AT510839B1 - BUTTON DEVICE FOR AN ELECTRONIC BUTTON INSTRUMENT - Google Patents

Abstract

Key device (10) for an electronic keyboard instrument, comprising at least one button (11) pivotally mounted on a frame (13) and a lever-like weight part (14) associated with said button (11) and pivotally mounted on the frame (13) Hammer (15), which is pivoted by pressing this key (11) when the key (11) is pressed, as well as with position and speed measuring means (28 ') for the hammer (15) to determine a sound triggering and volume in that the measuring means (28 ') are designed with non-contact sensor means (28) for detecting at least positions, preferably also the speed, of the hammer (15) when the key (11) is pressed.

Description

Austrian Patent Office AT510 839 B1 2012-07-15

Description: The invention relates to a key device for an electronic keyboard instrument, e.g. a digital piano or keyboard, with at least one pivotally mounted on a frame button and one of this button associated with the frame pivotally mounted weight part lever which is pivoted when pressing the button by this button, and with position and speed measuring means for the Weight part lever to determine sound triggering and volume.

In a classical piano results in each case the desired tone in terms of triggering, duration and volume while playing by a corresponding keystroke, which is more or less well controlled by the pianists after a long period of 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.

It is further known from US 5,291,011 A or JP 2001-222 282 A to detect in their movement by means of photo sensors the hammers which are impacted by a mechanism when depressing keys of such pianos and strike against an associated piano side, but this does not affect the tone generation.

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 accessed with an electronic control command. The keyboards for keyboards and the like. Electronic keyboard instruments have developed essentially from the accordion and more recently from the Elektroorgelbau coming here, where the keys are normally used only to start and to end a sound production. In order to improve the feel of such keyboards, attempts were also made to retrieve sounds (sounds) velocity critical. Using your fingers, using a keyboard, to strike the right tone at the right volume and at the right time requires years of practice not only in the conventional piano or grand piano, but also in electronic keyboard instruments; Here, too, many years of feedback between brain, fingers and sound production is required, with the problem that usually, due to the different 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 the results were never really satisfactory. 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 (the samples) are below the keys. Triggering occurs, for example, after approximately half of the keyway. In order to simulate a touch dynamic here - albeit in the simplest form - are provided according to the prior art, two offset in height relative to each other switching contacts which are attached to a circuit board and with a attached to the underside of each key "plunger". Collaborations; see. for example EP 0 727 766 or US 2006/0254406. Due to the time difference in the operation of the two offset contacts can be concluded that the speed of the key movement, which is considered a measure of the desired volume. Since the mentioned rubber-buffered offset contacts are relatively inaccurate, non-contact optical sensors have also been proposed, s. e.g. JP 10-026983. Another such more ancient proposal is disclosed in US 5,231,283, which shows a mechanical-optical sensor with a lever pivoted from the bottom of the key, which cooperates with a corresponding cutout with a light sensor directly below the respective key. According to CN 101320558 A (see also US 5 552 561 A and JP 03-107899 A), it has recently been proposed to use electrical rubber block contacts instead of at the To attach the underside (or top) of the button to the underside of a play weight lever pivoted by the button. However, there are these contacts adjacent to the pivot bearing for the lever, so that in the area of the contacts, the movement stroke is relatively low, similar to the case of the contacts and sensors directly to the bottom of the buttons. As a result, positions and speeds in a key operation can only be detected relatively inaccurately, and studies have shown that on the same keyboard different keys that are operated at the same speed, nonetheless produce tones with different volumes.

This disadvantage is in principle also given in the key device according to the 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 strikes against contacts, in particular above it.

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 on a concert grand piano. Furthermore, the aim is to achieve a cost-effective design of the key device, regardless of the most perfect simulation of playing on a conventional piano when playing on this keyboard device with a keyboard, etc.

To solve this problem, the invention provides a key device 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 itself contact-free sensor means are assigned to detect position as well as speed and direction of the weight part lever, hereinafter briefly lever, 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 that is, for example, a multiple of the angle " hubs " the button has 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 advantageous to provide as light barrier means simply transmitted light barrier means, although 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 lobed 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 may - for example, in addition, for verification purposes - are provided on the bottom of the button contactless speed sensor means. 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 described below with reference to preferred embodiments, to which it should not be limited, and with reference to the drawings even further.

[0024] [0024] [0024] [0024]

In detail in the drawing:

Figure 1 is a schematic, partially sectioned view of the arrangement of a key with a Spielgewicht- or weight part lever in an electronic keyboard instrument, namely in particular a keyboard, which also schematically a Klaviaturrahmen is illustrated in section.

Fig. 2 is a partial bottom view of an arrangement with a plurality of levers according to

Figure 1 in conjunction with a common circuit board.

Fig. 3 in a partial view according to arrow III in Fig. 1 on an enlarged scale the

Arrangement of a flag with two slots on a lever in the region of a bend of the same, 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 Tasteneinrich device with an upper-side, rear lever.

Fig. 8 is a plan view of a part of the lever of the key device according to

Fig. 7 with it attached flag and associated fork 3/16

Austrian Patent Office Figure 9 Figure 10 Figure 12 Figure 13 Figure 14 AT510 839 B1 2012-07 -15 photocell with two sensors; the arrangement of Figure 7 in the position in which the key is pressed. another embodiment of a key device, again with a lever below the key, but in the rear key area, again the key is shown in the rest position, similar to in Fig. 1 and Fig. 7; in a detailed plan view of a plate-shaped end portion of the lever in association with optical sensor means in the form of forked light barriers; in a representation similar to Figure 10, the key device while holding down the key. another embodiment of the key device which is similar to that of Figure 10, but modified in terms of the arrangement of speed sensor means on the key bottom; in a view corresponding to Figure 13, the key device while holding down the key. a schematic partial view of a reflective light sensor provided in this embodiment according to FIGS. 13 and 14 as a speed sensor means on the underside of the key; Figures 16 and 17 show another button device in views corresponding to Figures 1 and 4, in the rest position (Figure 16) and the other while the button is pressed (Figure 17) ..; and Figs. 18 and 19 show yet 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 the figures 1 to 6, a presently preferred embodiment of the present key device 10 is the first to be explained. This embodiment of the key 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.

1 and 4, a key 11 of the key device 10 is partially cut, once in the rest position (FIG. 1) and the other time in a game position (shown by arrow) (FIG. Fig. 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 hereinafter simply called lever 15 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, the actual game weight 14 forms. When the button 11 is pressed as shown in Fig. 4, the shorter lever arm 17 is pivoted counterclockwise as shown in Fig. 4 downwards, and the longer lever arm 18 is pivoted (also counterclockwise) while up; See also the arrows in Fig. 4 around the pivot bearing 4/16 16 16. Austrian Patent Office AT510 839 B1 2012-07-15 The lever 15 has with its longer lever arm 18 is an approximately rectangular angle 19; in the region of this bend 19, in the outer corner region, an adjusting screw 20 is screwed for the setting and fixing a flag 21.

The flag 21 has, as is apparent in particular from the enlarged view in Fig. 3, two slots 22, 23 cooperating with two (transmitted) sensors 24, 25, which via a holder 26 to a circuit board 27th are attached. The two through-light sensors 24, 25 together with the flag 21 or its slots 22, 23 contactless sensor means 28 as measuring means 28 'for the detection of positions and movements or speeds of the lever 15 with its corner 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, in each case 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 printed 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 circuit board 27 for multiple keys or more precise lever 15, 15 ', 15 " etc., these levers 15, 15 ', 15 " corresponding to the example in Fig. 2 not shown in detail keys 11 and each carrying a flag 21 with slots 22, 23 (see Fig. 3), with optical sensor means, here transmitted light sensors 24, 25, cooperate. As can be seen in Fig. 2, there are provided on either side of the lugs 21 sensor elements 29 (e.g., with one light transmitter, or with two light transmitters) and 30 (with two light receivers).

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. However, such a fine adjustment of a flag 21 may also be unnecessary if 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 switching on and off of the sound; see. in this context, for example, the figures 7 to 9, where a fixed flag 21 is attached to the lever 15.

In Fig. 5 is very schematically a basically conventional electronic unit for a keyboard device 10 according to, for example, Figs. 1 to 4 equipped electronic keyboard instrument, e.g. a keyboard, illustrated. The essential component of this electronic unit is a central computer or processor, a CPU 31; This CPU 31 is associated with an operator interface 32 for providing various control functions, such as e.g. Turn on / off or selection in the sound reproduction, etc. to control. Furthermore, the CPU 31 is connected to the output of a logic device 33, e.g. in the form of an FPGA decoder (FPGA - field-programmable gateway array). 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, in connection with Fig. 5 in Fig. 6, only the signal combination s1, s2 of a key 11, i. from their non-contact sensor means 28 (see Figures 1 to 4).

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 sounds (sounds) to be retrieved and a corresponding output circuit with an audio module Output 35 has, are connected to the unspecified illustrated speaker.

The CPU 31 further has a MIDI (MIDI musical instrument digital interface) and USB-MIDI output 36, respectively. In Fig. 6, there are individual phases X1 (rest position), Y (key pressed) and X2 (new rest position) are illustrated. In between, special signal trains in areas A, B are illustrated.

According to FIG. 6, by way of example, a key 11 (FIG. 1) is in the rest position in phase X1. In this rest position, the signals s1 of the sensor 24 and s2 of the sensor 25 are at "0" because the sensor means 28 are in the locked position by the flag 21 (see Fig. 1). The fact that the sensors 24, 25 are offset in the direction of movement, 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, when through Pressing the key 11 of 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 signal s1) and the speed of the flag 21 and thus the lever 15th ,

Therefore, as shown in Fig. 6, when the lever 15 moves to the right from the rest position (Fig. 1) with the flag 21, the slots 22, 23 run first in this order on the sensor 24 and then on the sensor 25 passing each time the associated signal s1 or s2 of "0 " (blocked) to "1" (Transmitted light) goes. In between, the sensors 24 and 25 are covered again, with the signals s1, s2 briefly returning to "0". decline. This signal situation is illustrated in FIG. 6 in the area A, wherein the numbers 1 to 5 in the phase A indicate the centers (comparable to "O-passages") of the edges of the signal s2. At the "O-passage" No. 1 of the signal s2, for example, the signal s1 of the sensor 24 has already reached its maximum, ie a logic "1"; similarly, with the further "O passes" 2, 3, 4, 5 of the signal s2 present time-shifted signal values, for example minima and maxima, in the signal s1, i. when "turn on" (Area A) the signal s2 follows the signal s1.

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

From the fact that always first the signal s1 of "0 " to "1" increases and only after the signal s2, the direction (direction "on" the tone or the note) is closed.

In the phase Y, the key 11 is depressed for a certain period of time, and in this phase Y, both sensor signals s1, s2 are at "1", as can be seen from the graph in FIG.

Thereafter, the key 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 new rest position, phase X2, signal s2 first goes to logical "0", then back to logical "1", back to logical "0". and back to logical "1" and then finally logically "0". Time-displaced (corresponding to the distance between the sensors 24, 25), the signal s1, when the key 11 is released, and thus when the note is switched off, follows the signal s2.

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 40 hidden area above the key 11 is arranged. The lever 15 is in turn pivotable about a pivot bearing 16, but it is now as a one-armed lever, with a stop 41, based on the pivot bearing 16 defines a short lever arm 17 6/16 Austrian Patent Office AT510 839B1 2012-07-15 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 to the embodiment of FIG. 1 to 6 simplified as just mentioned as 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 sensor signals can in turn be used similarly as explained with reference to FIG. 6 to determine the position for the beginning and the end of the desired sound and, based on the measurement of the speed, for the volume.

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

In Figs. 7 and 9, the printed circuit board 27 shown in Figs. 1, 2 and 4 has been omitted for the sake of simplicity; 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 circuit mounted on a circuit board, for example.

10 to 12, an embodiment of the present key device 10 is shown with a lever 15 below the key 11 again. 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 superposition, 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, i. as long as the light beam at the two sensors 24, 25 is interrupted, the sound remains on, then 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 again and so from their state shown in Fig. 12 in the resting state of FIG. 10 returns. In this phase, the lever 15 moves from the situation shown in Fig. 12 again in a pivoting movement about its bearing 16 now in the counterclockwise direction, i. with the end-side panel part 15x down and away from the sensors 24, 25th

Another difference from the previous embodiments consists 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 bar screen, which cooperates with a simple fork light barriers 43 so non-contact Speed sensor means 44 to form; 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 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 may additionally, for example, for review or for a coarse measurement, be provided, wherein the given due to the larger stroke of the end portion 15x 7/16 Austrian Patent Office AT510 839B1 2012-07-15 of the lever 15 greater accuracy Sensor means 18 priority.

The embodiment of FIGS. 13 and 14 corresponds, as regards the (main) sensor means 28 with the end portion 15x of the lever 15 as a diaphragm, the embodiment of FIG. 10 to 12. Instead of the measuring strip 42 shown in FIG. 10 and 12, however, a speed sensor means 44 with a reflected-light sensor 45 is provided on the underside of the key 11 of the key device 10, which cooperates with a projection 46 on the key bottom 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, on the underside of the key 11 of the key device 10 shown again arranged in the front region of the lever 15, substantially similar to the embodiment according to FIGS. 1 to 4, only with the difference that the flag 21 merely a slot 22nd In addition, a reflection 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 is designed as described in particular with reference to FIG. 15 so that a more detailed explanation is unnecessary.

The sensor means 28 with the forked light barriers 24 'and the flag 21 with the single slot 22 work in principle similar to that explained with reference to FIGS. 7 to 9 comparable contactless sensor means 28, so that a re-description may be unnecessary 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 shown in FIGS. 18 and 19 corresponds to the arrangement of the game weight 14 and lever 15 in the rear key area above the key 11 turn the arrangement in the embodiment of FIG. 7 to 9, so that, too With regard to the non-contact sensor means 28 formed here, which are likewise designed analogously to FIGS. 7 to 9, a repetition of the description can be dispensed with.

Unlike the embodiments just described with speed sensor means 44 on the underside of the key 11, in the embodiment according to FIGS. 18 and 19, an embodiment of such sensor means 44 is provided by means of two offset forked light barriers 51, 52; these two fork light barriers 51, 52 are in turn mounted stationarily on the keyboard frame 13 and work with two lugs approaches 53, 54 together on the underside of the key 11 so as to corresponding sensor signals with respect to the detection of the speed of the key 11, possibly also the positions of the key 11, to enable.

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. 8.16

Claims (12)

Austrian Patent Office AT510 839B1 2012-07-15 Claims 1. A key device (10) for an electronic keyboard instrument, such as a keyboard. 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 when pressing the button ( 11) is wasted by this key (11), as well as position and speed measuring means (28 ') for the weight part lever (15) to determine a sound triggering and volume, characterized in that the measuring means (28 ') are formed with non-contact sensor means (28) for the detection of positions and the speed and also the direction of movement of the weight part lever (15) when pressing the button (11). Second key 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 in 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. For this 7 sheets drawings 9/16