JPH04204798A - Keyboard device - Google Patents

Abstract

PURPOSE:To obtain the key touch feel corresponding to the various intensitie of key touch by providing a damper which strongly presses the other end of a hammer arm when the key is strongly touched and weakly presses the end when the key is weakly touched between the other end of a hammer arm provided with a weight for imparting a key load to the key at one end and the key. CONSTITUTION:A cylinder 11 which is fixed to a key 1 side and has an air vent hole 12 changes the load acting on the key by means of the damper mechanism consisting of a piston 13 which fits freely slidably into this cylinder 11, has a freely openable and closable valve 15 at the top end and is link-coupled at the bottom end to one end of the freely turnable hammer arm 18. The key touch feel meeting the various intensities of the key touch is obtd. in this way. and the unnaturality that the working force of the hammer mechanisms is felt at the fingertip like heretofore is eliminated. In addition, the key load is not generated by using spring force and, therefore, the sticky feel of the finger to the key is eliminated and the crisp key touch feel is obtd.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a keyboard device such as an electronic keyboard instrument.

[Prior art and its problems] In electronic keyboard instruments such as electronic pianos, musical sounds are generated by operating switches using keys, so if left as is, the touch feel of the keys would be significantly different from that of an acoustic piano. Become. In other words, on an acoustic piano, when a key is pressed, the force of the key press is transmitted to the hammer via the wippen and jack, and the hammer rotates and strikes the string, producing a musical sound. Therefore, at the initial stage of pressing the key, the load on the finger suddenly increases due to the reaction force from the wippen, and in the middle stage of pressing the key, the hammer becomes free and the load on the finger suddenly increases. The keys feel lighter to the touch.

Therefore, in conventional electronic 1llI keyboard instruments, a thin mark mechanism with a predetermined weight is provided below the key so that it can freely rotate in the vertical direction. Some keys rotate against their own weight to apply a predetermined load 17 to the keys, thereby making it possible to obtain a key touch feeling similar to that of an acoustic piano.

In addition, the return force of W can be generated by using the force of a spring installed between the key and the keyboard device, by using the rotational force when the marker arm returns to its original position due to gravity, or by a combination of both. I was using it.

However, with the conventional structure mentioned in 1-E7, you can feel the force of the hammer arm, etc. applied to the key, and the return of the key is slow, especially when using the force of a spring.
There were problems such as a feeling of stickiness.

In addition, with the conventional structure described above, keys were pressed weakly (keys were pressed weakly): it was not possible to obtain a light key touch feeling, and when keys were pressed strongly, a heavy key touch feeling was not obtained, and furthermore, the Vwl return was slow for both players. there were.

[FJ-like J of the invention] This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a light key touch feeling when the key is pressed weakly, and a heavy key touch feeling when the key is pressed strongly. was obtained, and the return of the key was fast! It is to provide the board packaging.

[Summary of the Invention] This invention is based on claim 1 in order to achieve the object described above.
In Kizou's invention, a key is provided with a key rotatably attached to an m* chassis and a hammer action mechanism that applies a key load to the key in conjunction with the key press operation. In the W device, the hammer arm mechanism has an intermediate portion rotatably attached to the keyboard chassis with a rotation fulcrum as a rotation fulcrum, and a weight at one end for applying a key load to the key. is provided between the other end of the hammer arm and the key, and when the key is pressed strongly, the other end of the hammer arm is strongly pressed, and when the key is pressed lightly, the hammer arm is provided with a , and a damper that weakly presses the other end of the hammer arm.

Also, the claims? In the invention described above, the key point is that the FIJI between the hammer arm and the key is further provided with a key return means for returning the key to the original position before the key is pressed when the key is released. .

[Embodiment] Hereinafter, an embodiment of the present invention will be explained in detail based on the drawings.8 Fig. 1 explains the main parts of a keyboard device, and this keyboard device has a plurality of keys 1 Furthermore, the tip of each end 1 is rotatably supported via a shaft 2 on a support member 4 fixed to a chassis 3.

A key guide 5 is vertically protruded near the end of the chassis 3 on the f-plane side. These key guides 5 consist of a set of side plates 6.6 protruding toward the F direction at the front end of each @i.
(- side is omitted from illustration) Fit between each #1 so that no horizontal wobbling occurs at +ig of each end 1! I will guide you along the y side of l.

The tip of a hook 7 formed integrally with the side plate in the middle of the key 1 projects forward from an opening 8 formed in a vertical portion of the chassis 3. One end of each hook 7 is in contact with a one-L limit stopper 9 fixed to the ) surface of the chassis 3 when keys are not pressed at each end 1, and a one-L limit stopper 9 fixed to the chassis 3-1- when keys are pressed at each end 1. Contact with stopper IO.

A damper is provided between each end l and a hammer arm, which will be described later.

That is, the cylinder 11 is provided on the tip side of each 91 in a state perpendicular to the axial direction of the six keys 1.

One end of the cylinder 11 is protected against cold weather, and a hole 12 for air vent is formed in the center thereof.

A piston 13 formed hollow at the F end of the cylinder 11
are fitted through a gasket 14 so as to be able to move up and down. One end of the piston 13 is equipped with a valve 15 which is supported by a shaft so that one end can be opened and closed, and a ventilation hole 16 is provided near the lower end.
is formed.

These cylinder 11 and piston 13 constitute a damper.

Further, a support plate 17 is fixed to the lower surface of the chassis 3 below the shaft 2 which is the rotational fulcrum of the six keys 1, and the middle of the hammer arm 18 is attached to the lower end of the support plate 17 via the shaft 19. It is rotatably supported on an axis.

One end of the hammer arm 18 extends toward the lower end of the piston 13, and an elongated hole 20 is formed at its tip.
1 is slidably fitted.

The other end of the hammer arm 18 extends outward through an aperture 22 formed in the vertical portion of the chassis 3, and a breech 23 is fixed to the tip thereof.

Open [Ialh material 24 material 4 on the opening edge under L of 1 part 22
has been done.

Furthermore, there is a distance between the part of the hammer arm 18 that is closer to the bulge 23 than the shaft 19 that is the pivot point of the hammer arm 18, and the protrusion 1a that is provided at a position that is closer to the tip side of the shaft 2 that is the pivot point of the hammer arm 18. They are connected by a connecting member 25 that constitutes a return means.

The connecting member 25 is a flexible member 1, for example, a band-shaped member 4j,
Alternatively, a material that can be bent in various ways like a string but does not stretch is selected.

On the other hand, a suppression fs 26 whose cross section is formed in a double 1-shape is protruded downward on the lower surface in the middle of the ill, and faces the suppression part 26 and is fixed to the F side of the chassis 3. A rubber switch 28 is fixed to the printed circuit board 274-.

The rubber switch 28 has first and second ports 1 with different heights.
41 the m points 29 and 30, respectively printed circuit board-L
corresponds to the first and second fixed contacts 31, 32 of.

On the other hand, a weight 23 is provided at the end of t11 on the -f front side. This weight 23 is provided to increase the weight of the key 'fj and to obtain a key touch feeling that feels like a blind stitch.

Next I! The operation of a keyboard device configured like J- will be explained.

When the W-key is pressed, the hammer arm 18 is rotated in the J1 direction in the figure by the weight of the weight 23 around the shaft 19, and the wtl is rotated around the shaft 2 via the connecting member 25. In the figure, it is rotated in the j direction. This confrontation,
The piston 13 is in the middle of the cylinder 14, and the valve 15 is closed. Further, the suppressing portion 26 is separated from the rubber switch 28.

When the key ml is pressed weakly, the key l, which hit the upper limit stopper 9 via the hook 7, descends at a low speed. At this time, since the valve 15 of the piston 13 is closed, the pressure in the cylinder 11 increases, which causes a resistance force against the key 1.
Lit is a load on the key 1, but since the descending speed of the cylinder 11 is slow, the air in the cylinder ll is gradually extracted from the air vent hole 12. Therefore, the load applied to mi is as shown by curve A in Figure 2. Stand up gently as shown.

Therefore, at the initial stage of keystroke, the fingertips can feel a light key touch.

- On the other hand, when the cylinder 11 descends, the pressure inside the cylinder 11 increases, and the piston 13 with the valve 15 closed.
is pushed downward, and the hammer arm 18 is rotated around the shaft 19 in the direction of the long force in the figure through the vehicle 2N, and the loose connection 25, which had been in a tensioned state until now, becomes slack, but weak. Since the key is pressed, the downward speed of the piston 13 is slow, and the rotational speed of the hammer arm 18 is also slow, so no large centrifugal force acts on the unlock 23.

Note that when the suppressor 26 presses the rubber switch 28 during this key-pressing operation, the first movable contact 29 and the first fixed contact 31 first come into contact with each other by 12 minutes, and then the second movable contact 30 is brought into contact with the second movable contact 30 with a time difference of 12 minutes. By contacting the second fixed contact 32, the initial touch data and the key-on data indicating the start of key presses, which are also based on the time difference, are sent to the 10 musical tone generation circuits (not shown), and these data are A musical tone is generated according to the following.

In addition, the above-mentioned light key touch feeling continues until the middle and final stages of keystroke, and eventually reaches the time 1 shown in FIG. 2. After that, the suppressing load of the rubber switch 26 etc. will be added to this, so it will take 2 hours 1. From now on, the load on #11 is shown on the straight line B in Figure 2.
It increases rapidly as shown in . Then, at the facing point indicated by tl, the r end of hook 7 of wll hits the lower limit stopper lO, and! ! The descent of 1 is stopped. As a result, a large stop F load is applied to fa,1.

On the other hand, when the key is released, the following operation occurs.

That is, stroke 1 [after 1, consecutive] I! The member 25 is under tension and the hammer arm 1 is in tension as shown in dotted lines in FIG.
8 is hung almost horizontally.

When the key is completed and the fingertip leaves the key 1, the hammer arm 18 of the weight 23 faces the axis 19 and rapidly moves in the direction 1. ':I! The projecting piece 1a of the key 1 (if turned to the F key) is applied with force, while tensioning the 1p fastening member 25.

As a result, the key l is rotated clockwise around the shaft 2 and tries to return to its original state, but the return movement tube of the key l is accompanied by the IJt of the cylinder 11, and the inside of the cylinder 11 becomes negative pressure, and the valve 15 opens, air flows into the cylinder t through the vent 16, the cylinder 11 is free, and the ill returns quickly.

Since wll can return quickly in this way, fast performance is possible.

On the other hand, when the key is pressed strongly, the cylinder 11 is rapidly lowered, but the air inside the cylinder 11 cannot be exhausted from the air vent hole 12 little by little, so the pressure inside the cylinder ll suddenly increases to hh+. Through the piston 13, the hammer arm 18 is rapidly rotated in the opposite direction as if flying along with the lift 23, and the connecting member 25 is also suddenly sagged.

As a result, the load t applied to tjll increases rapidly as shown by the curve C in FIG. 3, and eventually reaches the maximum load P.

As a result, similar to Acoustay and Kubi 7], a key touch feeling is obtained in which the load on the fingers suddenly increases in the initial stage of keystroke.

On the other hand, when the maximum load P is reached, the hammer arm 18 is rotated so as to fly together with the weight 23 as described in [7], so the centrifugal force acting on the weight 23 is large and the ta moment suddenly increases. increases to As a result, the piston 13 moves in the direction of ejection from the cylinder 11 faster than the key l is turned, the inside of the cylinder 11 becomes negative pressure, and the valve 15 opens. The pressure inside the cylinder 11 becomes the same as the outside pressure.

Therefore, as indicated by the symbol in FIG. 3, the load applied to tIll decreases rapidly.

As a result, a key touch feeling similar to that of an acoustic piano is obtained in which the load on the fingers suddenly decreases in the middle stage of keystroke.

Then, the key 1 enters the final stage of C keystroke, and the key 1 hits the r clothes stopper 10 via the hook 7, and at 5 hours t2, a large stop 1 load begins to be applied as shown in FIG. The F descent is stopped and the maximum load of 1 km is applied.

In this state, the connecting member 25 is in tension and the hammer arm 18 is shown in dotted lines in FIG. - It remains almost in the tree f state as 1-.

■-Statement 1. When the operation is viewed from the perspective of the displacement of the key 1, it becomes as shown in FIG. That is, the straight line section indicated by "go" in the same figure indicates a displacement of 191 when the key is pressed, and when the key is hit 1 hard, this straight line section becomes steep.

The key-pressing operation ends at time t3, the pressing part 26 presses the rubber switch 2B, and the key-pressing force is exhausted, and the effort n' is generated, but the finger is not it! There is a short "hold time" when the finger does not leave the key 1 for t, and then the finger leaves the key and the lII#
(Return) operation begins at time t4.

＃The following actions are taken for confrontation.

That is, during the above-mentioned "hold time", the key 1 is connected to the hammer arm 1 via the connecting member 25, albeit for a short time.
8 is held in a substantially horizontal "hanging" state.

When the fingertip leaves @i in this state, the hammer arm 18 is quickly rotated in the J1 direction by the action of the weight 23, and the key l is rotated clockwise about the shaft 2. At this time, the cylinder 11 is also ha, and the inside of the cylinder 11 becomes negative pressure, so q15 opens, air flows into the cylinder 11 from the vent hole 16, the inside of the cylinder 11 becomes equal to the outside pressure, and the cylinder 11 becomes free. You can freely -LJf. As a result, key 1 quickly returns to its original state.

T1 at this time! The displacement of l is shown in the straight line section indicated by "return J" in FIG. 4, and the key returns at time t5.

By the way, the dotted line curve indicated by the symbol X in FIG. On the other hand, when the hammer arm 18 with the weight 23 is used as in this embodiment, the return time is t5, which is faster than when a spring is used as the first stage of key return. .

In this way, in the above-mentioned II board device, the cylinder 11 having the air vent hole 41 fixed to the key l side is slidably fitted into the cylinder 11 and has a valve 15 at the upper end that can be opened and closed. However, since the load applied to the key is changed by a damper mechanism consisting of a piston 13 whose lower end is linked to one end of the rotatable hammer arm 1B, it is possible to obtain a key touch feeling that corresponds to the strength of the keystroke. At the same time, there is no unnatural feeling of feeling the force of the hammer mechanism on your fingertips, which is the case with conventional methods.

Furthermore, since the spring force is not used to generate the m load, the key does not feel stuck to the fingertip, and a crisp key touch feeling can be obtained.

Furthermore, since the return force of the key is obtained from the rotation of the hammer arm 18 having a weight 23 at the tip via the flexible connecting member 25, the return of the key is faster than in a structure using spring force. It can also handle fast performances.

[Effects of the Invention] As explained below-1-, according to the invention of claim 1, the key rotatably attached to the keyboard chassis;
In conjunction with this key press wI operation, the end of the chain is connected to the 1. In a keyboard device equipped with a hammer action mechanism that receives m loads, the hammer action mechanism has an intermediate portion rotatably attached to the keyboard chassis with a pivot point as a pivot point, and one end attached to a key. A hammer arm is provided with a weight for applying a weight to the key, and is provided between the other end of the hammer arm and the key, and strongly suppresses the other end of the hammer arm when the key is hit hard, The damper weakly suppresses the other end of the hammer arm in response to a weak keystroke, so that a key touch feeling corresponding to the strength of the keystroke can be obtained.

According to the invention as claimed in claim 2, a key return means is further provided between the hammer arm and the key for returning the end of the chain to its original position before the key is pressed when the key is released. Therefore, when the key is released, the weight of the weight allows the key to return quickly, and it is possible to respond to fast performances in one minute.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention. Fig. 1 is a sectional view of the keyboard device, Fig. 2 is a diagram showing the change in the load on the key when the key is pressed lightly, and tIS3 is a diagram showing the change in the load on the key when the key is pressed hard. Figure 4 is a diagram showing the change in load, and is a diagram showing the change in the key (Q. l...Key, 2.19...Axle, 11...
...Cylinder, 12...Air vent hole, 13
······piston. 15...Valve, 16...Vent hole, 18.
... Hammer arm, 23 ... Weight, 2
5... Connection member. Patent applicant Casio Computer Co., Ltd. -Q10- Kumafu c4&o4=) Figure 4

Claims (2)

[Claims] (1) A keyboard device comprising a key rotatably attached to a keyboard chassis and a hammer action mechanism that applies a key load to the key in conjunction with the key depression operation, the above-mentioned The hammer action mechanism includes a hammer arm whose middle portion is rotatably attached to the keyboard chassis using a rotation fulcrum as a rotation fulcrum, and whose one end is provided with a weight for applying a key load to the key. and provided between the other end of the hammer arm and the key,
A damper that strongly presses the other end of the hammer arm when the key is pressed hard, and weakly presses the other end of the hammer arm when the key is pressed weakly. keyboard device. (2) A claim characterized in that a key return means is further provided between the hammer arm and the key for returning the key to its original position before the key is pressed when the key is released. The keyboard device according to item 1.