Keyboard device

Abstract

To differentiate resistance generated during key press and release, using a method different from magnetic field control, when achieving touch feeling by resistance using fluid.SOLUTION: A keyboard device 10 according to one embodiment includes: a first key 70 arranged to be depressible; a holding portion 23 for enclosing and retaining fluid; and a first movable member 21 configured to receive force and move within fluid 29 in a first direction when the first key 70 is depressed. The first movable member 21 has such a shape that the force exerted by the fluid 29 when moving in the first direction is greater than the force exerted by the fluid 29 when the first key 70 moves in a second direction opposite to the first direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a keyboard device. [Background technology]

[0002] The feeling when pressing a key on a keyboard device (hereinafter referred to as touch) is designed in various ways depending on the purpose. For example, the touch of an electronic piano is designed to provide a touch similar to that of an acoustic piano. In designing the touch, it is necessary to control the load that depends on various parameters. Patent Document 1 discloses a technology that uses resistance using a magnetic fluid in designing the touch. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-236985 Summary of the Invention [Problem to be solved by the invention]

[0004] When a key is pressed, a reaction force is applied to the finger, providing a sense of touch. However, when the key is released, it is necessary for the key to quickly return to its rest position. On the other hand, resistance using a fluid occurs in the opposite direction to the movement of an object moving through the fluid, so resistance is generated that hinders the movement of the key when it returns to its rest position upon release. In Patent Document 1, a magnetic fluid is used to control the magnetic field and reduce resistance when the key is released. However, using a magnetic fluid and precisely controlling the magnetic field in conjunction with the movement of the key requires significant costs.

[0005] One of the objects of the present invention is to use a new method to differentiate the resistance generated when a key is pressed and when a key is released, when a touch sensation is obtained by resistance using a fluid. [Means for solving the problem]

[0006] In one embodiment, the keyboard device includes a first key arranged to be depressible, a holding section for surrounding and holding a fluid, and a first moving body configured to receive a force when the first key is pressed and move in a first direction through the fluid, The first moving body has a shape such that the force received from the fluid when moving in the first direction is greater than the force received from the fluid when the first key moves in a second direction opposite to the first direction. [Effects of the Invention]

[0007] According to one embodiment of the present invention, when a touch sensation is obtained by resistance using a fluid, a new method can be used to make the resistance generated when a key is pressed different from the resistance generated when a key is released. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating the appearance of a keyboard device according to an embodiment. [Figure 2] FIG. 2 is a diagram illustrating the configuration of a keyboard section according to an embodiment. [Figure 3] 5A and 5B are diagrams for explaining the operation of a keyboard section in one embodiment. [Figure 4] 4A and 4B are diagrams illustrating a configuration of a fluid load section in one embodiment. [Figure 5] 4A and 4B are diagrams illustrating a configuration of a fluid load section in one embodiment. [Figure 6] 3A and 3B are diagrams illustrating a configuration of a sound generating unit according to an embodiment. [Figure 7] 5A and 5B are diagrams illustrating the operation of a sound generating unit according to an embodiment. [Figure 8] 10A and 10B are diagrams illustrating the configuration of a keyboard section in a modified example. [Figure 9] 10A and 10B are diagrams for explaining the operation of the keyboard section in the modified example. [Figure 10] 10A and 10B are diagrams for explaining the configuration of a fluid load portion in a modified example. [Figure 11]10A and 10B are diagrams for explaining the configuration of a fluid load portion in a modified example. [Figure 12] 10A and 10B are diagrams for explaining the configuration of a fluid load portion in a modified example. [Figure 13] 10A and 10B are diagrams for explaining the configuration of a fluid load portion in a modified example. [Figure 14] 10A and 10B are diagrams illustrating the configuration of a keyboard section in a modified example. [Figure 15] 10A and 10B are diagrams illustrating the configuration of a keyboard section in a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] A keyboard device according to one embodiment of the present invention will be described in detail below with reference to the drawings. The embodiments described below are merely examples, and the present invention should not be construed as being limited to these embodiments. In the drawings referred to in this embodiment, identical parts or parts having similar functions are designated by the same or similar reference symbols (reference symbols consisting of a number followed by A, B, etc.), and repeated explanations may be omitted. Furthermore, for the sake of convenience, the dimensional proportions in the drawings may differ from the actual proportions, and some components may be omitted from the drawings.

[0010] <Embodiment> In one embodiment, the keyboard device includes a configuration that generates a touch sensation using resistance generated by a fluid and a moving object moving through the fluid. The keyboard device will be described in detail below. In the following description, terms such as "upper," "lower," "left," "right," "front," and "rear" refer to the positional relationship of the keyboard device as seen by the player.

[0011] [1. Configuration of keyboard device 1] FIG. 1 is a diagram illustrating the external appearance of a keyboard device according to one embodiment. The keyboard device 1 includes a keyboard section 10 and a sound generation section 80. The keyboard section 10 and the sound generation section 80 may be housed in a single housing, or may be housed in separate housings so that they can be separated from each other. The sound generation section 80 is configured to generate sound by striking a sound generation element. The keyboard section 10 includes a plurality of keys 70. The keys 70 include white keys and black keys. Direction D1 corresponds to the vertical downward direction. Direction D2 corresponds to the direction in which the keys 70 are lined up, from the high-pitched side (right side) to the low-pitched side (left side). Direction D3 corresponds to the direction in which the keys 70 extend, from the front end (near side) of the keys 70 to the rear end (rear side). Directions D1, D2, and D3 have the same meaning in all of the drawings.

[0012] [2. Configuration of keyboard section 10] Fig. 2 is a diagram for explaining the configuration of the keyboard section in one embodiment. Fig. 3 is a diagram for explaining the operation of the keyboard section in one embodiment. In the diagrams described below, the structure of the white keys among the keys 70 will be explained as an example. The structure of the black keys will also be realized with the same or similar configuration as the white keys.

[0013] The frame 40 is fixed to a shelf 45, which is part of the housing of the keyboard device 1. The frame 40 supports the key 70 rotatably around an axis 73. The frame 40 supports the rotational load section 50 rotatably around an axis 55 in the rotational load section 50. The rotational load section 50 includes a rod-shaped member 51 on which the axis 55 is formed, a weight section 56, and a connection section 57. The weight section 56 and the connection section 57 are connected to the rod-shaped member 51 so as to sandwich the axis 55 therebetween. The key 70 and the rotational load section 50 are connected to move in conjunction with each other via the connection section 57 and the connection section 75. The connection section 57 and the connection section 75 are slidably connected.

[0014] When the key 70 is not pressed, i.e., when the key 70 is in the rest position, the weight of the weight 56 ​​rests on the lower limit stopper 61. On the other hand, when the key 70 is pressed with a finger (key pressed), the connection portion 75 moves the connection portion 57 downward, causing the rotation load portion 50 to rotate and the weight portion 56 to move upward. When the weight portion 56 collides with the upper limit stopper 62, the rotation of the rotation load portion 50 is restricted and the key 70 reaches the end position (see FIG. 3). When the finger is released from the key 70 in this state (key released), the weight portion 56 moves downward due to its own weight, causing the rotation load portion 50 to rotate and return the key 70 to the rest position. In this way, the key 70 is arranged so that it can be pressed between the rest position and the end position.

[0015] The key 70 is connected to operate in conjunction with not only the rotation load unit 50 but also the fluid load unit 20. The fluid load unit 20 includes a moving body 21, a holding unit 23, a connecting rod 25, a connection unit 27, and a fluid 29. In this example, the fluid 29 is oil. The holding unit 23 is a case-like member that surrounds and holds the fluid 29. The connection unit 27 is a member that connects the key 70 and the connecting rod 25, and connects them so that the angle between the key 70 and the connecting rod 25 is variable. The connecting rod 25 is a rod-like member that connects the key 70 and the moving body 21 via the connection unit 27. The moving body 21 is placed in the fluid 29 that is surrounded and held by the holding unit 23.

[0016] When the key 70 is pressed, the connecting rod 25 moves downward, and the moving body 21 at the tip of the connecting rod 25 moves through the fluid 29. The moving body 21 moves through the fluid 29. As the moving body 21 moves through the fluid 29, it encounters fluid resistance from the fluid 29. This action also generates a load against the movement of the key 70.

[0017] The fluid resistance generated in the moving body 21 is smaller in the direction in which the moving body 21 moves when the key 70 returns to the rest position (the direction opposite to direction D1) than in the direction in which the moving body 21 moves when the key 70 is pressed down (direction D1). This fluid resistance is achieved by defining the shape of the moving body 21 so that it is asymmetric with respect to a plane normal to the direction of movement. The buoyancy generated by the moving body 21 being present in the fluid 29 also further exacerbates the difference in force received by the moving body 21 depending on the direction of movement. Details of the fluid load unit 20 will be described later.

[0018] As the key 70 moves, the key 70 is subjected to the load generated in the rotation load section 50 and the fluid load section 20. When the key 70 is pressed, the load is applied to the player's finger, providing a sense of touch.

[0019] A detection unit 30 is located below the key 70 to detect the amount of depression of the key 70. In this example, the detection unit 30 is a distance sensor that uses a magnetic field and includes an active sensor 34 that generates a magnetic field and a passive sensor 37 that moves within the magnetic field. The passive sensor 37 is attached to the underside of the key 70. The active sensor 34 is attached to the frame 40 and outputs a measurement signal corresponding to the distance between the passive sensor 37 and the active sensor 34. In other words, the measurement signal output from the detection unit 30 is information indicating at least that the key 70 has been depressed, and in this example, indicates a value corresponding to the amount of depression. The measurement signal is provided to the control unit 100. The detection unit 30 may also be configured to detect the amount of depression of the key 70 using one or more switches, etc.

[0020] The control unit 100 includes a signal processing unit 110 and a communication unit 130. The signal processing unit 110 is an arithmetic processing circuit that generates an operation signal corresponding to the movement of the key 70 based on the measurement signal received from the detection unit 30. The communication unit 130 is a communication module that transmits the operation signal generated by the signal processing unit 110 to the sound generation unit 80.

[0021] 3. Configuration of fluid load section 20 Next, the configuration of the fluid load portion 20 will be described in detail.

[0022] 4 and 5 are diagrams illustrating the configuration of the fluid loading unit in one embodiment. Fig. 4 is a diagram illustrating the movement of the fluid loading unit 20, showing the state when the key 70 is in the rest position (left diagram) and the state when the key 70 is in the end position (right diagram). Fig. 5 shows the configuration of the fluid loading unit 20 when viewed in direction D3.

[0023] In this example, the holder 23 holds one type of fluid 29 therein. Inside the holder 23, there are the moving body 21 and a part of the connecting rod 25. The connecting rod is connected to the upper end of the moving body 21. The connecting rod 25 passes through an opening 231 at the top of the holder 23, thereby connecting the key 70 present outside the holder 23 to the moving body 21 present inside the holder 23. The connecting rod 25 and the holder 23 are slidably connected at the opening 231, so that the movement direction of the connecting rod 25 is limited to the vertical direction.

[0024] 4, in this example, multiple moving bodies 21 exist inside a holding unit 23 that surrounds a fluid 29 by one region. The at least two keys 70 corresponding to the multiple moving bodies 21 may include two adjacent white keys, a white key and a black key that are adjacent to each other, or two black keys that are adjacent to each other with a white key interposed between them.

[0025] In this example, the movable body 21 is generally conical except for the upper end portion connected to the connecting rod 25, and has a circular bottom surface 21b at the lower end. Comparing cross sections S1 and S2 perpendicular to the direction of movement, the area of ​​cross section S2 is larger than the area of ​​cross section S1. Cross section S2 is located lower than cross section S1. In other words, cross section S2 is located farther from the key 70 than cross section S1. It can also be said that cross section S2 is located at a position shifted from cross section S1 in the direction of movement of the movable body 21 when the key 70 is pressed.

[0026] When the key 70 is pressed down and moves toward the end position, that is, when the movable body 21 moves downward, the bottom surface 21b receives resistance from the fluid 29 that prevents the movement. On the other hand, when the key 70 moves toward the rest position, that is, when the movable body 21 moves upward, the side surface 21a receives resistance from the fluid 29 that prevents the movement.

[0027] In either direction of movement, a force acting in the opposite direction to the direction of movement of the movable body 21 acts as fluid resistance. The magnitude of the resistance varies depending on the direction of movement because the shape of the movable body 21 differs in relation to the direction of movement, for example, because the shape of the side surface 21a and the bottom surface 21b differ. In this example, the resistance is greater when the movable body 21 moves downward than when it moves upward.

[0028] The fluid resistance of the fluid load section 20 applies a reaction force to the finger pressing down on the key 70, allowing the player to obtain a desired touch sensation. The fluid resistance can be made smaller when the key 70 returns to the rest position than when it is pressed down. Therefore, the speed at which the key 70 returns from the end position to the rest position can be improved compared to when the same amount of fluid resistance occurs in both directions. Furthermore, the buoyancy that the moving body 21 receives from the fluid 29 makes it easier for the key 70 to return to the rest position. This concludes the explanation of the keyboard section 10.

[0029] [4. Configuration of sound generating unit 80] The sound generating unit 80 will now be described.

[0030] FIG. 6 is a diagram illustrating the configuration of a sound generating unit in one embodiment. The sound generating unit 80 includes a hammer 81, a damper 83, a sound generating body 85, a hammer drive unit 87, a damper drive unit 89, and a drive control unit 800. The drive control unit 800 includes a communication unit 810, a hammer control unit 870, and a damper control unit 890. Although only one set of the hammer 81, the damper 83, the sound generating body 85, the hammer drive unit 87, and the damper drive unit 89 is shown in FIG. 6, there may be multiple sets corresponding to the number of keys 70, for example. The multiple sets include sound generating bodies 85 that emit sounds of different pitches. In this example, the sound generating bodies 85 are strings.

[0031] The communication unit 810 receives the operation signal transmitted from the communication unit 130. The communication unit 810 and the communication unit 130 may be connected by wire or wirelessly. The hammer control unit 870 generates a hammer drive signal based on the operation signal and supplies it to the hammer drive unit 87. The damper control unit 890 generates a damper drive signal based on the operation signal and supplies it to the damper drive unit 89.

[0032] The hammer driving unit 87 is disposed in the lower housing 92 and includes a solenoid or the like for moving the hammer 81 in response to a hammer driving signal. The hammer 81 is a striking unit that is positioned away from the sound producing body 85 and is moved by the hammer driving unit 87 to strike the sound producing body 85. The damper driving unit 89 is disposed in the upper housing 94 and includes a solenoid or the like for moving the damper 83 in response to a damper driving signal. The damper 83 is positioned in contact with the sound producing body 85 and is moved away from the sound producing body 85 by being moved by the damper driving unit 89.

[0033] FIG. 7 is a diagram illustrating the operation of the sound generating unit in one embodiment. When a key 70 is pressed, the pair of hammer 81 and damper 83 corresponding to the sound generating body 85 of the pitch corresponding to that key 70 moves based on an operation signal. Information identifying the pressed key 70 need only be included in the operation signal. As shown in FIG. 7 , when the hammer 81 strikes the sound generating body 85, the hammer drive unit 87 and damper drive unit 89 are driven so that the damper 83 moves away from the sound generating body 85, i.e., moves in a manner similar to the movement of an acoustic piano when a string is struck. Therefore, immediately after the state shown in FIG. 7 , the hammer 81 moves away from the sound generating body 85 again. At some point during the process of the key 70 returning to its rest position, the damper 83 again comes into contact with the sound generating body 85, thereby stopping the sound. In this way, the hammer 81 and damper 83 operate based on the detection results of the detection unit 30.

[0034] As described above, the keyboard device 1 in one embodiment can provide a touch sensation that utilizes fluid resistance. By adjusting the type of fluid 29 and the shape of the moving body 21, a desired touch sensation can be achieved. By providing a touch sensation that is completely different from that of a typical keyboard instrument, the performer can have a new playing experience.

[0035] <Modification> Although one embodiment of the present invention has been described above, this embodiment can be modified in various ways as described below. The above-described embodiment and the modifications described below can also be applied in combination with each other. Furthermore, some of the configurations of the above-described embodiment can be added to, deleted from, or replaced with other configurations.

[0036] (1) The fluid load unit 20 may be configured to be linked to the key 70, for example, connected to the rotation load unit 50.

[0037] FIG. 8 is a diagram illustrating the configuration of a keyboard section in a modified example. FIG. 9 is a diagram illustrating the operation of a keyboard section in a modified example. Keyboard section 10A includes a fluid load section 20A that applies fluid resistance in response to the rotation of rotation load section 50. Fluid load section 20A has a structure similar to that of fluid load section 20 turned upside down, with a connecting rod 25A disposed at the lower end of moving body 21A. Connecting rod 25A protrudes below holding section 23A, which holds fluid 29A. At the lower end of the protruding connecting rod 25A, connecting section 27A is in slidable contact with rod-shaped member 51. Connecting section 27A and rod-shaped member 51 are merely in contact with each other but are not connected, but may be connected like the relationship between key 70 and connecting section 27 in the embodiment.

[0038] According to keyboard unit 10A, when key 70 is pressed, the portion of rod-shaped member 51 in rotation load unit 50 that contacts connecting portion 27A rises. As a result, connecting rod 25A is pushed up via connecting portion 27A, and moving body 21A moves upward through fluid 29A. When key 70 returns to the rest position, the portion of rod-shaped member 51 that contacts connecting portion 27A moves downward, and then moving body 21A moves downward due to its own weight. When rod-shaped member 51 and connecting portion 27A are connected, connecting rod 25A and moving body 21A are pulled down by rod-shaped member 51.

[0039] In this way, the direction of movement of the moving body when the key 70 is pressed is not limited to vertically downward, but may be vertically upward. The direction of movement may also be inclined relative to the vertical, or may be horizontal.

[0040] (2) The fluid loading unit 20 may further include a configuration that applies a force in a direction that returns the key 70 to the rest position.

[0041] Fig. 10 is a diagram illustrating the configuration of a fluid loading section in a modified example. The fluid loading section 20B shown in Fig. 10 further includes an elastic body 22 connected between the bottom surface 21b of the moving body 21 and the inner bottom surface 23b of the holding section 23. The elastic body 22 is, for example, a spring, and is compressed when the moving body 21 moves downward, generating a restoring force that returns the moving body 21 to its upward position. The elastic body 22 may be arranged so that when the moving body 21 moves downward, the elastic body 22 expands, utilizing the restoring force.

[0042] (3) The movable body 21 may have a recess on the tip side in the direction of movement when the key 70 is pressed. For example, the bottom surface 21b of the movable body 21 may have a recess instead of being flat.

[0043] FIG. 11 is a diagram illustrating the configuration of a fluid loading section in a modified example. The fluid loading section 20C shown in FIG. 11 includes a bottom surface 21bC with a recess formed therein. The bottom surface 21bC has a curved surface with the central portion recessed upward from the outer periphery. This curved surface has a shape obtained by cutting out a portion of a sphere. This recess can increase the resistance that the moving body 21C receives from the fluid 29 when moving downward compared to the moving body 21 described above.

[0044] (4) As long as it is maintained that the resistance when the moving body 21 moves downward is greater than when the moving body 21 moves upward, another structure may be attached to the bottom surface 21b of the moving body 21.

[0045] FIG. 12 is a diagram illustrating the configuration of a fluid loading section in a modified example. The fluid loading section 20D shown in FIG. 12 includes a moving body 21D having a structure 21c coupled to a bottom surface 21b. The structure 21c is a thin, cylindrical member having a diameter smaller than the diameter of the bottom surface 21b. In the example shown in FIG. 12, when the key 70 is in the end position, the structure 21c contacts the inner bottom surface 23b of the holder 23. In this case, the structure 21c can also be used as a substitute for the upper limit stopper 62. The structure 21c may be an elastic body.

[0046] (5) The interior of the moving body 21 may or may not be filled.

[0047] Fig. 13 is a diagram illustrating the configuration of a fluid loading section in a modified example. The fluid loading section 20E shown in Fig. 13 includes a moving body 21E having a cavity 21d formed therein. The formation of the cavity 21d reduces the weight of the moving body 21E. This reduction in weight allows the buoyancy force that the moving body 21E receives from the fluid 29 to be effectively used as a force for returning the key 70 to the rest position.

[0048] (6) The length of the moving body 21 in the direction D2 is limited depending on the size of the key 70, but the length in the direction D3 may be increased.

[0049] FIG. 14 is a diagram illustrating the configuration of a keyboard section in a modified example. The keyboard section 10E in FIG. 14 includes a fluid load section 20F that expands in direction D3 compared to the fluid load section 20. The fluid load section 20F includes a moving body 21F that extends in direction D3 and a holding section 23F that is shaped to accommodate the moving body 21F. The moving body 21F has a generally triangular prism shape that extends in direction D3. A bottom surface 21bF of the moving body 21F corresponds to one of the side surfaces of the triangular prism. By expanding in direction D3, i.e., the longitudinal direction of the key 70, the moving body 21F can experience greater fluid resistance than the moving body 21 in the fluid load section 20.

[0050] (7) The connection between the connecting portion 27 and the moving body 21 is not limited to the case where the connection is made by the connecting rod 25, but may be made indirectly. For example, a configuration for changing the direction of force may be included, as in the relationship between the key 70 and the rotation load portion 50.

[0051] Fig. 15 is a diagram illustrating the configuration of a keyboard section in a modified example. The keyboard section 10G in Fig. 15 includes a fluid load section 20G in which a moving body 21 moves horizontally. The moving body 21 and connection section 27 in the fluid load section 20G include two connecting rods 25aG and 25bG and a direction changer 250. The direction changer 250 is disposed between the connecting rods 25aG and 25bG and has a mechanism for interlocking the connecting rods 25aG and 25bG. The direction changer 250 has a direction change mechanism, such as a gear, that moves the connecting rod 25bG in the rearward direction (direction D3) when the connecting rod 25aG moves downward (direction D1).

[0052] When connecting rod 25aG and connecting rod 25bG move in conjunction with each other, the distances they move may be the same or different. For example, by configuring direction changer 250 so that connecting rod 25bG moves by twice the distance of connecting rod 25aG, the distance that moving body 21 moves through fluid 29 can be increased.

[0053] (8) The above-described keyboard section 10 does not necessarily need to have the rotation load section 50. In that case, it is preferable that a structure be provided in the keyboard section 10 that applies a force to return the key 70 from the end position to the rest position.

[0054] (9) Fluid 29 may be a liquid other than oil, such as water, or may be a gas. Furthermore, fluid 29 held in holding unit 23 may be a plurality of types of fluid. Holding unit 23 may hold fluid 29 that is a combination of different types of liquids, or may hold fluid 29 that is a combination of liquid and gas. Fluid 29 may be an aggregate of fine particulate solids such as sand, or may be a dilatant fluid.

[0055] (10) In one area where the holding unit 23 holds the fluid 29, not only a plurality of moving bodies 21 may be arranged, but also one moving body 21 may be arranged.

[0056] (11) The holding unit 23 may include an exchange port for removing the fluid 29 from the holding unit 23 and adding a different fluid 29. The fluid resistance may be changed by exchanging the fluid 29, thereby changing the touch sensation. The fluid 29 may be exchanged by exchanging the entire fluid loading unit 20. The moving body 21 may be exchangeable for one with a different shape. In this case, the moving body 21 may also be exchanged by exchanging the entire fluid loading unit 20.

[0057] (12) The sound generating unit 80 does not have to be configured to generate sound by striking a sound generating body. For example, it may be configured to generate electronic sounds using an electronic sound source based on an operation signal.

[0058] (13) The connection part 27 does not necessarily have to be connected to the key 70, but may simply be in contact with the key 70. In this case, when the key 70 is pressed from the rest position toward the end position, the connection part 27 is pressed by the key 70, causing the moving body 21 to move downward. On the other hand, when the key 70 returns from the end position to the rest position, the connection part 27 and the key 70 separate, and the key 70 returns to the rest position first, after which the connection part 27 comes into contact with the key 70.

[0059] In one embodiment, the force pushing the movable body 21 upward in the case of the fluid loading unit 20 is only the buoyancy of the fluid 29. Therefore, it is preferable to add a configuration that generates a force pushing the movable body 21 upward so that the connection unit 27 can follow the movement of the key 70 when it returns to the rest position. [Explanation of symbols]

[0060] 1: keyboard device, 10: keyboard section, 20: fluid load section, 21: moving body, 23: holding section, 25: connecting rod, 27: connecting section, 29: fluid, 40: frame, 50: rotation load section, 51: rod-shaped member, 55: shaft, 56: weight section, 57: connecting section, 61: lower limit stopper, 62: upper limit stopper, 70: key, 73: shaft, 75: connecting section, 80: sound generation section

Claims

1. a first key arranged to be depressible; a holding portion for surrounding and holding the fluid; a first moving body configured to receive a force when the first key is pressed and move in a first direction through the fluid; Including, The first movable body has a shape such that the force it receives from the fluid when it moves in the first direction is greater than the force it receives from the fluid when it moves in a second direction opposite to the first direction. keyboard device.

2. a second key disposed adjacent to the first key and capable of being depressed; a second moving body that receives a force when the second key is pressed and moves in the first direction through the fluid; further comprising The fluid in which the first moving body and the second moving body move is surrounded by the holding portion in one region.

2. The keyboard device according to claim 1.

3. A sounding body and a striking section for striking the sound-producing body; a detection unit for detecting that the first key is pressed; a control unit that controls the striking unit to strike the sound generating body in accordance with the detection result of the first key; 3. The keyboard device according to claim 1, further comprising:

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