Rotary mechanism and keyboard assembly

Abstract

Rotating mechanism, featuring: a wave segment (520); a bearing section (220) configured to rotate with respect to a predetermined axis as center of rotation (600) and configured to slide relative to an outer circumference of the shaft section (520); a protruding section (530) that extends out of the wave section (520); and a stop (240) which is formed integrally with the bearing section (220), wherein the stop (240) faces the protruding section (530) and the protruding section (530) extends from the shaft section (520) in the direction of the stop (240), wherein a length of the protruding section (530) in the direction in which the protruding section (530) protrudes is greater than a distance from the center of rotation (600) to a sliding section in which the bearing section (220) slides relative to the outer circumference of the shaft section (520).

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is based on and claims the benefit of priority from prior Japanese Patent Application No. 2020-018088 filed on February 5, 2020, the entire contents of which are hereby incorporated by reference. AREA

[0002] One embodiment of the present disclosure relates to a rotary mechanism and a keyboard device. More specifically, one embodiment of the present disclosure relates to a keyboard device having a hammer assembly mounted using a rotary mechanism. STATE OF THE ART

[0003] Acoustic pianos, like conventional grand pianos and upright pianos, consist of many parts. Assembling these parts is so complex that the assembly work takes a long time. Especially since the action mechanism, which is provided for each key, consists of many components, the assembly process is also very complicated.

[0004] The action mechanism includes a hammer with a weight below the key to provide feel to the player's fingers through the key (hereinafter referred to as touch feel). The hammer rotates to raise the weight provided on the hammer in response to a keystroke operation of the key. For example, a hammer shown in Japanese Patent Publication JP 2017-173706 A and International Publication WO 2018 / 174001 A1 is rotatably mounted in a case where a circularly opened bearing portion is attached to a shaft portion. The hammer has a shaft stopper extending from the bearing portion to the shaft portion. The shaft stopper suppresses the detachment of the hammer from the shaft portion.US 2019 / 0378486 A1 discloses a rotating mechanism in which a section protruding from a shaft, arranged substantially orthogonally to a stop, serves to reinforce the corresponding area of ​​the shaft against breakage. Another rotating mechanism is known from US 2019 / 0043463 A1, in which a flexible element is supported against a shaft section to prevent unintentional detachment of the bearing from the shaft under strong external force. SUMMARY

[0005] A rotating mechanism according to the present invention is defined in claim 1. Another rotating mechanism according to the present invention is defined in claim 3. Another rotating mechanism according to the present invention is defined in claim 7. Another rotating mechanism according to the present invention is defined in claim 8. Another rotating mechanism according to the present invention is defined in claim 18.

[0006] Advantageous embodiments can be implemented according to the subclaims.

[0007] A keyboard device according to an embodiment of the present disclosure includes a key, a hammer assembly, a sensor, and a sound source unit. The hammer assembly is rotated by the aforementioned rotation mechanism in response to a key press. The sensor is configured to detect an operation of the key. The sound source unit is configured to generate a sound waveform signal in response to an output signal from the sensor. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a configuration of a keyboard device according to an embodiment of the present disclosure; Fig. 2 is a block diagram showing a configuration of a sound source device according to an embodiment of the present disclosure; Fig. 3 is a side view of an internal configuration of a housing according to an embodiment of the present disclosure; Fig. 4 is a partial enlarged view of a rotating mechanism in an embodiment of the present disclosure, showing a state of a bearing portion attached to a shaft portion; Fig. 5 is an enlarged partial view of a rotating mechanism in one embodiment of the present disclosure and is an exploded view showing only a bearing portion; Fig. 6 is a diagram showing a state in a case where a rotary member intends to detach from a shaft portion according to an embodiment of the present disclosure; Fig. 7 is a diagram illustrating an operation of a key arrangement when a key (white key) is not pressed (when a key is released) in an embodiment of the present disclosure; Fig. 8 is a diagram illustrating an operation of a key arrangement when a key (white key) is pressed in an embodiment of the present disclosure (when a key is pressed); Fig. 9 is a diagram illustrating a positional relationship between a protruding portion and a stopper and a positional relationship between an opening of a bearing portion and a protruding portion in a rotating state in a rotating mechanism according to an embodiment of the present disclosure; Fig. 10 is a diagram illustrating a positional relationship between a protruding portion and a stopper and a positional relationship between an opening of a bearing portion and a protruding portion in a rotating state in a rotating mechanism according to an embodiment of the present disclosure; Fig. 11 is a perspective view of a shaft portion of a rotary mechanism according to an embodiment of the present disclosure; Fig. 12 is a plan view showing a hammer assembly and a shaft portion according to an embodiment of the present disclosure; Fig. 13 is a cross-sectional view showing a hammer assembly and a shaft portion according to an embodiment of the present disclosure; Fig. 14 is a side view of a shaft portion and a protruding portion of a rotating mechanism according to an embodiment of the present disclosure; Fig. 15 is a diagram showing a state in a case where a rotary member intends to detach from a shaft portion according to an embodiment of the present disclosure; Fig. 16 is a diagram showing a state in a case where a rotary member intends to detach from a shaft portion according to an embodiment of the present disclosure; Fig. 17 is a diagram showing a state in a case where a rotary member intends to detach from a shaft portion according to an embodiment of the present disclosure; Fig. 18 is a diagram showing a state in a case where a rotary member intends to detach from a shaft portion according to an embodiment of the present disclosure; Fig. 19 is a diagram showing a state in a case where a rotary member intends to detach from a shaft portion according to an embodiment of the present disclosure; Fig. 20 is a diagram showing a state in a case where a rotary member intends to detach from a shaft portion according to an embodiment of the present disclosure; Fig. 21 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure; Fig. 22 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure; Fig. 23 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure; Fig. 24 is a cross-sectional view showing a hammer assembly and a shaft portion according to an embodiment of the present disclosure; Fig. 25 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure; Fig. 26 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure; Fig. 27 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure; Fig. 28 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure; Fig. 29 is a plan view showing a hammer assembly and a shaft portion according to an embodiment of the present disclosure; and Fig. 30 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0008] Hereinafter, a keyboard device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. The following embodiments are examples of embodiments of the present disclosure, and the present disclosure should not be construed as being limited to these embodiments. In the drawings referred to in the present embodiment, the same portions or portions having similar functions are denoted by the same reference numerals or similar reference numerals (only A, B, etc. are placed after numbers). Repeated descriptions of the above symbols may be omitted.For the convenience of description, the dimensional relationships in the drawings (relationships between respective components, relationships in the vertical and horizontal directions, and the like) may differ from the actual relationships, or some configurations may be omitted from the drawings. In the following explanation, "rotating" means a relative operation. For example, "element A rotates relative to element B" may mean that element B rotates relative to a fixed element A, element A rotates relative to an inverted fixed element B, and elements A and B both rotate. In the following descriptions, the terms "top", "upper / upper / upper", "top end", "bottom", "lower / lower / lower", and "bottom end" may be used based on the vertical directions in the respective drawings.However, these vertical directions only explain the relationship of the relative directions, and the vertical directions can be reversed. <Erste Ausführungsform> [Keyboard Device Configuration]

[0009] Fig. 1 is a diagram showing a configuration of a keyboard device according to the first embodiment. In this embodiment, a keyboard device 1 is an electronic keyboard instrument, such as an electronic piano, that outputs a sound in response to a keystroke by a user (player). The keyboard device 1 may be a keyboard-type controller that outputs control data (e.g., MIDI) for controlling an external sound source device in response to a keystroke. In this case, the keyboard device 1 may not include a sound source device.

[0010] The keyboard device 1 includes a keyboard arrangement 10. The keyboard arrangement 10 includes a white key 100w and a black key 100b. A plurality of white keys 100w and a plurality of black keys 100b are arranged side by side. The number of keys 100 is N, in this example, N is 88. A direction in which the plurality of white keys 100w and the plurality of black keys 100b are arranged is called a scale direction. When the white key 100w and the black key 100b are not particularly distinguished from each other, the white key 100w and the black key 100b are referred to as keys 100. In the following description, a configuration with "w" at the end of a symbol is a configuration corresponding to the white key. A configuration with "b" at the end of a symbol is a configuration corresponding to the black key.

[0011] A part of the keyboard assembly 10 exists in a casing 90. When the keyboard device 1 is viewed from above, a portion of the keyboard assembly 10 covered by the casing 90 is referred to as a non-appearing portion NV, and a portion exposed by the casing 90 and visible to the user is referred to as an appearing portion PV. That is, the appearing portion PV is a part of the keys 100 and indicates a range that can be played and operated by the user. Hereinafter, a portion of the keys 100 exposed in the appearing portion PV may be referred to as a key body portion.

[0012] A sound source device 70 and a speaker 80 are arranged within the housing 90. The sound source device 70 generates an acoustic waveform signal upon pressing the keys 100. The speaker 80 outputs the acoustic waveform signal generated by the sound source device 70 to an external space. The keyboard device 1 may include a slider for controlling the volume, a switch for switching tones, a display for displaying various data, and the like.

[0013] According to the descriptions in this patent document, the directions such as up, down, left, right, front, and back indicate the directions in which the keyboard device 1 is viewed from the player when the player plays the keyboard device 1. For example, it can be expressed that the non-appearing portion NV is located on the back of the appearing portion PV. In some cases, the direction is specified based on the keys 100, such as the key front (front of the keys) or the key back (back of the keys). In this case, the key front is the front of the keys 100 as viewed from the player. The key back is the back of the keys 100 as viewed from the player. According to the above definitions, it can be expressed that the portion of the black key 100b protrudes upward from the front end to the back end of the key body portion of the black key 100b from the white key 100w.

[0014] Fig. Figure 2 is a block diagram showing a configuration of the sound source device according to the first embodiment. The sound source device 70 includes a signal converter 710, a sound source unit 730, and an output unit 750. A sensor 300 is provided corresponding to each key 100. The sensor 300 detects a key press and outputs a signal corresponding to the detected content. In this example, the sensor 300 outputs signals according to the three-stage key press amount. Depending on the time interval of these signals, a key press rate can be detected.

[0015] The signal converter 710 detects an output signal from the sensor 300 (the sensors 300-1 and 300-2, ..., 300-88 correspond to the 88 keys 100) and generates and outputs an operation signal corresponding to the operation state of each key 100. In this case, the operation signal is a signal in the form of MIDI. The signal converter 710 outputs a note-on in response to a key press operation. A key number indicating which of the 88 keys 100 was operated and a speed corresponding to the key press rate are output in association with the note-on. On the other hand, in response to a key release operation, the signal converter 710 outputs the key number and note-off in association with each other. A signal corresponding to other operations, such as a pedal, can be input to the signal converter 710 and can be reflected in the operation signal.

[0016] The sound source unit 730 generates the acoustic waveform signal based on the actuation signal output from the signal converter 710. The output unit 750 outputs the acoustic waveform signal generated by the sound source unit 730. The acoustic waveform signal is output to, for example, the speaker 80 or an acoustic waveform signal output terminal. [Keyboard Layout Configuration]

[0017] Fig. 3 is a side view of an internal configuration of the housing according to the first embodiment. As shown in Fig. As shown in Figure 3, the keyboard assembly 10 and the speaker 80 are arranged in the housing 90. The speaker 80 is arranged on the back of the keyboard assembly 10. The speaker 80 is arranged to output a sound corresponding to the key presses toward the top and bottom of the housing 90. The downward sound output is from the bottom surface of the housing 90 to the outside. On the other hand, the sound output goes from the inside of the housing 90 upward through the space within the keyboard assembly 10 and further outward from the gaps between the adjacent keys 100 in the appearing section PV or the gaps between the key 100 and the housing 90.

[0018] The configuration of the keyboard assembly 10 will be described with reference to Fig. 3. In addition to the keys 100 described above, the keyboard assembly 10 includes a connecting portion 180, a hammer assembly 200, and a frame 500. The keyboard assembly 10 is a resin structure that, in most configurations, is manufactured by injection molding or the like. The frame 500 is attached to the housing 90. The connecting portion 180 rotatably connects the keys 100 to the frame 500. The connecting portion 180 includes a plate-shaped flexible member 181, a key-side support portion 183, and a pivot member 185. The plate-shaped flexible member 181 extends rearward from the rear end of the keys 100. The key-side support portion 183 extends rearward from the rear end of the plate-shaped flexible member 181. The rotary member 185 is supported by the key-side support portion 183 and a frame-side support portion 585 of the frame 500.That is, the rotating member 185 is disposed between the keys 100 and the frame 500. Bending the rotating member 185 causes the keys 100 to rotate relative to the frame 500. The rotating member 185 is detachable from the key-side support portion 183 and the frame-side support portion 585. The rotating member 185 may be integral with the key-side support portion 183 and the frame-side support portion 585, and may be connected to the key-side support portion 183 and the frame-side support portion 585. That is, the rotating member 185 may be configured so that it is not detachable from the key-side support portion 183 and the frame-side support portion 585.

[0019] The key 100 includes a front key guide 151 and a side surface key guide 153. The front key guide 151 is slidably in contact with a front frame guide 511 of the frame 500 in the state of covering the front frame guide 511. The front key guide 151 contacts the front frame guide 511 on both sides in the scale direction at the upper and lower parts of the front key guide 151. The side surface key guide 153 is slidably in contact with a side surface frame guide 513 on both sides of the side surface frame guide 513. In this embodiment, the side surface key guide 153 is arranged in an area of ​​the side surface of the keys 100 corresponding to the non-appearance portion NV and is closer to the key front than to the connecting portion 180 (the plate-shaped flexible member 181).However, the side surface key guide 153 may be arranged in an area corresponding to the appearing portion PV.

[0020] The hammer assembly 200 is rotatably mounted on the frame 500. Thus, the hammer assembly 200 can be referred to as a "rotating member." The hammer assembly 200 rotates while a bearing portion 220 of the hammer assembly 200 and a shaft portion 520 of the frame 500 slide. Specifically, from the perspective of the direction in which the shaft portion 520 extends, the bearing portion 220 rotates with the shaft portion 520 as the center of rotation while sliding with an outer periphery of the shaft portion 520. A front portion 210 of the hammer assembly 200 slidably contacts generally an anterior-posterior direction in the interior of a hammer support unit 120 in the keys 100. This sliding portion, that is, a part where the front portion 210 and the hammer support unit 120 contact each other, is located below the key 100 in the appearing portion PV (in front of the rear end of the key body portion).Configurations of the connecting part (rotation mechanism) of the shaft portion 520 and the bearing portion 220 will be described in detail later.

[0021] The hammer assembly 200 includes a metallic weight portion 230 at the rear of the rotating shaft. Normally (when the key is not pressed), the weight portion 230 is in a state where it is disposed on a lower stopper 410, and the front portion 210 of the hammer assembly 200 pushes the key 100 upward. When the key is pressed, the weight portion 230 is moved upward and collides with an upper stopper 430. The hammer assembly 200 exerts a weight on the player who presses the keys around the weight portion 230. The lower stopper 410 and the upper stopper 430 are formed of a cushioning material or the like (non-woven fabric, elastic body, or the like).

[0022] The sensor 300 is mounted on the frame 500 below the hammer support unit 120 and the front portion 210. When the sensor 300 is squeezed by a key press on the lower surface of the front portion 210, the sensor 300 outputs a detection signal. As described above, the sensor 300 is provided corresponding to each key 100. [Configuration of the hammer assembly rotation mechanism]

[0023] Fig. 4 and Fig. 5 are enlarged partial views of the rotating mechanism according to an embodiment of the present disclosure. Fig. 4 is a diagram showing a state in which the bearing portion 220 is attached to the shaft portion 520. Fig. 5 is an exploded view showing only the bearing portion 220. A configuration in which the hammer assembly 200 is connected to the shaft portion 520 will be described in detail with reference to FIG. Fig. 4 and Fig. 5 described.

[0024] For example, a large load is applied to a rotating shaft of a rotary mechanism such as a hammer element or the like, as shown in Japanese Patent Publication No. 2017-173706 and International Publication No. 2018-174001. For example, when the hammer rotates in response to excessively strong keystrokes, the rotating shaft of the hammer may be subjected to an excessively large load, and the rotating shaft may be damaged. One of the objects of the present disclosure is to realize a rotary mechanism with high mechanical strength in which the bearing portion is hardly detached from the shaft portion, and the above object is achieved by the rotary mechanism used in the following hammer assembly 200.

[0025] The hammer assembly 200 includes the bearing portion 220, a stopper 240, a connecting portion 250, and a body portion 260. The bearing portion 220 and the stopper 240 are connected via the connecting portion 250 and the body portion 260 and move or rotate integrally. The bearing portion 220 extends downward from the body portion 260 and has a shape that can hold the shaft portion 520. The connecting portion 250 extends downward from the body portion 260. The stopper 240 is connected to a lower end of the connecting portion 250 and extends from the connecting portion 250 to the bearing portion 220. In particular, the stopper 240 extends toward a rotation center 600 of the shaft portion 520. The stopper 240 has flexibility. The bearing portion 220 is attached to the shaft portion 520 by bending the stopper 240.The direction in which the stopper 240 is curved is a direction that intersects the direction connecting a tip portion of the stopper 240 and the rotation center 600. The stopper 240 is not curved in a direction in which the bearing portion 220 is detached from the shaft portion 520. That is, even if the bearing portion 220 is intended to detach from the shaft portion 520 and the stopper 240 is pressed by a stopper contact portion (stopper contact portion) 531 that is part of a protruding portion 530, the stopper 240 is not curved, so detachment of the bearing portion 220 from the shaft portion 520 is suppressed.

[0026] As in Fig. As shown in Figure 5, an opening 229 for holding the shaft portion 520 is provided in the bearing portion 220. An inner surface of the opening 229 is a part of an arc (circular arc) of a circle L1. A center of the circle L1 is the rotation center 600, and a radius of the circle L1 is r1. As shown in Fig. 4, the rotation center 600 exists within the shaft portion 520. A concave portion 522 is provided on a part of the inner surface of the opening 229. That is, the inner surface of the opening 229, except for the concave portion 522, has a continuous arc shape from an opening end portion 610 to an opening end portion 620. The concave portion 522 can be used as a grease reservoir.

[0027] The protruding portion 530 is provided at one end portion of the shaft portion 520. The shaft portion 520 extends in the scale direction and is connected to a wall member 590, which will be described later (see Fig. 12). An outer surface of the shaft portion 520 is a part of the circular arc L1 around the rotation center 600. The protruding portion 530 extends from the shaft portion 520 toward the stopper 240. The protruding portion 530 extends from an inner side of the circle L1 to an outer side of the above-described circle L1 through between the opening end portions 610, 620. In other words, the protruding portion 530 protrudes outward from the shaft portion 520 from the rotation center 600 because the length of the protruding portion 530 protruding from the rotation center 600 toward the stopper 240 is greater than the distance from the rotation center 600 to a sliding portion where the bearing portion 220 slides relative to the outer periphery of the shaft portion 520. Here, the sliding portion is a portion in which the bearing portion 220 slides relative to the shaft portion 520.For example, a part where the bearing portion 220 slides relative to the shaft portion 520 at the opening end portions 610, 620 and a contact point 630 described below may be referred to as a sliding portion. The protruding portion 530 is contactable with the stopper 240 within a rotation range of the bearing portion 220 relative to the shaft portion 520. The stopper contact portion 531 is a tip portion of the protruding portion 530 and is a portion that contacts the stopper 240 when the bearing portion 220 is intended to detach from the shaft portion 520. The stopper contact portion 531 extends in a direction intersecting the direction in which the protruding portion 530 protrudes from the shaft portion 520. Specifically, the shape of the stopper contact portion 531 is a part of a circular arc L2. A center of the circle L2 is the center of rotation 600, and a radius of the circle L2 is r2.

[0028] A rotation mechanism 900 is configured by the bearing portion 220, the shaft portion 520, the protruding portion 530, and the stopper 240. In the following description, a configuration will be described in which the bearing portion 220 fixed to the hammer assembly 200 rotates relative to the shaft portion 520 fixed to the frame 500. However, in the following embodiments, the rotation mechanism 900 may be applied to a configuration in which the bearing portion 220 is fixed to the frame 500 and the shaft portion 520 is fixed to the hammer assembly 200.

[0029] The bearing portion 220 rotates around the shaft portion 520 while sliding with the shaft portion 520. In other words, the shaft portion 520 is held by the bearing portion 220 inscribed in the opening 229. The bearing portion 220 is attached to the shaft portion 520 in a snap-fit ​​manner. That is, a distance between the opening end portions 610 and 620 of the bearing portion 220 is smaller than a diameter of the shaft portion 520. In the rotation range of the hammer assembly 200, the inner surface of the opening 229 and the outer surface of the shaft portion 520 are part of the circular arc L1 centered on the rotation center 600 of the shaft portion 520.

[0030] In Fig. 4 and Fig. 5, since both the inner surface of the opening 229 and the outer surface of the shaft portion 520 are part of the circular arc L1, the bearing portion 220 and the shaft portion 520 slide within the range of the arc. The rotation center 600 exists on a triangle T formed by any three points (e.g., two contact points in the opening end portions 610, 620 and the contact point 630) of a point or a range where the shaft portion 520 and the bearing portion 220 slide, so that the bearing portion 220 rotates in a case where the bearing portion 220 supports the shaft portion 520 as described above. That is, the rotation center 600 exists on three sides of the triangle T or in a range surrounded by the three sides of the triangle T. In other words, any angle formed by the straight lines extending from the center of rotation 600 to the three points is 180 degrees or less.Since, in the present embodiment, all three points are located on the inner surface of the opening 229, it can be said that the bearing portion 220 covers the shaft portion 520, so that the three points are continuously connected. In this case, it can be said that the protruding portion 530 protrudes to the outside of the circle L1 through a region where the bearing portion 220 is not continuous, that is, between the opening end portions 610, 620 of the opening 229.

[0031] The protruding portion 530 protrudes from the circle L1 with respect to the rotation center 600. In other words, when the three points are defined as described above, the protruding portion 530 can be said to protrude further with respect to the rotation center 600 than any of the three points. In other words, the distance from the rotation center 600 to the stopper contact portion 531 is greater than the distance from the rotation center 600 to each sliding portion. When the distances from the rotation center 600 to the three points are different from each other, the protruding portion 530 protrudes from a circle whose center is the rotation center 600, and the circle passes through a point farthest from the rotation center 600 among the three points.

[0032] Fig. 6 is a diagram illustrating a state in which the rotary member intends to detach from the shaft portion according to an embodiment of the present disclosure. When a strong external force is applied to the rotary mechanism 900 in a direction that separates the shaft portion 520 and the bearing portion 220 from each other, the bearing portion 220 moves in a direction to tend to detach from the shaft 520 while widening the gap between the opening end portions 610, 620 of the shaft 520. With this movement, the stopper 240 moves closer to the shaft portion 520. In a state in which the shaft portion 520 is normally held by the bearing portion 220 (which is shown in Fig. 4), as described above, the center of rotation 600 lies on a triangle formed by any three points of the point or area in which the shaft portion 520 and the bearing portion 220 slide. However, the shaft portion 520 and the bearing portion 220 only touch at two points when the bearing portion 220 tends to detach from the shaft portion 520, as shown in Fig. 6. That is, in a state where the bearing portion 220 tends to detach from the shaft portion 520, the shaft portion 520 and the bearing portion 220 are in the above-described state in which they are normally held, without contact at at least one of the three contact points. In this state, the stopper 240 and the stopper contact portion 531 are configured to contact each other. By contacting the stopper 240 with the stopper contact portion 531, the above-mentioned movement is restricted. Fig. Figure 6 is a diagram showing this condition.

[0033] As described above, even if the bearing portion 220 intends to detach from the shaft portion 520 in front of the rotation center 600 outward beyond a line segment 615 connecting the opening end portions 610, 620 from the opening 229, the stopper 240 contacts the stopper contact portion 531. In other words, in a state where the stopper contact portion 531 and the stopper 240 are configured to contact each other, a distance from the rotation center 600 to the stopper 240 exceeds a distance from the line segment 615 connecting the opening end portions 610, 620 corresponding to both ends of the bearing portion 220 in contact with the shaft portion 520 to the stopper 240. In this state, the opening end portions 610, 620 pushed out by the shaft portion 520 intend to detach from the Restoring force of the bearing section 220 to return to its original shape. If the stop 240 is in a Fig. 6 and the movement of the bearing portion 220 is restricted, the bearing portion 220 intends to return to the original state (the state shown in Fig. 4 shown state).

[0034] In the present embodiment, a configuration in which the stopper 240 extends from the lower end of the connecting portion 250 to the rotation center 600 is exemplified, but the present invention is not limited to this configuration. The stopper 240 may contact the stopper contact portion 531 when the bearing portion 220 intends to detach from the shaft portion 520, and does not necessarily have to extend toward the rotation center 600. In the present embodiment, a configuration in which both shapes in the range where the bearing portion 220 and the shaft portion 520 slide are arcuate is exemplified, but it is not limited to this configuration. For example, one of the bearing portions 220 and the shaft portion 520 may be in point contact with the other.That is, the bearing portion 220 or the shaft portion 520 may be provided with a protrusion portion that realizes point contact. In the present embodiment, a configuration is exemplified in which the contact points (610, 620, 630) between the bearing portion 220 and the shaft portion 520 are the distance of the radius r1 from the rotation center 600, but it is not limited to this configuration. For example, the distances from the rotation center 600 to each of the three contact points where the bearing portion 220 and the shaft portion 520 contact each other may be different. That is, the concave portion recessed further inside the circle L1 than the circular arc L1 on the outer circumference of the bearing portion 220 may be provided. The concave portion can be used as a lubricant.

[0035] In the present embodiment, a configuration in which the vertical width of the stopper contact portion 531 is larger than the vertical width of the other portion of the protruding portion 530 is exemplified, but is not limited to this configuration. That is, the vertical width of the protruding portion 530 must not change from the shaft portion 520 to the stopper contact portion 531. The shape of the stopper contact portion 531 must not be part of the circular arc L2.

[0036] As described above, according to the rotation mechanism 900 of the present embodiment, by bringing the stopper 240 into contact with the protruding portion 530 (the stopper contact portion 531), even when a strong external force is applied in a direction to separate the shaft portion 520 and the bearing portion 220 from each other, the detachment of the bearing portion 220 from the stopper 240 is suppressed. Therefore, the rotation mechanism in which the bearing portion 220 is hardly detached from the shaft portion 520 is realized. Furthermore, the mechanical strength of the shaft portion 520 is improved by providing the protruding portion 530 in the shaft portion 520.

[0037] Since the concave portion 522 is provided on the inner surface of the opening 229, the contact area between the bearing portion 220 and the shaft portion 520 is reduced, so that the frictional force in the rotational operation of the bearing portion 220 and the shaft portion 520 is reduced. A concave portion may be provided on the outer periphery of the shaft portion 520 instead of the concave portion 522. [Operating the keyboard layout 10]

[0038] Fig. 7 and Fig. 8 are diagrams illustrating an operation of the key array when the key (white key) is pressed according to an embodiment of the present disclosure. Fig. 7 is a diagram showing a case where the key 100 is in a rest position (a state where the key is not pressed). Fig. 8 is a diagram showing a case where the key 100 is in a final position (a state where the key is pressed to the end). When the key 100 is pressed, a part of the rotary member 185 is bent relative to the rotary member 185 as the rotation center. In this state, although the bending deformation is caused in front of the key (toward the forward direction), the key 100 does not move forward but rotates relative to the rotary member 185 due to the restriction of movement in the anterior-posterior direction by the side surface key guide 153. The hammer support unit 120 presses the front portion 210, so that the hammer assembly 200 rotates relative to the shaft portion 520. Due to the collision of the weight portion 230 with the upper stopper 430, the rotation of the hammer assembly 200 stops, and the key 100 reaches the final position.When the sensor 300 is pressed by the front portion 210, the sensor 300 outputs a detection signal in multiple stages corresponding to the pressed amount (key press amount).

[0039] On the other hand, when the key is released, the weight portion 230 moves downward, the hammer assembly 200 rotates, and the key 100 rotates upward. When the weight portion 230 touches the lower stopper 410, the rotation of the hammer assembly 200 stops and the key 100 returns to the rest position. In the keyboard device 1 in the first embodiment, as described above, the key 100 rotates relative to the connecting portion 180 by pressing and releasing the key 100. [State of the rotary mechanism 900 with operation of the keyboard assembly 10]

[0040] Fig. 9 and Fig. 10 are diagrams illustrating the positional relationship between the protruding portion and the stopper and the positional relationship between the opening of the support portion and the protruding portion in each rotation state in the rotation mechanism in one embodiment of the present disclosure. Fig. Fig. 9 shows a state of the rotary mechanism 900 when the key 100 is in the rest position as in Fig. 7 is located. Fig. 10 shows a state of the rotary mechanism 900 when the button 100 is in the end position as in Fig. 8 is located.

[0041] As in Fig. 9 and Fig. 10, the protruding portion 530 (or the stopper contact portion 531) is located in the rotation range of the rotating mechanism 900 on a straight line connecting a tip portion 241 of the stopper 240 and the rotation center 600. As described above, the shape of the stopper contact portion 531 of the protruding portion 530 is a part of the circular arc L2 with the radius r2. The center of the circle L2 is the rotation center 600. Therefore, in the rest position of Fig. 9 and the final position of Fig. 10, the distance between the tip portion 241 of the stopper 240 and the stopper contact portion 531 is equal. That is, the distance d1 between the tip portion 241 and the stopper contact portion 531 in Fig. 9 is the same as the distance d2 between the tip portion 241 and the stopper contact portion 531 in Fig. 10. Therefore, in the rotation range of the rotary mechanism 900, even if the bearing portion 220 intends to detach from the shaft portion 520 in any state from the rest position to the end position, the stopper 240 contacts the protruding portion 530 under the condition that the bearing portion 220 intends to return to the original state by the restoring force of the bearing portion 220.

[0042] The protruding portion 530 is provided between the opening end portion 620 in the above-described rest position and the opening end portion 610 in the end position. That is, as shown in the Fig. 9 and Fig. 10, the protruding portion 530 is provided within the range of angle θ1 + angle θ2. The angle θ1 is an angle formed by the protruding direction of the protruding portion 530 protruding from the rotation center 600 and the direction toward the opening end portion 620 from the rotation center 600 in the rest position. The angle θ2 is an angle formed by the protruding direction and the direction toward the opening end portion 610 from the rotation center 600 at the end position. [Configuration of the shaft section 520 and the bearing section 220]

[0043] A detailed configuration of the shaft portion 520 and the bearing portion 220 will be described with reference to the Fig. 11 to 13 described. Fig. 11 is a perspective view showing a shaft portion of the rotating mechanism according to an embodiment of the present disclosure. As shown in Fig. As shown in Figure 11, the protruding portion 530 extends in the scale direction similarly to the shaft portion 520. It can be said that the protruding portion 530 is provided in common with a plurality of rotary mechanisms 900 because the hammer assemblies 200 are arranged adjacent to each other in the scale direction. In other words, the shaft portion 520 and the protruding portion 530 included in the adjacent rotary mechanisms 900 are connected to each other. According to the above configuration, the protruding portion 530 functions as a reinforcing member for the shaft portion 520. Furthermore, by providing the stopper contact portion 531 in a direction intersecting the direction in which the protruding portion 530 protrudes at the tip of the protruding portion 530, the stopper contact portion 531 functions as a reinforcing member for the protruding portion 530.As described above, by providing the protruding portion 530 and the stopper contact portion 531 in the shaft portion 520, the mechanical strength of the shaft portion 520 is improved.

[0044] Fig. 12 is a plan view showing the hammer assembly and the shaft portion according to an embodiment of the present disclosure. As described above, the shaft portion 520 and the protruding portion 530 extend in the scale direction. The shaft portion 520 and the protruding portion 530 are connected to a plurality of wall elements 590 (reinforcing element). The plurality of wall elements 590 are arranged in a scale direction. The wall element 590 extends in a direction that intersects the direction in which the shaft portion 520 extends. In the embodiment of Fig. 12, the wall member 590 is a plate-shaped member and has a surface that intersects the direction (i.e., the scale direction) in which the shaft portion 520 extends. Specifically, the wall member 590 has a plane perpendicular to the direction in which the shaft portion 520 extends. The hammer assembly 200 is provided between the adjacent wall members 590. The hammer assembly 200 is attached to the shaft portion 520. The above-described wall member 590 functions as a reinforcing member for the shaft portion 520. As described above, by joining the shaft portion 520 to the wall member 590, the mechanical strength of the shaft portion 520 is improved.

[0045] Fig. 13 is a cross-sectional view showing the hammer assembly and the shaft portion according to an embodiment of the present disclosure. In particular, the Fig. 13 is a cross-sectional view along the A-A' line of Fig. 12. As in Fig. As shown in Figure 13, the shaft portion 520 and the wall member 590 are integrally formed. The shaft portion 520 is a columnar member extending in the scale direction, and the wall member 590 is a plate-shaped member extending in the vertical direction. The bearing portion 220 encloses the shaft portion 520 from the vertical direction. The body portion 260 is shown further above the bearing portion 220, at the top of the shaft portion 520.

[0046] A first rib 591, a first curved portion 593, a second rib 595, and a second curved portion 597 are provided between the shaft portion 520 and the wall member 590. The first rib 591 connects the shaft portion 520 and the wall member 590 below the shaft portion 520. The first rib 591 has an inclined surface 592 that slopes from the wall member 590 to the shaft portion 520. The first curved portion 593 is provided to connect the first rib 591 and the shaft portion 520. The first curved portion 593 is provided to form a concave portion in the shaft portion 520. The second rib 595 connects the shaft portion 520 and the wall member 590 above the shaft portion 520. The second rib 595 has an inclined surface 596 that is inclined from the wall member 590 to the shaft portion 520.The second curved portion 597 is curved above the shaft portion 520 to round the corner formed by the second rib 595 and the shaft portion 520. In other words, the second curved portion 597 is provided to protrude upward from the shaft portion 520.

[0047] As in Fig. As shown in Figure 13, a distance W2 between the first ribs 591 facing each other is substantially equal to a width W1 of the support portion 220 in the scale direction. On the other hand, a distance W3 between the second ribs 595 facing each other is greater than the width W1. That is, the movement of the hammer assembly 200 in the scale direction is restricted by the first rib 591. In other words, one of the ribs provided above and below the shaft portion 520 restricts the movement of the hammer assembly 200 in the scale direction.

[0048] By providing the first curved portion 593 between the first rib 591 and the shaft portion 520, the internal stress generated between them is relaxed. By providing the second curved portion 597 between the second rib 595 and the shaft portion 520, the internal stress generated between them is relaxed. The first curved portion 593 is provided to form a concave portion to the shaft portion 520, wherein the relaxation of the above and the restriction of the movement of the hammer assembly 200 in the scale direction are compatible with each other. By providing the second curved portion 597 to protrude above the shaft portion 520, the durability of the shaft portion 520 against the external force received from above the shaft portion 520 is improved.In the present embodiment, the shaft portion 520 is subjected to an external force by which the bearing portion 220 pushes the shaft portion 520 from above by pressing the button. Since it is necessary to increase durability against the external force from above the shaft portion 520 as described above, the second rib 595 and the second curved portion 597 are provided above the shaft portion 520.

[0049] In the present embodiment, a configuration in which the shaft portion 520 and the wall member 590 are integrally formed is exemplified, but the present invention is not limited to this configuration. For example, the shaft portion 520 and the wall member 590 may be formed separately, and the wall member 590 may be attached to the shaft portion 520. The movement of the hammer assembly 200 in the scale direction may be restricted by the second rib 595 instead of the first rib 591. The positions of the first rib 591 and the first curved portion 593 and the positions of the second rib 595 and the second curved portion 597 may be reversed. That is, the movement of the hammer assembly 200 in the scale direction may be restricted above the shaft portion 520. <Zweite Ausführungsform>

[0050] In the second embodiment, a rotation mechanism 900A having a configuration different from that of the rotation mechanism 900 according to the first embodiment will be described. Fig. Fig. 14 is a side view showing the shaft portion and the protruding portion of the rotating mechanism in one embodiment of the present disclosure. In the rotating mechanism 900A of the second embodiment, the shape of a protruding portion 530A differs from the shape of the protruding portion 530 of the first embodiment. The protruding portion 530A shown in Fig. 14, the protruding portion 530 of Fig. 4 and Fig. 5, but the shape of a stopper contact portion 531A is different from the shape of the stopper contact portion 531. In the following description, the description of the same features as that of the protruding portion 530 of the Fig. 4 and Fig. 5 is omitted, and the description is made mainly at points different from those of the protruding section 530.

[0051] As in Fig. As shown in Figure 14, the stopper contact portion 531A is a part of a circular arc L3. The center of the circle L3 is the rotation center 601A. A distance from the rotation center 601A to the stopper contact portion 531A exceeds a distance from the rotation center 600A to the stopper contact portion 531A. The radius r3 of the circle L3 is larger than the radius r2 of the circle L2. The circle L2 is a circumscribed circle circumscribing the protruding portion 530A, and the circumscribed circle is a circle with the rotation center 600A as the rotation center.

[0052] The effect obtained by the configuration of the rotation mechanism 900A according to the present embodiment will be described with reference to the Fig. 15 to 20 described. Fig. 15 to 20 are diagrams showing states in which the rotary member intends to detach from the shaft portion in an embodiment of the present disclosure. Fig. 15, Fig. 17 and Fig. 19 shows the entire rotating mechanism. Fig. 16, Fig. 18 and Fig. 20 show a direction in which the stopper contact portion acts on the stopper. Fig. 15 and Fig. 16 show the rotating mechanism 900 according to the first embodiment. Fig. 17 and Fig. 18 shows the rotating mechanism 900A according to the second embodiment. Fig. 19 and Fig. 20 show a rotary mechanism 900B according to a modification of the second embodiment. The rotary mechanisms 900, 900A, and 900B have different shapes of the stopper contact portions. The shape of the stopper contact portion 531 of the Fig. 15 and Fig. 16 and the shape of the stopper contact portion 531A of the Fig. 17 and Fig. 18 are as described above. In Fig. 15 to 20, the stoppers 240, 240A, 240B extend toward the rotation centers 600, 600A, 600B in a case where the bearing portions 220, 220A, 220B are normally held in the shaft portions 520, 520A, 520B.

[0053] As in Fig. 15 and Fig. As shown in Fig. 16, in a state where the stopper 240 contacts the stopper contact portion 531, the stopper 240 is influenced by the action in a direction 243 in which the stopper 240 extends from the stopper contact portion 531. That is, when the stopper 240 is pressed by the stopper contact portion 531, the stopper 240 is hardly influenced in the direction in which the stopper 240 is moved up and down.

[0054] As in Fig. 17 and Fig. As shown in Fig. 18, in a state where the stopper 240A contacts the stopper contact portion 531A, the stopper 240A receives an action from the stopper contact portion 531A. The direction of the action received by the stopper 240A is a direction inclined at an angle θ3 downward from a direction 243A in which the stopper 240A extends. When the stopper 240A contacts the stopper contact portion 531A, the stopper 240A intends to move downward by the force of the stopper contact portion 531A pressing the stopper 240A. That is, when the stopper contact portion 531A contacts the stopper 240A in a case where the bearing portion 220A intends to detach from the shaft portion 520A, the stopper contact portion 531A influences the stopper 240A to move the position of the stopper 240A in a direction toward the center of the stopper contact portion 531A.That is, in the rotating mechanism 900A, which is in the . Fig. 17 and Fig. 18, the stopper 240A is less likely to detach from the area of ​​the stopper contact portion 531A, compared to the Fig. 15 and Fig. 16 shown rotating mechanism 900.

[0055] As in Fig. As shown in Figure 19, a stopper contact portion 531B is a part of a circular arc L4. The center of the circle L4 is the rotation center 603B. A distance from the rotation center 603B to the stopper contact portion 531B is less than a distance from the rotation center 600B to the stopper contact portion 531B. The radius r4 of the circle L4 is smaller than the radius r2 of the circle L2. The circle L2 is a circumscribed circle circumscribing the protruding portion 530B, and the circumscribed circle is a circle with the rotation center 600B as the rotation center.

[0056] As in Fig. As shown in Fig. 20, in a state where the stopper 240B contacts the stopper contact portion 531B, the stopper 240B receives an action from the stopper contact portion 531B. The direction of the action received by the stopper 240B is a direction inclined at an angle θ4 upward from a direction 243B in which the stopper 240B extends. When the stopper 240B contacts the stopper contact portion 531B, the stopper 240B intends to move upward by the force of the stopper contact portion 531B pressing the stopper 240B. That is, when the stopper contact portion 531B contacts the stopper 240B in a case where the bearing portion 220B intends to detach from the shaft portion 520B, the stopper contact portion 531B influences the stopper 240B to move the position of the stopper 240B in a direction away from the stopper contact portion 531B. That is, in the rotating mechanism 900B shown in FIG. Fig. 19 and Fig. 20, the bearing portion 220B is detached from the shaft portion 520B when a strong external force is applied, so that the load applied to the stopper 240B is smaller than that applied to the Fig. 15 and Fig. 16 shown rotating mechanism 900 applied load.

[0057] As described above, in the state where the stoppers 240, 240A, and 240B contact the stopper contact portions 531, 531A, and 531B, the direction in which the stopper contact portion presses the stopper can be adjusted by the normal direction at these contact points. As a result, the following effects are obtained. When the normal direction at the contact point between the stopper 240A and the stopper contact portion 531A is inclined in the direction of the angle θ3 ( Fig. 18), since the stopper 240A is moved in the direction of the arrow in the figure (downward), and therefore the stopper 240A hardly detaches from the contact area of ​​the stopper contact portion 531A. When the normal direction at the contact point between the stopper 240B and the stopper contact portion 531B is inclined in the direction of the angle θ4 ( Fig. 20), since the stopper 240B is moved in the direction of the arrow in the drawing (upward), the stopper 240B is less likely to break. When the normal direction at the contact point between the stopper 240 and the stopper contact portion 531 is the direction 243 in which the stopper 240 extends (in a case where the above angle θ3 = θ4 = 0°), the stopper 240 does not move in the vertical direction. Therefore, the force with which the stopper 240 supports the stopper contact portion 531 is the largest among the configurations of the Fig. 16, Fig. 18 and Fig. 20. As described above, the shape of the stopper contact portion can be appropriately selected in consideration of the detachment prevention function, the load on the stopper, or the like. <Dritte Ausführungsform>

[0058] In the third embodiment, a rotation mechanism 900C having a configuration different from that of the rotation mechanism 900 in the first embodiment will be described. Fig. Fig. 21 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure. In the rotating mechanism 900C of the third embodiment, the shape of a bearing portion 220C differs from the shape of the bearing portion 220 of the first embodiment (referring to Figs. Fig. 4 and Fig. 5). In the following description, the same features as the bearing section 220 of the Fig. 4 and Fig. 5 is omitted, mainly differences to storage section 220 are described.

[0059] As in Fig. 21, protruding portions 640C, 650C, and 660C are provided on the inner surface of the opening 229C. Each of the protruding portions 640C, 650C, and 660C protrudes from the inner surface of the opening 229C toward the shaft portion 520C and contacts the shaft portion 520C. The protrusion 640C is provided near the opening end portion 610C. The protrusion 650C is provided near an opening end portion 620C. While these protruding portions slide relative to the shaft portion 520C, the bearing 220C rotates around the shaft portion 520C. The protruding portions 640C, 650C, and 660C extend in the direction in which the shaft portion 520C extends. Fig. 21, the rotation center 600C is located on a triangle formed by the contact points of the protruding portions 640C, 650C, 660C, and the shaft portion 520C. In other words, the angle formed by the straight lines extending from the rotation center 600C to the three contact points is 180 degrees or less.

[0060] As described above, according to the rotating mechanism 900C, in addition to the same effects as the first embodiment and the second embodiment, the frictional resistance is small when the bearing portion 220C is rotated because an area in contact with the shaft portion 520C is small.

[0061] The protruding portion described in the above embodiment may be formed integrally with the bearing portion 220C, or may be formed separately from the bearing portion 220C and fixed to the bearing portion 220C. In the present embodiment, a configuration in which the protruding portion is provided on the inner surface of the opening 229C is exemplified, but the present invention is not limited to this configuration. For example, instead of the above-mentioned protruding portions 640C, 650C, and 660C, protruding portions may be provided on the outer surface of the shaft portion 520C, protruding from the shaft portion 520C toward the bearing portion 220C.

[0062] In the present embodiment, a configuration is exemplified in which the bearing portion 220C is supported by the shaft portion 520C through the three projections, but the present invention is not limited to this configuration. For example, as shown in Fig. 22, protruding portions 640D and 650D may be provided only at opening end portions 610D and 620D, respectively. In other words, the shaft portion 520D may be in point contact with the protrusions 640D and 650D near the opening end portions 610D and 620D, and the shaft portion 520D may be in surface contact with the inner surface of the opening 229D in a contact area 670D. ​​As described above, the protruding portions 640D and 650D may be formed integrally with the bearing portion 220D or may be formed separately. <Vierte Ausführungsform>

[0063] In the fourth embodiment, a rotation mechanism 900E having a configuration different from that of the rotation mechanism 900 in the first embodiment will be described. Fig. 23 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure. In the rotating mechanism 900E of the fourth embodiment, the shape of a stopper 240E differs from the shape of the stopper 240 of the first embodiment (referring to FIG. Fig. 4 and Fig. 5). In the following description, descriptions of the same features as those of the stop 240 in the Fig. 4 and Fig. 5 is omitted and points different from those of attack 240 are mainly described.

[0064] As in Fig. As shown in Figure 23, a tip portion of the stopper 240E is in a bifurcated shape. The stopper 240E has a first tip portion 245E and a second tip portion 247E. Each of the first tip portion 245E and the second tip portion 247E extends in the scale direction. However, the widths of the scale direction of the first tip portion 245E and the second tip portion 247E are smaller than the distance between the adjacent wall element 590 shown in Figure 23. Fig. 12. A concave portion 249E is provided between the first tip portion 245E and the second tip portion 247E. The shape of the concave portion 249E is a part of the circular arc L4. The radius of curvature r4 of the circle L4 is smaller than the radius of curvature r2 of the circle L2.

[0065] As described above, according to the rotation mechanism 900E of the present embodiment, in addition to the same effects as those in the first embodiment and the second embodiment, it can be made difficult for the stopper 240E to slide on the stopper contact portion 531E when the stopper contact portion 531E contacts the stopper 240E.

[0066] In the state where the bearing portion integral with the stopper 240E is to be detached from the shaft portion 520E, the first tip portion 245E and the second tip portion 247E may contact the stopper contact portion 531E, and the shape of the concave portion 249E is not necessarily part of the arc. When the stopper 240E is to be detached as described above, the number of tip portions of the stopper 240E that contact the stopper contact portion 531E may be three or more. <Fünfte Ausführungsform>

[0067] In the fifth embodiment, a rotation mechanism 900F having a configuration different from that of the rotation mechanism 900 in the first embodiment will be described. Fig. Fig. 24 is a cross-sectional view showing the hammer assembly and the shaft portion according to an embodiment of the present disclosure. In the rotation mechanism 900F of the fifth embodiment, the structure between a bearing portion 220F and a wall member 590F differs from that of the first embodiment (see Fig. 13). The following descriptions provide descriptions of the same features as when configuring Fig. 13 omitted and mainly points that differ from those of Fig. 13 are described.

[0068] As in Fig. As shown in Fig. 24, a first rib 591F, a first curved portion 594F, a second rib 595F, and a second curved portion 597F are provided between the shaft portion 520F and the wall member 590F. The first curved portion 594F is curved below the shaft portion 520F to round the corner formed by the first rib 591F and the shaft portion 520F. In other words, the first curved portion 594F is provided to protrude downward from the shaft portion 520F. A notch portion 221F is provided in the bearing portion 220F, corresponding to the first curved portion 594F. The notch portion 221F is provided to connect a side 223F in contact with the shaft portion 520F and a side 225F in contact with the first rib 591F. In Fig. 24, the notch portion 221F has a straight shape, but the notch portion 221F may have a curved shape similar to the first curved portion 594F.

[0069] As described above, according to the rotation mechanism 900F of the present embodiment, the same effect as that of the first embodiment can be obtained. <Sechste Ausführungsform>

[0070] In the sixth embodiment, a rotation mechanism 900G having a configuration different from that of the rotation mechanism 900 in the first embodiment will be described. Fig. Fig. 25 is an enlarged partial view of the rotating mechanism according to an embodiment of the present disclosure. In the rotating mechanism 900G of the sixth embodiment, the shape of the shaft portion 520G differs from the shape of the shaft portion 520 of the first embodiment (referring to Fig. Fig. 4 and Fig. 5). In the following description, the description of the same features as in the Fig. 4 and Fig. 5 is omitted, and the difference from the shaft section 520 is mainly described.

[0071] As in Fig. As shown in Figure 25, the shaft portion 520G has an elliptical shape. The shaft portion 520G slides relative to a bearing portion 220G at two sliding portions 681G and 683G. The sliding portions 681G and 683G correspond to both ends of the longitudinal axis of the elliptical shape of the shaft portion 520G. That is, the straight line connecting the sliding portions 681G and 683G is a line passing through the rotation center 600G, and the rotation center 600G is positioned at the center of the sliding portions 681G and 683G. The distance between the sliding portions 681G and 683G is greater than the distance between the opening end portions 610G and 620G. That is, the bearing portion 220G is supported at two points by the shaft portion 520G.The bearing portion 220G is detached from the shaft portion 520G when the bearing portion 220G rotates counterclockwise and the opening end portion 610G exceeds the sliding portion 683G, or when the bearing portion 220G rotates clockwise and the opening end portion 620G exceeds the sliding portion 681G. In the present embodiment, the configuration in which the shaft portion 520G has an elliptical shape is exemplified, but the present invention is not limited to this configuration. For example, a straight line connecting the sliding portions 681G and 683G may pass through the rotation center 600G, and the shaft portion 520G may have a shape other than an elliptical shape.

[0072] As described above, according to the rotation mechanism 900G of the present embodiment, in addition to the same effects as the first embodiment, the area where the bearing portion 220G contacts the shaft portion 520G is small, so that the frictional resistance when the bearing portion 220G rotates is small. <Siebte Ausführungsform>

[0073] In the seventh embodiment, a rotation mechanism 900H having a configuration different from that of the rotation mechanism 900 in the first embodiment will be described. Fig. 26 is an enlarged partial view of the rotating mechanism according to an embodiment of the present disclosure. In the rotating mechanism 900H of the seventh embodiment, the shape of a protruding portion 530H differs from the shape of the protruding portion 530 of the first embodiment (referring to Fig. 4 and Fig. 5). In the following description, the description of the same features as in the Fig. 4 and Fig. 5 is omitted, and the difference from the protruding portion 530 is mainly described.

[0074] As in Fig. As shown in Fig. 26, the protruding portion 530H has a shape that gradually widens from the shaft portion 520H to the stopper contact portion 531H. In other words, the protruding portion 530H is substantially fan-shaped. In the first to sixth embodiments, the configuration in which the protruding portion 530 is substantially T-shaped was exemplified, but the present invention is not limited to this configuration, and various shapes are applied as in the seventh embodiment. <Achte Ausführungsform>

[0075] In the eighth embodiment, a rotation mechanism 900J having a configuration different from that of the rotation mechanism 900 in the first embodiment will be described. Fig. Fig. 27 is an enlarged partial view of the rotating mechanism according to an embodiment of the present disclosure. In the rotating mechanism 900J of the eighth embodiment, the shape of the stopper contact portion 531J differs from the shape of the stopper contact portion 531 shown in Fig. 4. In particular, the shape of the stopper contact portion 531J is not a part of a circular arc, but a flat surface. The shape of the stopper contact portion 531J according to the present embodiment corresponds to the case where the radius r3 of the circle L3 in the Fig. 14 is infinite. Therefore, according to the rotation mechanism 900J of the present embodiment, the same effects as those of the first embodiment and the second embodiment can be obtained.

[0076] In the present embodiment, an example is shown in which the shape of the stopper contact portion 531J is formed by a plane, but the present invention is not limited to this configuration. For example, the stopper contact portion 531J may be configured by multiple planes, may be configured by a combination of a plane and a curved surface (e.g., an arcuate curved surface like the stopper contact portion 531 of the first embodiment), or may be configured by a combination of curved surfaces with different radii of curvature. <Neunte Ausführungsform>

[0077] In the ninth embodiment, a rotation mechanism 900K having a configuration different from that of the rotation mechanism 900 in the first embodiment will be described. Fig. 28 is an enlarged partial view of the rotating mechanism according to an embodiment of the present disclosure. Fig. 29 is a plan view showing a hammer assembly and a shaft portion according to an embodiment of the present disclosure.

[0078] As in Fig. 28 and Fig. 29, the stopper contact portion 531K is separated from the shaft portion 520K. That is, in the side view of Fig. 28 is an element that corresponds to Fig. 4, and the stopper contact portion 531K and the shaft portion 520K are independent of each other. However, as shown in Fig. 29, the stopper contact portion 531K and the shaft portion 520K are connected via the wall member 590K. In other words, the stopper contact point 531K and the shaft portion 520K are connected to the wall member 590K at the outer sides of both ends of a hammer assembly 200K in the scale direction. The stopper contact portion 531K and the shaft portion 520K may or may not be fixed to the wall member 590K. For example, the shaft portion 520K may be rotatably attached to the wall member 590K. The stopper contact portion 531K may be slidably attached to the wall member 590K.

[0079] As described above, according to the rotation mechanism 900K of the present embodiment, since the stopper contact portion 531K and the shaft portion 520K are connected via the wall member 590K, the external force applied to the shaft portion 520K is distributed to the stopper contact portion 531K, so that the mechanical strength of the shaft portion 520K is improved. <Zehnte Ausführungsform>

[0080] In the tenth embodiment, a rotation mechanism 900L having a configuration different from that of the rotation mechanism 900 in the first embodiment will be described. Fig. Fig. 30 is an enlarged partial view of a rotating mechanism according to an embodiment of the present disclosure. In the rotating mechanism 900L of the tenth embodiment, the shape of the portion in which the shaft portion 520L and the bearing portion 220L slide differs from the shape of the Fig. 4 shown rotating mechanism 900.

[0081] As in Fig. As shown in Figure 30, the shaft portion 520L includes a first sliding portion 523L, a second sliding portion 525L, and a third sliding portion 527L. These three sliding portions protrude from the shaft portion 520L toward the inner wall of the bearing portion 220L and contact the inner wall. The lengths from the rotation center 600L to the tips of the first sliding portion 523L, the second sliding portion 525L, and the third sliding portion 527L (hereinafter referred to simply as the length of each sliding portion) are different. Specifically, the length of the second sliding portion 525L is longer than the length of the first sliding portion 523L. The length of the third sliding portion 527L is longer than the length of the second sliding portion 525L. The inner wall of the bearing portion 220L has an arc shape of a circle. The center of the circle is the rotation center 600L, which corresponds to the length of each sliding portion.

[0082] The length from the rotation center 600L to the tip (stop contact portion 531L) of the protruding portion 530L (hereinafter referred to simply as the length of the protruding portion 530L) is r5. The shape of the stop contact portion 531L is a part of a circular arc L5 with a radius r5. The center of the circle L5 is the rotation center 600L. As shown in Fig.30, the length of the protruding portion 530L is greater than the length of the first sliding portion 523L. On the other hand, the length of the protruding portion 530L is less than the lengths of the second sliding portion 525L and the third sliding portion 527L. In other words, in the above configuration, the protruding portion 530L protrudes further than the sliding portion (the first sliding portion 523L) with respect to the rotation center 600L. The sliding portion (the first sliding portion 523L) is closest to the rotation center 600L among the sliding portions (the first sliding portion 523L, the second sliding portion 525L, and the third sliding portion 527L) with the shaft portion 520L and the bearing portion 220L sliding against each other. In other words, a part of the sliding portion in which the shaft portion 520L and the bearing portion 220L slide is located within the circle L5 that contacts the tip of the protruding portion 530L.The center of the circle L5 is the center of rotation 600L.

[0083] As described above, according to the rotation mechanism 900L of the present embodiment, the same effect as that of the first embodiment can be obtained.

[0084] In the above-described embodiments, an electronic piano was shown as an example of the keyboard device to which the hammer assembly was applied. On the other hand, the hammer assembly of the above embodiments can be applied to a rotating mechanism of an acoustic piano such as a grand piano or an upright piano. For example, in the piano, a rotating mechanism of the above-described embodiments can be applied to a rotating mechanism including a rotating member and a support unit that rotatably supports the rotating member. In this case, the sound generating mechanism corresponds to the hammer and the string. The rotating mechanism of the above embodiments can be applied to a rotating member other than a piano.

[0085] The present disclosure is not limited to the embodiments described above and can be appropriately modified within a range that does not deviate from the spirit. LIST OF REFERENCE SYMBOLS 1 keyboard device 10 Keyboard layout 70 sound source device 80 speakers 90 housings 100 keys 120 Hammer support unit 151 front key guide 153 Side surface key guide 180 connecting section 181 plate-shaped flexible element 183 key-side support section 185 rotating element 200 hammer arrangement 210 front section 220 storage section 221F notch section 223F, 225F Page 229 Opening 230 weight section 240 stops 241 peak section 243 direction 245E first peak section 247E second peak section 249E concave section 250 connecting section 260 body section 300 sensors 410 lower stop 430 upper stop 500 frames 511 front frame guide 513 Side surface frame guide 520 wave section 522 concave section 523L first gliding section 525L second sliding section 527L third gliding section 530 protruding section 531 Stop contact section (stop contacting section) 585 frame-side support section 590 wall element 591 first rib 592 inclined surface 593, 594F first curved section 595 second rib 596 inclined surface 597 second curved section 600 center of rotation 601A, 603B center of rotation 610, 620 opening end section 615 line segment 630 touch points 640C, 650C, 660C protruding section 670D touch area 681G, 683G sliding section 710 signal converter 730 sound source unit 750 output unit 900 rotating mechanism

Claims

[1] Rotating mechanism, comprising: a shaft section (520); a bearing portion (220) configured to rotate with respect to a predetermined axis as a rotation center (600) and configured to slide relative to an outer periphery of the shaft portion (520); a protruding portion (530) protruding from the shaft portion (520); and a stop (240) formed integrally with the bearing portion (220), wherein the stop (240) faces the protruding portion (530) and the protruding portion (530) extends from the shaft portion (520) toward the stop (240), wherein a length of the protruding portion (530) in the direction in which the protruding portion (530) protrudes is greater than a distance from the rotation center (600) to a sliding portion in which the bearing portion (220) slides relative to the outer periphery of the shaft portion (520). [2] A rotating mechanism according to claim 1, wherein the bearing section (220) has an opening (229) and the protruding portion (530) protrudes from the opening (229). [3] Rotating mechanism, comprising: a shaft section (520); a bearing portion (220) configured to rotate with respect to a predetermined axis as a rotation center (600) and configured to slide relative to an outer periphery of the shaft portion (520); a protruding portion (530) protruding from the shaft portion (520); and a stop (240) formed integrally with the bearing portion (220), the stop (240) facing the protruding portion (530), wherein a length of the protruding portion (530) in a direction in which the protruding portion (530) protrudes is greater than a distance from the rotation center (600) to a sliding portion in which the bearing portion (220) slides relative to the outer circumference of the shaft portion (240), and wherein a distance from the rotation center (600) to the stopper (240) exceeds a distance from a line connecting both opening ends of the bearing contacting the shaft portion (240) to the stopper (240) in a case where the bearing tends to detach from the shaft portion (520) and the protruding portion (530) contacts the stopper (240). [4] The rotating mechanism according to claim 1, wherein the protruding portion (530) exists on a line connecting a tip portion (241) of the stopper (240) and the rotation center (600) in a rotation range of the bearing. [5] A rotating mechanism according to claim 1, wherein the protruding portion (530) has a stop-contacting portion (531) and the stopper-contacting portion (531) is configured to contact the stopper (240) in a case where the bearing tends to detach from the shaft portion (520). [6] A rotating mechanism according to claim 5, wherein a shape of the stopper-contacting portion (531) has a part of a circular arc, and a center of the circle coincides with the center of rotation (600). [7] Rotating mechanism, comprising: a shaft section (520); a bearing portion (220) configured to rotate with respect to a predetermined axis as a rotation center (600) and configured to slide relative to an outer periphery of the shaft portion (520); a protruding portion (530) protruding from the shaft portion (520); and a stop (240) formed integrally with the bearing portion (220), the stop (240) facing the protruding portion (530), wherein a length of the protruding portion (530) in a direction in which the protruding portion (530) protrudes is greater than a distance from the rotation center (600) to a sliding portion in which the bearing portion (220) slides relative to the outer circumference of the shaft portion, the protruding portion (530) has a stop-contacting portion (531), the stopper-contacting portion (531) is configured to contact the stopper (240) in a case where the bearing tends to detach from the shaft portion (520), a shape of the stopper-contacting portion (531) has a part of a circular arc, and a distance from a center of the circle to the stop-contacting section (531) exceeds a distance from the rotation center (600) to the stop-contacting section (531). [8] Rotating mechanism, comprising: a shaft section (520); a bearing portion (220) configured to rotate with respect to a predetermined axis as a rotation center (600) and configured to slide relative to an outer periphery of the shaft portion (520); a protruding portion (530) protruding from the shaft portion (520); and a stop (240) formed integrally with the bearing portion (220), the stop (240) facing the protruding portion (530), wherein a length of the protruding portion (530) in a direction in which the protruding portion (530) protrudes is greater than a distance from the rotation center (600) to a sliding portion in which the bearing portion (220) slides relative to the outer circumference of the shaft portion (520), the protruding portion (530) has a stop-contacting portion (531) and the stopper-contacting portion (531) is configured to contact the stopper (240) in a case where the bearing tends to detach from the shaft portion (520), a shape of the stop-contacting portion (531) has a part of a circular arc and a distance from a center of the circle to the stop-contacting section (531) is less than a distance from the rotation center (600) to the stop-contacting section (531). [9] The rotary mechanism according to claim 5, wherein a shape of the stopper contacting portion (531) is a flat surface. [10] The rotary mechanism according to claim 1, further comprising a reinforcing member (590) extending in a direction intersecting a direction in which the shaft portion (520) extends, wherein the shaft portion (520) and the protruding portion (530) are connected to the reinforcing member (590). [11] A rotary mechanism according to claim 2, wherein a distance from the rotation center (600) to the stopper (240) exceeds a distance from a line connecting both opening ends of the bearing contacting the shaft portion (520) to the stopper (240) in a case where the bearing tends to come off from the shaft portion (520) and the protruding portion (530) contacts the stopper. [12] A rotating mechanism according to claim 11, wherein the protruding portion (530) exists on a line connecting a tip portion (241) of the stopper (240) and the rotation center (600) in a rotation range of the bearing. [13] The rotary mechanism according to claim 12, wherein the protruding portion (530) has a stopper-contacting portion (531), and the stopper-contacting portion (531) is configured to contact the stopper (240) in a case where the bearing tends to detach from the shaft portion (520). [14] A rotating mechanism according to claim 13, wherein a shape of the stop-contacting portion (531) includes a part of a circular arc and a center of the circle coincides with the center of rotation (600). [15] A rotating mechanism according to claim 13, wherein a shape of the stop-contacting portion (531) has a part of a circular arc and a distance from a center of the circle (600) to the stop-contacting section (531) exceeds a distance from the rotation center (600) to the stop-contacting section (531). [16] A rotating mechanism according to claim 13, wherein a shape of the stop-contacting portion (531) has a part of a circular arc and a distance from a center of the circle to the stop-contacting section (531) is less than a distance from the rotation center (600) to the stop-contacting section (531). [17] The rotary mechanism according to claim 13, wherein a shape of the stopper contacting portion (531) is a flat surface. [18] Rotating mechanism, comprising: a shaft section (520); a bearing portion (220) configured to rotate with respect to a predetermined axis as a rotation center (600) and configured to slide relative to an outer periphery of the shaft portion (520); a stopper (240) formed integrally with the bearing portion (220); a stopper-contacting portion (531) disposed between the shaft portion (520) and the stopper (240), the stopper-contacting portion (531) being configured to contact the stopper (240) in a case where the bearing tends to detach from the shaft portion (520); and a reinforcing element (590) extending in a direction intersecting a direction in which the shaft portion (520) extends, wherein the shaft portion (520) and the stopper-contacting portion (531) are connected to the reinforcing member (590) outside both opening ends of the bearing portion (220). [19] Keyboard device, comprising: one key (100); a hammer assembly (200) rotated by the rotating mechanism according to claim 1 in response to a key press; a sensor (300) configured to detect an actuation of the button; and a sound source unit (70) configured to generate an acoustic waveform signal in response to an output signal from the sensor.

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