JP2004246382A - Keyboard instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyboard instrument which gives a more natural keying feeling while even a keying reaction force in a return stroke of keying is taken into consideration without making the constitution complex. <P>SOLUTION: A second key switch 75 is so formed that the partial longitudinally sectional shape of its skirt part 75c is an inverted J shape, the reaction force is large in the beginning of depression, decreases from the middle to the end of the stroke of depression, and the switch buckles more when depressed. When a stationary touch is made, a nearly constant and flat keying reaction force FF is generated in the beginning of keying with the weight of a key 51 and a mass body 40, the first key switch 58 is depressed by the key 51 to generate a first mountain-shaped reaction force FM1 through elastic deformation of a skirt part 58c, and then a second key switch 75 is depressed by an actuator 42 of the mass body 40 to generate a second mountain-shaped reaction force FM2 through elastic deformation of the skirt part 75c. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a keyboard device provided with a mass body that rotates in conjunction with a key pressing operation.

  2. Description of the Related Art Conventionally, there has been known a keyboard device provided with a mass body that rotates in conjunction with a key pressing operation (see Patent Documents 1 and 2 below).

  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 device is composed of a seesaw-type key 101 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 has an extension 110A that extends above the key 101 and forward of the rotation fulcrum P ′ on the support 120. A driven portion 113 is provided on the lower surface of the extension 110A. The mass body 110 is driven by the key 101 via the driven part 113, and rotates around the rotation fulcrum P '.

  In the case where the pivot fulcrum P ′ is arranged slightly behind the key 101 and the lower surface of the extension 110A is formed in a substantially planar shape as shown in FIG. Care must be taken that the lower surface of the portion 110A does not interfere with the rear upper surface of the key 101.

  Specifically, when the key is not pressed, care is taken so that the front lower surface 110a of the extension 110A does not abut the rear upper surface of the key 101 as shown in FIG. On the other hand, when the key is pressed, 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 point P 'is increased, that is, the height H' of the upper end position of the support portion 120 is set sufficiently high. In this example, as a result, the distance h from the upper surface of the shelf board 102 to the upper end of the front end of the extension 110A is minimum (h0 ′) when the key is not pressed, maximum (h1 ′) when the key is pressed, and up and down more than h1 ′ Space in the direction must be reserved.

  In addition, as a mass for obtaining an appropriate inertial force, for example, a weight such as a metal may be provided at a free end of the mass body 110, but when a weight is provided at an upper part of a front end of the extension 110A, The amount of upward protrusion of the weight must also be considered.

  In this way, in the first conventional keyboard device, the distance between the key and the mass body is sufficiently ensured in the entire stroke of the key press, and the height of the device is taken into consideration when the weight is projected. Had to be set.

On the other hand, as shown in Patent Literature 3 below, a second conventional keyboard device provided with a lever that rotates by a key press operation and an elastic member that comes into contact with the lever or the key by the key press is known. . In this apparatus, the elastic member is pressed by a key and deformed, and the pressing force (reaction force) changes according to the stroke, thereby obtaining a touch feeling of a grand piano such as a click feeling.
JP 06-289850 A Japanese Patent Publication No. 06-034166 JP 07-181959 A

  However, the above-mentioned second conventional keyboard device only considers the click feeling in the outward stroke of the key press of the grand piano, and is therefore insufficient to reproduce the key press reaction force of the grand piano. That is, in a grand piano, the key press reaction force changes in the initial and middle stages of the 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 the key is released. Force also affects the keypress feel. Therefore, there is room for improvement in realizing a natural key pressing 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 that simulates a grand piano with good sounding timing and good touch feeling, there are considerable structural restrictions. For example, if an elastic bulging part such as a switch is designed to match the sounding timing to the grand piano, the touch feeling, especially the click feeling and the let-off feeling in the latter half of the key press cannot be realized well, but if it is designed to focus on these feelings The timing of pronunciation is not good.

  Therefore, it is considered that the elastic swelling portions may be separately provided to achieve both purposes in order to achieve both purposes simultaneously. However, a plurality of elastic bulges used for achieving each other's purpose cause mutual interference. Here, if the elastic force 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, and its object is to provide a more natural structure in consideration of the key pressing reaction force in the return stroke of the key pressing without complicating the configuration. It is an object of the present invention to provide a keyboard device that can provide a key press feeling.

  In order to achieve the above object, a keyboard device according to claim 1 of the present invention includes a key that rotates by a key depression operation, and a mass body that is driven by the key depression operation and rotates around a rotation fulcrum. An initial reaction force that generates a flat keying reaction force at an early stage of the key rotation forward stroke by a keypress as a keying reaction force characteristic with respect to a keystroke by at least one of the own weight of the key and the own weight of the mass body. Generating means, and an elastic bulging portion, wherein the elastic bulging portion is elastically deformed by being pressed by any one of the key and the mass body, so that the key pressing reaction force characteristic with respect to the key stroke is the first key pressing reaction force. A first angle-shaped reaction force generating means for generating the angle-shaped reaction force following the generation of the flat key-pressing reaction force in the rotation forward stroke of the key; and an elastic bulging portion, wherein any of the key and the mass body is provided. The elastic bulge is elastically deformed Then, as a key pressing reaction force characteristic with respect to the key stroke, a second angle reaction force generating means for generating a second angle reaction force following the generation of the first angle reaction force in the turning forward stroke of the key. The elastic swelling portion of the second chevron reaction force generating means is formed by swelling in a bowl shape from the base end, the reaction force is high at the beginning of the pressing forward stroke, and the pressing forward stroke is in the middle to end stages. The reaction force is lower than at the beginning of the pressing forward stroke, causing a feeling of buckling.At the same time, the reaction force generated when the pressure is released is smaller than the reaction force generated when the pressure is released. And

  According to this configuration, due to at least one of the own weight of the key and the own weight of the mass body, a flat keying reaction force is generated as a keying reaction force characteristic with respect to a key stroke at an early stage of a key rotation forward stroke due to keying. The first ridge-shaped reaction force is flat as a key-depression reaction force characteristic with respect to a keystroke by being pressed by one of the key and the mass body to elastically deform the elastic bulging portion of the first angle-shaped reaction force generating means. The second chevron reaction force is generated following the generation of the key depression reaction force, and is depressed by one of the key and the mass body to elastically deform the elastic bulge portion of the second chevron reaction force generating means. It occurs following the occurrence of the angle reaction force of 1.

  Therefore, for example, the flat keying reaction force is set to correspond to the reaction force at the time of pushing up the hammer in the grand piano, and the first mountain-shaped reaction force is set 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 pad and the jack, the touch feeling of the grand piano is obtained in a simulated manner. be able to. 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, a hysteresis of the keypress reaction force occurs between the forward stroke and the return stroke of the keypress, and even when the key is restored, the keystroke can be made closer to the keypress 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 key return stroke.

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

  Hereinafter, embodiments of the present invention will be described 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, and has a seesaw-type key 1 that is operated to depress a 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 plate 2, and the plurality of keys 1 are supported by the key support member 3 so as to be rotatable in the key press / release direction. The stopper 4 comes into contact with the key 1 to define the end position of the key depression of the key 1 (FIG. 2B). The upper surface of the rear end portion of the key 1 is processed smoothly, 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 semicylindrical is formed in the key arrangement direction over the entire key width. A plurality of fulcrum pins 23 are provided on the support portion 20a so as to correspond to the respective keys 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 extension portion 10A extending forward from the pivot point P and a rear extension portion 10B extending rearward from the pivot point P. The extension portion 10A is provided with a sound generation position adjusting screw 13. The lower end portion of the sounding position adjusting screw 13 functions as a driven portion 13 a that comes into contact with the driving portion 1 a of the key 1. When the key 1 is pressed, the driving unit 1a comes into contact with the driven unit 13a, and 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. The portion of the extension 10A in front of the sound generation position adjusting screw 13 is hereinafter referred to as a “first mass concentration portion 10A1”, and the portion of the extension 10A behind the sound generation position adjustment screw 13 is hereinafter referred to as “second mass concentration portion 10A1”. It is referred to as “mass concentration portion 10A2”.

  Since the mass body 10 is for imparting an inertial mass at the time of key depression, if the mass body 10 is configured so as to generate the inertial mass as a whole without having to concentrate the mass on a part as described above. Good. For example, the cross section in the direction perpendicular to the long axis may have a substantially uniform mass, or the both ends 10f and 10r of the mass body 10 as in a second embodiment of the present invention described later. A configuration in which a metal such as iron is embedded may be used.

  As shown in FIG. 1A, a surface 10A1a (lower surface) of the first mass concentration portion 10A1 facing the key 1 is substantially parallel to and close to the upper surface of the key 1 in a non-key pressed state. . Further, as shown in FIG. 3B, the surface 10A2a (lower surface) of the second mass concentration portion 10A2 facing the key 1 is located on the upper surface of the key 1 in the key pressed state (when the key 1 is at the key pressing end position). And are almost parallel to each other. 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 concave shape. A first actuator 11 and a second actuator 12 project from the lower surface of the rear extension portion 10B. A first switch board 21 and a second switch board 22 are provided below the rear extending portion 10B of the mass body 10. A first switch unit 25 is arranged on the first switch board 21, and a second switch unit 26 is arranged on the second switch board 22 so as to correspond to each key 1. A stopper 27 is provided behind the first switch board 21. The stopper 27 comes into contact with the rear end of the mass body 10 when the mass body 10 rotates, and performs a cushioning function. The panel unit 5 is disposed above the key 1 and includes various controls and a display unit (not shown).

  FIG. 2 is a cross-sectional view showing the configuration of the first switch unit 25 and the second switch unit 26. FIG. 1A 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 is set to contact the first switch unit 25 first, and the second actuator 12 is set to contact the second switch unit 26 later.

  In the present embodiment, the first switch unit 25 is used for key-on detection according to a predetermined algorithm, and the second switch unit 26 is used for key-off detection. Although the instruction signal is obtained, 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 portion 25 closer to the pivot point P is driven first, and the second switch portion 26 farther from the pivot point P is driven later. As a result, stable operation is ensured. That is, in a configuration in which the actuators 11 and 12 are separated from each other, if the driving order of the switch units 25 and 26 is set to be reversed, the operation may become unstable, which is not preferable.

  In addition, since the distance between the actuators 11 and 12 is sufficiently ensured and the switches are driven in order from the switch closer to the pivot point P, the accuracy of the sounding timing and the like is improved. That is, for example, in a case where the switches 25 and 26 are arranged at positions corresponding to the timing of stringing by a hammer in a grand piano, even if this arrangement is slightly shifted on the mass body 10 side, the effect is made to correspond to the key 1. It will be a little. Therefore, even if the accuracy of each of the switches 25 and 26 itself is not so high, if a sound generation control processing system is constructed by combining them, the accuracy of the sound generation position and, consequently, the accuracy of the touch response can be improved.

  As shown in FIG. 2A, 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 includes fixed contacts 25b1 and 25b2 which are comb-shaped patterns as viewed in plan. The movable portion 25A has a skirt portion 25c and is an elastic swelling portion, and the first actuator 11 contacts the upper surface thereof. The movable portion 25A is provided with movable contacts 25a1 and 25a2 for the first and second makeups facing the fixed contacts 25b1 and 25b2, respectively. When the movable contacts 25a1 and 25a2 come into contact with the fixed contacts 25b1 and 25b2, a key pressing operation is detected.

  As shown in FIG. 2B, the second switch section 26 is configured similarly to the first switch section 25, and includes a movable section 26A and a fixed section 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 thicker at the lower portion 26c2 and thinner toward the upper portion 26c1. This not only generates a reaction force but also causes an appropriate buckling, so that 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 drawing, in the outward stroke of the key 1 pressing the key stroke, the horizontal axis represents the key stroke, and the key pressing reaction force (load) is represented along the vertical axis. 4B shows the reaction force when the first switch unit 25 is pressed, FIG. 4C shows the reaction force when the second switch unit 26 is pressed, and FIG. As a result of receiving the reaction force, the key pressing reaction force applied to the key 1 when the key is pressed 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. 2B, when the first switch section 25 is pressed by the first actuator 11, the skirt section 25c (FIG. 2A) of the movable section 25A bends to generate a reaction force F2. 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 pressed by the second actuator 12, the skirt section 26c (FIG. 2B) of the movable section 26A bends to generate a reaction force F3. I do. However, as described above, the skirt portion 26c is formed thicker in the lower portion 26c2 and thinner as it goes to the upper portion 26c1, so that buckling starts soon from the upper portion 26c1, and thereafter, a reaction force is generated until contact with the contact. Decreasing.

  The generation timings of the reaction forces F2 and F3 are offset by the setting of the contact timing between the actuators 11 and 12 and the switch units 25 and 26 described above. In FIG. 3A, the range from the stroke position A to almost the 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 a range that can be added. As a result, a key pressing reaction force as shown in FIG.

  That is, first, in the case of a static touch, the key 1 comes into contact with 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 unit 25, and a reaction force F2 is applied. 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 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 generation timing of the reaction force F3, and the manner in which the reaction force changes thereafter are based on the key pressing reaction force due to the friction between the roller pad and the jack in the grand piano, and the two. 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 press feel of a static touch on the grand piano in the key press forward stroke as shown by the curve ST.

  On the other hand, in the case of a dynamic touch, the mass body 10 is rotated only by the force given from the key 1 at the initial stage of key depression. When the screw 13 is close to the driven portion 13a, the reaction force is not necessarily transmitted to the key 1 as it is even if the mass body 10 presses each of the switch portions 25 and 26. Therefore, the influence of the reaction force as shown in FIGS. 7B and 7C does not necessarily appear, and the reaction force generally has a shape as indicated by a curve DT. That is, although it differs depending on the key pressing mode, a reaction force peak generally occurs at the initial stage of key pressing, 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 opposing surface 10A1a of the first mass concentration unit 10A1 with respect to the key 1 is brought close to the upper surface of the key 1 (key-side opposing surface) in a non-pressed state, and the second mass concentration unit Since the opposing surface 10A2a of the key 10A2 with respect to the key 1 is close to the upper surface of the key 1 (key-side opposing surface) in a pressed state, the interference with the key 1 is avoided during the turning process of the mass body 10 due to the key pressing. The mass body 10 can be made 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. <H '). As a result, the distance h from the upper surface of the shelf 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 <h0 ′, 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 of the present embodiment, a large inertial mass can be obtained with a small mass. This is because such a configuration of the mass body 10 can ensure a large rotation range of the mass body 10 and, consequently, a large moving distance, and thereby a large substantial inertial mass.

  At the key-pressing end position, the free end of the rear extending portion 10B of the mass body 10 is located below the driven portion 13a, so that the space in the vertical direction can be effectively used to further save space. Can be.

  In addition, 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 and a let-off feeling corresponding to a key pressing reaction force of a grand piano are obtained. Since the reproduction is reproduced, it is possible to simulate the key press feeling of the static touch on the grand piano. In addition, since the driving unit 1a and the driven unit 13a are configured to be able to contact / separate from each other, it is possible to obtain a key press feeling of a dynamic touch.

  Further, since the switch units 25 and 26 have both the function of detecting the key press operation and the function of generating the key press reaction force, not only the configuration is simple, but also appropriate adjustment of the key press reaction force is easy. is there. That is, the reaction force mode near the key pressing end is important for the key pressing feeling such as let-off feeling, but the key pressing operation is preferably detected near the key pressing end. Therefore, if both functions are provided separately, the reaction force generated in the vicinity of the key depression end by the switch unit has a large effect on 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 in the final stage of key pressing for detecting the key pressing operation without complicating the configuration, and the desired effect can be set by eliminating the influence of the key pressing operation detection. Key feeling can be obtained.

  In the present embodiment, the reaction force of the switches 25 and 26 and the urging action of the mass body 10 in the return direction due to its own weight cooperate with each other to generate a key-pressing feeling such as a let-off feeling immediately before the key-pressing ends. Means for attaching the mass body 40 to the non-key-depressed position include a reaction force of the 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 spring, and the like. Various configurations, such as a reaction force caused by the above, can be applied.

  In this embodiment, the switch units 25 and 26 are configured as touch switches. However, the present invention is not limited to this. Other configurations may be used as long as they generate a key pressing reaction force and detect a key pressing operation. May be adopted. For example, it may be a photo reflector composed of a light emitting element, a light receiving element and a reflector.

  In the present embodiment, the case where the mass body 10 is arranged above the rear part of the key 1 is exemplified, but the present invention is not limited to this, and the mass body 10 is arranged below the rear part of the key 1. Is also good. In this case, the driven part 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 is performed. When the upper surface of the portion 10A2 is substantially parallel to the lower surface of the key 1 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 is 1 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.

  4 and 5 are partial longitudinal sectional views of a keyboard device according to a second embodiment of the present invention. FIG. 4 shows a non-depressed state (a state in which the key 51 and the mass body 40 to be described later are at the 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 this 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.

  The present device includes a seesaw-type key 51 (white key 51W and black key 51B) that is operated to depress a key, a mass support member 70, and a rotatable support that is rotatably supported by the support member 70 and driven by the key 51 to rotate. A moving seesaw-type mass body 40.

  A key frame 60 is provided on the shelf board 52. A key support portion 53 is provided on the key frame 60, and fulcrum pins 6 (white key fulcrum pins 56 W and black key fulcrum pins 56 B) are provided on the key support portion 53 so as to correspond to the respective keys 51. I have. The keys 51W and 51B are provided with fulcrum holes 51Wa and 51Ba, respectively. Each of the fulcrum holes 51Wa and 51Ba is reduced in diameter 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 passes through the fulcrum holes 51Wa and 51Ba, whereby the position of each key 51 in the key arrangement direction and the key longitudinal direction is changed. While being regulated, 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 slidable tape is further adhered to the upper surface. The portion on which the elastic body made of urethane foam and 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. In other words, the elastic body allows appropriate matching of the vibration impedance during driving between the key 51 and the mass body 40 (a vibration mode due to overshoot is not generated).

  At the front of the key frame 60, a key press stopper 54 (white key press stopper 54W, black key press stopper 54B) and a key guide 55 (white key key guide 555W, black key key guide 555B) are provided. It is provided for each key 51. The key pressing stopper 54 comes into contact with the key 51 to regulate the rotation end position (FIG. 5) of the key 51 when the key is pressed. The key guide 55 suppresses the swing of the key 51 in the key arrangement direction at the time of rotation.

  A switch board 7 is provided on the key frame 60 behind the key press stopper 54 and the key guide 55 and in front of the key support 53, and the switch board 7 has a first key switch for each key 51. 58 are provided. The first key switch 58 is pressed by the key 51 and mainly detects a key pressing operation.

  The mass support member 70 is provided near the rear end of the key 51 on the shelf board 52. The support member 70 is formed, for example, in units of one octave, and is 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 a key press and to perform a buffering function. .

  The support member 70 is further provided with a switch board 73. The switch board 73 is provided corresponding to the plurality of support members 70, for example, corresponding to all keys, and is fixed to the support member 70 by screws 74. 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 allows various musical tone controls by a predetermined algorithm based on detection results by both the first key switch 58 and the second key switch 75. However, 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 the rotation shaft 32 fixed to the support member 70. The rotating shaft portion 32 engages with a bearing portion 45 of the mass body 40 described later to rotatably support the mass body 40.

  In the present keyboard device, a so-called upward spring type structure is adopted, and the mass body 40 springs upward from the key 51. The mass body 40 has an upper surface 47a of a tail portion 47, which will be described later, at the highest position at the key pressing start position and a highest position at the front upper surface 46d of the head 46 at the key pressing end position. Is the highest on the upper surface 46d of the head 46 at the key pressing end position. Therefore, the height of the present 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 configuration of the mass body 40.

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

  The mass body 40 includes a front extension 40A extending forward from the bearing 45, and a rear extension 40B extending rearward from the bearing 45. The mass body 40 has hollow weight attachment portions 46e and 47e at the head portion 46 of the front extension portion 40A and the tail portion 47 of the rear extension portion 40B as masses for obtaining an appropriate inertial force when a key is pressed. Each is formed. 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.

  When the weights FRW and BUW are attached to the mass body 40 by molding the mass body 40 with a mold, the weights FRW and BUW as metal weights are simultaneously molded with the resin outsert to the weights FRW and BUW. This is done by being insert molded in. In some cases, the mass body 40 and the weights FRW and BUW are separately formed, and the outer peripheries of the weights FRW and BUW are outsert-molded with a soft resin. The body 40 may be completed.

  Since each of the weights FRW and BUW is disposed 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, so that pressure in the vertical space is avoided. .

  The weights FRW and BUW are set to 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 portion substantially the same. The weight is set 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 toward the bass key. Has been realized.

  Due to the attachment of the weights FRW and BUW, the mass body 40 is set to be heavier at the front extension 40A than at the rear extension 40B. Accordingly, the key 51 and the mass body 40 are always in contact with each other in the non-key pressed state and the initial state of the key pressed, so that the key 51 and the mass body 40 are interlocked. In some rare cases, the mass body 40 may be separated 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 adjustment screw 41 is provided on the extension 40A. The sounding position adjusting screw 41 is formed by integrating a curved head 41a, an adjusting part 41b having a hexagonal hole (not shown) for a hexagonal wrench, and a shaft part 41c having a screw part (not shown). Then, the mass body 40 is attached to the mass body 40 by insert molding at the time of molding with a mold, for example. The sounding position adjusting screw 41 has its head 41a in contact with the driving portion 59 of the key 51 to transmit the driving force of the key depression to the mass body 40, whereby the mass body 40 rotates. 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.

  The lower surface 46a of the head portion 46 of the front extending portion 40A has a smooth linear shape when 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. I am planning. In the lower surface 46a, the front is set slightly open with respect to the upper surface of the key 51 when the key is not pressed (FIG. 4). Not to be. The lower rear portion 46b behind the lower surface 46a is inclined upward toward the rear. As described above, the lower surface 46a tends to open forward, but since the lower rear portion 46b is inclined as described above, interference between the lower rear portion 46b and the upper surface of the key 51 is less likely to occur.

  Note that, like the facing surface 10A1a of the first mass concentration portion 10A1 with respect to the key 1 in the first embodiment, the lower surface 46a of the head 46 is set so as to be substantially parallel to the upper surface of the key 51 in the non-key pressed state. May be.

  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, since the position of the upper surface 46d of the head 46 at the key-depressing end position is the highest in the entire key-pressing stroke, setting in this way saves space in the vertical direction.

  An actuator 42 is provided on the lower surface of the rear extending portion 40B, and the actuator 42 presses a key switch 75 of the support member 70 as the mass body 40 rotates. 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 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.

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

  The lower surface 44a of the contact portion 44 is substantially straight when viewed from the side, but the lower surface 44a of the contact portion 44 is substantially horizontal with respect to the keyboard at the key pressing end position (FIG. 5). It is set to be in the state. 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, in the entire key pressing stroke, considering that the front upper surface 46d of the head 46 of the mass body 40 is the highest position among the parts of the mass body 40, Since the front upper surface 46d of the head 46 is set to be substantially horizontal with respect to the present keyboard device at the key pressing end position (FIG. 5) located at the second position, pressure on the vertical space can be reduced. Can be. In addition, 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 apparatus at the key pressing end position located at the lowest position, 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 apparatus at the key pressing start position, the space in the vicinity of the tail portion 47 is compressed. Contribute 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 the space in the vertical direction. Further, since the degree of freedom in designing the mass body 40 is ensured, the same effect as in the first embodiment can be obtained in facilitating the 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, and are located above the front upper surface 46 d of the head 46, above the upper surface 47 a of the tail 47, or in the contact portion 44. Since the weights FRW and BUW do not protrude downward or the like, they 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 tail portion 47, which is a part of the rear extension portion 40B, is located below the sounding position adjustment screw 41, so that the space in the vertical direction is effectively used to further save space. Can be.

  In order to save the space in the vertical direction, the position of the mass body 40 positioned at the highest position or the lowest position during the entire key pressing process from the start of key pressing to the end of key pressing is made substantially horizontal with respect to the present apparatus. This portion is not limited to the free end of the mass body 40. The above setting may be performed for only one of the part located at the highest position and the part located at the lowest position, but is desirably performed for both. It should be noted that, even if the position is not the highest / lowest position, a portion which may be located close to the highest position is also preferably set to be substantially horizontal, so that it is easy to save space near the portion. be able to.

  Note that in this embodiment, the highest / lowest parts such as the front upper surface 46d of the mass body 40 are set substantially horizontal, and the weights FRW and BUW are included in the head 46 and the tail 47. May be applied to the mass body 10 in the first embodiment. Thereby, space saving in the vertical direction can be further achieved.

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

  The configuration 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 angle reaction force generating means) and the second key switch 75 (second angle reaction force generating means). It is configured to get a feel.

  In the present embodiment, when the key 51 is depressed, first, the first key switch 58 is depressed by an actuator (not shown) provided on the lower surface of the key 51, and after that, the second key switch 75 is moved by the mass body 40. The positions and heights of the key switches 58 and 75 are set so as to be pressed by the actuator 42.

  FIG. 7 is a cross-sectional view showing the configuration of the first key switch 58 and the second key switch 75. FIG. 7A shows the first key switch 58, and FIG. 7B shows the second key switch 75. Each of the first and second key switches 58 and 75 is a contact time difference type two-make touch response switch formed of an elastic member such as rubber.

  As shown in FIG. 1A, the first key switch 58 includes 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 above-mentioned buckling phenomenon will become more apparent as described later with reference to FIG.

  The second key switch 75 is also configured basically in the same manner as the first key switch 58. That is, as shown in FIG. 7B, the second key switch 75 includes movable contacts 75a1, 75a2 and fixed contacts 75b1, 75b2 opposed thereto. In the second key switch 75, a skirt portion 75c extends upward from a base end portion 75g, and an elastic bulging portion bulging in a bowl shape is formed. The upper end 75d receives a pressing force from 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 contacts 75a1 and 75a2 come into contact with the fixed contacts 75b1 and 75b2, and a key pressing operation is detected.

  The skirt portion 75c is formed so as to be thick at the lower portion 75c3 near the base end portion 75g and to become thinner as it goes to the upper portion 75c1 near the upper end portion 75d via the intermediate portion 75c2. Thus, 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 key 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 the hysteresis more efficiently is selected, and also, structurally, the second key switch 75 is replaced with the first key switch 58. The buckling action and the hysteresis phenomenon are configured to appear more strongly than that. One of the reasons is that the height of the skirt is higher in the second key switch 75 than in the first key switch 58.

  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 intermediate portion 75c2 have substantially straight lines. Extending upward. However, as going upward, the diameter of the horizontal cross section gradually decreases (the rate of change of the diameter is A). In the upper portion 75c1 connected to the intermediate portion 75c2, the diameter of the horizontal cross section becomes smaller (the rate of change in 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 vertical cross-sectional shape thereof has an inverted J-shape. Thus, 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 pressing forward stroke, so that the configuration is such that hysteresis occurs.

  In the skirt portion 75c, the position Z at which the rate of change in the diameter of the horizontal cross section rapidly changes 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. 7A shows the reaction force when the first key switch 58 is pressed, and FIG. 7B shows the reaction force when the second key switch 75 is pressed.

  The reaction force due to the pressing is mainly caused by the buckling of the skirt portions 58c 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 buckling of each of the bulging portions 58e, 58f, 75e, 75f of the movable contact may be positively used to generate an appropriate reaction force as a whole. In that case, speaking of the first key switch 58, either the buckling reaction force of one of the bulging portion 58e and the bulging portion 58f may be used, or the buckling reaction force of both may be used. Good.

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

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

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

  Curves SG and SB2 shown in the same figure respectively show the key pressing reaction force in the forward stroke and the return stroke of the key pressing by the present apparatus. It should be noted that a curve SB1 indicates a key-pressing reaction force in a key-return process in a conventional apparatus having no hysteresis, and a curve PB indicates a key-pressing reaction force in a key-return process in a grand piano.

  In the static touch of the present device, a substantially constant flat keying reaction force FF is generated at the initial stage of keying as shown by a curve SG. This is caused by the weight of the key 51 and the mass body 40 (including the weights FRW and BUW) (initial reaction force generating means). The flat keying reaction force FF may be generated solely by the weight of one of the key 51 and the mass body 40. Alternatively, an elastic swelling portion may be separately provided, and a key pressing reaction force FF may be generated by a reaction force of the elastic swelling portion.

  Next, when the first key switch 58 is first pressed by the key 51, a first chevron 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. Thereafter, when the second key switch 75 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 occur corresponding to t2 and t3 in FIG. 8B.

  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 in 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 by pushing up the damper of the grand piano. The magnitude, timing and mode of generation of the second chevron reaction force FM2 are set so as to approximate the key press 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 two coming off. ing. With such a setting, a key press feeling of a static touch on the grand piano is obtained in a pseudo manner in the key pressing forward stroke.

  By the way, at the time of the return of the key 51 and the mass body 40 from the rotation end position by the key depression, that is, in the return stroke of the key depression, in a conventional keyboard device which obtains let-off by elastic deformation of an elastic bulging portion such as a switch, As shown by the curve SB1, a reaction force having a peak close to the reaction force in the outward stroke occurred. For this reason, a strong key-pressing 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 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. Accordingly, at the position corresponding to the second angle reaction force FM2 in the return stroke, the curve SB2 is considerably lower than the curve SB1, and is closer to the curve PB. As a result, the key press feeling at the position corresponding to the let-off area immediately after the return from the rotation end position can be more approximated to that of the grand piano.

  According to the present embodiment, not only the same effects as in the second embodiment are exerted, but also the flatness of the first key switch 58 and the second key switch 75 due to the elastic deformation of the first key switch 58 and the second key switch 75 during the key pressing forward stroke. By generating the key pressing reaction force FF, the first angle reaction force FM1 and the second angle reaction force FM2, and appropriately setting the magnitude, generation timing, and form thereof, the static touch in the outward movement of the grand piano is performed. Can be artificially obtained.

  Also, in the let-off area, the hysteresis of the key pressing reaction force is set between the forward stroke and the return stroke, so that even at the time of rotation return, it is possible to approach the key pressing reaction force of the grand piano. In addition, 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 pressing feeling closer to that of a grand piano without complicating the configuration and taking into account the key pressing reaction force in the key return stroke.

  The head 41a of the sounding position adjusting screw 41 is configured so as to be able to come into contact with / separate from the drive unit 59 of the key 51, so that the key press feeling of the dynamic touch can also be obtained in the first embodiment. Same as the form. Further, since the first key switch 58 and the second key switch 75 also have 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 similar to the first embodiment in that a desired key pressing feel can be obtained.

  Note that both the first and second key switches 58 and 75 may be provided on the key side 1 or may be provided 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 on the mass body 40 side may be pressed first, and then the key switch on the key 51 side. In such a case, the key switch of the key 51 which is depressed later may be configured to perform the let-off function and the hysteresis function.

  Note that, similarly to the first embodiment, other configurations such as a photo sensor instead of a touch switch may be used for the first and second key switches 58 and 75.

It is a sectional view of a keyboard device concerning a 1st embodiment of the present invention. It is sectional drawing which shows the structure of the 1st switch part and the 2nd switch part in the same form. FIG. 4 is a diagram illustrating a relationship between a key stroke and a key pressing reaction force (load) at the time of key pressing in the same embodiment. It is a partial longitudinal section of a keyboard device concerning a 2nd embodiment of the present invention. It is the top view which looked at the support member in the same form from the upper part. It is a side view of the mass body in the same form. It is a sectional view showing composition of the 1st key switch and the 2nd key switch in the keyboard device concerning a 3rd embodiment of the present invention. It is a figure showing the relation between the stroke of the key switch and the reaction force (load) in the same form. FIG. 4 is a diagram illustrating a relationship between a keystroke and a key-depression reaction force (load) at the time of key depression and key release in the same embodiment. It is sectional drawing which shows schematic structure of the 1st conventional keyboard device.

Explanation of reference numerals

  DESCRIPTION OF SYMBOLS 1 Key, 1a drive part, 3 key support member, 10 mass body, 10A1 1st mass concentration part, 10A1a, 10A2a opposing surface, 10A2 2nd mass concentration part, 13a Driven part, 20 support member, 20a support part, 25 1st switch part, 26 second switch part, 25A, 26A movable part, 25B, 26B fixed part, P rotation fulcrum part, 32 rotation shaft part, 40 mass body, 41 sounding position adjustment screw, 44 abutment part, 45 bearing part, 46 head, 46a lower surface, 46b lower surface rear part, 47 tail part, 47a upper surface, 51 key, 53 key support part, 58 first key switch (first angle reaction force generating means), 59 drive part, 60 Key frame, 70 support member, 75 second key switch (second angle reaction force generating means)

Claims (1)

A key that is rotated by a key press operation,
A mass body that is driven by a key depression operation of the key and that rotates around a rotation fulcrum;
An initial reaction force generation that generates a flat key pressing reaction force at the beginning of the key rotation forward stroke by key pressing 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. Means,
An elastic bulging portion, which is pressed by any one of the key and the mass body and elastically deforms the elastic bulging portion, so that a key pressing reaction force characteristic with respect to the key stroke is a first angled reaction force. A first angle-shaped reaction force generating means for generating the key depression reaction force following the generation of the flat keying reaction force in the rotation forward stroke of the key;
An elastic bulging portion, which is pressed by any one of the key and the mass body to elastically deform the elastic bulging portion, so that a key pressing reaction force characteristic with respect to the key stroke is a second chevron reaction force. And a second angle-shaped reaction force generating means for generating the first angle-shaped reaction force following the generation of the first angle-shaped reaction force in the rotation forward stroke of the key,
The elastic swelling portion of the second chevron reaction force generating means is formed by swelling in a bowl shape from the base end, and has a high reaction force at the beginning of the pressing forward stroke, and the reaction force from the middle to the end of the pressing forward stroke. The keyboard device is characterized in that it is configured to be lower than the initial stage of the forward stroke to cause a feeling of buckling, and that the reaction force generated when the pressure is released is smaller than the reaction force generated when the pressure is released. .

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