JP2011008037A - Keyboard apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce key touch feeling approximate to a natural keyboard instrument by securing linkage between a key or a mass body and the other component intervening between them which move differently and by generating an appropriate frictional force to relative movements of both.SOLUTION: A keyboard apparatus is provide with: a key 20 pivotally supported centering on a key supporting point 12; a mass body 30 imparting a reaction force to a performance operation into the key 20 linked with the key 20; and a transmission member 46 transmitting a load from one of the key 20 and the mass body 30 to the other by abutting with both of the key and the mass body 30. An abutting part 48 on which the mass body 30 and the transmission member 46 abut is joined with an attracting force of magnet by a magnet 37 fixed to the transmission member 46 side and a metallic bearing 36 having attraction performance to the magnet 37 fixed to the mass body 30 side. The state that the mass body is contact with the transmission member 46 is kept by the attracting force of magnet, and they relatively move in company with an appropriate frictional force.

Description

  The present invention relates to a keyboard device provided in an electronic keyboard instrument and the like, and more particularly, to a keyboard device having a haptic control or operation control function for controlling operation feeling or operation of a key.

  The keyboard unit of a natural keyboard instrument that produces live sounds, such as an acoustic piano, is configured so that a hammer that rotates when a key is pressed produces a string, and a jack or wippen is provided between the key and the hammer. An action mechanism is provided. By this action mechanism, a unique reaction force is applied from the key to the performer's finger, and the keyboard unit of the natural keyboard instrument provides a key touch feeling peculiar to each instrument.

  On the other hand, the keyboard unit of an electronic keyboard instrument that generates an electronic sound is equipped with a spring and a mass body (pseudo hammer) that return the key to its initial position when the key is pressed. Simulates the feeling. However, an electronic keyboard instrument is a device that generates an electronic sound by pressing a key, and does not have a mechanism for actually striking a string to produce sound, and therefore does not have a complicated action mechanism like a natural keyboard instrument. Therefore, the key touch feeling generated by the action mechanism of the natural keyboard instrument cannot be faithfully reproduced, and the key touch feeling of the electronic keyboard instrument is strictly different from the key touch feeling of the natural keyboard instrument.

  Therefore, for electronic keyboard instruments, a key driving device and a control device (force control means) that change the reaction force against the key press have been proposed for the purpose of obtaining a key motion or key touch feeling similar to a natural keyboard instrument. . In other words, the keyboard unit described in Patent Document 1 includes an actuator (solenoid) for driving a key and a control means for controlling the actuator. It is designed to simulate the feeling of playing a keyboard instrument.

  The keyboard device of Patent Document 2 includes a mass body that simulates a hammer body of an acoustic piano, and an inertial load due to the mass body is applied as a reaction force against the key operation, and other viscous loads, elastic loads, friction It has a force control function in which a load or the like is generated by an actuator (solenoid). According to this keyboard device, it is possible to create a key touch feeling similar to an acoustic piano by the cooperation of the mass body and the actuator.

Japanese Patent No. 2956180 JP 2005-195619 A

  In the keyboard device of Patent Document 1, since the key operation is controlled only by the solenoid, it is difficult to reproduce the key touch feeling of the acoustic piano with high accuracy. In the keyboard device described in Patent Document 2, the actuator is disposed in contact with the key so as to directly apply a reaction force to the key. On the other hand, the mass body is in contact with the key and interlocked with the operation of the key, but is not in contact with the actuator, and the mass body and the actuator are arranged at positions separated from each other. However, if the mass body is arranged separately from the actuator in this way, the operation system of the mass body and the actuator becomes a separate system, so that the load on the key from the mass body can be appropriately controlled by driving the actuator. There are limits.

  Further, in a keyboard device having a key and a mass body interlocked therewith, in a transmission path for transmitting a driving force between the key and the mass body, between the key or the mass body and other components interposed therebetween. Power is transmitted with. In this transmission path, the key or mass body and other parts often perform different operations such as rotation and linear motion. In this case, in order to realize a more natural sense of movement in the force control of the key, the relative movement of the two is ensured while ensuring the interlocking between the key or mass body that operates differently and other parts interposed between them. It is necessary to configure so that an appropriate frictional force is generated. The reason for this is that the feeling of key touch by the action mechanism of an acoustic piano is created by the relative movement of components, such as spin rollers, jack bars, and hammers, with different friction. This is because it is required to reproduce the key touch feeling as faithfully as possible.

  The present invention has been made in view of the above-described points, and its purpose is to ensure the interlocking between a key or mass body that operates differently and other components interposed between them while having a simple configuration. An object of the present invention is to provide a keyboard device capable of creating a key touch feeling similar to a natural keyboard instrument by generating an appropriate frictional force with respect to the relative movement between the two.

  In order to solve the above problems, a keyboard device according to the present invention includes a key (20) supported so as to be rotatable about a fulcrum (12), and a performance operation on the key (20) in conjunction with the key (20). A mass body (30) that provides a reaction force against the mass body, and a transmission member (46) that abuts both the key (20) and the mass body (30) and transmits a load from one to the other. The contact portion (48) where the contact member (30) and the transmission member (46) contact each other includes a magnet (37) fixed to one of the mass body (30) and the transmission member (46) and the magnet fixed to the other. It is characterized by being joined by an adsorbing member (36) having adsorbability to (37). In addition, the attracting member here includes a metallic member having an adsorptivity to a magnet, other magnets, and the like.

  The keyboard device according to the present invention includes a mass body that applies a reaction force to a performance operation to the key in conjunction with the key. Therefore, it is possible to faithfully reproduce the inertial mass feeling peculiar to the key operation of a natural keyboard instrument such as an acoustic piano. Further, in the acoustic piano, it is necessary to start the movement of the key against the static load of the hammer at the time of the key press start, but the operation feeling at the time of the key press start can be reproduced well.

  In this keyboard device, the abutting portion where the mass body and the transmission member abut is joined by the magnet's adsorption force, so that when the mass body and the transmission member operate, the magnet and the adsorption member move while rubbing against each other. Thus, while the mass body and the transmission member are kept in contact with each other, their relatively free relative movement is allowed. Therefore, for example, even when the transmission member and the mass body perform different operations such as linear motion and rotation, it is possible to ensure the interlocking of the mass body and the transmission member. In addition, since the abutting portion where the mass body and the transmission member abut is joined by the magnet's attracting force, the key and the mass body move relative to each other while the mass body and the transmission member are kept in contact with each other. The structure can be realized with a simple mechanism.

  Further, in the abutting portion where the mass body and the transmitting member abut, a certain frictional force is generated by the magnetic force generated between the magnet and the attracting member that move relative to each other. As a result, it is possible to satisfactorily reproduce the key operation sensation caused by the friction generated inside the action mechanism of the acoustic piano. Therefore, for example, in the action mechanism of an acoustic piano, the key operation sensation associated with the operation in which the jack rod slides out after lifting up the spin roller, and the reaction chuck operation by back check after the hammer contacts the stopper An operation sensation similar to (back check operation) (so-called pseudo back check operation sensation) can also be obtained. In addition, since the mass body and the transmission member are joined by the magnet's attracting force, the force is transmitted between the mass body and the transmitting member as compared to the case where the mass body and the transmitting member are simply in contact without any attracting force. Will be performed with a solid and strong force. Therefore, the operation feeling of the acoustic piano can be reproduced more faithfully. In addition, since the mass body and the transmission member are joined by the magnet's attracting force, when the key returns to the initial position, the mass body is quickly brought back to the initial position by the key so that re-sounding is possible. State is formed early. Accordingly, it is possible to perform early passage performance.

  In this keyboard device, either the magnet (37) or the attracting member (36) moves in the rotational direction in accordance with the operation of the mass body (30) or the transmission member (46), and the magnet (37) Either one of the adsorbing members (36) moves in a linear direction in accordance with the operation of the transmission member (46) or the mass body (30), and the operation of the mass body (30) and the transmission member (46). Therefore, the magnet (37) and the attracting member (36) may slide. According to this, in the joint portion between the linearly moving magnet or the attracting member and the rotationally moving attracting member or the magnet, the relative degree of relative freedom is relatively high by sliding while maintaining the state where both are joined by the magnet. Movement is allowed. Accordingly, the relative movement of the mass body and the transmission member with appropriate frictional forces (static frictional force, dynamic frictional force) can be performed while ensuring the interlocking between the mass body and the transmission member. it can.

  In this keyboard device, at least one of the contact surface of the magnet (37) with respect to the attracting member (36) and the contact surface of the attracting member (36) with respect to the magnet (37) is formed in a curved surface. Good. According to this, since the contact portion between the magnet and the attracting member slides with an appropriate frictional force, the operation of the key and the operational feeling can be further improved.

In this keyboard device, the driving force applying means (40) for applying the generated driving force to the key (20) and the mass body (30), and the generation of the driving force by the driving force applying means (40) are generated. Control means (50, 53, 54) for controlling, and the driving force applying means (40) drives the transmission member (46) toward at least one of the key (20) and the mass body (30). It may be an electromagnetic actuator (40) provided with a drive source (41). According to this configuration, since the load (reaction force) applied to the key from the mass body can be appropriately controlled by the electromagnetic actuator, a key touch feeling very close to that of a natural keyboard instrument such as an acoustic piano can be easily obtained.
In addition, the code | symbol in parenthesis here has shown the code | symbol of the corresponding component of embodiment mentioned later as an example of this invention.

  According to the keyboard device of the present invention, it is suitable for the relative movement between the keys or the mass body that performs different operations and the other parts interposed between them while having a simple configuration. By generating a strong frictional force, it is possible to create a key touch feeling similar to a natural keyboard instrument.

It is a block diagram which shows the example of whole structure of the electronic keyboard instrument provided with the keyboard apparatus concerning 1st Embodiment of this invention. It is a figure which shows the keyboard apparatus of 1st Embodiment, and is a schematic side view which shows the key and the component of the periphery of it. It is a partial expanded side view which shows the detailed structure of an electromagnetic actuator and its periphery. It is a figure for demonstrating operation | movement of a key and a mass body, (a) is a state in which a key exists in a non-key-pressing position, (b) is a figure which shows the state in which a key exists in a key-pressing position. It is a figure which shows schematic structure of the keyboard apparatus containing a drive control circuit. It is a figure which shows the structural example of a force sense provision table. It is a graph which shows the relationship between the displacement (key pressing amount) of a key at the time of performing force sense control, and reaction force (load). It is a figure which shows the keyboard apparatus concerning 2nd Embodiment of this invention. It is a figure which shows the keyboard apparatus concerning 3rd Embodiment of this invention. It is a figure which shows the keyboard apparatus concerning 4th Embodiment of this invention. It is a figure which shows the keyboard apparatus concerning 5th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[First Embodiment]
FIG. 1 is a block diagram showing an overall configuration of an electronic keyboard instrument provided with a keyboard device according to a first embodiment of the present invention. The electronic keyboard instrument 1 shown in the figure controls a keyboard apparatus 10 having a plurality of keys 20 to be described later, a pedal apparatus 52, and the entire electronic keyboard instrument 1 including the keyboard apparatus 10 and the pedal apparatus 52. Main controller 50. Each part of the electronic keyboard instrument 1 such as the keyboard device 10, the pedal device 52, and the main control unit 50 is connected to each other via a bus 51.

  FIG. 2 is a diagram showing the keyboard device 10 and is a schematic side view of the key 20 and its surroundings. FIG. 3 is a partially enlarged side view showing a detailed configuration of an electromagnetic actuator 40 (to be described later) included in the keyboard device 10 and its periphery. 4A and 4B are diagrams for explaining the operation of the keyboard device 10. FIG. 4A shows a state where the key 20 is in a non-key-pressed position, and FIG. 4B shows a state where the key 20 is in a key-pressed position. Indicates the state. The keyboard device 10 includes a flat frame 11 that is a part of the electronic keyboard instrument 1, a key 20 and a mass body (pseudo hammer) 30 that are rotatably supported with respect to the frame 11, An electromagnetic actuator (driving force applying means) 40 installed between the mass bodies 30 is provided. In the following description, of the two sides of the key 20 in the longitudinal direction, the player side of the electronic keyboard instrument 1 is referred to as the front or the front, and the opposite side is referred to as the back or the rear. In FIG. 2, one key 20 and its peripheral components are shown among the plurality of keys 20 provided in parallel in the keyboard device 10. Moreover, although the case where the key 20 is a white key is shown in the same figure, the configuration is the same in the case of a black key. Although not shown, the keyboard device 10 is also provided with a switch contact mechanism for converting the operation of the key 20 into an electrical output so as to generate a musical sound according to the operation of the key 20. .

  The key 20 is supported by a key fulcrum 12 on the frame 11 at an intermediate position in the front-rear direction. The key fulcrum 12 includes a fulcrum pin 12b erected on a balance rail 12a extending along the arrangement direction of the key 20 on the frame 11, and the key 20 is supported by the fulcrum pin 12b. The front end 20a and the rear end 20b of the key 20 can be rotated in the vertical direction about the key fulcrum 12, and are rotated in response to a key pressing operation to the key pressing portion 20c by the performer. Further, a front pin 13 is erected below the front end 20 a of the key 20. The front pin 13 has an upper end inserted into the back side of the key 20 and restricts lateral deflection of the front end 20a of the rotating key 20.

  A key upper limit stopper 21 is installed below the rear end 20b of the key 20, and a key lower limit stopper 22 is installed below the front end 20a. Each of the key upper limit stopper 21 and the key lower limit stopper 22 includes a cushioning material such as felt fixed to the upper surface of the frame 11. The key upper limit stopper 21 contacts the lower surface of the rear end 20b of the key 20 at the non-key-pressing position shown in FIG. 4A, and restricts the rotation of the key 20 at the non-key-pressing position. On the other hand, the key lower limit stopper 22 contacts the lower surface of the front end 20a of the key 20 at the key pressing position shown in FIG. 4B, and restricts the rotation of the key 20 at the key pressing position.

  A columnar support portion 14 for supporting the mass body 30 is provided on the frame 11 behind the key fulcrum 12. The support unit 14 protrudes from between adjacent keys 20 on the frame 11 directly above each key 20 at a rate of one for each of a plurality of key ranges. The support portion 14 includes a front wall 14a and a rear wall 14b that are arranged forward and backward at a predetermined interval. Both the front wall 14 a and the rear wall 14 b are vertically erected and extend to a position higher than the key 20.

  The mass body 30 supported by the support portion 14 is installed corresponding to each key 20, and is installed at a position directly above the key fulcrum 12. The mass body 30 includes a straight bar-shaped shank portion 32 extending rearward from a mass body fulcrum 31 provided at the upper end of the front wall 14a of the support portion 14, and a mass portion having a predetermined mass attached to the tip of the shank portion 32 ( Weight) 33. The shank portion 32 is rotatably supported by the mass body fulcrum 31, and is rotated up and down within a vertical plane along the longitudinal direction of the key 20. The mass portion 33 is formed in a rod shape extending along the rotation direction at the tip of the shank portion 32. The mass body 30 is configured such that the mass portion 33 rotates in the vertical direction above the vicinity of the rear end of the key 20 with the shank portion 32 as an arm around the mass body fulcrum 31.

  A mass body upper limit stopper 34 and a mass body lower limit stopper 35 for restricting the rotation of the mass body 30 are provided on the rear wall 14 b of the support portion 14. The mass body lower limit stopper 35 abuts the shank portion 32 of the mass body 30 rotated to the lower limit position, and the mass body upper limit stopper 34 contacts the shank portion 32 of the mass body 30 rotated to the upper limit position. It is something to touch. With these mass body lower limit stopper 35 and mass body upper limit stopper 34, the mass body 30 has a lower limit position in which the shank portion 32 extends obliquely downward on the rear side from the mass body fulcrum 31, as shown in FIG. As shown in FIG. 4 (b), the shank portion 32 is regulated so as to rotate between the mass body fulcrum 31 and an upper limit position extending in the substantially horizontal direction on the rear side. The mass body 30 is interlocked with the operation of the key 20 via a transmission member 46 described later, and gives the key 20 a reaction force to the performance operation in cooperation with the electromagnetic actuator 40.

  An electromagnetic actuator (driving force applying means) 40 for applying a predetermined driving force to the key 20 and the mass body 30 is provided between the upper surface of the key 20 behind the key fulcrum 12 and the shank portion 32 of the mass body 30. Is installed. The electromagnetic actuator 40 is a bidirectional drive type actuator, and includes two solenoid coils, a forward coil 41a and a backward coil 41b, which are arranged side by side coaxially, and an inner side of the forward coil 41a and the backward coil 41b. And a single plunger 42 inserted and inserted into. Moreover, yokes 40a and 40b surrounding them are installed on the outer circumferences of the forward coil 41a and the backward coil 41b.

  The yokes 40a and 40b are fixed to the front surface of the rear wall 14b of the support portion 14 via the plate 15 whose rear side surface is a flat plate. Therefore, the forward coil 41a and the backward coil 41b are fixed to the support portion 14 and the frame 11 on the fixed side. The plunger 42 is connected to a barrel portion 42a made of a columnar ferromagnetic body that is slidable (reciprocating) in the vertical direction inside the forward coil 41a and the backward coil 41b, and to the upper end of the barrel portion 42a. A first rod 42b and a second rod 42c connected to the lower end are provided. The shaft portions of the body 42a, the first rod 42b, and the second rod 42c are arranged in a straight line in the vertical direction. A flat plate member 43 for fixing a position sensor 47 described later is fixed to the upper end of the first rod 42b. The plate member 43 is a relatively lightweight member made of a synthetic resin material or the like, and has a horizontal main body portion 43a fixed to the upper end of the first rod 42b, and a front side extending vertically downward from the front end of the main body portion 43a. 43b and has a substantially L-shaped cross section.

  A base member 44 having a horizontal upper surface is fixed to the upper surface of the main body 43 a of the plate member 43. A magnet (permanent magnet) 37 is fixed to the upper surface of the base member 44. The magnet 37 is a small member formed in a substantially flat plate shape. On the other hand, a bearing (attracting member) 36 having magnetic attraction with respect to the magnet 37 is fixed at a position facing the base member 44 in the shank portion 32 of the mass body 30. The bearing 36 is a substantially hemispherical small member made of a metal material fixed to the lower surface of the shank portion 32. The bearing 36 is joined to the magnet 37 by magnetic attraction.

  The strength of the attraction force by the magnetic force between the bearing 36 and the magnet 37 is preferably as follows. That is, when the key 20 and the mass body 30 are performing a normal operation, the first contact portion 48 is always joined, and the transmission member 46 is in contact with the mass body 30 to be integrated. Although it is configured to operate, when the key 20 is suddenly depressed with a strong force, or when the key 20 is depressed or released at a very high speed, the acceleration generated in the transmission member 46 and the acceleration generated in the mass body 30 If the directions are different from each other, it is preferable that the joint between the bearing 36 and the magnet 37 is instantaneously separated to a certain degree.

  A cap-like cover member 45 having a buffering and sliding action is attached to the lower end of the second rod 42c of the plunger 42, and a screw (on the upper surface of the key 20 facing the lower end of the cover member 45) Screw) 25.

  The plunger 42 (the trunk 42a, the first rod 42b, the second rod 42c), the plate member 43, the base member 44, and the magnet 37, and a load (load due to mass) from either the key 20 or the mass body 30. A transmission member 46 is configured to transmit a load or an inertial load accompanying a rotation operation) to the other. The transmission member 46 is disposed in a state of being sandwiched between the mass body 30 and the key 20 by a load due to the weight of the mass body 30.

  The electromagnetic actuator 40 is configured to drive the transmission member 46 (plunger 42) in both directions when a drive current is supplied to the forward coil 41a and the backward coil 41b. That is, when a drive current is supplied to the return coil 41b, the transmission member 46 moves downward. As a result, a downward load is applied from the transmission member 46 to the rear side of the key fulcrum 12 of the key 20, so that the load applied in the key release direction of the key 20 increases. On the other hand, when a drive current is supplied to the forward movement coil 41a, the plunger 42 moves upward. Thereby, since the load applied downward from the plunger 42 to the rear side of the key fulcrum 12 of the key 20 is reduced, the load applied in the key release direction of the key 20 is reduced.

  That is, the key 20 is urged in the key release direction by a load applied by the mass body 30 (load due to the mass of the mass body 30) via the transmission member 46, and the key 20 is urged by the electromagnetic actuator 40. It is configured to rotate in the key-pressing direction as the load from the head is reduced. In this case, when the key 20 is not pressed, since the load in the key release direction from the mass body 30 is greater than the biasing force in the key pressing direction due to its own weight, the biasing force in the key pressing direction is canceled out. Stopped at the key release position. As the load from the mass body 30 due to the driving force of the electromagnetic actuator 40 is reduced, the biasing force in the key pressing direction due to the weight of the key 20 gradually becomes larger than the load from the mass body 30 in the key release direction. Therefore, it is rotated to the key pressing position.

  Here, the key 20 and the mass body 30 rotate around the key fulcrum 12 and the mass body fulcrum 31, respectively, while the transmission member 46 (plunger 42) moves between the forward coil 41a and the backward coil 41b. Performs linear motion in the axial direction on the inside. Therefore, when the key 20, the mass body 30, and the transmission member 46 operate integrally, the first contact portion 48 where the magnet 37 on the transmission member 46 side and the bearing 36 on the mass body 30 side abut on each other, A magnet 37 that linearly moves up and down according to the operation of 46 moves in sliding contact with the bearing 36 that rotates with the operation of the mass body 30. Similarly, at the second contact portion 49 where the lower end of the transmission member 46 and the screw 25 of the key 20 are in contact, the lower end of the transmission member 46 that moves linearly up and down rotates with the operation of the key 20. It slides and moves with respect to the upper surface.

  Further, the keyboard device 10 is provided with a position sensor (operation detecting means) 47 for detecting the position of the transmission member 46 (plunger 42). As shown in FIG. 3, the position sensor 47 includes a light receiving portion 47 a provided on the front side surface of the yokes 40 a and 40 b and a reflecting surface 47 b provided at a position facing the light receiving portion 47 a on the front side 43 b of the plate member 43. And a reflection type sensor configured to receive light reflected by the reflection surface 47b by the light receiving unit 47a. The reflection surface 47b is configured such that the amount of reflected light at each position in the vertical direction changes continuously. Therefore, the position of the transmission member 46 can be uniquely specified based on the output signal of the light receiving portion 47a.

  As long as the position sensor 47 can detect the position of the transmission member 46 (plunger 42), besides the reflective sensor as described above, although not shown, an optical sensor having another configuration, A sensor other than an optical sensor may be used. Further, instead of the position sensor 47, a position detection switch or the like may be installed. Further, here, a position sensor 47 for detecting the position is provided as an example of the operation detecting means for detecting the operation of the transmission member 46, but other speeds for detecting the speed, acceleration, etc. of the transmission member 46 are also provided. It is also possible to install one of a sensor and an acceleration sensor, or a plurality of these.

  Here, the operation (displacement, speed, etc.) of the transmission member 46 is detected, and the drive control of the electromagnetic actuator 40 is performed based on the detection result. However, in addition to this, an operation detection unit that detects the operation (position, velocity, acceleration, etc.) of the key 20 or the mass body 30 is provided, and based on the operation of the key 20 or the mass body 30 detected by the operation detection unit. The drive control of the electromagnetic actuator 40 may be performed. Furthermore, one or a plurality of motion detection means for detecting the motion of at least one of the transmission member 46, the key 20, and the mass body 30 is provided, and any one of the one or the plurality of motion detection means is used for driving control of the electromagnetic actuator 40. It is also possible to use other motion detection means for sound generation control of the electronic sound source. Of course, it is possible to use one motion detection means for both drive control and sound generation control.

  Thus, the keyboard device 10 of the present embodiment is arranged between the mass body 30 rotatably installed above the key 20, and between the key 20 and the mass body 30, and the generated driving force is transferred to the key 20 and An electromagnetic actuator 40 and a transmission member 46 are provided for the mass body 30. The electromagnetic actuator 40 and the transmission member 46 are disposed between the mass body 30 and the portion of the key 20 opposite to the key pressing portion 20 c with respect to the key fulcrum 12. Further, the electromagnetic actuator 40 is composed of a single device capable of applying a driving force in both directions of the direction toward the mass body 30 and the direction toward the key 20 by driving the transmission member 46.

  Next, the main controller 50 shown in FIG. 1 will be described. The main control unit 50 includes a CPU 51, a ROM 52, a RAM 53, and a flash memory (EEPROM) 54. A timer 55 is connected to the CPU 51. The CPU 51 controls the entire electronic keyboard instrument 1 including the keyboard device 10. The ROM 52 and the flash memory 54 store a haptic application table 80 and automatic performance data 85, which will be described later, in addition to a control program executed by the CPU 51 and various table data. The RAM 53 temporarily stores various input information such as performance data and text data, various flags, buffer data, and arithmetic processing results. The timer 55 measures various times such as an interrupt time in the timer interrupt process.

  In addition to the main control unit 50, the electronic keyboard instrument 1 includes a setting operation unit 61, a display device 63, an audio output unit 65, an external storage device 66, an HDD 67, a communication interface 68, a MIDI interface 69, and the like. . An external device 71 can be connected to the communication interface 68, and a MIDI device 72 can be connected to the MIDI interface 69. The communication interface 68 can communicate with an external server device 74 via a communication network 73 such as the Internet. The setting operation unit 61 includes various switches (not shown) used by the performer to input setting operation information, and a signal generated by the operation of the switch is supplied to the CPU 51. The external storage device 66 and the HDD 67 store various application programs including the above control program, various music data, and the like. The display device 63 is connected to the bus 51 via the display control circuit 62, and the audio output unit 65 is connected to the bus 51 via the sound source circuit 64.

  FIG. 5 is a diagram showing a schematic configuration of the keyboard device 10 including a drive control circuit for controlling the drive of the key 20. As shown in the figure, the drive control circuit of the keyboard device 10 includes a PWM for driving the main control unit 50 and the forward coil 41a or the return coil 41b of the electromagnetic actuator 40 in accordance with a command from the main control unit 50. A control driver 58 and a PWM switching circuit 59 for outputting a (pulse width modulation) signal are provided. The main control unit 50 is configured as shown in FIG. 1 and includes a ROM 52 that stores a force sense imparting table 80 and automatic performance data 85. The position information of the plunger 42 detected by the position sensor 47 is output to the main control unit 50. A control signal from the main control unit 50 is input to the control driver 58 and the PWM switching circuit 59. The control driver 58 and the PWM switching circuit 59 supply a drive current to the forward coil 41a or the backward coil 41b of the electromagnetic actuator 40 based on a control signal from the main control unit 50.

  FIG. 6 is a diagram illustrating a configuration example of the force sense imparting table 80 stored in the ROM 52. The force sense imparting table 80 is a table that stores patterns of driving force that the electromagnetic actuator 40 should generate. Further, a key pressing table 81 and a key releasing table 82 are prepared for the force sense imparting table 80. The key pressing table 81 and the key releasing table 82 include reaction force pattern tables 81a and 82a and command value tables 81b and 82b, respectively. The reaction force pattern tables 81a and 82a are tables for referring to output values for signals of detection values of the position sensor 47 (or values such as speed and acceleration of the transmission member 46 calculated from the detection values). The command value tables 81b and 82b are tables for referring to command values for causing the control driver 58 and the PWM switching circuit 59 to generate the output values.

  Next, the operation of the keyboard apparatus 10 having the above configuration will be described. The key 20 is acted on by the key pressing force due to the magnitude relationship between the biasing force in the key pressing direction generated by the mass (self-weight) balance before and after the key fulcrum 12 and the load from the mass body 30 via the transmission member 46. In the state where it is not, the lower surface of the rear end 20b is in contact with the key upper limit stopper 21, and the key pressing portion 20c of the front end 20a is raised to the uppermost position, and is in the non-key pressing position shown in FIG. At this time, the mass body 30 is in the lower limit position where the shank portion 32 contacts the mass body lower limit stopper 35. On the other hand, when the key 20 in the non-key pressing position is pressed, the key 20 rotates in the key pressing direction about the key fulcrum 12 while pushing up the mass body 30 via the transmission member 46. In this way, the lower surface of the front end 20a is rotated to a position where it comes into contact with the key lower limit stopper 22, and the key pressing position shown in FIG. When the key 20 is in the key depression position, the mass body 30 pushed up by the key 20 via the transmission member 46 is in the upper limit position where the shank portion 32 contacts the mass body upper limit stopper 34. When the key pressing force on the key 20 is released, a load is applied to the key 20 from the mass body 30 that rotates downward by its own weight via the transmission member 46. The key 20 returns to the non-key-pressed position by both this load and its own weight balance.

  When the key 20 is operated using the inertial mass of the mass body 30, the electromagnetic actuator 40 drives the transmission member 46 in both directions, thereby assisting the biasing force applied to the key 20 from the mass body 30. Or it can be reduced. Therefore, by controlling the driving of the electromagnetic actuator 40 by the main control unit 50, it is possible to perform force sense control of the reaction force with respect to the key pressing operation.

  The force sense control for the key pressing operation will be further described. In the keyboard device 10 of the present embodiment, the plunger 42 is moved by the electromagnetic actuator 40 when the electronic keyboard instrument 1 is played in order to reproduce a unique key touch feeling (resistance feeling) felt by the finger based on the action mechanism of the acoustic piano. By driving the key 20, a reaction force characteristic corresponding to the key touch feeling of the acoustic piano is imparted to the key 20. This reaction force characteristic changes every moment depending on the position of the key 20. Therefore, when performing the force sense control, the driving force is applied based on the position information of the transmission member 46 detected by the position sensor 47. That is, first, data detected by the position sensor 47 is output to the main control unit 50. The main control unit 50 issues a command to the control driver 58 and the PWM switching circuit 59 by referring to the position information of the plunger 42 based on the detection data of the position sensor 47 and the force sense application table 80 stored in the ROM 52. . In the control driver 58 and the PWM switching circuit 59, the drive current is supplied to the forward coil 41a or the backward coil 41b based on a command from the main control unit 50. Thus, the driving force to the mass body 30 side or the key 20 side is applied to the transmission member 46 by driving the forward coil 41a or the backward coil 41b. Here, the case where the driving force of the electromagnetic actuator 40 is determined with reference to the force sense application table 80 has been described, but the transmission member 46 detected by the position sensor 47 without referring to the force sense provision table 80. The driving force at the electromagnetic actuator 40 may be determined by calculation from the position information.

  FIG. 7 is a graph showing the relationship between the displacement (key pressing amount) of the key 20 and the reaction force applied to the finger that performs the key pressing operation from the key 20 when force sense control by the electromagnetic actuator 40 is performed. ), (B) are reaction force distributions when the key 20 is pressed / released relatively slowly, and (c), (d) are the key press / release keys relatively quickly. Reaction force distribution when operated.

  In the force sense control of the key 20 in the keyboard device 10 of the present embodiment, the reaction force L1 due to the mass of the mass body 30 applied to the key 20 or the inertial load and the reaction force L2 applied to the key 20 by the electromagnetic actuator 40 are combined. The dotted line (the one-dot chain line in FIG. 7) is the reaction force applied to the finger of the performer who performs the key pressing operation. The distribution of the reaction force applied to the player's finger is due to the cooperation between the reaction force L1 of the mass body and the reaction force L2 applied by the electromagnetic actuator 40, thereby reproducing the reaction force distribution of the acoustic piano. It has become a thing.

  Here, the distribution of the reaction force with respect to the operation of the key 20 will be described in detail. First, the case where the key pressing operation is performed relatively slowly as shown in FIG. 7A will be described as an example. In this case, the reaction force applied to the finger of the performer who performs the key pressing operation starts from the initial value (zero load) when the key pressing amount is zero, in the areas A, B, C, and D described below. The distribution includes changes at four locations.

  Region A is a reaction force distribution due to a static load when lifting of the key 20 and the mass body 30 in a stationary state is started in the initial stage of key depression. In the initial stage of key pressing, the plunger 42 is not yet driven by the electromagnetic actuator 40, and only the reaction force from the mass body 30 acts on the key 20. This region A is due to the static load of the key 20 and the mass body 30 in a stationary state, but even in the reaction force characteristic against the key depression of the acoustic piano, the same distribution is obtained by lifting the key and the hammer at the initial stage of the key depression. Appears. Region B is a reaction force distribution when the driving of the plunger 42 by the electromagnetic actuator 40 is started. In this area B, the reaction force applied to the key when the damper is started to be lifted by the key is reproduced by the action mechanism of the acoustic piano.

  Region C is a reaction force increase slightly smaller than region B, and is a reaction force distribution created by driving the electromagnetic actuator 40. In region C, the reaction force (so-called action spring load) applied to the key is reproduced by the operation of each part of the action mechanism while the acoustic piano is being depressed. Region D is a mountain-shaped distribution with a rapid and large increase and decrease in reaction force created by driving the electromagnetic actuator 40. In this region D, a sudden change in the load applied to the key as the jack is removed from the so-called jack-fitted state in the action mechanism of the acoustic piano is reproduced. It should be noted that the reaction force L1 applied to the key 20 from the mass body 30 after the region D suddenly increases again. This is the reaction force that the mass body 30 receives from the mass body upper limit stopper 34 or the key 20 receives the key lower limit. This is due to the reaction force received from the stopper 22.

  Further, the reaction force distribution of the relatively slow key release operation shown in FIG. 7B does not have a reaction force corresponding to the jack fitting / jack unloading load in the region D. This is the same as in the case of the key pressing operation in a). Also in this case, the reaction force distribution for the key operation of the acoustic piano is reproduced. Further, in the reaction force distribution of the relatively fast key pressing operation shown in FIG. 7C, the reaction force L1 due to the mass body 30 in the initial stage of key pressing is a mountain-shaped distribution with a sudden and large increase / decrease. This is due to a large static load generated when the key 20 and the mass body 30 in a stationary state are suddenly moved. Further, in this relatively fast key pressing operation, almost no reaction force corresponding to the jack-out load of the acoustic piano appears. These points are distributed in the same manner even when the keys of the acoustic piano are operated. Further, in the relatively quick key release operation shown in FIG. 7 (d), the reaction force L1 by the mass body 30 is almost constant at a small value, and occurs when each part of the action mechanism returns to the initial position on the acoustic piano. The reaction force is reproduced by the reaction force L2 generated by the electromagnetic actuator 40. As a result, the distribution approximates the reaction force distribution of the relatively slow key release operation shown in FIG.

  As described above, in the keyboard device 10 of the present embodiment, an acoustic piano having a complex action mechanism is synthesized by a reaction force obtained by combining the reaction force L1 generated by the mass body 30 and the reaction force L2 generated by the electromagnetic actuator 40. The distribution of the reaction force applied to the finger with respect to the key operation is faithfully reproduced.

  On the other hand, in the keyboard device 10, the electromagnetic actuator 40 drives the transmission member 46 in the direction opposite to the direction in which the reaction force against the key pressing is applied to the key 20 (in this case, upward), thereby releasing the key 20. The force acting in the key direction can be reduced. Therefore, if the transmission member 46 is driven upward by the electromagnetic actuator 40 in a state in which the player has not operated the key 20 and the key 20 is stopped at the non-pressed position, the key 20 is weighted. It turns in the key pressing direction. If this operation is used, the key 20 can be automatically operated without the key pressing operation by the performer. Therefore, the electronic keyboard instrument 1 can perform an automatic performance with an automatic operation (unmanned operation) of the key 20.

  In this automatic performance, based on the automatic performance data 85 stored in the ROM 52, a command relating to automatic performance is issued from the main control unit 50 to the control driver 58 and the PWM switching circuit 59. The control driver 58 and the PWM switching circuit 59 supply driving current to the forward coil 41a based on the command. As a result, the transmission member 46 moves upward (to the mass body 30 side) by driving the forward movement coil 41a, and the key 20 rotates to the key pressing position. On the other hand, if the supply of the drive current to the forward movement coil 41a is stopped, the plunger 42 moves downward (key 20 side) by the load from the mass body 30. As a result, a load in the key release direction is applied from the plunger 42 to the key 20, and the key 20 rotates to the key release position. By performing such an operation at a timing according to the operation information of the key 20 based on the automatic performance data 85, it is possible to cause the key 20 to perform an operation that matches the performance sound.

  As described above, the keyboard device 10 according to the present embodiment includes the mass body 30 that provides the reaction force to the performance operation to the key 20 in conjunction with the key 20. Therefore, it is possible to faithfully reproduce the inertial mass feeling peculiar to the key operation of a natural keyboard instrument such as an acoustic piano. Further, in the acoustic piano, it is necessary to start the movement of the key against the static load of the hammer at the time of the key press start, but the operation feeling at the time of the key press start can be reproduced well.

  In the keyboard device 10, the first abutting portion 48 where the mass body 30 and the transmission member 46 abut is attached to the bearing 36 fixed to the mass body 30 side, and the magnet 37 fixed to the transmission member 46 side. It is joined with. As described above, when the mass body 30 and the transmission member 46 operate by moving the contact portion between the mass body 30 and the transmission member 46 by the magnet's attracting force, the magnet 37 and the bearing 36 move while rubbing against each other. As a result, the mass body 30 and the transmission member 46 are allowed to move relatively freely while maintaining a state in which they are in contact with each other. Therefore, in the keyboard device 10, it is possible to ensure the interlocking between the mass body 30 that performs different operations (rotation and linear movement) and the transmission member 46. In addition, since the mass body 30 and the transmission member 46 are joined with an attractive force of a magnet, when the mass body 30 operates, the mass body 30 and the transmission member 46 are kept relatively in contact with each other while maintaining the contact state. The moving structure is realized with a simple mechanism.

  Further, in the first abutting portion 48 where the mass body 30 and the transmission member 46 abut, a constant frictional force is generated in the relatively moving magnet 37 and the bearing 36 due to the magnetic force generated therebetween. Therefore, it is possible to satisfactorily reproduce the key operation sensation caused by the friction generated inside the action mechanism of the acoustic piano. Thereby, for example, in an action mechanism of an acoustic piano, an operation feeling (so-called pseudo back check operation feeling) similar to a reaction chuck operation (back check operation) after the hammer contacts the stopper member can be obtained.

  In addition, since the mass body 30 and the transmission member 46 are joined by the magnet's adsorption force, the mass body 30 and the transmission member 46 are compared with the case where the mass body 30 and the transmission member 46 are merely in contact with each other without the adsorption force. The power is transmitted with a strong and strong force. Therefore, the operation feeling of the acoustic piano can be reproduced more faithfully. Further, since the mass body 30 and the transmission member 46 are magnetically joined, when the key 20 returns to the initial position, the mass body 30 is quickly brought back to the initial position by the key 10, so that re-sounding is possible. Possible states are formed early. Accordingly, it is possible to perform early passage performance.

  Further, in the keyboard device 10, the bearing 36 fixed to the mass body 30 side moves in the rotation direction in accordance with the operation of the mass body 30, while the magnet 37 fixed to the transmission member 46 side operates in the operation of the transmission member 46. Accordingly, it moves in a linear direction, and the joint portion between the bearing 36 and the magnet 37 slides by the operation of the mass body 30 and the transmission member 46. Accordingly, at the joint portion between the magnet 37 on the transmission member 46 side that moves linearly and the bearing 36 on the mass body 30 side that rotates, the two portions are kept joined by a magnetic force, and a relatively high degree of freedom is achieved by sliding. High relative movement is allowed. Accordingly, the relative movement between the mass body 30 and the transmission member 46 with appropriate frictional force (static frictional force, dynamic frictional force) can be achieved while ensuring the interlocking between the mass body 30 and the transmission member 46. Can be good.

  In the keyboard device 10 according to the present embodiment, the contact surface of the bearing 36 with respect to the magnet 37 is formed in a curved surface having a spherical surface. Thereby, since the joining location of the bearing 36 and the magnet 37 comes to slide with an appropriate frictional force, the operation and operation feeling of the key 20 can be further improved.

[Second Embodiment]
Next, a keyboard device 10 according to a second embodiment of the present invention will be described. In the description of the second embodiment and the corresponding drawings, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted below. In addition, matters other than those described below are the same as those in the first embodiment. These points are the same for the other embodiments.

  FIG. 8 is a diagram showing a configuration of a keyboard device 10-2 according to the second embodiment of the present invention, and is a partially enlarged side view showing a detailed configuration of the electromagnetic actuator corresponding to FIG. 3 of the first embodiment and its periphery. is there. In the keyboard device 10-2 shown in the figure, a magnet 37 is fixed on the mass body 30 side, and a bearing 36 is fixed on the transmission member 46 side. That is, the bearing 36 is fixed to the upper surface of the base member 44, and the magnet 37 is fixed to the shank portion 32 of the mass body 30. Also in the keyboard device 10-2, the first abutting portion 48 where the transmission member 46 and the mass body 30 abut is joined by the attracting force of the magnet 37 and the bearing 36. Both the bearing 36 and the magnet 37 have the same shape as that shown in FIG. Although not shown, the shapes of the magnet 37 and the bearing (adsorption member) 36 can be interchanged. Furthermore, instead of the above-described configuration, it is possible to fix the magnets on both the mass body 30 side and the transmission member 46 side and join the contact portions of the two with the attraction force between the magnets.

[Third Embodiment]
Next, a keyboard apparatus according to a third embodiment of the present invention will be described. FIG. 9 is a diagram showing a configuration of a keyboard device 10-3 according to the third embodiment of the present invention. The keyboard apparatus 10-3 shown in the figure includes a unidirectional drive type electromagnetic actuator 40-3 instead of the bidirectional drive type electromagnetic actuator 40 provided in the keyboard apparatus 10 of the first embodiment. Other configurations are the same as those of the keyboard device 10 of the first embodiment. That is, the electromagnetic actuator 40-3 includes a single coil 41 and a single plunger 42 arranged inside the coil 41. The electromagnetic actuator 40-3 moves the plunger 42 only downward (key 20 side) by driving the coil 41. Although not shown, the drive control circuit included in the keyboard device 10-3 according to the present embodiment includes a configuration for controlling the driving of the electromagnetic actuator 40-3 including the single coil 41.

In this keyboard apparatus 10-3, the electromagnetic actuator 40-3 drives the transmission member 46 downward (on the key 20 side), whereby the mass of the mass body 30 applied to the key 20 or the reaction force due to the inertial load and the electromagnetic actuator 40 The combination of the reaction force applied to the key 20 at -3 is the reaction force applied to the finger of the performer who performs the key pressing operation. Accordingly, a reaction force distribution similar to that shown in FIG. 7 in the first embodiment can be created, and force sense control for the performance operation of the key 20 can be performed.

  According to the keyboard device 10-3 of the present embodiment, the configuration of the keyboard device 10-3 is simpler than that of the keyboard device 10 of the first embodiment by including the unidirectionally driven electromagnetic actuator 40-3. And drive control can be facilitated. Therefore, the keyboard device 10-3 according to the present embodiment is suitable for application to an electronic keyboard instrument having a simpler configuration or an inexpensive electronic keyboard instrument than the keyboard device 10 according to the first embodiment.

[Fourth Embodiment]
Next, a keyboard device according to a fourth embodiment of the present invention will be described. FIG. 10 is a diagram conceptually showing the configuration of the keyboard apparatus 10-4 of the fourth embodiment. Compared with the keyboard device 10 of the first embodiment, the keyboard device 10-4 of the present embodiment has a reverse relationship in the arrangement of the key 20 and the mass body 30, and accordingly, the key 20 and the mass body 30. The direction of the electromagnetic actuator 40 installed between the two is also reversed upside down. The operation directions of the key 20, the mass body 30, and the electromagnetic actuator 40 are also reversed.

  That is, in the keyboard device 10-4 of the present embodiment, the mass body 30 is installed on the lower side of the key 20, and the electromagnetic actuator 40 and the transmission member 46 are disposed between the lower surface of the key 20 and the mass body 30. ing. The upper end of the second rod 42c extending upward is in contact with the lower surface of the key 20 on the front side (the same side as the key pressing portion 20c) with respect to the key fulcrum 12, and the transmission member 46 is fixed to the first rod 42b extending downward. The lower end of the pedestal member 44 is in contact with the upper surface of the shank part 32 extending to the opposite side of the mass part 33 with respect to the mass support point 31.

  In the keyboard device 10 of the first embodiment, the key 20, the electromagnetic actuator 40 and the transmission member 46, and the mass body 30 in this order from the lower side on the opposite side (rear side) to the key pressing portion 20 c with respect to the key fulcrum 12 of the key 20. On the other hand, in the keyboard device 10-4 of the present embodiment, the key 20, the electromagnetic actuator 40, and the transmission member from the upper side on the same side (front side) as the key pressing portion 20c with respect to the key fulcrum 12 of the key 20 are arranged. 46 and the mass body 30 are arranged in this order.

  Also in the keyboard device 10-4 of the present embodiment, the key 20 is pressed by both the weight balance before and after the key fulcrum 12 and the load from the mass body 30 via the transmission member 46. In the absence state, as shown in FIG. At this time, the mass body 30 is in the lower limit position in contact with the mass body lower limit stopper 35. When the key pressing operation is performed, the key 20 rotates while pushing down the shank portion 32 of the mass body 30 via the transmission member 46. Thus, the key 20 becomes a key pressing position where the lower surface of the front end 20a abuts against the key lower limit stopper 22. The mass body 30 rotated by being pushed down by the key 20 via the plunger 42 comes into contact with the mass body upper limit stopper 34 and reaches the upper limit position when the key 20 is in the key depression position. On the other hand, when the key pressing force that pushes down the key 20 is released, a load is applied to the key 20 from the rotating mass body 30 via the transmission member 46. The key 20 returns to the non-key-pressed position with both this load and its own weight balance.

[Fifth Embodiment]
Next, a keyboard apparatus according to a fifth embodiment of the present invention will be described. FIG. 11 is a diagram illustrating a configuration of a keyboard device 10-5 according to the fifth embodiment. The mass body 30 included in the keyboard device 10 of the first embodiment has only a function of applying an inertial force to the operation of the key 20 and does not actually strike a string, but the keyboard device of the present embodiment. A hammer (mass body) 90 included in 10-5 has a function of actually striking a string and generating a sound like an acoustic piano. That is, the hammer 90 has a configuration similar to that of a hammer included in an acoustic piano, and includes a linear bar-shaped shank portion 92 extending rearward from a hammer fulcrum 91 provided at the upper end of the front wall 14a of the support portion 14, and the shank portion 92. And a string-striking body 93 attached to the tip. The string-striking body 93 has a predetermined mass. The shank portion 92 is rotatably supported by the hammer fulcrum 91 and is configured to rotate up and down within a vertical plane along the longitudinal direction of the key 20. The hammer 90 is configured such that a string hitting body 93 rotates in the vertical direction above the vicinity of the rear end of the key 20 with a shank portion 92 as an arm around a hammer fulcrum 91.

  A hammer lower limit stopper 95 for restricting the rotation of the hammer 90 is provided on the rear wall 14 b of the support portion 14. The hammer lower limit stopper 95 abuts the shank portion 92 of the hammer 90 rotated to the lower limit position. On the other hand, the string 96 is struck by the stringed body 93 of the hammer 90 rotated to the upper limit position. Further, a damper 97 for suppressing the vibration of the string 96, a damper wire 98 and a damper block 99 for moving the damper 97 up and down, and the like are also installed. When the damper block 99 is lifted at the rear end of the key 20 rotated to the key pressing position, the damper 97 is lifted via the damper wire 98 and is separated from the string 96.

  Also in this keyboard apparatus 10-5, the hammer 90 is interlocked with the operation of the key 20 through the transmission member 46 joined by the magnet 37 and the bearing 37. The reaction force to the performance operation is given to 20. In the keyboard device 10-5, the string 96 is struck and sounded by the operation of the hammer 90 accompanying the key depression. Therefore, it is possible to omit installation of an electronic sound source that generates sound in response to a key press. In the keyboard device 10-5, although not shown, a stopper mechanism that holds the key 20 in a non-key-pressing position may be provided. According to this, when the transmission member 46 is driven by the electromagnetic actuator 40, the key 20 can be stopped at the non-key pressing position by the stopper mechanism. As a result, only the hammer 90 can be driven in a state where the load of the key 20 is not applied, and only sound generation by string striking can be performed. Therefore, it is possible to efficiently perform automatic performance of only the performance sound without the operation of the key 20 with less energy.

  In the keyboard device 10-5 of the present embodiment, the hammer 90 and the transmission member 46 are joined by the magnet's attracting force, so that the hammer 90 does not have to be provided with parts corresponding to the back check of the acoustic piano. When returning to the initial position, it is possible to prevent the hammer 90 from bouncing back due to the reaction against the hammer lower limit stopper 95. That is, the hammer 90 and the transmission member 46 are joined by the magnet's attracting force, so that in the action mechanism of the acoustic piano, it is approximate to the reaction chuck operation (back check operation) by the back check after the hammer contacts the stopper. A sense of movement (so-called pseudo back check movement sensation) can be obtained. Therefore, the operation feeling of the acoustic piano can be reproduced more faithfully while omitting the parts corresponding to the back check for regulating the behavior of the hammer 90 and simplifying the configuration of the keyboard device 10-5.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. For example, the specific shapes and the like of the magnet and the attracting member provided in the keyboard device of the present invention are not limited to those shown in the above embodiment, and may be other shapes.

  Moreover, in each said embodiment, although the mass body 30 is comprised so that it may rotate centering on the mass body fulcrum 31, operation | movement of the mass body with which the keyboard apparatus of this invention is provided is limited to rotation. Instead, it may be configured to perform linear motion or other operations. Further, the arrangement relationship of the key, the transmission member, and the mass body is not limited to the arrangement in the vertical direction as shown in the above embodiment. Therefore, for example, although detailed illustration is omitted, a key and a mass body are arranged side by side in a horizontal direction, a transmission member is arranged therebetween, and the operation of the key is laterally directed toward the mass body via the transmission member. It can also be configured to be transmitted in the direction. In this case, the mass body may be configured to rotate or may be configured to move linearly.

DESCRIPTION OF SYMBOLS 1 Electronic keyboard instrument 10 Keyboard apparatus 12 Key fulcrum 20 Key 21 Key upper limit stopper 22 Key lower limit stopper 30 Mass body 31 Mass body fulcrum 32 Shank part 33 Mass part 34 Mass body upper limit stopper 35 Mass body lower limit stopper 36 Bearing (adsorption member)
37 Magnet 40 Electromagnetic actuator 41 Coil 41a Forward coil 41b Reverse coil 42 Plunger 46 Transmission member 47 Position sensor 48 First contact portion 49 Second contact portion 50 Main control portion 58 Control driver 59 PWM switching circuit 80 Force sense Table 85 Automatic performance data

Claims (4)

A key supported to be pivotable around a fulcrum;
A mass body that gives a reaction force to a performance operation to the key in conjunction with the key;
A transmission member that abuts both the key and the mass body and transmits a load from one to the other;
With
The abutting portion where the mass body and the transmission member abut is joined by a magnet fixed to one of the mass body and the transmission member, and an adsorbing member fixed to the other and having an adsorptivity to the magnet. A keyboard device characterized by that. One of the magnet and the attracting member moves in the rotational direction in accordance with the operation of the mass body or the transmission member, and the other of the magnet and the attracting member is the transmission member or the mass body. As it moves, it moves in a straight line direction,
The keyboard apparatus according to claim 1, wherein the magnet and the attraction member slide by the operation of the mass body and the transmission member. The keyboard device according to claim 1, wherein at least one of a contact surface of the magnet with respect to the attraction member and a contact surface of the attraction member with respect to the magnet is formed in a curved surface shape. . Driving force applying means for applying the generated driving force to the key and the mass body;
Control means for controlling the generation of the driving force in the driving force applying means,
The said drive force provision means is an electromagnetic actuator provided with the drive source which drives the said transmission member toward at least any one of the said key and the said mass body, The Claim 1 thru | or 3 characterized by the above-mentioned. Keyboard equipment.

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