JP5471661B2 - Keyboard device - Google Patents

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 functions of force sense control and operation control for controlling operation feeling or operation of a key.

  For electronic keyboard instruments such as an electronic piano, a drive or control device (force control means) that changes the reaction force against the key press is used to obtain a key movement or key touch feeling similar to that of a natural keyboard instrument such as an acoustic piano. The ones provided are proposed. As an electronic keyboard instrument provided with such a drive device, there is an electronic keyboard instrument described in Patent Document 1. The electronic keyboard instrument described in Patent Document 1 includes a bidirectionally driven electromagnetic actuator, and the key is bidirectionally driven by a plunger of the electromagnetic actuator. As a result, both haptic control and automatic performance (automatic key operation) for key pressing operations are possible.

  The keyboard device described in Patent Document 1 includes a key that is rotatably installed around a fulcrum, and the tip of a plunger of an electromagnetic actuator is in contact with the lower surface of the key. A plate spring that urges the key in the key-pressing direction is installed at the top of the key, and a plate spring that urges the plunger and the key together in the key-release direction is installed at the lower end of the plunger. Has been. Therefore, the urging force of these two leaf springs urges the key in both the key pressing direction and the key releasing direction to balance the rest position. Further, the state in which the tip of the plunger is in contact with the lower surface of the key is maintained by the urging force of the two leaf springs. Thereby, not only when the plunger moves toward the key, but also when the plunger moves away from the key, the state where the key and the plunger are in contact with each other can always be maintained. Therefore, even when the key moves toward either the end position (key pressing position) or the rest position (key release position), the key can follow the operation of the plunger.

  However, in the structure shown in Patent Document 1, since two springs are installed above and below the key, there is a risk that the structure of the keyboard device becomes complicated and the cost increases due to an increase in the number of parts. Further, since the biasing force of the spring is applied to the key, the operation of the key is influenced by the biasing force of the spring. Therefore, there is also a problem that the key operation and the touch feeling are different from those of a natural keyboard instrument.

  In addition to the keyboard device described in Patent Document 1, a key supported so as to be pivotable about a fulcrum and the performance of the key in conjunction with the key by urging the key in the key release direction. A keyboard instrument having a configuration in which a mass body (hammer) for applying a reaction force to the operation is provided, and a bidirectionally driven electromagnetic actuator is installed between the key and the mass body is conceivable. In such a keyboard device, the plunger of the electromagnetic actuator is in contact with the key by its own weight and the weight of the plunger. When the key is not pressed, the key stops at the rest position (key release position) because the load in the key release direction from the mass body is greater than the urging force in the key press direction due to the weight of the key. As the load from the mass body due to the driving force of the electromagnetic actuator is reduced, the urging force in the key pressing direction due to the weight of the key becomes larger than the load in the key release direction from the mass body, so that the key is It rotates to the position (key pressing position). Thereby, both the force control for the key pressing operation to the key and the automatic operation of the key are performed by the cooperation of the reaction force from the mass body applied to the key and the driving force from the driving force applying means. be able to.

  However, in the above keyboard apparatus, in the key pressing process of the automatic performance of the key, the plunger moves away from the key, so that the key operates only by the moment in the key pressing direction due to its own weight. For this reason, there is no problem in the automatic performance of the music with a slow tempo, but in the automatic performance of the music with a fast tempo, the driving speed of the plunger is increased, so that the rotation to the end position of the key is delayed. That is, in the operation region where the contact portion between the key and the plunger is separated, the key cannot follow the operation of the plunger, and the rotation of the key is delayed with respect to the return of the plunger. As described above, in the configuration in which the plunger is brought into contact with the key so as to be able to contact and separate, there is a limit to increasing the key driving frequency in automatic performance. For this reason, there is a problem that the agility of the key operation is insufficient when performing an automatic performance of a song with a fast tempo.

  On the other hand, as shown in Patent Document 2 and the like, there is a conventional keyboard device in which the tip of a plunger and a key are connected so as to be relatively movable by a link mechanism. In this configuration, since the plunger and the key are always connected, the key can always follow the operation of the plunger even when the key is automatically operated by driving the actuator. However, since the plunger and the key are always connected by the link mechanism, the smooth movement of the plunger that moves linearly and the key that rotates about the fulcrum is hindered, and the operation of the key close to a natural keyboard instrument is prevented. There was a problem that could not be reproduced.

Japanese Patent No. 3644136 Japanese Patent No. 2956180

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a keyboard device that can increase the key drive frequency in an automatic operation while having a simple configuration, and can perform an agile key operation. It is to provide.

  In order to solve the above-described problems, the keyboard device according to the present invention is configured such that the key (20) supported to be rotatable about the fulcrum (12) and the key (20) are urged in the key release direction. The mass (30) that provides reaction force to the performance operation in conjunction with the key (20) and the key (20) by moving forward and backward between the key (20) and the mass (30). And a transmission member (42) for transmitting a load from one of the mass bodies (30) to the other, and a bidirectional driving of the transmission member (42) between the key (20) side and the mass body (30) side. A drive-type actuator (40), and the cooperation of the reaction force from the mass body (30) applied to the key (20) and the drive force from the actuator (40) is applied to the key (20). Keyboard device configured to be able to perform both force control for key press operation and automatic operation of the key (20) 0), a connection mechanism (80) for connecting the transmission member (42) and the key (20) is provided between the transmission member (42) and the key (20). 80) includes a connector (85) fixed to the transmission member (42), and the connector (85) is connected to the key (20) or the member (25) fixed to the key (20). The transmission member (42) has a first contact portion (81b) and a second contact portion (87a) disposed with a predetermined gap on both sides in the advancing / retreating direction of the actuator (40). In the automatic operation of the key (20) by driving, when the transmission member (42) moves toward the key (20), the first contact portion (81b) is fixed to the key (20) or the key (20). When the transmission member (42) moves away from the key (20) while abutting on the member (25), the second abutting portion ( 7a) is characterized in that it abuts against the key (20) or said key (20) which is fixed to a member (25).

  According to the keyboard device of the present invention, in the automatic operation of the key by driving the actuator, when the transmission member moves toward the key, the first contact portion of the coupling tool is the key or a member fixed to the key. On the other hand, when the transmission member moves away from the key, the second contact portion contacts the key or a member fixed to the key. When performing, even when the transmission member driven by the actuator moves in either the forward or backward direction, the transmission member comes into contact with the key or a member fixed to the key. Thereby, operation | movement of a transmission member can be favorably transmitted with respect to a key. Therefore, even when the drive speed of the transmission member is high, it is possible to avoid a delay in the key rotation. That is, in the automatic operation of the key, it is possible to eliminate an operation region in which the contact portion between the key and the transmission member is separated, so that the key can always follow the operation of the transmission member. Accordingly, since the key drive frequency can be increased in automatic performance, it is possible to ensure the agility of the key operation when performing automatic performance of music with a fast tempo.

  In particular, the above keyboard device includes a mass body that urges the key in the key release direction, and the transmission member moves forward and backward between the key and the mass body, so that the key and the mass body can be moved from one side. Since the load is configured to be transmitted to the other, if the second contact portion of the coupling mechanism is not provided, the key is not self-weighted when the transmission member is driven away from the key by the actuator. It becomes the movement only by the moment of the key pressing direction by. In contrast, in the present invention, since the second contact portion of the coupling mechanism is provided, when the transmission member is driven away from the key by the actuator, the second contact portion causes the transmission member to contact the key side. Since they can be brought into contact with each other, a driving force in the key pressing direction can be applied from the actuator to the key. Therefore, in the automatic operation of the key, the key can be quickly rotated in the key pressing direction.

  Further, in this keyboard device, the first contact portion and the second contact portion on the transmission member side are alternately in contact with the key side, so that it is compared with the conventional structure in which the transmission member and the key are always connected by the link mechanism. Thus, it is possible to ensure independent and smooth operations of the transmission member that moves forward and backward on the straight line and the key that rotates about the fulcrum. Accordingly, good operation of the key can be realized in general performance operations involving force sense control of the key by the actuator and automatic operation of the key.

  As one embodiment of the keyboard device, the member (25) fixed to the key (20) includes a protruding shaft portion (26) protruding from the key (20) and the tip of the shaft portion (26). A projection (25) having a head (27) having a larger diameter than the shaft (26) provided on the shaft (26), and the connector (85) is a key on the head (27) of the projection (25). It has a holding piece (87) that holds the surface (27b) on the (20) side, and the first abutting portion (81b) is provided at the tip (81) of the transmission member (42), and the protruding portion (25 ) Is opposed to the surface (27a) opposite to the key (20) of the head (27), and the second contact portion (87a) is provided on the holding piece (87), and the projection (25 ) May face the surface (27b) on the key (20) side of the head (27). According to this configuration, it is possible to eliminate an area in which the contact portion between the key and the transmission member is separated in the automatic operation of the key with a simple configuration in which the number of parts is reduced.

  Further, in this case, the holding pieces (87, 87) are inserted between the head (27) of the protrusion (25) and the key (20), and the key (20) is formed on both sides of the shaft (26). It may be a pair of long plate-like portions extending in the longitudinal direction. According to this, when the second abutting portion provided on the holding piece comes into contact with the protrusion on the key side and the key is driven by the movement of the transmission member, the holding piece on the transmission member side that moves linearly, The key-side protrusion that rotates about the center can be satisfactorily held. Therefore, the protrusion can be smoothly driven by the holding piece.

  In the keyboard device, the first contact portion (81b) or the second contact portion (87a), the key (20) that contacts them, or the member (25) fixed to the key (20) At least one of the above may be provided with buffer members (91, 93) for buffering mutual contact. According to this, with the operation of the key and the transmission member, it is possible to effectively mitigate the impact when the first contact portion or the second contact portion contacts the key or the member fixed to the key side. . Further, it is possible to reduce mechanical noise that occurs when the first contact portion or the second contact portion contacts the key or a member fixed to the key side.

In the keyboard device, the first contact portion (81b) or the second contact portion (87a), the key (20) that contacts them, or the member (25) fixed to the key (20) At least one of these may be provided with a friction reducing member (91, 93) for reducing friction caused by sliding contact with each other. According to this, friction due to sliding contact between the first contact portion (81b) or the second contact portion (87a) and the key (20) or the member (25) fixed to the key (20) is effective. Can be reduced. Therefore, smooth operation of the key and the transmission member can be ensured.
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, the key drive frequency in automatic performance can be increased with a simple configuration, and agile automatic operation of keys is possible.

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 which has a key in a non-key-pressing position, (b) is a figure which shows the state in which a key is in a key-pressing position. It is the elements on larger scale which show the detailed structure of a connection mechanism. It is a figure which shows the detailed structure of a connection mechanism, (a) thru | or (d) is a figure which respectively shows the AA, BB, CC, DD arrow of FIG. It is a figure which shows schematic structure of the keyboard apparatus containing a drive control circuit. It is a figure for demonstrating operation | movement of the connection mechanism in automatic performance, (a) is a state when a key exists in a rest position, (b) is a state when a key transfers to an end position from a rest position, ( c) is a diagram showing a state when the key is at the end position. It is a graph which shows a time-dependent change of the locus | trajectory of the key with respect to the drive force of an electromagnetic actuator. It is a figure which shows notionally the structure of the keyboard apparatus concerning 2nd Embodiment of this invention. It is the elements on larger scale which show the detailed structure of the connection mechanism with which the keyboard apparatus of 2nd Embodiment is provided.

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 key 20 and the mass body 30. FIG. 4A is a state where the key 20 is in the rest position (non-key-pressed position), and FIG. It is a figure which shows the state in an end position (key pressing position).

  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. Further, a coupling mechanism 80 for coupling them is installed between the plunger 42 of the electromagnetic actuator 40 and the key 20.

  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 contacts 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 plunger 42 to be described later, and gives a reaction force to the performance operation to the key 20 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 includes an upper surface 20d of the key 20 on the rear side of the key fulcrum 12 and a shank portion 32 of the mass body 30. It is installed between. 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 is fixed to the upper end of the first rod 42b. The plate member 43 has a horizontal main body portion 43a fixed to the upper end of the first rod 42b, and a front side 43b extending vertically downward from the front end of the main body portion 43a, and has a substantially L-shaped cross section. Is formed. 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. On the other hand, a cylindrical roller 36 is attached at a position facing the base member 44 in the shank portion 32 of the mass body 30. The roller 36 has an axial direction horizontally oriented along the arrangement direction of the keys 20, and a lower side surface (cylindrical surface) is placed on the upper surface of the base member 44.

  On the other hand, a connecting mechanism 80 is provided at the lower end of the plunger 42 (the lower end of the second rod 42c). 5 and 6 are diagrams showing a detailed configuration of the coupling mechanism 80, FIG. 5 is a partially enlarged view, and FIGS. 6A to 6D are respectively AA, BB, and FIG. It is a figure which shows CC and DD arrow view. As shown in these drawings, the coupling mechanism 80 includes a plunger cap 81 attached to the lower end of the second rod 42 c of the plunger 42, and a plate-shaped coupling tool 85 that is fixed to the plunger cap 81 and extends toward the key 20. And a capstan screw (hereinafter simply referred to as “screw”) 25 fixed to the upper surface 20 d of the key 20. The plunger cap 81 is a synthetic resin or metal member formed in a substantially rectangular parallelepiped shape, and an insertion hole 81c into which the lower end of the second rod 42b is inserted is opened on the upper surface 81a. The screw 25 includes a shaft portion 26 formed of a columnar protrusion protruding upward from the upper surface 20d of the key 20, and a head formed in a columnar shape having a larger diameter than the shaft portion 26 provided at the tip of the shaft portion 26. Part 27.

  The connector 85 is a member formed by bending a metal flat plate member, and a main body portion 86 formed of a rectangular flat plate extending in the vertical direction from the plunger cap 81, and substantially perpendicular to the lower end of the main body portion 86. A pair of flat plate-like holding pieces 87 and 87 connected by bending are provided, and the entire cross-sectional shape is formed in a substantially L shape. The holding pieces 87 and 87 are a pair of long plate-like portions that are inserted between the head portion 27 of the screw 25 and the upper surface 20 d of the key 20 and extend in the longitudinal direction of the key 20 on both sides of the shaft portion 26. .

  Moreover, as shown to Fig.6 (a), the screw insertion hole 85a which penetrates the screw | thread 88 is formed in the main-body part 86 of the connection tool 85. As shown in FIG. The screw 88 is inserted into the screw insertion hole 85 a of the main body 86 and then fastened and fixed to the screw hole 81 d provided on the side surface of the plunger cap 81. The screw 88 fixes the main body 86 of the connector 85 to the side surface of the plunger cap 81, and the tip of the second rod 42 b inserted into the insertion hole 81 c of the plunger cap 81 is fixed to the plunger cap 81. ing. As shown in FIG. 6A, the screw insertion hole 85a of the body portion 86 of the connector 85 is an elongated hole that extends vertically so that the fixing position of the connector 85 with respect to the plunger cap 81 can be adjusted in the vertical direction. It is formed as.

  Further, the pair of holding pieces 87, 87 provided at the lower end of the connector 85 are installed in a state of being inserted into both sides (both sides in the width direction of the key 20) of the shaft portion 26 of the screw 25. The head 27 is disposed on the lower surface 27 b side. The pair of holding pieces 87 and 87 are formed in a long flat plate shape extending in the longitudinal direction of the key 20. As a result, the head 27 of the screw 25 is held in a state of being relatively movable between the lower surface 81 b of the plunger cap 81 and the upper surfaces 87 a and 87 a of the holding pieces 87 and 87.

  A buffer sheet (buffer member) 91 having a buffering action is affixed to the upper surfaces 87a and 87a of the holding pieces 87 and 87, and a low friction sheet 92 having a surface friction reducing effect is mounted on the upper surface of the buffer sheet 91. It is affixed in layers. The upper surfaces 87a and 87a of the holding pieces 87 and 87 are in contact with the lower surface 27b of the head portion 27 of the screw 25 through the buffer sheet 91 and the low friction sheet 92. On the other hand, a buffer sheet (buffer member) 93 having a buffering action is also affixed to the lower surface 81 b of the plunger cap 81, and a low friction sheet 94 having a surface friction reducing effect is superimposed on the lower surface of the buffer sheet 93. It is affixed. The lower surface 81 b of the plunger cap 81 is in contact with the upper surface 27 a of the head portion 27 of the screw 25 via the buffer sheet 93 and the low friction sheet 94.

  In the following description, the lower surface 81b of the plunger cap 81 includes the surface of the low friction sheet 94 attached to the lower surface 81b of the plunger cap 81, and the upper surface 87a of the holding piece 87 is referred to as the holding piece. The surface of the low friction sheet 92 affixed to the upper surface 87a of 87 is included. As a specific example of the buffer sheets 91 and 93, an artificial leather sheet excellent in shock absorption can be used. In addition, as a specific example of the low friction sheets 92 and 94, an ultrahigh molecular weight polyethylene sheet having a very low surface friction coefficient can be used.

  In the connecting mechanism 80, the connecting tool 85 and the screw 25 move relative to each other when the plunger 42 moves back and forth in the vertical direction. As a result, the distance between the lower surface 81b of the plunger cap 81 and the upper surface 27a of the head 27 of the screw 25 and the distance between the lower surface 27b of the head 27 of the screw 25 and the upper surface 87a of the holding piece 87 change. The head portion 27 alternately contacts either the lower surface 81 b of the plunger cap 81 or the upper surface 87 a of the holding piece 87.

  Further, the keyboard device 10 is provided with a position sensor (operation detection means) 47 for detecting the position of the 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 plunger 42 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 plunger 42, other than the reflective sensor as described above, the illustration is omitted, but an optical sensor of another configuration, or a sensor other than the optical sensor is used. But you can. Further, instead of the position sensor 47, a position detection switch or the like may be installed. Here, a position sensor 47 for detecting the position is installed as an example of the operation detecting means for detecting the operation of the plunger 42. In addition, a speed sensor for detecting the speed, acceleration, etc. of the plunger 42, It is also possible to install one of the acceleration sensors or a plurality of them.

  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. In addition to the control program executed by the CPU 51 and various table data, a haptic application table 75 and automatic performance data 76 described later are stored in the ROM 52 and the flash memory 54. 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. 7 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 has the configuration shown in FIG. 1 and includes a ROM 52 that stores a force sense imparting table 75 and automatic performance data 76. The force sense imparting table 75 is a table that stores a pattern of the driving force that the electromagnetic actuator 40 should generate. 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.

  Next, the operation of the keyboard apparatus 10 having the above configuration will be described with reference to FIG. Here, first, the operation of the key 20 when the player operates the key 20 will be described. In the following description, the key pressing direction refers to the direction in which the key 20 rotates from the rest position (non-key pressing position) to the end position (key pressing position), and the key release direction refers to the key 20 being the end. It refers to the direction of rotation from the position to the rest position.

  The key 20 is subjected to a key pressing force by 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 plunger 42. 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 rest 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 around the key fulcrum 12 while pushing up the mass body 30 via the plunger 42. 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 end position shown in FIG. When the key 20 is in the end position, the mass body 30 pushed up by the key 20 via the plunger 42 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 plunger 42. The key 20 returns to the rest position by both this load and its own weight balance.

  When the operation of the key 20 using the inertial mass of the mass body 30 is performed, the plunger 42 is driven bidirectionally by the electromagnetic actuator 40 to assist the urging force applied to the key 20 from the mass body 30 or 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. Here, the details of the force control for the key pressing operation are omitted.

  As described above, when the player operates the key 20, the weight of the mass body 30 is applied to the plunger 42, so that the plunger 42 is biased downward. Therefore, in the coupling mechanism 80 shown in FIG. 5, the lower surface 81 b of the plunger cap 81 is always in contact with the upper surface 27 a of the head 27 of the screw 25. Thereby, the operation of the key 20 is transmitted to the plunger 42 side via the coupling mechanism 80. The same applies to the case where force sense control for assisting or reducing the urging force applied to the key 20 from the mass body 30 by the electromagnetic actuator 40 is performed in response to the operation of the key 20 by the performer.

  On the other hand, in the keyboard device 10, the key 20 can be automatically operated by driving the plunger 42 bidirectionally by the electromagnetic actuator 40 in a state where the player has not operated the key 20. . By utilizing this, automatic performance with automatic operation (unattended operation) of the key 20 can be performed.

  In this automatic performance, based on the automatic performance data 76 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. Thereby, the plunger 42 moves upward (the mass body 30 side) by driving the forward movement coil 41a. At this time, in the coupling mechanism 80, the head 27 of the screw 25 is pulled upward by the holding piece 87 as described later. Therefore, 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 76, it is possible to cause the key 20 to perform an operation that matches the performance sound.

  In this automatic performance, the two-way drive control by the electromagnetic actuator 40 is performed based on the automatic performance data 76 to control the operation speed of the key 20 in the key pressing direction and the key releasing direction. Thus, if the electromagnetic actuator 40 is driven and controlled bidirectionally based on the automatic performance data 76, it is possible to adjust the moving speed of the key 20 accompanying the pressing / releasing key operation to a desired speed. Accordingly, in combination with the action of the connecting mechanism 80 described later, it becomes possible to visually reproduce a fast pressing / slowing key operation and a slow pressing / slipping key operation, thereby improving the quality of automatic performance.

  The operation of the key 20 and the coupling mechanism 80 in automatic performance will be described in detail. 8A and 8B are diagrams for explaining the operation of the coupling mechanism 80 in automatic performance. FIG. 8A shows a state in which the key 20 is at the rest position, and FIG. 8B shows that the key 20 moves from the rest position to the end position. (C) is a figure which shows the state in which the key 20 exists in an end position. First, in the automatic performance mode, when the driving force of the electromagnetic actuator 40 is not acting on the plunger 42, the plunger 42 is positioned at the lowest point by the weight of the mass body 30. Thereby, the key 20 is in the rest position shown in FIG. The coupling mechanism 80 at this time is in a state in which the lower surface 81b of the plunger cap 81 is in contact with (mounted on) the upper surface 27a of the head 27 of the screw 25, as shown in FIG. In this state, the lower surface 27b of the head 27 of the screw 25 and the upper surface 87a of the holding piece 87 of the connector 85 are opposed to each other with a predetermined gap therebetween.

  When the automatic performance is started with the key 20 in the rest position as described above, the plunger 42 is driven upward by the electromagnetic actuator 40. In the connection mechanism 80 at this time, as shown in FIG. 8B, the connection tool 85 is lifted upward by the upward movement of the plunger 42. Thereby, the lower surface 81b of the plunger cap 81 is separated from the upper surface 27a of the head portion 27 of the screw 25, and instead, the upper surface 87a of the holding piece 87 abuts against the lower surface 27b of the head portion 27 of the screw 25. When the plunger 42 is further driven upward from this state and the connector 85 is lifted upward, as shown in FIG. 8B, the head 27 of the screw 25 held by the holding piece 87 is lifted upward. It is done. Thereby, since the rear side of the fulcrum 12 of the key 20 is lifted upward, the key 20 rotates from the rest position toward the end position (automatic key pressing operation).

  Further, when the plunger 42 is driven upward by the electromagnetic actuator 40, the key 20 is rotated to a position where the lower surface of the front end 20a of the key 20 contacts the key lower limit stopper 22, and the key 20 is moved to the end position (see FIG. 4B). ) As shown in FIG. 8 (c), the connecting mechanism 80 at this time is such that the connecting tool 85 is lifted to the uppermost position by the plunger 42, and the head of the screw 25 held by the holding piece 87 of the connecting tool 85. 27 is pulled up to the uppermost position.

  On the other hand, when the plunger 42 is driven downward by the electromagnetic actuator 40 with the key 20 in the end position, the connector 85 is pushed downward from the state of FIG. Thereby, the upper surface 87a of the holding piece 87 is separated from the lower surface 27b of the head portion 27 of the screw 25, and instead, the lower surface 81b of the plunger cap 81 contacts the upper surface 27a of the head portion 27 of the screw 25. Accordingly, the screw 25 is pushed downward by the plunger 42 and the connecting tool 85, and the rear side of the key 20 is pushed downward from the fulcrum 12 of the key 20, so that the key 20 rotates from the end position toward the rest position (automatic release). Key action). In this case, the plunger 42 and the key 20 move together while the lower surface 81b of the plunger cap 81 is always in contact with the upper surface 27a of the head 27 of the screw 25 until the key 20 returns to the rest position. In the automatic performance, the automatic key pressing operation and the automatic key releasing operation are repeatedly performed alternately, whereby the key 20 is automatically pressed and released.

  As described above, in the automatic performance mode, it is possible to automatically operate the key 20 between the rest position and the end position by driving the plunger 42 by the electromagnetic actuator 40. At this time, in the keyboard device 10 of the present embodiment, when the plunger 42 is driven upward by the driving force of the electromagnetic actuator 40, the head of the screw 25 is held by the holding piece 87 of the connector 85 as shown in FIG. Since the portion 27 can be pulled up while being held, the key 20 can be forcibly rotated by the driving force of the electromagnetic actuator 40 from the rest position to the end position. Therefore, the key pressing operation of the key 20 from the rest position toward the end position can be performed at a desired speed controlled by the electromagnetic actuator 40.

  As described above, in the keyboard device 10 of this embodiment, when the plunger 42 moves downward (toward the key 20) in the automatic performance (automatic operation of the key 20) by driving the electromagnetic actuator 40, the plunger cap When the lower surface (first contact portion) 81b of 81 abuts 27a on the upper surface of the head 27 of the screw 25 fixed to the key 20, the plunger 42 moves upward (toward the direction away from the key 20). The upper surface (second contact portion) 87a of the holding piece 87 of the tool 85 is in contact with the lower surface 27b of the head 27 of the screw 25. Thereby, when performing the automatic operation of the key 20 by driving the electromagnetic actuator 40, not only when the plunger 42 driven by the electromagnetic actuator 40 moves downward toward the key 20, but also moves upward away from the key 20. Even in this case, since the plunger 42 abuts on the screw 25, both forward and backward movements of the plunger 42 can be transmitted to the key 20. Therefore, even when the driving speed of the plunger 42 is fast, there is no possibility that the rotation of the key 20 is delayed. That is, in the automatic performance, the operation region where the key 20 and the plunger 42 are separated can be substantially eliminated, so that the key 20 can always follow the operation of the plunger 42. Thereby, since the drive frequency of the key 20 can be increased in automatic performance, the agility of the operation of the key 20 can be ensured when performing automatic performance of music with a fast tempo.

  In particular, the keyboard device 10 of the present embodiment includes the mass body 30 that urges the key 20 in the direction of the rest position, and the plunger 42 moves forward and backward between the key 20 and the mass body 30. The load from one of the key 20 and the mass body 30 is transmitted to the other. Therefore, if the holding piece 87 of the coupling mechanism 80 is not provided, when the plunger 42 is driven upward (the direction away from the key 20) by the electromagnetic actuator 40, the key 20 is in the key pressing direction due to its own weight. It becomes the movement only by the moment. On the other hand, in the keyboard device 10 of the present embodiment, the holding piece 87 of the coupling mechanism 80 is configured to hold the head 27 of the screw 25 and pull up, so that the electromagnetic actuator 40 moves the plunger 42 upward (the key 20 The key 20 can be interlocked with the plunger 42 and driven in the key pressing direction from the electromagnetic actuator 40 to the key 20. Therefore, in the automatic performance, the key 20 can be rotated in the key pressing direction with a quick operation.

  The above operation will be further described. FIG. 9 is a graph showing the change over time of the locus of the key 20 with respect to the driving force (thrust force by the solenoid) of the electromagnetic actuator 40 in automatic performance. In the key locus graph shown in the figure, a thick solid line indicates the locus of the key 20 in the keyboard device 10 provided with the connection mechanism 80 of the present embodiment, and a thin dotted line does not include the connection mechanism 80. It shows the locus of keys in the keyboard device.

  As shown in the graph in the figure, in the automatic performance, when the upward thrust F1 is acting on the plunger 42 as the driving force of the electromagnetic actuator 40, the plunger 42 moves upward, so that the key 20 is in the rest position. To end position. On the other hand, when the downward thrust F2 acts on the plunger 42 as the driving force of the electromagnetic actuator 40, the plunger 42 moves downward, so that the key 20 rotates from the end position to the rest position.

  Here, in the keyboard device 10 of the present embodiment, when the upward thrust F1 acts on the plunger 42, the rear side of the fulcrum 12 of the key 20 is pulled up integrally with the plunger 42 by the connecting mechanism 80. Therefore, the operation (key pressing operation) of the key 20 from the rest position to the end position is quickly performed in a short time. On the other hand, in the keyboard device that does not include the connection mechanism 80, the connection portion between the plunger and the screw is placed in a state in which the lower end of the plunger can contact and separate from the upper end of the screw. Therefore, when the upward thrust F1 acts on the plunger, the plunger and the key are separated from each other, and the key rotates from the rest position to the end position only by its own weight balance. Therefore, the rest position is compared with the keyboard device of the present embodiment. There is a delay in the operation of the key from to the end position. This delay is repeatedly generated and accumulated every time the key moves from the rest position to the end position. As a result, a delayed operation is actually performed with respect to a predetermined key operation that is controlled by the control unit. For this reason, there is a disadvantage that the timing of the musical tone of the automatic performance and the key operation are slightly shifted, or that the automatic performance operation is visually delayed. These points are particularly noticeable when performing an automatic performance of a song with a fast tempo. In the keyboard device 10 of the present embodiment, the operation of the key 20 from the rest position to the end position is performed quickly, so there is no such inconvenience as described above, and even when performing automatic performance of a fast-tempo music, Sufficient movement agility can be secured.

  In the keyboard device 10, in the coupling mechanism 80, the lower surface (first contact portion) 81 b of the plunger cap 81 fixed to the plunger 42 side and the upper surface (second contact portion) 87 a of the holding piece 87 are alternated. Therefore, the plunger 42 and the fulcrum 12 that move forward and backward linearly are compared with the conventional structure in which the plunger 42 and the key 20 are always connected by a link mechanism. Each independent and smooth operation with the key 20 that rotates about the center can be secured. Therefore, in the performance operation accompanied by the force sense control of the key 20 by the electromagnetic actuator 40 and the automatic operation of the key 20 in general, the good operation of the key 20 closer to the natural keyboard instrument can be realized.

  Further, in the keyboard device 10 of the present embodiment, the buffer sheet for buffering the contact with the screw 25 is provided on the lower surface 81b of the plunger cap 81 with which the head 27 of the screw 25 contacts and the upper surface 87a of the holding piece 87. 91, 93 are provided. By providing the buffer sheets 91 and 93, the impact when the screw 25 comes into contact with the lower surface 81 b of the plunger cap 81 or the upper surface 87 a of the holding piece 87 with the operation of the key 20 and the plunger 42 is effectively reduced. Can do. Further, it is possible to reduce mechanical noise that occurs when the screw 25 contacts the lower surface 81b of the plunger cap 81 or the upper surface 87a of the holding piece 87.

  Further, the key 20 performs a rotation operation around the key fulcrum 12, while the plunger 42 performs a linear motion operation in the axial direction inside the forward moving coil 41a and the backward moving coil 41b. Therefore, in the connection mechanism 80 in which the lower end of the plunger 42 and the screw 25 of the key 20 abut, the lower surface 81b of the plunger cap 81 that moves straight up and down and the upper surface 87a of the holding piece 87 rotate as the key 20 moves. The screw 25 moves in sliding contact with the upper and lower surfaces 27a, 27b of the head 27. On the other hand, in this embodiment, the low friction sheets 92 and 94 for ensuring smooth sliding with respect to the screw 25 are installed on the lower surface 81b of the plunger cap 81 and the upper surface 87a of the holding piece 87. With the movement of the plunger 20 and the plunger 42, relative sliding between the screw 25 and the lower surface 81b of the plunger cap 81 or the upper surface 87a of the holding piece 87 can be performed smoothly. Therefore, a smoother operation of the key 20 and the plunger 42 can be ensured.

[Second Embodiment]
Next, a keyboard apparatus 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. 10 is a schematic diagram showing the configuration of the keyboard device 10-2 of the second embodiment. Moreover, FIG. 11 is the elements on larger scale which show the connection mechanism 80-2 with which the keyboard apparatus 10-2 is provided. In the keyboard device 10-2 of the present embodiment, the vertical relationship of the arrangement of the key 20 and the mass body 30 is reversed compared to the keyboard device 10 of the first embodiment, and accordingly, the key 20 and the mass body 30 are reversed. 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 10-2 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 plunger 42 are disposed between the lower surface 20e of the key 20 and the mass body 30. ing. In the plunger 42, the upper end of the second rod 42 c that extends upward is in contact with the screw 25 installed on the lower surface 20 e of the key 20 on the front side (the same side as the key pressing portion 20 c) with respect to the key fulcrum 12. The lower end of the base member 44 fixed to the 1 rod 42 b is in contact with the upper surface of the shank portion 32 extending to the opposite side of the mass portion 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 plunger 42, and the mass body 30 are arranged in this order from the lower side on the opposite side (rear side) to the key pressing portion 20c with respect to the key fulcrum 12 of the key 20. On the other hand, in the keyboard device 10-2 of the present embodiment, on the same side (front side) as the key pressing portion 20c with respect to the key fulcrum 12 of the key 20, the key 20, the electromagnetic actuator 40 and the plunger 42 from the upper side, The mass bodies 30 are arranged in this order.

  In the keyboard device 10 of the present embodiment, a coupling mechanism 80-2 is provided between the upper end of the second rod 42c and the lower surface 20e of the key 20. The connection mechanism 80-2 has the same configuration as that of the connection mechanism 80 of the first embodiment except that the upper and lower arrangement configurations are reversed. Therefore, detailed description of the coupling mechanism 80 is omitted here.

  Also in the keyboard device 10-2 of the present embodiment, the key 20 is not pressed by both the weight balance before and after the key fulcrum 12 and the load from the mass body 30 via the plunger 42. In the state, as shown in FIG. 10, the rear end 20 b is at the rest position where it abuts against the key upper limit stopper 21. 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 plunger 42. Thus, the key 20 is in the end position where 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 plunger 42. The key 20 returns to the non-key-pressed position with both this load and its own weight balance. In such a performance operation of the key 20, in the coupling mechanism 80, the head 27 of the screw 25 is always in contact with the plunger cap 81, so that the key 20 operates integrally with the plunger.

  In the keyboard device 10-2 of the present embodiment, an automatic performance can be performed by driving the plunger 42 by the electromagnetic actuator 40. The operation of the coupling mechanism 80 in this case is the same as in the first embodiment. When the plunger 42 is driven downward by the electromagnetic actuator 40, the holding piece 87 of the coupling tool 85 abuts on the head 27 of the screw 25, and the key 20 is pulled down. Thereby, the key 20 can be forcibly rotated from the rest position to the end position. Therefore, the operation of the key 20 from the rest position to the end position can be quickly performed in a short time.

  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, in the above embodiment, the buffer sheet 91 is installed on the upper surfaces 87a and 87a of the holding pieces 87 and 87, and the buffer sheet 93 is installed on the lower surface 81b of the plunger cap 81. You may provide in the upper surface 27a and the lower surface 27b of the head 27 of the screw 25, respectively. This also applies to the low friction sheet 94. In addition, the specific shape and the like of the coupler included in the coupling mechanism according to the present invention is not limited to the shape and the like of the coupler 85 shown in the above embodiment, and may be other shapes.

DESCRIPTION OF SYMBOLS 1 Electronic keyboard instrument 10 Keyboard apparatus 12 Key fulcrum 20 Key 20d Upper surface 20e Lower surface 25 Screw (projection part)
26 Shaft portion 27 Head portion 27a Upper surface 27b Lower surface 30 Mass body 31 Mass body fulcrum 40 Electromagnetic actuator 42 Plunger (transmission member)
47 Position Sensor 50 Main Control Unit 58 Control Driver 75 Force Sensing Table 76 Automatic Performance Data 80 Connection Mechanism 81 Plunger Cap 81a Upper Surface 81b Lower Surface (First Abutting Section)
85 connector 86 body 87 holding piece 87a upper surface (second contact portion)
91, 93 Buffer sheet (buffer member)
92,94 Low friction sheet (friction reduction member)

Claims (5)

A key supported to be pivotable around a fulcrum;
A mass body that applies a reaction force to the performance operation in conjunction with the key by urging the key in the key release direction;
A transmission member that transmits a load from one of the key and the mass body to the other by moving forward and backward between the key and the mass body;
A bidirectionally driven actuator that drives the transmission member bidirectionally between the key side and the mass body side;
With
By the cooperation of the reaction force from the mass body applied to the key and the driving force from the actuator, both the force control for the key pressing operation to the key and the automatic operation of the key can be performed. A configured keyboard device,
Between the transmission member and the key, a connection mechanism for connecting the transmission member and the key is provided,
The coupling mechanism includes a coupling tool fixed to the transmission member, and the coupling tool has a predetermined gap on each side of the transmission member in the advancing and retreating direction with respect to the key or the member fixed to the key. A first abutting portion and a second abutting portion arranged to have,
In the automatic movement of the key by driving the actuator, when the transmission member moves toward the key, the first contact portion contacts the key or a member fixed to the key, while the transmission The keyboard device, wherein when the member moves away from the key, the second contact portion contacts the key or a member fixed to the key. The member fixed to the key is a protrusion having a protruding shaft portion protruding from the key and a head having a larger diameter than the shaft portion provided at the tip of the shaft portion,
The connector has a holding piece for holding the key side surface of the head of the protrusion,
The first contact portion is provided at a distal end of the transmission member, and is opposed to a surface opposite to the key in the head portion of the projection portion,
2. The keyboard device according to claim 1, wherein the second contact portion is provided on the holding piece and faces the key-side surface of the head portion of the protrusion. The holding piece is a pair of long plate-like portions that are inserted between the head portion of the protrusion and the key and extend in the longitudinal direction of the key on both sides of the shaft portion. The keyboard device according to claim 2. At least one of the first abutting portion or the second abutting portion and the key that abuts against the first abutting portion or a member fixed to the key is provided with a buffer member for buffering the mutual abutting The keyboard device according to claim 1, wherein the keyboard device is provided. Friction reduction for reducing friction due to mutual sliding contact between at least one of the first contact part or the second contact part and the key slidingly contacting the member or a member fixed to the key. The keyboard device according to claim 1, wherein a member is installed.

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