JP2001159894A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard device with which an adequate key touch feel may be obtained by assuring the degree of freedom in designing a mass body while saving the spacing in a vertical direction and the keyboard device with which the desired key touch feel and more natural key touch feel may be obtained without complicating constitution. SOLUTION: An opposite surface 10A1a (under surface) to a key 1 of a first mass concentration part T10A1 of the mass body 10 is proximate in almost parallel to the top surface of the key 1 in a non-key touch state and an opposite surface 10A2a (under surface) to the key 1 of a second mass concentration part T10A2 is proximate in almost parallel to the top surface of the key 1 in a key touch state, by which the space saving in the vertical direction is achieved. In the case of a static touch, a first actuator 11 abuts on a first switch part 25 and reaction force F2 acts thereon and thereafter a second actuator 12 abuts on a second switch part 26 and reaction force F3 acts thereon, following which the reaction force is reduced by the buckling of the switch part 26 and a let-off feel is generated. As a result, the key touch feel (curve ST) of the static touch in a grand piano may be spuriously obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device having a mass that rotates in conjunction with a key depression operation.

[0002]

2. Description of the Related Art Conventionally, there has been known a keyboard device provided with a mass body which rotates in conjunction with a key pressing operation.

FIG. 10 is a sectional view showing a schematic configuration of a first conventional keyboard device. FIG. 3A shows a non-key pressed state, and FIG. 3B shows a key pressed state. Hereinafter, the performer side is referred to as the front side (meaning the front side).

This apparatus comprises a seesaw type key 101 which is operated to depress a key, and a mass body 110 having a mass for obtaining an appropriate inertial force when the key is depressed. The mass body 110 is
An extension 110A is provided above the key 101 and forward of the pivot point P 'on the support 120. A driven part 113 is provided on the lower surface of the extension part 110A. The mass body 110 is connected to the key 10 via the driven portion 113.
1 to rotate around a pivot point P ′.

[0005] As shown in FIG.
01, and the lower surface of the extended portion 110A is formed in a substantially planar shape, so that the lower surface of the extended portion 110A and the upper surface of the rear portion of the key 101 do not interfere with each other in the key pressing stroke. You have to keep in mind.

More specifically, when the key is not depressed, the front lower surface 110a of the extending portion 110A is moved to the key 10 as shown in FIG.
Care should be taken not to abut the rear upper surface of 1. On the other hand, when the key is depressed, it is necessary to take care that the rear lower surface 110b of the extension portion 110A does not contact the rear upper surface of the key 101 as shown in FIG. Therefore, in order to avoid interference during the entire key pressing stroke, the position of the pivot fulcrum P ′ is increased, that is, the height H ′ of the upper end position of the support 120 is set sufficiently high. In this example, as a result, the shelf 10
2 Distance h from the upper surface to the upper front end of extension 110A
Is minimum (h0 ′) when the key is not pressed and maximum (h0 ′) when the key is pressed.
1 ′), and a space in the vertical direction equal to or more than h1 ′ must be secured.

A weight such as a metal may be provided at the free end of the mass body 110 as a mass for obtaining an appropriate inertial force, but a weight is provided above the front end of the extension 110A. In this case, it is necessary to consider the amount of upward protrusion of the weight.

In the first conventional keyboard device, the space between the key and the mass body is sufficiently ensured in the entire stroke of the key depression in this way, and when the weight projects, the device is taken into consideration. Was set to the height.

On the other hand, a lever which is rotated by a key pressing operation,
A second conventional keyboard device provided with a lever or an elastic bowl-shaped member that comes into contact with a key by pressing a key is known. In this device, the elastic bowl-shaped member is deformed by being pressed by a keypress,
Utilizing that the pressing force (reaction force) changes according to the stroke, a touch feeling of a grand piano such as a click feeling is obtained.

[0010]

However, in the first conventional keyboard device, the position of the pivot fulcrum P 'is raised to ensure that interference between the key 101 and the mass body 110 is avoided. When the upper limit relationship between the key and the mass body is reversed, the position of the pivot point P 'needs to be set lower), and a space in the vertical direction must be secured accordingly.

Further, in the first conventional keyboard device, although the upper end of the front end of the extension 110A is located at the highest position in the key pressing stroke, the upper end of the front end is angular. Is not preferable from the viewpoint of securing space in the above. In particular, when a weight is provided above the front end of the extension 110A, the space in the vertical direction is further compressed by the amount of protrusion of the weight upward.

The required space can be reduced to some extent by changing the length, thickness, mass distribution and the like of the mass body. However, if the space constraints in the vertical direction are large, it is difficult to design such that the function of the mass body is optimized,
It also affects space savings other than in the vertical direction. Spending space only to avoid interference is disadvantageous in the design of the mass body, and hinders the setting of a good keypress feel.

On the other hand, in the above-mentioned second conventional keyboard device, the elastic bowl-shaped member for generating the reaction force is provided separately from the key switch portion for detecting the key-pressing operation, so that the configuration is complicated. In addition, it is difficult to delicately control the key depression feeling due to the influence of the reaction force of the key switch section.
In particular, since the key switch section is turned on near the key pressing end position, the influence on the key pressing feeling in the latter half of key pressing such as let-off is not small. Therefore, there is room for improvement in obtaining a more appropriate key press feeling.

Further, in the above-mentioned second conventional keyboard device, since only the click feeling in the outward stroke of the key press of the grand piano is considered, it is not enough to reproduce the key press reaction force of the grand piano. is there. That is, in a grand piano, the key press reaction force changes in the initial and middle stages of key press in a complicated manner, which not only affects the static touch feeling, but also transmits the key press reaction transmitted to the key during the return stroke after key release. Force also affects the keypress feel. Therefore, there is room for improvement in realizing a natural key press feeling closer to that of a grand piano.

In summary, the following can be said.

In order to obtain a keyboard mechanism of an electronic musical instrument simulating a grand piano, which has good sounding timing and good touch feeling, there are considerable structural restrictions. For example, if an elastic bulging portion such as a switch is designed to match the sounding timing to a grand piano, the touch feeling, especially the click feeling and the let-off feeling in the latter half of the key press can not be realized well, but if it is designed to focus on these feelings The timing of pronunciation is not good.

Therefore, it is conceivable that the elastic swelling portions may be separately provided for achieving the respective purposes in order to achieve the two purposes simultaneously. However, a plurality of elastic bulges used for achieving each other's purpose cause mutual interference. Here, if the elasticity of the switch is weakened, it may be possible to realize the touch feeling of a grand piano as a whole. However, since they cause so-called mutual interference, they tend to have a touch feeling that is artificially created with "red". In addition, it becomes difficult to improve the durability of the switch section.

The present invention has been made to solve the above-mentioned problems of the prior art. The first object of the present invention is to secure a degree of freedom in designing a mass body while saving space in the vertical direction. It is an object of the present invention to provide a keyboard device that can provide an appropriate key pressing feeling. A second object of the present invention is to set a key pressing reaction force in consideration of a reaction force generated in a final stage of key pressing for key pressing operation detection without complicating the configuration,
It is an object of the present invention to provide a keyboard device capable of obtaining a desired key-depression feel while eliminating the influence of key-depression operation detection.

Further, a third object of the present invention is to provide a keyboard capable of obtaining a more natural keying feel without complicating the structure and taking into account the key pressing reaction force in the key return stroke. It is to provide a device.

[0020]

According to a first aspect of the present invention, there is provided a keyboard apparatus comprising: a key which is turned by a key depression operation; and a driven portion which is driven by the key depression operation of the key. And a mass body that is driven through a rotating fulcrum portion, the driven portion of the mass body being an extending portion extending from the rotating fulcrum portion. The extended portion includes a first extended portion that is on the free end side of the driven portion, and a second extended portion that is on the rotation fulcrum portion side of the driven portion. When the key is at the non-key-pressing position, both opposing surfaces of the first extended portion and the second extended portion and the key are substantially parallel to each other in the longitudinal direction of the key, and the key is When the key is at the key-pressing end position, both opposing surfaces of the key and the other one of the first extension portion and the second extension portion in the longitudinal direction of the key. Characterized by being configured to be parallel proximity.

According to this structure, the driven portion is provided on the extending portion extending from the pivot point of the mass body, and the extending portion is the free end side of the driven portion. 1 extension part,
A second extending portion which is closer to the rotation fulcrum than the driven portion. When the key is depressed, the mass body is driven via the driven portion to rotate about the pivot point. When the key is in the non-key pressed position, the first extension portion and the second
Opposite surfaces of one of the extending portions and the key are close to and substantially parallel to each other in the longitudinal direction of the key. On the other hand, when the key is at the key-pressing end position, the opposing surfaces of the key and the other of the first extended portion and the second extended portion are substantially parallel to each other in the longitudinal direction of the key. In this way, by as close as possible to the key while avoiding interference with the key during the rotation process of the mass body due to key depression, while saving space in the vertical direction,
It is possible to secure a degree of freedom in designing the mass body and obtain an appropriate key pressing feel.

In order to achieve the first object, a keyboard device according to a second aspect of the present invention comprises: a key which is turned by a key pressing operation;
A keyboard that is driven by a key depression operation of the key and that rotates about a rotation center, wherein the mass is
A highest horizontal portion which is located at the highest position during the entire key pressing process from the start of key pressing to the end of key pressing in the portion of the mass body and which is substantially horizontal when located at the highest position; At least one of a lowest horizontal portion which is located at the lowest position in the entire key depression stroke among the portions of the mass body and becomes substantially horizontal when located at the lowest position. .

According to this configuration, the portion located at the highest position during the entire key pressing process from the start of key pressing to the end of key pressing among the portions of the mass body becomes substantially horizontal when located at the highest position. (The highest horizontal portion) and / or the portion located at the lowest position in the entire key pressing stroke among the portions of the mass body becomes substantially horizontal when located at the lowest position (lowest horizontal portion). This makes it possible to lower (increase) the position of the highest position (lowest position) during the entire key pressing stroke, so that pressure on the space in the vertical direction can be reduced. Therefore,
It is possible to secure a degree of freedom in the design of the mass body while obtaining a space saving in the vertical direction, and obtain an appropriate key-pressing feel.

According to a third aspect of the present invention, there is provided a keyboard device as set forth in the second aspect, wherein the mass body extends from the center of rotation. An inertia mass is provided by the provision of the weight in the setting portion, and the weight is arranged so as to be included in the extension portion below the highest horizontal portion or above the lowest horizontal portion. I do.

According to this configuration, since the weight is disposed below the highest horizontal portion or above the lowest horizontal portion so as to be included in the extension portion extending from the rotation center,
The weight does not protrude upward from the highest horizontal portion or downward from the lowest horizontal portion, and does not consume vertical space. Therefore, it is possible to secure a degree of freedom in designing the mass body and obtain an appropriate key-pressing feel while saving space in the vertical direction.

In order to achieve the first object, a keyboard device according to a fourth aspect of the present invention comprises: a key which is turned by a key pressing operation;
A seesaw structure mass body having both arms extending from the center of rotation, wherein the one of the arms has a driven part, and the center of rotation is formed by a driving force generated by a key pressing operation received through the driven part. And a mass body that rotates about the center, a weight is separately arranged on the one arm portion and the other arm portion, and the one arm portion of the mass body is located above the key by a key pressing operation. The mass body is arranged so that at least a part of the other arm portion of the mass body is located below the driven portion by a key-pressing operation as well as jumping up.

According to this structure, the key is rotated by the key pressing operation, and the mass body is centered on the center of rotation by the driving force by the key pressing operation received via the driven portion provided on one arm. Rotate. By the key-pressing operation, the one arm of the mass body jumps above the key, and at least a part of the other arm of the mass body is located below the driven part. Therefore, space can be saved by effectively utilizing the space in the vertical direction. In addition, since the weights are separately arranged on one arm portion and the other arm portion of the mass body, the size of both weights is relatively reduced as compared to a case where the weights are arranged only on one of the arm portions. To save space in the direction of the keyboard height. Therefore, it is possible to secure a degree of freedom in designing the mass body and obtain an appropriate key-pressing feel while saving space in the vertical direction.

In order to achieve the second object, a keyboard device according to a fifth aspect of the present invention comprises: a key which is turned by a key pressing operation;
A key body that is driven by the key pressing operation and rotates around a rotation fulcrum, a movable part including an elastic bulging part, and a fixed part corresponding to the movable part; A reaction force generating means for generating a reaction force by elastically deforming the elastic bulging portion, and a means separate from the reaction force generation means, for applying a reaction force to the key operated by key depression And a return means for returning the key, wherein the reaction force generating means and the return means cooperate to generate a let-off feeling immediately before the end of key depression.

According to this configuration, the reaction force generating means includes the movable portion including the elastic bulging portion and the fixed portion corresponding to the movable portion. By the key depression operation, the mass body is driven to rotate around the rotation fulcrum. When the key is pressed, the elastic bulging portion of the sensor section is elastically deformed to generate a reaction force. On the other hand, a return unit, which is a unit separate from the reaction force generation unit, applies a reaction force to the key to be pressed and returns the key. Then, the reaction force generating means and the return means cooperate to generate a let-off feeling immediately before the end of key depression. As a result, the key pressing reaction force can be set in consideration of the reaction force generated in the final stage of key pressing for key pressing operation detection without complicating the configuration, and the influence of the key pressing operation detection is eliminated. A desired key pressing feeling can be obtained.

As the return means, various configurations such as a reaction force of an elastic bulging portion that is elastically deformed, a reaction force due to the own weight of the mass body and / or a self weight of the key, and a reaction force due to a spring or the like can be applied. .

To achieve the second object, a keyboard device according to a sixth aspect of the present invention comprises: a key which is turned by a key pressing operation;
A mass body that is driven by a key depression operation of the key and rotates around a rotation fulcrum, a sensor unit including a movable unit including an elastic bulging unit and a fixed unit corresponding to the movable unit, The elastically bulging portion of the sensor portion is elastically deformed in accordance with a key pressing operation, so that the key pressing operation for generating a musical tone is detected and the key pressing reaction force in a predetermined mode is generated. The sensor unit is composed of independent first and second sensor units, the first sensor unit generates a first reaction force in accordance with a key pressing operation, and the second sensor unit performs a key pressing operation Accordingly, the second reaction force is generated later than the first reaction force, and a let-off feeling is generated immediately before the end of key depression.

According to this configuration, the sensor section includes the movable section including the elastic swelling section and the fixed section corresponding to the movable section. By the key depression operation, the mass body is driven to rotate around the rotation fulcrum. The elastic swelling portion of the sensor portion is elastically deformed in response to a key pressing operation. The key depression operation is detected by the elastic deformation of the elastic bulging portion, and the detection signal is used for musical tone instruction.
At the same time, the sensor portion generates a reaction force due to the elastic deformation of the elastic swelling portion, which is transmitted to the key via the mass body,
The key press reaction force is in a predetermined mode. As a result, the key pressing reaction force can be set in consideration of the reaction force generated in the final stage of key pressing for key pressing operation detection without complicating the configuration, and the influence of the key pressing operation detection is eliminated. A desired key pressing feeling can be obtained.

For example, the first reaction force is set to correspond to the reaction force at the time of pushing up the hammer of the grand piano, and the second reaction force is set to the key depression reaction due to the friction between the roller pad and the jack of the grand piano. By setting the force to correspond to the let-off feeling caused by the separation of the force and the two, it is possible to simulate the key press feeling of the grand piano.

To achieve the third object, a keyboard device according to a seventh aspect of the present invention comprises: a key which is turned by a key pressing operation;
The mass body driven by the key pressing operation of the key and rotating around the pivot point, and at least one of the self-weight of the key and the self-weight of the mass body, as a key-pressing reaction force characteristic with respect to a key stroke, a flat An initial reaction force generating means for generating a key pressing reaction force at an early stage of a key rotation forward stroke by key pressing; and an elastic bulging portion, wherein the elastic bulging portion is pressed by one of the key and the mass body. As a result of the protrusion being elastically deformed, a first angle-shaped reaction force is generated following the generation of the flat key-depression reaction force in the outward rotation of the key as a key-depression reaction force characteristic for the key stroke. It has a chevron reaction force generating means and an elastic swelling part, and the elastic swelling part is elastically deformed by being pressed by any one of the key and the mass body. , The second Yamagata reaction force of the key A second chevron reaction force generating means for generating the first chevron reaction force following the generation of the first chevron reaction force in the forward stroke, wherein the elastic bulging portion of the second chevron reaction force generating means has a bowl-like shape from a base end. The reaction force is high at the beginning of the pressing forward stroke, and the reaction force is lower than the initial stage of the pressing forward stroke during the middle to final stages of the pressing forward stroke, causing a feeling of buckling and the occurrence of pressing. It is characterized in that the reaction force generated when the pressure is released is smaller than the reaction force.

According to this configuration, a flat key reaction force is generated as a key pressing reaction force characteristic with respect to a key stroke by at least one of the own weight of the key and the own weight of the mass body at the beginning of the key rotation forward stroke due to the key pressing. Generated and pressed by one of the key and the mass body to elastically deform the elastic bulging portion of the first chevron reaction force generating means, the first chevron reaction force characteristic as a key pressing reaction force characteristic for a key stroke. Is generated following the generation of a flat keying reaction force, and is pressed by one of the key and the mass body to elastically deform the elastic bulging portion of the second angled reaction force generating means. A force is generated following the generation of the first chevron reaction.

Therefore, for example, the flat key pressing reaction force is set so as to correspond to the reaction force at the time of pushing up the hammer in the grand piano, and the first angle-shaped reaction force is determined by the friction between the roller pad and the jack in the grand piano. By setting the second angle-shaped reaction force to correspond to the let-off feeling caused by the separation of the roller pat from the jack, thereby simulating the touch feeling of a grand piano. Can be obtained. Moreover, as the reaction force generated by the elastic bulging portion of the second chevron reaction force generating means, the reaction force generated when the pressing is released is smaller than the reaction force generated when the pressing is performed. At the generated keystroke stroke position, hysteresis of the keystroke reaction force occurs between the forward stroke and the return stroke of the keystroke, and even when the key returns, it can be made closer to the keystroke reaction force of the grand piano.
Therefore, it is possible to obtain a more natural key-pressing feeling without complicating the configuration, in consideration of the key-pressing reaction force in the return stroke of the key-press.

[0037]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a sectional view of a keyboard device according to a first embodiment of the present invention. FIG. 3A shows a non-key pressed state, and FIG. 3B shows a key pressed state. Although the white key is shown in the figure, the same applies to the black key. In the present embodiment, the performer side is referred to as the front.

This device is configured as an electronic keyboard instrument,
It has a seesaw-type key 1 that is operated to depress the key, and a mass body 10 that is driven by the key 1 and rotates around a rotation fulcrum P.

A key support member 3 is provided on the shelf 2, and a plurality of keys 1 are supported by the key support member 3 so as to be rotatable in the key pressing and releasing direction. The stopper 4 comes into contact with the key 1 and defines the end position of the key depression of the key 1 (FIG. 2B). The upper surface of the rear end of the key 1 is smoothly processed, and functions as a driving unit 1a for driving the mass body 10.

A support member 20 is provided on the shelf 2 behind the key 1. On the upper part of the support member 20, a support section 20a in the shape of a semicircle is formed in the key arrangement direction over the entire key width. A plurality of fulcrum pins 23 protrude from the support portion 20a in correspondence with each key 1. The mass body 10 is configured not to fall out of the fulcrum pin 23 and to be rotatably supported by the support portion 20a.

The mass body 10 includes a front extending portion 10A (first extending portion) extending forward from the rotation fulcrum P, and a rotation fulcrum P.
And a rear extending portion 10B (second extending portion) extending rearward from the front end. The extension portion 10A is provided with a sound generation position adjusting screw 13. The lower end of the sounding position adjusting screw 13 is
It functions as a driven part 13a that comes into contact with the driving part 1a of the key 1. When the key 1 is pressed, the driving unit 1 a
3a, the mass body 10 rotates. The sounding position adjusting screw 13 is used to adjust the relationship between the amount of rotation of the mass body 10 and the sounding timing.

In the mass body 10, a mass for obtaining an appropriate inertial force when a key is pressed is mainly concentrated on the front extension portion 10A. Hereinafter, a portion of the extension portion 10A in front of the sound generation position adjustment screw 13 is referred to as a “first mass concentration portion 10A1”, and a portion of the extension portion 10A behind the sound generation position adjustment screw 13 is referred to as a “first mass concentration portion 10A1”.
Hereinafter, it is referred to as “second mass concentration unit 10A2”.

Since the mass body 10 is for imparting an inertial mass when a key is pressed, the mass body 10 can generate the inertial mass as a whole without having to concentrate the mass as described above. What is necessary is just to comprise. For example, the mass may have a substantially uniform mass in a cross section perpendicular to the long axis, or, as in a second embodiment of the present invention described later, may be provided at both ends 10f and 10r of the mass body 10. A configuration in which a metal such as iron is buried may be used.

As shown in FIG. 1A, the surface 10A1a (lower surface) of the first mass concentration portion 10A1 facing the key 1 is
In the non-pressed state, it is substantially parallel to the upper surface of key 1,
Moreover, they are close together. Also, as shown in FIG.
Opposite surface 10A2 of second mass concentration portion 10A2 to key 1
a (lower surface) is substantially parallel to and close to the upper surface of the key 1 in the key pressed state (when the key 1 is at the key pressing end position). By setting the lower surface of the extension portion 10A to such a shape, the height H of the upper end position of the support portion 20a is set as low as possible.

The rear extending portion 10B of the mass body 10 is bent in a U-shape. A first surface is provided on the lower surface of the rear extension portion 10B.
An actuator 11 and a second actuator 12 protrude. Below the rear extending portion 10B of the mass body 10,
A first switch board 21 and a second switch board 22 are provided. A first switch section 25 (reaction force generation means, sensor section) is provided on the first switch board 21, and a second switch section 26 (reaction force generation means, sensor section) is provided on the second switch board 22. 1, respectively.
A stopper 27 is provided behind the first switch board 21. The stopper 27 moves the mass body 1 when the mass body 10 rotates.
0 and performs a buffering function by contacting the rear end. Panel part 5
Is disposed above the key 1 and includes various controls and a display unit (not shown).

FIG. 2 is a sectional view showing the structure of the first switch section 25 and the second switch section 26. 2A shows the first switch unit 25, and FIG. 1B shows the second switch unit 26. Each of the first and second switch sections 25 and 26 is a contact time difference type two-make touch response switch made of rubber. In the key pressing stroke, the first actuator 11 firstly switches the first switch 25
, And after that, the second actuator 12
It is set so as to contact the switch unit 26.

In the present embodiment, the first switch unit 25 is used for key-on detection and the second switch unit 26 is used for key-off detection according to a predetermined algorithm. However, it may be configured to detect both key-on and key-off with only one of them, for example, only the second switch unit 26. Even in such a case, a switch unit that is not used for detecting a key pressing operation may be provided only to generate a key pressing reaction force as described later.

As described above, in the present embodiment, the first switch section 25 closer to the pivot point P is driven first, and the second switch section 26 farther from the pivot point P is driven.
Is driven later, a stable operation is ensured. That is, in a configuration in which the actuators 11 and 12 are separated from each other, the switch units 25 and 26
If the driving order is reversed, the operation may become unstable, which is not preferable.

Further, since the distance between the actuators 11 and 12 is sufficiently ensured, and the switches are driven in order from the switch portion closer to the pivot point P, the accuracy of sound generation timing and the like is improved. That is, for example, when the switch units 25 and 26 are arranged at positions corresponding to the timing of striking a hammer in a grand piano,
Even if this arrangement is slightly displaced on the side of the mass body 10, the effect is slight when it is made to correspond to the key 1. Therefore, even if the accuracy of each of the switches 25 and 26 itself is not so high, if a sound control processing system is constructed by combining them, it is possible to improve the accuracy of the sound position and, consequently, the accuracy of the touch response.

As shown in FIG. 5A, the first switch section 25 includes a movable section 25A and a fixed section 25B. The fixed portion 25B is provided on the upper surface of the first switch substrate 21 and has a fixed contact 25b having a comb-like pattern when viewed in plan.
1, 25b2. The movable part 25A is a skirt part 2
5c to form an elastic swelling portion, and a first
The actuator 11 comes into contact. The movable section 25A is provided with movable contacts 25a1 and 25a2 for the first and second makeups facing the fixed contacts 25b1 and 25b2, respectively. The movable contacts 25a1 and 25a2 are fixed contacts 25b
By touching 1, 25b2, a key pressing operation is detected.

As shown in FIG. 5B, the second switch section 26 is also constructed in the same manner as the first switch section 25,
6A and a fixing portion 26B. The fixed portion 26B includes fixed contacts 26b1 and 26b2, and the movable portion 26A has a skirt portion 26c and is an elastic swelling portion, and includes movable contacts 26a1 and 26a2. However, the thickness of the skirt portion 26c of the second switch portion 26 is formed thicker at the lower portion 26c2 and thinner toward the upper portion 26c1. As a result, not only a reaction force is generated, but also appropriate buckling is caused, and a let-off feeling as described later can be obtained. The buckling phenomenon is the same as that described later with reference to FIG.

FIG. 3 is a diagram showing a relationship between a keystroke at the time of key pressing and a key pressing reaction force (load). In the same figure, in the outward stroke of key 1 key depression, the key stroke is taken on the horizontal axis,
The key press reaction force (load) is shown on the vertical axis. 2B shows the reaction force when the first switch unit 25 is pressed, FIG. 2C shows the reaction force when the second switch unit 26 is pressed, and FIG. As a result of receiving the reaction force, the key depression reaction force applied to the key 1 at the time of key depression is shown. A curve ST in FIG. 7A shows a case where a key is pressed with a weak force that does not sound when speaking on a grand piano (static touch), and a curve DT in FIG. This shows a case where a key is pressed with a strong force (dynamic touch).

As shown in FIG. 5B, when the first switch unit 25 is pressed by the first actuator 11,
The skirt portion 25c (FIG. 2A) of the movable portion 25A bends to generate a reaction force F2 (first reaction force). Thereafter, the reaction force F2 is substantially constant until the contact of the contact.

On the other hand, as shown in FIG. 2C, when the second switch section 26 is depressed by the second actuator 12, the skirt section 26c of the movable section 26A (FIG. 2B).
Is bent to generate a reaction force F3 (second reaction force). But,
As described above, the thickness of the skirt portion 26c is
Since c2 is thicker and thinner toward the upper part 26c1, buckling starts soon from the upper part 26c1, and thereafter, the reaction force decreases until contact with the contact point.

The timings at which the reaction forces F2 and F3 are generated are offset by the setting of the contact timing between the actuators 11 and 12 and the switches 25 and 26 described above. In FIG. 3A, the range from the stroke position A to the substantially stroke position B is a range in which the reaction force by the first switch unit 25 can be applied, and the range from the stroke position B to the end position is the reaction force by the second switch unit 26. Is the range that can be added. As a result, a key pressing reaction force as shown in FIG.

That is, first, in the case of the static touch, the key 1
Abuts against the mass body 10 to generate a reaction force F1. The magnitude and generation timing of the reaction force F1 are set so as to approximate the key depression reaction force caused by pushing up the hammer in the grand piano. Next, the first actuator 11 comes into contact with the first switch section 25 to apply a reaction force F2. The magnitude of the reaction force to which the reaction force F2 is added and the generation timing of the reaction force F2 are set so as to approximate the key-pressing reaction force caused by pushing up the damper of the grand piano. Next, after the second actuator 12 comes into contact with the second switch portion 26 and the reaction force F3 is applied, the reaction force decreases, and rises rapidly near the key depression end. The magnitude of the reaction force to which the reaction force F3 is added, the timing at which the reaction force F3 is generated, and the manner of change in the reaction force thereafter are determined by the key depression reaction force due to the friction between the roller pad and the jack in the grand piano, and the key depression reaction force. It is set so as to approximate a let-off feeling caused by deviation.

With such a setting, it is possible to simulate a key touch feeling of a static touch on the grand piano in the key pressing forward stroke as shown by the curve ST.

On the other hand, in the case of dynamic touch, the mass 10
Is rotated only by the force given from the key 1 at the initial stage of key depression. Therefore, the drive unit 1a of the key 1 and the driven unit 13a of the tone generation position adjusting screw 13 are close to each other except during the initial stage of key depression. In this state, even if the mass body 10 presses the switch units 25 and 26, the reaction force is not necessarily transmitted to the key 1 as it is. Therefore, the influence of the reaction force as shown in FIGS. 7B and 7C does not always appear, and generally, the reaction force forms a curve DT. That is, although different depending on the key depression mode, a reaction force peak generally occurs at the initial stage of key depression, and the vehicle can directly enter the let-off area. It is presumed that the reaction force peak appears at the initial stage of key depression because an action close to the principle of collision acts between the finger and the key.

According to the present embodiment, the first mass concentration section 1
The surface 10A1a of the second mass concentration portion 10A2 facing the key 1 of the second mass concentration portion 10A2 is brought close to the upper surface (key-side facing surface) of the key 1 in a non-pressed state.
Since the A2a is close to the upper surface of the key 1 (the key-side facing surface) in a key-depressed state, the mass body 10 can be formed while avoiding interference with the key 1 during the turning process of the mass body 10 due to the key depression. It can be as close to the key 1 as possible.

That is, the height H of the upper end position of the support portion 20a can be set lower than in the case where the extension portion 10A has a uniform flat surface as in the configuration shown in FIG. Yes (H <H ′). As a result, the distance h from the upper surface of the shelf plate 2 to the upper end of the front end of the extension 10A is minimum (h0) when the key is not pressed and maximum (h1) when the key is pressed, as shown in FIG. Smaller than the configuration (h0 <h
0 ′, h1 <h1 ′). Therefore, it is possible to save space in the vertical direction of the keyboard device, and it is possible to secure a degree of freedom in designing the mass body 10, so that it is easy to set an appropriate key pressing feel.

In other words, the configuration around the keyboard is simple, but a large inertial mass can be obtained even if the height of the keyboard is set low. That is, when the key and the mass body are arranged within the same keyboard height, according to the configuration as in the present embodiment, a large inertial mass can be obtained with a small mass. This is because, by adopting such a configuration of the mass body 10, a large rotation range of the mass body 10 and thus a large moving distance can be ensured, and thereby a large substantial inertial mass can be secured.

Since the free end of the rear extending portion 10B of the mass body 10 is located below the driven portion 13a at the key pressing end position, the space in the vertical direction is effectively utilized to further increase the space. Can save money.

Also, a desired reaction force is generated at a desired timing by using the elastic force of the first and second switch portions 25 and 26, and a reaction force corresponding to a key pressing reaction force of a grand piano is generated. Because I tried to reproduce the let-off feeling,
It is possible to simulate a key touch feeling of a static touch in a grand piano. The driving unit 1a and the driven unit 13
Since it is configured to be able to abut / separate from a, it is possible to obtain a key press feeling of a dynamic touch.

Since the switch sections 25 and 26 have both a function of detecting a key press operation and a function of generating a key press reaction force, not only the configuration is simple, but also appropriate adjustment of the key press reaction force. Is easy. That is, the reaction force mode near the key pressing end is important for the key pressing feeling such as let-off feeling, and the key pressing operation is preferably detected near the key pressing end. Therefore, if both functions are configured separately, the reaction force generated near the key depression end by the switch unit greatly affects the key depression feeling, and the adjustment of the key depression reaction force becomes complicated. However, in the present embodiment, it is possible to easily adjust the key pressing reaction force including the let-off feeling by appropriately setting the reaction force by the switch units 25 and 26. Therefore, the key pressing reaction force can be set in consideration of the reaction force generated at the final stage of key pressing for key pressing operation detection without complicating the configuration, and the desired effect can be obtained by eliminating the influence of the key pressing operation detection. Key feeling can be obtained.

In this embodiment, the switch unit 2
Although the reaction forces of 5, 26 and the urging action (return means) of the mass body 10 in the return direction due to its own weight cooperate with each other, a key-pressing feeling such as a let-off feeling is generated immediately before the end of key-depression. Means for attaching the mass body 40 to the non-key-pressing position include various types of reaction force, such as a reaction force of an elastic bulging portion that is elastically deformed, a reaction force due to the own weight of the mass body 10 and / or a self-weight of the key 1, a reaction force due to a spring or the like. The configuration is applicable.

In this embodiment, the switch unit 2
Although the touch switches 5 and 26 are configured as touch switches, the present invention is not limited to this, and other configurations may be employed as long as they generate a key pressing reaction force and detect a key pressing operation. For example, a photo reflector composed of a light emitting element, a light receiving element and a reflection plate may be used.

In this embodiment, the case where the mass body 10 is arranged above the rear part of the key 1 has been described as an example. However, the present invention is not limited to this, and the mass body 10 is arranged below the rear part of the key 1. You may do so. In such a case, the driven portion is replaced with the sound-position-adjusting screw 13 so that the mass body 10 is pulled by the key 1 and when the key 1 is in the non-key-pressed position, the second mass concentration When the upper surface of the portion 10A2 approaches the lower surface of the key 1 substantially in the longitudinal direction of the key 1 and the key 1 is at the key-pressing end position, the upper surface of the first mass concentration portion 10A It may be configured so as to be substantially parallel and close to the lower surface of the first member.

(Second Embodiment) Hereinafter, a second embodiment of the present invention will be described.

FIGS. 4 and 5 are partial longitudinal sectional views of a keyboard device according to the second embodiment of the present invention. FIG. 4 shows a non-depressed state (a state in which a key 51 and a mass body 40 to be described later are at a rotation start position), and FIG. (A certain state). In these drawings, the upper case, the lid, and the like are omitted. Hereinafter, the player side (left side in FIG. 4) of the keyboard device is referred to as front, and the key rear end direction (right side in FIG. 4) as viewed from the player is referred to as rear side.

This device is a seesaw type key 51 (white key 51W and black key 51B) operated by a key press, a mass support member 70, and is rotatably supported by the support member 70 and driven by the key 51. Seesaw type mass body 4 that rotates
0.

A key frame 60 is provided on the shelf 52. A key support 53 is provided on the key frame 60, and the fulcrum pin 6 (the fulcrum pin 56 for the white key) is provided on the key support 53.
W, black key fulcrum pins 56B) are protruded in correspondence with the respective keys 51. Each key 51W, 51B has a fulcrum hole 5
1 Wa and 51 Ba are provided. Fulcrum hole 51 Wa,
Each of 51Ba has a diameter reduced downward. At the time of assembling each key 51 to the keyboard apparatus main body (attaching to the key frame 60), the fulcrum pin 6 is connected to the fulcrum holes 51Wa,
1Ba, thereby restricting the position of each key 51 in the key arrangement direction and the key longitudinal direction, and each key 51 is supported by the key support 53 so as to be rotatable in the key press / release direction.

Urethane foam is adhered to the upper surface of the rear end of each key 51, and a tape which is easy to slide is adhered to the upper surface. The portion to which the elastic body made of urethane foam and the tape is adhered functions as a drive unit 9 that drives the mass body 40 by contacting a sounding position adjusting screw 41 of the mass body 40 described later. The elastic body makes the contact smooth without chattering. That is, by the elastic body,
This means that the impedance matching between the key 51 and the mass body 40 at the time of driving can be appropriately performed (a vibration mode due to overshoot does not occur).

At the front of the key frame 60, a key press stopper 54 (a key press stopper 54W for a white key, a key press stopper 54B for a black key) and a key guide 55 (a key guide 555 for a white key)
W, a black key guide 555B) is provided for each key 51. The key pressing stopper 54 comes into contact with the key 51 and
(FIG. 5). The key guide 55 suppresses swinging of the key 51 in the key arrangement direction when rotating.

Key press stopper 5 on key frame 60
4. A switch board 7 is provided behind the key guide 55 and in front of the key support section 53, and a first key switch 58 is provided on the switch board 7 for each key 51. The first key switch 58 is pressed by the key 51,
It mainly detects a key press operation.

The mass support member 70 is provided on the shelf 52 near the rear end of the key 51. Support member 70
Are fixed in units of one octave, for example, and are fixed to the shelf 52 at appropriate positions at the front and rear. At the front of the support member 70, a non-key-pressing stopper 21 is provided for each key 51, and the non-key-pressing stopper 21 is brought into contact with the key 51 and rotated by the key being pressed. The start position (FIG. 4), that is, the position when the key is not pressed is regulated. At the rear of the support member 70,
A mass body stopper 72 described later is provided. The mass body stopper 72 has elasticity, and abuts on a contact portion 44 of the mass body 40 described later to regulate a rotation end position (FIG. 5) of the mass body 40 due to key depression and to perform a buffer function. .

The switch member 7 is further provided on the support member 70.
3 are provided. The switch board 73 is provided corresponding to the plurality of support members 70, for example, corresponding to all the keys.
Is fixed to the support member 70. On the switch board 73, a second key switch 75 is provided for each mass body 40. The second key switch 75 is pressed by the mass body 40 and mainly detects the key release operation of the key 51 indirectly. In the present embodiment, the setting mode is configured so that various musical tone controls can be performed by a predetermined algorithm based on the detection results of both the first key switch 58 and the second key switch 75. But
The tone control may be performed based on the detection result of one of the first key switch 58 and the second key switch 75.

The support member 70 also has a pivot shaft 32 fixed to the support member 70. The rotating shaft 32 is a mass body 4 described later.
The mass body 40 is rotatably supported by engaging with the 0 bearing portion 45 (rotation center).

In the present keyboard device, a so-called up-split structure is adopted, and the mass body 40 jumps above the key 51. The mass body 40 has a tail portion 47 to be described later at the key pressing start position.
The upper surface 47a (lowest horizontal portion) of the head 46 is located at the highest position, and the front upper surface 46d (highest horizontal portion) of the head 46 is located at the highest position at the key pressing end position. The position of the upper surface 46d of the head 46 in the position becomes the highest. Therefore, the height of this apparatus (the thickness in the vertical direction of the apparatus) is set mainly in consideration of the highest position of the front upper surface 46d.

FIG. 6 is a side view showing the structure of the mass body 40.

The mass body 40 is provided in order to obtain an appropriate key pressing feeling. The mass body 40 includes a sound position adjustment screw 41,
A portion (main body) excluding a front weight FRW (weight) and a back weight BUW (weight), which will be described later, is formed of resin, and each of the mass bodies 40 has the same configuration. In the mass body 40, bearing portions 45 having a hole of a partially circular shape are formed on both side surfaces. The mass body 40 is rotatably supported by fitting both bearing portions 45 to the rotating shaft portion 32 of the support member 70, and rotates about the bearing portion 45 when a key is pressed and released.

The mass body 40 includes a front extending portion 40A (arm portion) extending forward from the bearing portion 45, and a rear extending portion 40B (arm portion) extending rearward from the bearing portion 45. The mass body 40 has a mass for obtaining an appropriate inertia force when a key is pressed, and a head portion 46 of the front extension portion 40A and a tail portion 47 of the rear extension portion 40B have hollow weight attachment portions 46.
e and 47e are formed respectively. A front weight FRW and a back weight BUW made of metal or the like are separately arranged in the weight attachment portions 46e and 47e.

The weights FRW and BUW are assembled to the mass body 40 when the mass body 40 is molded by a mold.
Each weight FRW, by simultaneous molding of resin outsert to weights FRW, BUW as metal weights,
The BUW is performed by insert molding in a resin. In some cases, mass 40 and weight FR
W and BUW are formed separately, and weights FRW and BUW
The outer periphery of the mass body 4 is outsert-molded with a soft resin, and the outer periphery of the mass body 4 is clamped to the inner periphery of the weight attachment portions 46e and 47e.
0 may be completed.

Since the weights FRW and BUW are arranged so as to be included in the head 46 and the tail 47, respectively, the weights FRW and BUW do not protrude above the head 46 and the tail 47, and pressure on the space in the vertical direction is avoided. Have been.

The weights FRW and BUW are set to have different weights depending on the combination of the thickness and the size of the hollow portion (not shown), while keeping the shape of the outer edge substantially the same. The setting of the weight is made in consideration of both the dynamic touch and the static touch for all keys.For example, the moment of inertia is set so as to increase from the treble key to the bass key. Has been realized.

By attaching each of the weights FRW and BUW, the mass body 40 is set so that the front extension 40A is heavier than the rear extension 40B. Therefore, the key 51 is always in contact with the drive unit 59 of the key 51 in the non-key pressed state and in the initial state of the key pressed, and the key 51 and the mass body 40 are interlocked. In addition,
In some rare cases, the mass body 40 separates from the drive unit 59 of the key 51 in the middle of the key depression stroke depending on the key depression mode.

The sounding position adjusting screw 41 is provided on the extension 40A. The sounding position adjusting screw 41 includes a curved head portion 41a, an adjusting portion 41b having a hexagonal hole (not shown) for a hexagonal wrench, and a shaft portion 41 having a screw portion (not shown).
c is integrally formed, and is attached to the mass body 40 by insert molding at the time of molding the mass body 40 with a mold, for example. The sounding position adjusting screw 41 has a head 41a with a key 5
1 and the driving force generated by the key pressing in contact with the driving section 59 of the mass body 4.
0, which causes the mass body 40 to pivot. The sounding position adjusting screw 41 is inserted so as to protrude most downward when the mass body 40 is molded, and after molding, the amount of downward projection can be individually adjusted by rotating with a screwdriver. This makes it possible to adjust the relationship between the amount of rotation of the mass body 40 and the sounding timing detected by the second key switch 75.

Lower surface 46a of head 46 of front extension 40A
Has a smooth linear shape as viewed from the side, and is close to the upper surface of the key 51 in the non-key pressed state as shown in FIG. 4, thereby saving space in the vertical direction. In the lower surface 46a, the front is set slightly open with respect to the upper surface of the key 51 in the non-key pressed state (FIG. 4). Not to be. Lower surface rear part 4 behind lower surface 46a
6b is inclined upward toward the rear. As described above, the lower surface 46a is likely to open forward, but the lower rear portion 4a.
6b is inclined in this manner, so that the lower rear portion 46b is formed.
And the upper surface of the key 51 is less likely to interfere.

As in the first embodiment, similar to the surface 10A1a of the first mass concentration portion 10A1 facing the key 1, the key 51 is held when the lower surface 46a of the head 46 is not pressed.
It may be set so as to be substantially parallel and close to the upper surface.

The front upper surface 46d of the head 46 is formed in a substantially planar shape, and is set so as to be substantially horizontal with respect to the keyboard device at the key pressing end position (FIG. 5). As described above, in the entire key stroke, the head 4
Since the position of the upper surface 46d of 6 is the highest, setting in this way saves space in the vertical direction.

An actuator 42 is provided on the lower surface of the rear extension 40B.
With the rotation of 0, the key switch 75 of the support member 70 is pressed. A contact portion 44 is formed below the rear end of the rear extension portion 40B. The contact portion 44 contacts the stopper 72 for the mass body of the support member 70 by the rotation of the mass body 40.

The upper surface 47a of the tail portion 47 is formed in a substantially planar shape, and is set so as to be substantially horizontal with respect to the keyboard device in a non-key pressed state (FIG. 4). As described above, the tail portion 47 is located at the highest position at the key pressing start position. Therefore, by setting in this manner, the space in the vertical direction mainly in the vicinity of the tail portion 47 is saved.

Further, at the key pressing end position, the tail portion 47 of the mass body 40 is located below the sounding position adjusting screw 41, so that the space in the vertical direction can be effectively utilized to save space. Note that at least a part of the rear extending portion 40B may be located below the sounding position adjusting screw 41.

The lower surface 44a of the contact portion 44 is substantially straight when viewed from the side.
Reference numeral 4a denotes a key pressing end position (FIG. 5) which is set so as to be substantially horizontal with respect to the keyboard device. Since the lower surface 44a of the contact portion 44 is located at the lowest position at the key pressing end position, setting in this manner leads to saving of space in the vertical direction.

According to the present embodiment, the front upper surface 46d of the head 46 of the mass body 40 is
In consideration of the highest position among the 0 positions, the front upper surface 46d of the head 46 is positioned at the highest position of the key press end position (FIG. 5) with respect to the present keyboard device. Since it is set to be substantially horizontal, pressure on the space in the vertical direction can be reduced. Further, since the lower surface 44a of the contact portion 44 located at the lowest position in the entire key pressing stroke is set so as to be substantially horizontal with respect to the present device at the key pressing end position located at the lowest position, the vertical direction is reduced. Space pressure can be further alleviated. Further, by setting the upper surface 47a of the tail portion 47 located at the highest position only at the key pressing start position so as to be substantially horizontal with respect to the present device at the key pressing start position, the space in the vicinity of the tail portion 47 is compressed. It contributes to the mitigation of Therefore, it is possible to secure a degree of freedom in designing the mass body and obtain an appropriate key-pressing feel while saving space in the vertical direction. Further, since the degree of freedom in designing the mass body 40 is ensured, the same effect as that of the first embodiment can be obtained in facilitating setting of an appropriate key pressing feel.

The weights FRW and BUW are arranged so as to be included in the head 46 and the tail 47, respectively, above the front upper surface 46d of the head 46 and the upper surface 47a of the tail 47.
Of the weights FRW and BUW do not consume a space in the vertical direction. Therefore, the effect obtained by setting the front upper surface 46d, the upper surface 47a, and the like of the mass body 40 to be substantially horizontal as described above can be sufficiently exhibited, and the space in the vertical direction can be reduced by devising the design of the mass body 40 itself. Can be effectively achieved.

Further, at the key pressing end position, the rear extension 4
Since the tail portion 47, which is a part of 0B, is located below the sounding position adjusting screw 41, the space in the up-down direction can be effectively used, and the space can be further saved.

In order to save space in the vertical direction, the mass 40 located at the highest position or the lowest position during the entire key-pressing process from the start of key press to the end of key press must be moved to the present apparatus. What is necessary is just to set so that it may become substantially horizontal, and this part is not restricted to the free end part of the mass body 40. The above setting may be performed for only one of the highest position and the lowest position, but is preferably performed for both. It should be noted that even if the position is not the highest / lowest position, a portion that may be located close to the highest position is preferably set to be substantially horizontal as well, so that space can be easily saved in the vicinity of the portion. be able to.

In this embodiment, the highest / lowest portions such as the front upper surface 46d of the mass body 40 are set substantially horizontal, and the weights FRW and BUW are attached to the head 4
6. The point included in the tail portion 47 may be applied to the mass body 10 in the first embodiment. Thereby, the space in the vertical direction can be further reduced.

(Third Embodiment) Hereinafter, a third embodiment of the present invention will be described.

The structure of the keyboard device according to the third embodiment is basically the same as that of the second embodiment, and is as shown in FIGS. However, in the third embodiment, an appropriate key is pressed by the reaction force of the first key switch 58 (first chevron reaction force generating means) and the second key switch 75 (second chevron reaction force generating means). It is configured to get a feel.

In this embodiment, when key 51 is pressed,
First, each key switch 58 is pressed so that the first key switch 58 is pressed by an actuator (not shown) provided on the lower surface of the key 51 and the second key switch 75 is pressed by the actuator 42 of the mass body 40 with a delay. 58, 7
Arrangement and height such as 5 are set.

FIG. 7 is a sectional view showing the structure of the first key switch 58 and the second key switch 75. FIG.
Shows a first key switch 58, and FIG. 2B shows a second key switch 75. First and second key switches 58, 7
Reference numeral 5 denotes a two-make touch response switch of a contact time difference type made of an elastic member such as rubber.

As shown in FIG. 11A, the first key switch 58 has movable contacts 58a1 and 58a2 and fixed contacts 58b1 and 58b2 opposed thereto. In the first key switch 58, a skirt portion 58c extends upward from a base end portion 58g, and an elastic bulging portion bulging into a bowl shape is formed. The upper end 58d receives the pressing force of the key 51.
When the upper end 58d is pressed, the skirt 58c is elastically deformed (buckled), and the movable contacts 58a1 and 58a2 come into contact with the fixed contacts 58b1 and 58b2, and a key-pressing operation is detected. The buckling phenomenon will become more apparent as described later with reference to FIG.

The second key switch 75 has basically the same configuration as the first key switch 58. That is, FIG.
As shown in the figure, the second key switch 75 has a movable contact 75a.
1, 75a2 and fixed contacts 75b1 facing them,
75b2. The second key switch 75 is connected to the base end 7.
The skirt portion 75c extends upward from 5g to form an elastic bulging portion bulging in a bowl shape. The upper end 75d receives a pressing force of the actuator 42 of the mass body 40 as a driven part. When the upper end portion 75d is pressed, the skirt portion 75c is elastically deformed (buckled), and the movable contact 75a1,
75a2 and the fixed contacts 75b1 and 75b2 come into contact with each other, and a key depression operation is detected.

The thickness of the skirt portion 75c is the same as that of the base end portion 75g.
In the lower part 75c3 in the vicinity, it is thick and passes through the middle part 75c2,
It is formed so as to become thinner toward the upper part 75c1 near the upper end part 75d. As a result, as described later, the second key switch 75 generates an appropriate reaction force when pressed, and returns when generating a smaller reaction force when pressed when the pressure is released, thereby reducing the hysteresis of the reaction force. give. In addition, as a material of the second key switch 75, a material that can obtain this hysteresis more efficiently is selected, and also, structurally, the second key switch 75 is the first material.
Buckling action and hysteresis phenomenon appear more strongly than the key switch 58 of FIG. One of the reasons that the height of the skirt portion is higher in the second key switch 75 than in the first key switch 58 is.

More specifically, as shown in FIG. 7B, in the second key switch 75, the skirt portion 75c rises straight and almost vertically from the base end portion 75g, and the lower portion 75c3 and the middle portion 75c2. , Extending substantially linearly upward. However, as going upward, the diameters of the horizontal sections gradually decrease (the rate of change of the diameters is A). Upper part 75c connected to intermediate part 75c2
In 1, the diameter of the horizontal cross section becomes smaller (the rate of change of the diameter is B). Then, the change rate B is set so as to be larger than the change rate A, that is, the skirt portion 75c is formed so that the partial longitudinal cross-sectional shape thereof has an inverted J-shape. Accordingly, a configuration is realized in which the reaction force is high at the beginning of pressing, the reaction force decreases during the middle of the pressing forward stroke or to the end of pressing, and buckling progresses by being pressed. In addition, when the button is released, the reaction force is smaller than in the forward stroke, and hysteresis occurs.

In the skirt portion 75c, the position Z where the rate of change of the diameter of the horizontal cross section changes abruptly is a portion where buckling starts.

FIG. 8 is a diagram showing the relationship between the stroke of the key switch and the reaction force (load). In the figure, the stroke is shown on the horizontal axis, and the reaction force (load) is shown on the vertical axis. FIG. 6A shows the reaction force when the first key switch 58 is pressed, and FIG. 6B shows the second key switch 7.
5 shows the reaction force when 5 is pressed.

The reaction force due to the pressing is mainly due to the skirt 5
It is caused by buckling of 8c and 75c. The buckling of the bulging portions 58e, 58f, 75e, 75f of the movable contacts 58a1, 58a2, 75a1, 75a2 shown in FIG. 7 slightly generates a reaction force, but hardly affects the reaction force as a whole. However, the bulging portions 58e of these movable contacts,
The buckling of 58f, 75e, and 75f may be positively utilized to generate an appropriate reaction force as a whole. In that case, speaking of the first key switch 58, the bulging portion 58e
The buckling reaction force of either one of the bulging portion 58f and the bulging portion 58f may be used, or both buckling reaction forces may be used.

In the first key switch 58, as shown in FIG. 8 (a), immediately after being pressed, the reaction force suddenly rises, and at t1, the skirt portion 58c starts to buckle, and thereafter the reaction force rise decreases. On the other hand, in the second key switch 75, as shown in FIG. 7B, immediately after being pressed, the reaction force rises sharply, and at t2, the skirt 75
After c starts to buckle and the reaction force once decreases, the reaction force increases again after t3. The decrease in the reaction force at t3 produces a let-off feeling described later.

The relationship between the generation timing of the reaction force between the first key switch 58 and the second key switch 75 is determined when the reaction force of the first key switch 58 reaches the vicinity of t1 in FIG. The relationship is such that the second key switch 75 starts to be pressed and the reaction force of the second key switch 75 rises.

FIG. 9 is a diagram showing the relationship between the key stroke and the key pressing reaction force (load) at the time of key depression and key release. FIG. 3 particularly shows a key pressing reaction force when a key is pressed with a weak force that does not sound when speaking on a grand piano (static touch).

The curves SG and SB2 shown in FIG.
This figure shows the key press reaction force in the forward stroke and the return stroke of the key press by the present device. Note that a curve SB1 indicates a key pressing reaction force in the key pressing return stroke in the conventional device without hysteresis, and a curve P
B indicates the key press reaction force in the key press return stroke of the grand piano.

In the static touch of the present apparatus, a substantially constant flat key-pressing reaction force FF is generated in the initial stage of key-depression as shown by a curve SG. This is the key 51 and the mass 40 (weight FRW,
(Including BUW) (self-weight generating means). It should be noted that the flat keying reaction force FF is exclusively the key 5
It may be generated by the weight of either one of the mass body 40 and the mass body 40. Alternatively, an elastic swell is separately provided,
The key pressing reaction force FF may be generated by the reaction force.

Next, first, the first key switch 58 switches the key 5
When the button 1 is depressed, a first angle reaction force FM1 is generated. This is caused by the elastic deformation of the skirt portion 58c, and is caused by adding the reaction force generated before t1 in FIG. 8A to the key pressing reaction force FF. Then, the second key switch 7
When 5 is pressed by the actuator 42 of the mass body 40, a second chevron reaction force FM2 is generated. This is caused by the elastic deformation of the skirt portion 75c, and the peak and the position of the drop (let-off) after the peak are shown in FIG.
It occurs corresponding to t2 and t3 in (b).

The magnitude, timing and manner of generation of the flat keying reaction force FF are set so as to approximate the keying reaction force caused by pushing up the hammer of the grand piano. The magnitude, generation timing and generation mode of the first chevron reaction force FM1 are set so as to approximate the key depression reaction force caused by pushing up the damper of the grand piano. Second
The magnitude, timing and manner of generation of the angle-shaped reaction force FM2 are set so as to approximate the key-pressing reaction force due to the friction between the roller pad and the jack in a grand piano and the let-off feeling caused by the separation of both. . With such a setting, a key press feeling of a static touch on a grand piano is obtained in a pseudo manner in the key pressing forward stroke.

By the way, the key 51 by pressing the key and the mass body 40
At the time of return from the rotation end position, that is, in the return stroke of the key press, in a conventional keyboard device which obtains let-off by elastic deformation of an elastic bulging portion such as a switch, as shown by a curve SB1,
A reaction force having a peak close to the reaction force in the outward stroke occurred. For this reason, a strong keying reaction force that is pushed back in the return stroke is transmitted to the hand through the mass body or the key, causing a poor quality touch feeling. Therefore, in the present device, the reaction force at the time of releasing the pressure is made smaller than that at the time of the pressing by reducing the thickness of the skirt portion 75c toward the upper portion 75c1 as described above, and the hysteresis of the reaction force is obtained. I made it. Therefore, the second angle reaction force F in the return stroke
At the position corresponding to M2, the curve SB2 is considerably lower than the curve SB1, and is closer to the curve PB. As a result, the key press feeling immediately after the return from the rotation end position, particularly at the position corresponding to the let-off area, can be approximated to that of a grand piano.

According to the present embodiment, not only the same effects as in the second embodiment are obtained, but also the first key switch 58 and the second key switch 75 are elastically deformed during the key depressing forward stroke. , A flat keying reaction force FF, a first chevron reaction force FM1 and a second chevron reaction force FM2, and by appropriately setting their magnitude, generation timing, and form, the forward movement of the grand piano can be performed. It is possible to simulate a key touch feeling of a static touch.

Further, since the hysteresis of the key pressing reaction force is set between the forward stroke and the return stroke in the let-off region, it is possible to approach the key pressing reaction force of the grand piano even at the time of rotation return. Moreover, the hysteresis of the key pressing reaction force can be obtained by setting the skirt portion 75c of the second key switch 75 to be thinner upward, so that the configuration is not complicated and the cost does not increase.

Therefore, it is possible to obtain a natural key-touch feel closer to that of a grand piano, without complicating the structure, taking into account the key-pressing reaction force during the key-return process.

The head 41a of the sounding position adjusting screw 41
Is configured so as to be able to contact / separate from the drive unit 59 of the key 51, so that it is possible to obtain a key press feeling of dynamic touch as in the first embodiment. Further, since the first key switch 58 and the second key switch 75 have both a key pressing operation detecting function and a key pressing reaction force generating function, the configuration is simple and the influence of the key pressing operation detection is eliminated. This is also the same as in the first embodiment in that a desired key pressing feeling can be obtained.

Note that the first and second key switches 58 and 75
May be provided on the key side 1 or on the mass body 40 side. The hysteresis of the key pressing reaction force is mainly required in the let-off region. In the present embodiment, the second key switch 75 that causes the let-off has the hysteresis function. May be changed, for example, the key switch of the mass body 40 may be pressed first, and then the key switch of the key 51 side. In such a case, the key switch of the key 51 which is pressed more slowly may perform the let-off function and the hysteresis function.

Note that the first and second key switches 58 and 75
As in the first embodiment, another configuration such as a photo sensor may be adopted instead of the touch switch.

[0125]

As described above, according to the first aspect of the present invention,
According to the keyboard device of the above, the mass body is designed to be as close to the key as possible while avoiding interference with the key during the turning process of the mass body by pressing the key, thereby saving space in the vertical direction and designing the mass body. And a suitable key touch feeling can be obtained.

According to the keyboard device of the second aspect, the pressure on the space caused by the highest or lowest position is reduced, and the space in the vertical direction is reduced, and the degree of freedom in designing the mass body is increased. The key touch can be secured and an appropriate key pressing feeling can be obtained.

According to the keyboard device of the third aspect, the weight does not consume the space in the vertical direction, and the space in the vertical direction is saved, and the freedom of the design of the mass body is ensured and the appropriate weight is secured. A key press feel can be obtained.

According to the keyboard device of the fourth aspect, it is possible to secure a degree of freedom in designing the mass body and obtain an appropriate key-pressing feel while saving space in the vertical direction.

According to the keyboard device of the fifth aspect, the key pressing reaction force can be set in consideration of the reaction force generated at the final stage of key pressing for detecting the key pressing operation without complicating the configuration. Thus, it is possible to obtain a desired key-depression feel by eliminating the influence of the key-depression operation detection.

According to the keyboard device of the sixth aspect, the key pressing reaction force can be set in consideration of the reaction force generated in the final stage of key pressing for detecting the key pressing operation without complicating the configuration. Thus, it is possible to obtain a desired key-depression feel by eliminating the influence of the key-depression operation detection. For example, the first reaction force is set to correspond to the reaction force at the time of pushing up the hammer in the grand piano, and the second reaction force is set to the key depression reaction force due to the friction between the roller pad and the jack in the grand piano, and By setting so as to correspond to the let-off feeling caused by the two coming off, the key-pressing feel of the grand piano can be obtained in a pseudo manner.

According to the keyboard device of the seventh aspect, it is possible to obtain a more natural key touch feeling without complicating the structure and taking into account the key pressing reaction force in the key return stroke.

[Brief description of the drawings]

FIG. 1 is a sectional view of a keyboard device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a first switch unit and a second switch unit in the same embodiment.

FIG. 3 is a diagram showing a relationship between a key stroke and a key pressing reaction force (load) at the time of key pressing in the same embodiment.

FIG. 4 is a partial longitudinal sectional view of a keyboard device according to a second embodiment of the present invention.

FIG. 5 is a plan view of the support member in the same form as viewed from above.

FIG. 6 is a side view of the mass body in the same embodiment.

FIG. 7 is a cross-sectional view illustrating a configuration of a first key switch and a second key switch in a keyboard device according to a third embodiment of the present invention.

FIG. 8 is a diagram showing a relationship between a stroke of a key switch and a reaction force (load) in the same embodiment.

FIG. 9 is a diagram showing a relationship between a key stroke and a key pressing reaction force (load) at the time of key pressing and key release in the same embodiment.

FIG. 10 is a sectional view showing a schematic configuration of a first conventional keyboard device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 key, 1a drive part, 3 key support members, 10
Mass body, 10A front extension part (first extension part), 10
A1 first mass concentration portion, 10A1a, 10A2a facing surface, 10A2 second mass concentration portion, 10B rear extension portion (second extension portion) 13a driven portion, 20 support member, 20a support portion, 25 first switch portion (Reaction force generation means, sensor section), 26 second switch section (reaction force generation means, sensor section), 25A, 26A movable section,
25B, 26B fixed part, P rotation fulcrum part, 32
Rotating shaft part, 40 mass body, 40A front extension part (arm part), 40B rear extension part (arm part), 41 sounding position adjustment screw, 44 contact part, 44a lower surface (lowest horizontal part), 45 bearing Part (center of rotation), 46 heads,
46a lower surface, 46b lower surface rear portion, 46d front upper surface (highest horizontal portion), 47 tail portion, 47a upper surface,
51 key, 53 key support, 58 first key switch (first angle reaction force generating means), 59 drive, 60
Key frame, 70 support member, 75 second key switch (second angle reaction force generating means), FRW front weight (weight), BUW back weight (weight)

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hideki Ishihara 10-1 Nakazawa-cho, Hamamatsu-shi, Shizuoka F-term in Yamaha Corporation (reference) 5D378 DE02 DE42 DE47 DE52 EE01 EE04 EE06 EE07 EE11 SE21 WW14

Claims (7)

[Claims] 1. A keyboard device comprising: a key that is turned by a key-pressing operation; and a mass body that is driven through a driven part by the key-pressing operation of the key and that rotates around a turning fulcrum. The driven portion of the mass body is provided on an extended portion extending from the rotation fulcrum portion, and the extended portion is a first extended portion that is on a free end side of the driven portion. And a second, which is closer to the rotation fulcrum than the driven part.
When the key is at a non-key-pressing position, both opposing surfaces of the key and one of the first and second extended portions are substantially parallel in the longitudinal direction of the key. And when the key is at the key-pressing end position, the opposing surfaces of the key and the other of the first extended portion and the second extended portion are substantially parallel to each other in the longitudinal direction of the key. A keyboard device characterized in that the keyboard device is configured to perform the following. 2. A keyboard device comprising: a key that is turned by a key-depressing operation; and a mass that is driven by the key-depressing operation of the key and that is turned around a center of rotation. A highest horizontal portion which is located at the highest position during the entire key pressing process from the start of key pressing to the end of key pressing in the portion of the mass body and which is substantially horizontal when located at the highest position; At least one of a lowest horizontal portion which is located at the lowest position in the entire key depression stroke among the portions of the mass body and becomes substantially horizontal when located at the lowest position. Keyboard device. 3. The mass body is given an inertial mass by being provided with a weight at an extending portion extending from the center of rotation, and the weight is provided below the highest horizontal portion or at the lowest horizontal portion. The keyboard device according to claim 2, wherein the keyboard device is arranged so as to be included in the extension portion above the keyboard. 4. A seesaw-structured mass body having a key that is turned by a key-pressing operation and two arms extending from the center of rotation, wherein one of the arms has a driven part, and the driven part is And a mass body that rotates about the rotation center by a driving force generated by a key pressing operation received through the key unit. A weight is separately arranged on the one arm portion and the other arm portion. The one arm of the mass body jumps upward from the key, and the key is pressed so that at least a part of the other arm of the mass body is positioned below the driven part. A keyboard device comprising a mass body. 5. A key which is rotated by a key depression operation, a mass body which is driven by the key depression operation and rotates around a rotation fulcrum, a movable portion including an elastic bulging portion, and the movable portion A reaction force generating means for generating a reaction force by elastically deforming the elastic bulging portion in response to a key pressing operation of the key; and a means separate from the reaction force generating means. And return means for applying a reaction force to the key to be depressed and returning the key, and the reaction force generation means and the return means cooperate to give a let-off feeling immediately before the end of key depression. A keyboard device characterized in that the keyboard device is configured to generate the key. 6. A key which is rotated by a key depression operation, a mass body which is driven by the key depression operation and rotates around a rotation fulcrum, a movable portion including an elastic bulging portion, and the movable portion A key portion corresponding to the key portion, and a key pressing operation for generating a musical tone is detected and a predetermined portion is detected by elastically deforming the elastic bulging portion of the sensor portion in accordance with the key pressing operation of the key. The sensor unit is configured to generate a key pressing reaction force according to an aspect, wherein the sensor unit includes independent first and second sensor units, and the first sensor unit is configured to perform a first key operation in accordance with a key pressing operation. The second sensor unit is configured to generate a reaction force, generate a second reaction force later than the first reaction force with the key pressing operation, and generate a let-off feeling immediately before the end of the key pressing. A keyboard device. 7. A key that rotates by a key-pressing operation, a mass that is driven by the key-depressing operation of the key and that rotates around a rotation fulcrum, and at least one of a dead weight of the key and a dead weight of the mass On the other hand, an initial reaction force generating means for generating a flat key reaction force at the beginning of the key rotation forward stroke by the key depression as a key depression reaction force characteristic with respect to a key stroke; And the elastic bulging portion is elastically deformed by being pressed by one of the mass members, so that a first angle-shaped reaction force is generated as a key-depression reaction force characteristic with respect to the key stroke in the rotation forward stroke of the key. A first angled reaction force generating means for generating the flat keying reaction force following the generation thereof; and an elastic bulging portion, wherein the elastic bulging portion is elastically pressed by one of the key and the mass body. By deforming, the keystroke A second angle-shaped reaction force generating means for generating a second angle-shaped reaction force following the generation of the first angle-shaped reaction force during the key's rotation forward stroke, as the key reaction force characteristic; The elastic bulging portion of the force generating means is formed by bulging in a bowl shape from the base end portion, and its reaction force is high at the beginning of the pressing forward stroke, and the reaction force is increased during the middle to final stages of the pressing forward stroke. A keyboard device that is configured to be lower than that to generate a buckling feeling and that a generated reaction force at the time of pressing release is smaller than a generated reaction force at the time of pressing.