shown that on the same keyboard different keys which are operated at the same speed, nevertheless notes

effect different volumes.

This disadvantage is in principle also given in the key device according to US 5 062 342 A, where a mechanism with two levers is provided for each key, of which a lever is moved by the respective key and then in turn actuates the other lever, which then against, in particular above lying, contacts proposes.

It is an object of the invention to remedy this situation and to avoid the disadvantages of the known keyboards or key devices as well as possible; In particular, it is an object of the invention to provide such a key device that allows the best possible approach to a keyboard of a concert grand piano when playing, so that the change from playing a piano to play a keyboard or digital piano equipped with this keyboard device is unproblematic for a player and him the feeling of playing is conveyed as on a Kon ^¬ zertflügel. Furthermore, the aim to achieve A possible ^¬ lichst cost formation of the key device, regardless of the perfect as possible simulation of playing on a conventional piano playing on this button device with a keyboard, etc.

To solve this problem, the invention provides a Tastenein ^¬ direction as stated above, which is inventively characterized in that the measuring means with non-contact sensor means for the detection of positions and the Speed as well as the direction of movement of the weight ^¬ part lever when pressing the button are formed.

In the present key device thus the weight part lever even non-contact sensor means are assigned to position as well as speed and

Direction of movement of the weight part lever, hereafter briefly lever to detect when playing a key. The non-contact sensor means which cooperate with the lever can thereby be provided relatively far away from the bearing point of the lever, that is, from the pivot bearing, and the lever can execute a strong pivotal movement in comparison to the key, whereby measurements are made possible with correspondingly large movement strokes so that the accuracy in detecting the positions and the speed of the lever can be substantially increased. In fact, when detecting the movements of the keys themselves, only a relatively small stroke is available, unlike a lever which, for example, has a multiple of the angle "stroke" of the key during its movement stroke. Furthermore, the accuracy is also ensured by the fact that contactless sensor means are provided, instead of the known rubber-springy touch contacts according to the prior art, so that much more accurately the positions, etc. can be detected when the lever of a key operation is first pivoted in one direction, while the Sound triggers, and then pivots back, the sound is then terminated. By appropriate adjustment of the non-contact sensor means while the time of sound release as well as the time of letting go or the sound termination are determined quite analogous to the corresponding times when playing on a conventional piano.

Theoretically, capacitive or inductive sensors could be provided in the present key device, but preferably the non-contact sensor means are formed with - preferably stationary - light barrier means. In particular, with regard to the speed detection, two adjacent optical sensors can be provided; Furthermore, it is favorable to provide as a light barrier means simply transmitted-light barrier means, if- Equally reflection light sensor means are conceivable.

The light barrier means are preferably associated with a plate-shaped part of the weight part lever, in particular a laced flag on the lever. For the speed detection, it is advantageous if the flag has two slots, so as to allow successive, similar signal edges.

The lever can be arranged as known per se under the associated key; but it is, for example, if the construction requires a particularly flat play area, but behind a higher structure is easily possible, quite conceivable that the lever is disposed above a remote from a player rear part of the button, which is hidden in the operating state of a housing part ,

Optionally, for example, in addition, for verification purposes, contactless speed sensor means may be provided on the underside of the key. These provided at the bottom of the button speed sensor means may also be formed by an optical sensor, preferably a reflex sensor, but it may also be provided for particularly accurate measurements, for example, to provide a transparent measuring strip, which is connected to the button with a scaling is provided, and which cooperates with a stationarily arranged optical sensor.

The invention will be further elucidated on the basis of preferred embodiments, to which, however, it should not be restricted, and with reference to the drawing.

In detail in the drawing:

1 is a schematic, partially sectioned view of the arrangement of a key with a play weight or weight ^¬ part lever in an electronic keyboard instrument, namely in particular a keyboard, which also schematically a Klaviaturrahmen is illustrated in section. 2 is a partial bottom view of an arrangement with several He ^¬ lever of Figure 1 in conjunction with a common circuit board.

Figure 3 is a partial view taken along arrow III in Figure 1 on an enlarged scale, the arrangement of a flag with two slots on a lever in the region of an angling thereof, in conjunction with a screw for adjusting the flag relative to the lever and with optical sensor means ..;

Fig. 4 is a view similar to Figure 1 is a position in which the key was pressed from the rest position shown in Figure 1 when playing down.

5 is a block diagram of a - known per se - electronic circuit for retrieving sound samples from an electronic memory when pressing the keys of the keyboard;

Fig. 6 in association with this block diagram, a diagram with signals as they are obtained when using the key device of Figures 1 to 4, with the double-slotted flag and the sensor means with two sensors.

Fig. 7 in a view, partially in section, similar to Figure 1 a key device with an upper-side, rear lever.

Figure 8 is a plan view of a part of the lever of the key device according to Fig 7, together with flags attached thereto and to ^¬ associated forked light barrier with two sensors..;

FIG. 9 shows the arrangement according to FIG. 7 in the position in which the key is pressed; FIG.

10 shows a further embodiment of a key device, again with a lever below the key, but in the rear key area, again showing the key in the rest position, similar to that in FIGS. 1 and 7;

Fig. 11 in a detailed plan view of a plate-shaped end part of the lever in association with optical sensor means in the form of Fork sensors;

FIG. 12 shows a view similar to FIG. 10 of the key device while the key is pressed; FIG.

Fig. 13 shows another embodiment of the key device similar to that of Fig. 10 but modified with respect to the arrangement of speed sensing means on the key bottom;

FIG. 14 is a view corresponding to FIG. 13 of the key device while the key is pressed; FIG.

15 shows a schematic partial view of a reflection light sensor provided in this embodiment according to FIGS. 13 and 14 as a speed sensor means on the underside of the key;

16 and 17 show another key device in views corresponding to FIGS. 1 and 4, in the rest position (FIG. 16) and secondly while the key is pressed (FIG. 17); and

FIGS. 18 and 19 show another embodiment of the present key device in the rest position (FIG. 18) or while the key is pressed (FIG. 19), in views corresponding to FIGS. 1 and 4.

In the following description, corresponding elements and components are denoted by the same reference numerals in the individual drawing figures.

With reference to FIGS. 1 to 6, a currently particularly preferred embodiment of the present key device 10 will be explained first. This embodiment of the

Button device 10 as well as all other embodiments can be used in any electronic keyboard instruments, namely keyboards, digital pianos, but also electronic organs, especially in such instruments with more than one manual. The general arrangement of the respective keyboard is known per se, so that a more detailed description can be omitted here. In Fig. 1 and 4, a key 11 of the key means 10 in a side view, partially in section, even in the rest ^¬ position (FIG. 1) and the other being pressed once in a with a force F (see Fig. Arrow) match position (Figure 4). In Fig. 1 and 4, the pivot bearing 12 for the key 11 is indicated only schematically, and this pivot bearing 12 may be formed in a conventional manner. The pivot bearing 12 is arranged on a keyboard frame 13, which is partially schematically illustrated in Fig. 1 and 4 in section.

Below the key 11 is a weight part lever 15, which is simply called lever 15 hereinafter and represents a game weight 14 to a pivot bearing 16 pivotally mounted on the frame 13. The lever 15 is designed as a double-armed lever, wherein the shorter lever arm 17 rests against the underside of the key 11, whereas the longer, angled lever arm 18 forms the egg ^¬ tual game weight 14. . When the button is pushed can be seen 11 as shown in Figure 4, the shorter lever arm 17 is pivoted counterclockwise as shown in Figure 4 down, and the longer lever arm 18 (likewise in counter ^¬ clockwise) thereby pivoted upwards. See also the

Arrows in Fig. 4 around the pivot bearing 16th

The lever 15 has with its longer lever arm 18 is an approximately rectangular bend 19; in the region of this bend 19, in the outer corner area, a screw adjusting member 20 is screwed for the A ^¬ position and fixing of a flag 21st

The flag 21 has, as is apparent in particular from the enlarged view in Fig. 3, two slots 22, 23 which cooperate with two (transmitted) sensors 24, 25, wel ^¬ che via a holder 26 attached to a circuit board 27 are. The two transmitted-light sensors 24, 25 together with the flag 21 or its slots 22, 23 non-contact sensor means 28 as measuring means 28 'for the detection of positions and movements or speeds of the lever 15 with its corner portion 19, if the associated Key 11 is pressed, s. Arrow F in Fig. 4. This will be explained below with reference to FIG. 6 in more detail. In FIGS. 1, 3 and 4, only one key 11 with associated lever 15 and associated non-contact sensor means 28 is shown as measuring means 28 'for the positions and speeds of the lever 15. Of course, such arrangements as shown in FIGS. 1, 3 and 4 are provided for all keys 11 of the keyboard instrument. The circuit board 27 may extend ^¬ over the entire length of the keyboard, but it may also be divided, for example according to octaves of the keyboard. From the bottom view of FIG. 2 it can be seen that the printed circuit board 27 is provided for a plurality of keys or more precisely levers 15, 15 ', 15'', etc., these levers 15, 15', 15 '' corresponding to the example in FIG 2 are associated with buttons 11 not shown in greater detail and each carrying a flag 21 with slots 22, 23 (see FIG. 3) which cooperate with optical sensor means, here transmitted light sensors 24, 25. As can be seen from FIG. 2, 21 sensor elements 29 (eg with a light transmitter, or with two light transmitters) and 30 (with two light receivers) are provided on both sides of the flag.

With the screw 20, the flag can in its longitudinal direction, as can be seen directly from Fig. 3, see. there also the double arrow, be adjusted exactly, so as to determine the positions for the sound of the respective tone. Such Feinj ustierung a flag 21 can, however, also erübri ^¬ conditions when the design and arrangement of the respective lever 15 and the fixed attachment of the flag 21 are sufficiently accurate and correspond to the desired positions for the input or Ausschal ^¬ th of the clay ; see. in this context also in ^¬ example, the figures 7 to 9, where a fixed flag 21 is mounted on the lever 15.

FIG. 5 very schematically illustrates a basically conventional electronic unit for an electronic keyboard instrument, eg a keyboard, equipped with a key device 10 according to, for example, FIGS. 1 to 4. Wesent ^¬ Licher component of this electronic unit is a central computer or processor, a CPU 31; this CPU 31 is a

Operating interface 32 assigned to various control functions, such as on / off or selection in the Sound reproduction, etc. to control. In addition, the CPU 31 is connected to the output of a logic module 33, for example in the form of an FPGA decoder (FPGA-field-programmable gateway array, freely programmable link field). This logic module 33, the signals of all non-contact sensor means 28 are supplied from all keys 11 of the keyboard of the instrument to entprechenden inputs; For the sake of simplicity, only the signal combination s1, s2 of a key 11, ie of its contactless sensor means 28 (see Figures 1 to 4), is shown here in conjunction with Figure 5 in Figure 6.

5, the output of the CPU 31 is further connected to a sound module 34, this sound module 34 holds the corresponding sound samples stored for the tones (sounds) to be retrieved and has a corresponding output circuit with an audio output 35 , are connected to the not further illustrated ^{loudspeaker ¬} .

The CPU 31 further has a MIDI (MIDI musical instrument digital interface) and USB-MIDI output 36, respectively.

In Fig. 6, individual phases XI (rest position), Y (key pressed) and X2 (renewed rest position) are illustrated. In between are special signal trains in areas A, B

illustrated.

According to FIG. 6, by way of example, a key 11 (FIG. 1) is in the rest position in phase XI. In this rest position, the signals sl of the sensor 24 and s2 of the sensor 25 are at "0", since the sensor means 28 are in the position blocked by the flag 21 (see FIG Movement direction are offset, and that moreover two slots 22, 23 are present in the flag 21, then when passing the flag 21 and thus the slots 22, 23 on the sensors 24, 25, if by pressing the key 11, the lever 15 is pivoted , A variety of signal evaluations are achieved, in particular the position (which is detected with the signal s2), the direction of movement (in combination with the Si ^¬ signal sl) and the speed of the flag 21 and thus the lever 15th Therefore, as shown in Fig. 6, when the lever 15 with the flag 21 moves from the home position (Fig. 1) to the right, the slots 22, 23 pass first through the sensor 24 and then the sensor 25 in that order each time the signal sl or s2 goes from "0" (blocked) to "1" (transmitted light). In between, the sensors 24 and 25 are again covered, with the signals sl, s2 going back to "0" in the short term This signal situation is illustrated in the region A in FIG. 6, where the numbers 1 to 5 in the phase A are the centers (Comparable "O-passes") of the edges of the signal s2 are indicated. In the case of the "O-passage" No. 1 of the signal s2, for example, the signal sl of the sensor 24 has already reached its maximum, that is to say a logical "1"; Similarly, in the further "O-passages" 2, 3, 4, 5 of the signal s2, time-shifted signal values, for example minima and maxima, are present in the signal sl, ie when the "on" (range A) is activated, the signal s2 passes the signal sl after.

Between the flanks no. 3 and no. 5, for example, the speed of the movement and thus the volume is determined.

From the fact that always first the signal sl rises from "0" to "1" and only after that the signal s2, is closed to the direction (direction "on" of the sound or the note).

In the phase Y, the key 11 is pressed for a certain period of time, and in this phase Y, both sensor signals sl, s2 are at "1", as can be seen from the diagram in FIG.

Thereafter, the button 11 is released, so that the fixed to the lever 15 flag 21 as shown in Figures 1 and 4 again moves to the left, so that the two slots 22, 23 again pass by the sensors 24, 25; unlike pressing the key 11, however, the slot 23 now first passes the sensor 25, but the light signal is previously concealed by the flag 21 in the short term. Accordingly, at the transition to the renewed rest position, phase X2, first the signal s2 goes to logical "0", then back to logical "1", back to logical "0" and back to logical "1" and then finally logic "0" .To offset time (corresponding to the distance between the sensors 24, 25), the signal sl on the release of the key 11 and thus when switching off the note the signal s2 after.

The duration T of the note is now determined, for example, between the edge no. 5 in the turn-on area A and the edge no. 2 'in the turn-off area B. Between the shut-off edge 4 'and the edge 2', the release time and thus the release speed is determined.

The key device 10 according to the embodiment of FIGS. 7 to 9 differs from the embodiment described with reference to FIGS. 1 to 6 primarily in that the lever 15 is not under the key 11, but in the rear, within a housing 40th concealed area above the Tas ^¬ te 11 is arranged. The lever 15 is again pivotable about a pivot bearing 16, but it is now as a one-armed lever, with a stop 41, which defines a short lever arm 17 relative to the pivot bearing 16 is formed. The long lever arm 18 in turn carries a flag 21, which is now firmly connected to the lever 15, and which has only a single slot 22. This flag 21 with the slot 22 in turn forms with a fork light barriers with two sensors 24, 25 (see Fig. 9) without touch working optical sensor means 28; These sensor means 28 are now so far compared with the embodiment of FIG. 1 to 6 simplified, just as he ^¬ thinks the flag 21 has only one slot 22, so that each sensor 24, 25 is covered twice by the flag 21 and released therebetween. The resulting therefrom Sensorsigna ^¬ le can be used as explained with reference to FIG. 6, again similar to determine the position for the start and end of the desired tone and, based on the measurement of the speed of the sound volume.

The optical sensors 24, 25 are attached to a - here in plan view (see Fig. 8) U-shaped holder 26 ', on the legs of the U, two sensors 24, 25 above the other.

In Fig. 7 and 9, for simplicity, the in Fig. 1, the second and 4, printed circuit board 27 omitted; Of course, however, in the embodiment of FIG. 7 to 9, a corresponding circuit board 27 may be present, to which the carrier 26 'for the optical sensors 24, 25 is attached. Alternatively, there may be an electrical signal connection between the sensor means ^¬ 28 and a separate, for example, mounted on a circuit board circuit.

FIGS. 10 to 12 in turn show an embodiment of the present key device 10 with a lever 15 below the key 11. Similar to the embodiment according to FIGS. 7 to 9, however, the lever 15 is not provided with a separate flag 21, but together with its rear flag-like, plate-shaped end part 15x forms a diaphragm for the non-contact optical sensor means 28, to which two Fork light barriers, with two sensors 24, 25 in superimposition belong. In this case, the end portion 15x of the lever 15 sequentially interrupts the light beam of the sensor 24 and then the sensor 25 to finally in the state with pressed key 11, see Fig. 12, both light beams to block. From the time starting with the blocking of the first sensor 24 to the blocking of the second sensor 25, it is possible to deduce the speed and thus the volume when the key 11 is actuated; as long as the two sensors 24, 25 are in the "0" state, ie as long as the light beam is interrupted at the two sensors 24, 25, the sound remains on, then first the light beam at the sensor 25 and, with the predetermined delay, Then, the light beam at the sensor 24 is released again when the key 11 is released and thus returns from its state shown in Fig. 12 in the resting state shown in Fig. 10. In this phase, the lever 15 moves from that shown in Fig. 12 Situation again in a pivoting movement about its bearing 16 now in a counterclockwise direction, ie with the end-side panel member 15x down and away from the sensors 24, 25th

Another difference from the previous embodiments is in the key device 10 according to FIG. 10 to 12 in that on the underside of the key 11, a measuring strip 42 is mounted with a grid line, which is provided with a simple Gabellicht- 43 cooperates to form non-contact speed sensor means 44; With these sensor means 44, however, it is of course also possible, with regard to the measuring strokes on the measuring strip 42, to determine the respective position of the key 11. The measuring strip 42 may be transparent, for example, in which case there is a transmitted light barrier 43; on the other hand it is

Of course, it is also conceivable to use an opaque measuring strip 42 and to let the sensor means 48 operate with reflected light. The optical part with light transmitter and receiver, so the actual sensor means 43 is similar to the previous versions stationary, here attached directly to the frame 13 and connected via lines not shown in detail with a printed circuit board or an electronic circuit for evaluating the signals.

The sensor means 44 can also, for example for inspection or for a coarse measurement to be provided, the result of the larger stroke of the end portion 15x of the lever 15 ge passed ^¬ greater precision of the sensor means is primarily 18th

The embodiment according to FIGS. 13 and 14 corresponds, as regards the (main) sensor means 28 to the end part 15x of the lever 15 as an aperture, to the embodiment according to FIGS. 10 to 12. Instead of the measuring strip 42 according to FIGS. 10 and 12 However, on the underside of the key 11 of the key device 10, a speed sensor means 44 with a reflex light sensor 45 is provided, which cooperates with a projection 46 on the key underside in order to detect the speed of the key 11. In Fig. 15 is an enlarged view of this reflected light sensor means 44 with a light emitter 47, e.g. an LED, and a light receiver 48, e.g. a photodiode or phototransistor.

In the embodiment according to FIGS. 16 and 17, various aspects of the preceding embodiments are realized. Thus, for example, at the bottom of the key 11 of the key device 10 shown again in the front region of the lever 15 is arranged, substantially similar to the embodiment of FIGS. 1 to 4, only with the difference that the flag 21 is merely a slot 22, comparable to the embodiment according to FIGS. 7 to 9. In addition, a reflex light sensor sensor means 44 as just described with reference to FIGS. 13 to 15 in the region of the underside of the key 11 is provided, which in particular with reference to FIG 15 is formed, so that a more detailed explanation is unnecessary.

The sensor means 28 with the light barriers 24 'and the flags 21 with the single slot 22 works like with reference to FIGS in principle. 7 to 9 described ver ^¬ parable contactless sensor means 28, so that can eliminate the need for newly description here. A difference can be seen only in that in the home or rest position shown in FIG. 16, the light beam of the forked light barriers 24 'is interrupted by the flag 21, and the light beam thereafter upon actuation of the key 11, see Fig. 17, first the slot

22 happened in the short term, after which he is briefly blocked again to then, while pressing the key 11, free to pass from the (not shown) transmitter to the receiver, similar to the first embodiment shown in FIG. 1 to 4. In contrast, in the Embodiment of FIG. 7 to 9, the light beam is not blocked even in the rest position, see Fig. 7, it is, however, only briefly blocked twice by the fork-shaped flag 21 and then released again when depressing the button 11, see Fig. 9.

In the embodiment of the key device 10 according to FIGS. 18 and 19, the arrangement of the game weight 14 or lever 15 in the rear key area above the key 11 again corresponds to the arrangement in the exemplary embodiment according to FIGS. 7 to 9, so that, also with regard to the here formed contactless sensor means 28, which are also formed analogous to Fig. 7 to 9, a repetition of the description may be unnecessary.

Unlike the embodiments just described with speed sensor means 44 on the underside of the Tas ^¬ te 11 18 and 19 an embodiment of such sensor means 44 with the aid of two offset forked light barriers 51, 52 is provided in the embodiment of FIG. these two fork light barriers 51, 52 are in turn stationary on Keyboard frame 13 attached and work with two flags An ^¬ sentences 53, and 54 together on the underside of the key 11 so as to allow corresponding sensor signals with respect to the detection of the speed of the key 11, possibly also the positions of the key 11 ,

While the above particularly preferred embodiments of the present invention have been explained, it goes without saying that other modifications and modifications are possible within the scope of the invention. Thus, in particular, the detailed embodiments according to the preceding embodiments are interchangeable, i. In principle, for example, a lever arrangement as shown in FIGS. 1 and 4 can be combined in conjunction with speed sensor means 44 according to FIGS. 10 to 12 or 18 and 19, and correspondingly, individual components as described above can also be used in other systems Shapes are combined.

Claims

Claims:

A key device (10) for an electronic keyboard instrument, e.g. a digital piano or keyboard, with at least one on a frame (13) pivotally mounted key (11) and one of this key (11) associated with the frame (13) pivotally mounted weight part lever (15), which upon pressing the key

(11) is pivoted by this key (11), as well as position and speed measuring means (28 ') for the weight part lever (15) to a sound triggering and volume

determining, characterized in that the measuring means (28 ') with non-contact sensor means (28) for the detection of positions and the speed as well as the direction of movement of the weight part lever (15) when pressing the key

(11) are formed.

2. Button device (10) according to claim 1, characterized in that the non-contact sensor means (28) with preferably stationary light barrier means (22, 23, 24, 25) are formed.

3. button device (10) according to claim 2, characterized in that the light barrier means comprises two adjacently arranged sensors (24, 25).

4. key device (10) according to claim 2 or 3, characterized in that the light barrier means are transmitted light barrier means.

5. button device (10) according to one of claims 2 to 4, characterized in that the light barrier means are associated with a plate-shaped part (15 ') of the weight part lever (15).

6. button device (10) according to one of claims 2 to 5, characterized in that the light barrier means are associated with a slotted flag (21) on the weight part lever (15).

7. key device (10) according to claim 6, characterized net, that the flag (21) has two slots (22, 23).

8. key device (10) according to one of claims 1 to 7, characterized in that the weight part lever (15) is arranged below the key (11).

9. key device (10) according to one of claims 1 to 7, characterized in that the weight part lever (15) above a remote from a player rear part (11 ') of the button (11) is arranged, which in the operating state of a Housing part (40) is covered.

10. Button device according to one of claims 1 to 9, characterized in that arranged on a button bottom non-contact speed sensor means (44).

11. Button device according to claim 10, characterized in that the speed sensor means (44) on the bottom of the button with an optical sensor, preferably a reflection light sensor, are executed.

12. Button device according to claim 10 or 11, characterized in that the speed sensor means (44) are formed on the underside of the key with a preferably transparent measuring strip (42) which is connected to the key (11), provided with a scale is, and with a stationary arranged optical sensor (43) cooperates.