JP2013015627A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard device capable of automatically playing a plurality of keys with a simple configuration and automatically operating.
SOLUTION: A plurality of keys 5 provided in a state of being arranged in parallel on the lower case 3 so as to be rotatable in the vertical direction, and in a state along the arrangement direction of the keys 5 below the plurality of keys 5 A rotary drum 20 that is rotatably arranged in the vertical direction and has a plurality of protrusions 23 provided on the outer peripheral surface corresponding to each key 5, and a rotary drum 20 that is provided on the plurality of keys 5 and that rotates the rotary drum 20. Accordingly, a plurality of projections 23 come and go, and a key operation unit 24 for rotating each key 5 in the vertical direction is provided. Accordingly, when the rotary drum rotates and the plurality of projections 23 come in contact with and separate from the key operation units 24, each key 5 can be rotated in the vertical direction. It can be operated.
[Selection] Figure 3

Description

  The present invention relates to a keyboard apparatus such as an electronic piano or an electronic organ, and more particularly to a keyboard apparatus having an automatic performance function based on a music box system.

  For example, in a keyboard instrument type toy equipped with a keyboard part, as described in Patent Document 1, a music box is driven by a spring to play a musical tone, and a rotating body is rotated by the spring of the music box to rotate a doll. What is comprised so that operation bodies, such as, may be operated is known.

JP 2006-149980 A

  However, with a keyboard instrument type toy equipped with such a keyboard part, even if you can enjoy a moving object such as a doll according to the music played by the music box, you can enjoy it depending on the music played by the music box. Since each key of the keyboard part cannot be operated, there is a disadvantage that it cannot be fully enjoyed as a keyboard instrument.

  The problem to be solved by the present invention is to provide a keyboard device capable of automatically playing a plurality of keys with a simple configuration.

  According to the present invention, a plurality of keys provided so as to be rotatable in the vertical direction in a state of being arranged in parallel with the instrument main body, and rotating in the vertical direction in a state along the arrangement direction of the keys below the plurality of keys. A rotating drum provided on the outer peripheral surface corresponding to each of the plurality of keys, and provided on each of the plurality of keys, and in accordance with a rotating operation of the rotating drum. A keyboard device comprising: a key operation unit for rotating each key in the vertical direction by contacting and separating a plurality of protrusions.

  According to the present invention, when the rotating drum is rotated, the plurality of protrusions provided on the rotating drum are brought into contact with and separated from the key operation portions provided on the plurality of keys, respectively, and the plurality of keys are respectively moved in the vertical direction. It can be rotated. For this reason, since a plurality of keys can be automatically operated in accordance with a musical tone to be generated, the configuration is simple and a plurality of keys can be automatically operated to perform an automatic performance.

It is the top view which showed Embodiment 1 which applied this invention to the electronic keyboard musical instrument. It is the expanded sectional view which abbreviate | omitted and showed in AA arrow view of the electronic keyboard musical instrument shown by FIG. FIG. 3 is an enlarged cross-sectional view showing a state in which the key operation unit of the key is pushed up by the protrusion of the rotary drum and the key switch unit is turned off in the direction of arrow B-B of the electronic keyboard instrument shown in FIG. 1. . Each key shown in FIG. 3 is shown, (a) is an enlarged sectional view showing a black key, and (b) is an enlarged sectional view showing a white key. In the electronic keyboard instrument shown in FIG. 3, the rotary drum rotates and the key operation part of the key is positioned between the protrusions of the rotary drum, the key is pulled down by the weight of the weight part, and the key switch part is turned on. It is the expanded sectional view which showed the state made to do. In the electronic keyboard instrument shown in FIG. 3, in a state where the key operation unit of the key is pushed up by the protrusion of the rotary drum, the key operation unit is elastically deformed by pressing the key, and the key switch unit is It is the expanded sectional view which showed the state made to operate | move on. It is the block diagram which showed the circuit structure of the electronic keyboard musical instrument shown by FIG. In Embodiment 2 which applied this invention to the electronic keyboard instrument, it is the expanded sectional view which showed the initial state in which the contact part of the key operation part of the key was located between the protrusion parts of the rotating drum, and the key was pushed up. . Each key shown in FIG. 8 is shown, (a) is an enlarged sectional view showing a black key, and (b) is an enlarged sectional view showing a white key. FIG. 9 is an enlarged cross-sectional view showing a state where the rotary drum rotates and the key operation unit of the key is pushed down by the protrusion of the rotary drum and the key switch unit is turned on in the electronic keyboard instrument shown in FIG. 8. In the electronic keyboard instrument shown in FIG. 8, in the initial state where the abutment portion of the key operation portion of the key is inserted between the protrusions of the rotary drum and the key is pushed up, the key is depressed and the key of the key is operated. FIG. 5 is an enlarged cross-sectional view illustrating a state where a contact portion of the operation portion is detached downward from between the protrusions of the rotary drum and the key switch portion is turned on.

(Embodiment 1)
A first embodiment in which the present invention is applied to an electronic keyboard instrument will be described below with reference to FIGS.
As shown in FIG. 1, the electronic keyboard instrument includes a musical instrument body 1. The musical instrument main body 1 is composed of an upper case 2 and a lower case 3, and a keyboard portion 4 is provided therein. As shown in FIGS. 1 to 4, the keyboard unit 4 has a plurality of keys 5 including a white key 5 a and a black key 5 b, and the plurality of keys 5 are arranged in parallel in the vertical direction. It is comprised so that it may rotate.

  In this case, as shown in FIG. 1, the upper case 2 has a portion extending from a position located above the rear portion of the keyboard portion 4 (upper side portion in FIG. 1) to a location located further rearward of the keyboard portion 4, and It is provided on the lower case 3 at portions located on both sides of the keyboard part 4 in the arrangement direction of the keys 5. Thus, the keyboard portion 4 is configured to be exposed above the upper case 2 without being covered by the upper case 2.

  As shown in FIG. 1, the upper case 2 is provided with a speaker unit 6, a display unit 7, and an operation switch unit 8. The speaker unit 6 is for generating a sound such as a musical sound, and is provided at a position located on the upper left side of the upper surface of the upper case 2 as shown in FIG. The display unit 7 is provided at a position located on the right side of the speaker unit 6 on the upper surface of the upper case 2.

  The display unit 7 includes a flat display panel such as a liquid crystal display panel or an EL (electroluminescence) display panel, and is configured to display various information necessary for a keyboard instrument electro-optically. . The operation switch unit 8 includes various switches such as a power switch, a volume switch, and a timbre switch, and is distributed on the upper surface of the upper case 2.

  By the way, as shown in FIGS. 3 to 5, each key 5 of the keyboard portion 4 is formed with a thin bent portion 10 at each rear end portion protruding rearward (left side in FIG. 3). A connecting portion 11 is formed at the rear end of each bent portion 10 so as to be continuous in the direction in which the keys 5 are arranged (in FIG. 3, the front and back surfaces of the paper). It is comprised so that it can be attached to.

  As a result, as shown in FIGS. 3 and 5, the plurality of keys 5 are urged upward by the elastic force of each bending portion 10, and each key 5 is pressed from above in this state. In addition, each bending portion 10 is configured to rotate in the vertical direction around each bending portion 10 by bending and deforming downward.

  In this case, as shown in FIG. 3, the plurality of keys 5 are provided with a stopper portion 13 at each front end portion (right end portion in FIG. 3), and the position where the stopper portion 13 is provided at the front portion of the lower case 3. The upper limit position is regulated by abutting against the regulating part 14 from below. Each of the plurality of keys 5 is provided with a switch pressing portion 15 for pressing a key switch portion 16 to be described later.

  On the other hand, as shown in FIGS. 3 and 5, the lower case 3 is provided with the key switch unit 16 positioned below the plurality of keys 5. The key switch unit 16 includes a switch board 18 attached on a plurality of support bosses 17 provided on the lower case 3 and a rubber sheet 19 provided on the switch board 18.

  The switch board 18 is formed in a band plate shape that is continuous in the arrangement direction of the keys 5 (left and right in FIG. 1) as shown by dotted lines in FIG. 1, and each switch in the plurality of keys 5 is shown in FIG. A plurality of support bosses 17 provided on the lower case 3 are attached by screws 17a while being positioned below the pressing portion 15.

  Further, as shown in FIG. 3, the rubber sheet 19 is in the form of an elongated belt continuous in the arrangement direction of the keys 5, and the length in the front-rear direction (left-right direction in FIG. 3) is longer than the length in the front-rear direction of the switch substrate 18. Is also formed short. The rubber sheet 19 is provided on a switch substrate 18 located at a location corresponding to each switch pressing portion 15 of the plurality of keys 5. The rubber sheet 19 is provided with a dome-shaped bulging portion 19 a corresponding to each switch pressing portion 15 of the plurality of keys 5.

  In this case, as shown in FIG. 3, the dome-shaped bulging portion 19a is provided so as to face the movable contact 19b with the movable contact 19b spaced above the fixed contact 18a provided on the switch substrate 18. When pressed from above in this state, as shown in FIG. 5, it is configured to elastically deform so as to be crushed.

  Thereby, as shown in FIGS. 3 and 5, when the key switch portion 16 is elastically deformed when the dome-shaped bulging portion 19 a formed on the rubber sheet 19 is pressed by the switch pressing portion 15 of the key 5. The movable contact 19b in the bulging portion 19a comes into contact with the fixed contact 18a on the switch substrate 18 and outputs a switch signal.

  Further, as shown in FIG. 3, the dome-shaped bulging portion 19a is elastically restored to a dome shape when the key 5 is not pressed from above, and the switch pressing portion 15 of the key 5 is bent. By pushing up together with the elastic restoring force of the portion 10, the stopper portion 13 provided at the front end portion of the key 5 is brought into contact with the position restricting portion 14 of the lower case 3 from below, and the key 5 is moved to the upper limit position which is the initial position. The position is restricted.

  By the way, on the lower case 3, as shown in FIGS. 1 to 3, the rotary drum 20 can be rotated in the vertical direction with the rotary drum 20 positioned below the rear portion (left side portion in FIG. 3) of the plurality of keys 5. Is arranged. As shown in FIGS. 1 and 2, the rotary drum 20 is formed in a cylindrical shape that is continuous in the arrangement direction of the keys 5. In this case, a support shaft 20a is provided at one end portion (left end portion in FIG. 2) of the rotating drum 20, and a bearing portion 20b is provided at the other end portion (right end portion in FIG. 2) of the rotating drum 20. Is provided.

  As a result, as shown in FIG. 2, the rotating drum 20 has a support shaft 20a at one end attached to the output shaft 21a of the motor portion 21 provided on the lower case 3, and a bearing portion 20b at the other end. The tip 22a of the support member 22 provided on the lower case 3 is rotatably inserted, so that the support member 22 is rotatably arranged on the lower case 3 and rotates in the vertical direction according to the rotation of the motor unit 21. It is configured.

  As shown in FIGS. 2 and 3, a plurality of protrusions 23 are provided on the outer peripheral surface of the rotary drum 20 corresponding to the plurality of keys 5, respectively. The plurality of protrusions 23 are arranged on the outer periphery of the rotary drum 20 in a state in which the intervals between the plurality of protrusions 23 correspond to musical notes in order to move each key 5 in the vertical direction according to the score of the musical performance. Each surface is provided along the circumferential direction.

  Further, as shown in FIGS. 3 to 5, each of the plurality of keys 5 is provided with a key operation unit 24 corresponding to each protrusion 23 positioned on the upper portion of the rotary drum 20. The key operation unit 24 has a plurality of protrusions 23 that rotate upward in accordance with the rotational operation of the rotary drum 20, and the protrusions 23 that have rotated and moved upwardly of the rotary drum 20 sequentially contact and separate each other. The key 5 is configured to rotate up and down.

  That is, as shown in FIG. 3, the key operation unit 24 is positioned at the upper part of the rotary drum 20 as the rotary drum 20 rotates and the plurality of protrusions 23 rotate up and down. When the protruding portion 23 abuts from below, the key 5 is pushed up by being pushed up by the protruding portion 23 located on the upper portion.

  In addition, as shown in FIG. 5, the key operation unit 23 can be inserted between the projections 23 by releasing the push-up of the key 5 when it corresponds between the projections 23 positioned on the upper portion of the rotary drum 20. In this state, the key 5 can be pulled down. In this case, as shown in FIGS. 3 to 5, the key 5 is pulled down at the front part of the plurality of keys 5 when the key operation part 24 corresponds between the protrusions 23 positioned on the upper part of the rotary drum 20. Thus, weight portions 25 that are biasing members for turning on the key switch portion 16 are provided.

  Thereby, as shown in FIG. 3, the key switch unit 16 causes the projection 23 located at the top of the rotary drum 20 among the plurality of projections 23 to come into contact with the key operation unit 24 from below to hold the key 5. When the key 5 is pulled down by the weight of the weight portion 25 corresponding to the key operation portion 24 between the projections 23 located on the upper portion of the rotary drum 20, the operation is turned on. ing.

  Further, each key operation portion 24 of the plurality of keys 5 is made of an elastic material such as rubber, and as shown in FIG. 3, the weight 5 of the weight portion 25 is attached to the key 5 by the protrusion 23 positioned on the upper portion of the rotary drum 20. As shown in FIG. 6, when the key 5 is pushed down with a force stronger than the pushing-up force by the projection 23 located on the upper part of the rotating drum 20, the elastic material is not elastically deformed when pushed up against the elastic drum 20. It is configured to be deformed.

  That is, as shown in FIG. 6, the key operation unit 24 is operated by pressing the key 5 in a state where the projection 23 located on the upper portion of the rotary drum 20 is in contact with the lower side and the key 5 is pushed up. In this case, the key 5 can be pushed down by being elastically deformed, and the key switch portion 16 can be turned on by the switch pressing portion 15 of the key 5.

Next, the circuit configuration of the electronic keyboard instrument will be described with reference to the block diagram shown in FIG.
The circuit configuration of the electronic keyboard instrument includes a CPU (central processing unit) 30 that controls the entire circuit of the keyboard instrument, a memory unit 31 that stores a predetermined program and input data, and a volume, tone, and mode. An operation switch unit 8 having various switches such as switching, a key switch unit 16 of the keyboard unit 4 that outputs a switch signal based on a key pressing operation of a plurality of keys 5, and various types based on commands from the CPU 30. And a motor drive circuit 32 that drives the motor unit 21 based on a command from the CPU 30.

  The circuit configuration of the electronic keyboard instrument includes a sound source unit 33 that generates sound source data based on a command from the CPU 30, and a sound system 34 that generates musical sound data based on the sound source data generated by the sound source unit 33. It has. In this case, the sound system 34 gives the musical sound data generated based on the sound source data from the sound source unit 33 to the speaker unit 6, and generates a musical sound from the speaker unit 6. The CPU 30, the memory unit 31, the operation switch unit 8, the key switch unit 16, the display unit 7, the motor drive circuit 32, the sound source unit 33, and the sound system 34 are connected by a bus line 35.

Next, the operation of such an electronic keyboard instrument will be described.
When performing an automatic performance with this electronic keyboard instrument, the motor unit 21 may be driven. Then, the rotation of the motor unit 21 is transmitted to the rotary drum 20 via the output shaft 21a and the support shaft 20a of the rotary drum 20, whereby the rotary drum 20 rotates in the vertical direction. When the rotating drum 20 rotates in this way, the plurality of protrusions 23 provided on the outer peripheral surface thereof rotate and move up and down together with the rotating drum 20.

  When any one of the plurality of protrusions 23 reaches the upper part of the rotary drum 20, the protrusion 23 that reaches the upper part becomes a key operation part 24 of the key 5 as shown in FIG. 3. The key operation unit 24 is pushed up by abutting. At this time, the key operation unit 24 is pushed up with almost no elastic deformation. For this reason, the key operation part 24 pushes up the key 5 against the weight of the weight part 25.

  Thereby, as shown in FIG. 3, the key 5 rotates upward (counterclockwise in FIG. 3) around the bent portion 10, and the stopper portion 13 at the front end portion of the key 5 is positioned in the position restricting portion of the lower case 3. 14 from the lower side and is regulated to the initial position which is the upper limit position. At this time, the switch pressing portion 15 of the key 5 is positioned above the key switch portion 16, the bulging portion 19 of the key switch portion 16 is elastically restored to the dome shape, and the key switch portion 16 is turned off.

  When the rotating drum 20 further rotates in this state, as shown in FIG. 5, the key operating portion 24 of the key 5 gets over the protruding portion 23 positioned on the upper portion of the rotating drum 20 and is between the next protruding portion 23. Correspond. Then, the key 5 rotates downward (clockwise in FIG. 5) about the bent portion 10 by the weight of the weight portion 25. As a result, the key operation part 24 of the key 5 is inserted between the protrusions 23 located on the upper part of the rotary drum 20, and the switch pressing part 15 of the key 5 presses the key switch part 16 to turn it on.

  That is, when the key switch portion 16 is pressed by the switch pressing portion 15 of the key 5, the bulging portion 19 a of the rubber sheet 19 provided on the switch substrate 18 of the key switch portion 16 is moved to the weight portion 25 of the key 5. The movable contact 19b provided in the bulging portion 19a contacts the fixed contact 18a on the switch substrate 18 by being elastically deformed so as to be crushed by the weight. As a result, the key switch unit 16 is turned on to output a switch signal, and the speaker unit 6 generates a musical tone based on the switch signal from the key switch unit 16.

  Each operation of the key 5 and the key switch unit 16 is performed by each of the bulging portions 19 a of the rubber sheet 19 provided on the switch substrate 18 of the plurality of keys 5 and the key switch unit 16 arranged in the keyboard unit 4. All of them sequentially operate as the plurality of protrusions 23 provided on the rotary drum 20 rotate. Thereby, the musical sound according to the score of a performance music is generated from the speaker part 6, and an automatic performance is performed. In such an automatic performance, since a plurality of keys 5 rotate up and down in accordance with the performance music, a beginner can check the movement of the keys 5 as an image, and this makes it easier to remember the performance music. it can.

  And when stopping this automatic performance, the drive of the motor part 21 should just be stopped. At this time, out of the plurality of protrusions 23 provided on the outer peripheral surface of the rotary drum 20, any one of the protrusions 23 corresponding to the respective keys 5 is positioned on the upper part of the rotary drum 20, and Each key operation part 24 of the plurality of keys 5 is pushed up by the protrusion 23 to restrict each key 5 to the initial position.

  On the other hand, when the performer operates the electronic keyboard musical instrument, the performer only needs to press each of the plurality of keys 5. At this time, each key operation portion 24 of the plurality of keys 5 is pushed up by the respective projections 23 located on the upper portion of the rotary drum 20, and each key 5 is restricted to the initial position. A person can press the plurality of keys 5 respectively.

  That is, even if each key operation part 24 is pushed up by each projection 23 located on the upper part of the rotary drum 20 and each key 5 is restricted to the initial position, if each key 5 is pressed from above, As shown in FIG. 6, each key operation unit 24 is elastically deformed by a key pressing operation. Therefore, the key 5 is rotated downward about the bent portion 10 and pushed down, and the switch pressing portion 15 of the depressed key 5 turns on the key switch portion 16. Accordingly, the key switch unit 16 outputs a switch signal, and the speaker unit 6 generates a musical sound based on the switch signal from the key switch unit 16.

  As described above, according to the electronic keyboard instrument of the first embodiment, the plurality of keys 5 provided to be rotatable in the vertical direction in a state of being arranged in parallel on the lower case 3 of the musical instrument main body 1, and the plurality of keys. The rotary drum 20 is arranged below the key 5 so as to be rotatable in the vertical direction in a state along the arrangement direction of the keys 5, and a plurality of protrusions 23 are provided on the outer peripheral surface corresponding to the plurality of keys 5, respectively. And a key operation unit 24 for rotating each key 5 in the vertical direction by providing a plurality of projections 23 in contact with and separating from each other according to the rotation operation of the rotary drum 20. By providing, it is possible to perform automatic performance by automatically operating the plurality of keys 5 with a simple configuration.

  That is, in this electronic keyboard instrument, when the rotary drum 20 is rotated, the plurality of protrusions 23 provided on the rotary drum 20 come in contact with and separate from the key operation units 24 provided on the plurality of keys 5, respectively. Thus, each key 5 can be rotated in the vertical direction, whereby a plurality of keys 5 can be automatically operated.

  Therefore, the plurality of keys 5 can be operated in accordance with the generated musical tone, and the rotary drum 20 having the plurality of protrusions 23 can be rotated below the plurality of keys 5 having the key operation unit 24. Therefore, the structure is simple, and a plurality of keys 5 can be automatically operated to perform an automatic performance. As a result, the plurality of keys 5 rotate in the vertical direction in accordance with the musical performance, so that a beginner can confirm the movement of the key 5 as an image, and thus the musical performance can be easily remembered.

  In this case, the key operation unit 24 of the key 5 pushes up the key 5 and is positioned on the upper part of the rotary drum 20 when the projecting part 23 located on the upper part of the rotary drum 20 comes into contact among the plural projecting parts 23. When the corresponding protrusions 23 correspond to each other, the push-up of the key 5 is released to enable the key 5 to be pulled down, so that each key can be moved by the protrusion 23 positioned above the rotary drum 20. 5 key operation sections 24 can be reliably pushed up, whereby the key 5 can be pushed up reliably and the key switch section 16 can be turned off.

  Further, when the key operation unit 24 of each key 5 corresponds to the projection 23 located on the upper part of the rotary drum 20, the key operation unit 24 can reliably release the push-up of the plurality of keys 5. The key operation part 24 of each key 5 can be reliably and satisfactorily inserted between the protrusions 23 located on the upper part of the rotary drum 20, thereby enabling each key 5 to be pulled down. The key 5 enables the key switch unit 16 to be turned on.

  Further, in the electronic keyboard instrument of the first embodiment, the weight portions 25 that are urging members for urging a plurality of keys in the pulling-down direction are provided at the front portions of the respective keys 5, so that the rotary drum When the key operation part 24 of each key 5 corresponds between the protrusions 23 located at the upper part of 20, the key operation part 24 of each key 5 is surely inserted between the protrusions 23 by the weight of the weight part 25. As a result, the key 5 can be reliably pulled down and the key switch unit 16 can be turned on satisfactorily.

  In addition, the electronic keyboard instrument of the first embodiment further includes a switch unit 16 that performs a switch operation when each of the plurality of keys 5 rotates in the vertical direction. The key switch unit 16 includes a plurality of protrusions. 23, when the protrusion 23 located on the upper part of the rotary drum 20 abuts against the key operation part 24 from the lower side and pushes up the key 5, an off operation is performed, and the protrusion 23 located on the upper part of the rotary drum 20 When the key 5 is pulled down by the weight of the weight portion 25 in response to the key operation unit 24, the key 5 is turned on, so that the rotation of the key 5 accompanying the rotation of the rotary drum 20 causes the key 5 to rotate upward and downward. The key switch unit 16 can be surely switched to output a switch signal, and a musical sound can be generated from the speaker unit 6 with this switch signal.

  Furthermore, in the electronic keyboard instrument of the first embodiment, the key operation unit 24 of the key 5 is made of an elastic member, and the projection 23 located above the rotary drum 20 among the plurality of projections 23 is applied from below. When the key 5 is pressed with the projection 23 located on the upper part of the rotary drum 20 coming in contact with the lower side and pushing up the key 5 when the key 5 is pushed up in contact with the key 5 Furthermore, by allowing the key 5 to be pressed down by being elastically deformed, it is possible to perform a normal performance by a player's key pressing operation in addition to an automatic performance.

  That is, in this electronic keyboard instrument, when the key 5 is pressed while the key 5 is pushed up in contact with the protrusion 23 located on the upper portion of the rotary drum 20, the key operation unit 24 is elastically deformed. The key 5 can be pushed down, and the key 5 can turn on the key switch unit 16, so that the player can perform a normal performance by pressing the key.

  In the above-described first embodiment, the case where the weight portion 25 is provided at the front portion of each key 5 as the biasing member for biasing the plurality of keys 5 in the pulling-down direction has been described. There is no need to urge the keys 5 in the pulling-down direction due to the weight of the portion 25. For example, a spring member is used as the urging member, and each key 5 is urged in the pulling-down direction by the spring force of the spring member. It may be configured.

(Embodiment 2)
Next, a second embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
As shown in FIGS. 8 and 9, this electronic keyboard instrument has a configuration in which each key operation unit 40 provided on each of the plurality of keys 5 is different from that of the first embodiment, and is otherwise substantially the same as that of the first embodiment. It is configured.

  That is, as shown in FIGS. 8 and 9, each key operation unit 40 provided for each of the plurality of keys 5 passes through the front side (right side in FIG. 8) of the rotary drum 20 from each key 5. It extends to the lower side, and a contact portion 40a is provided at each of the extended tip portions so as to protrude toward the lower portion of the rotary drum 20.

  In this case, a plurality of protrusions 41 are provided on the outer peripheral surface of the rotary drum 20 corresponding to the plurality of keys 5, as in the first embodiment. In order to operate each key 5 in accordance with the musical score of the performance tune, the plurality of protrusions 41 are arranged in the circumferential direction on the outer peripheral surface of the rotary drum 20 with the plurality of protrusions 41 corresponding to the musical notes. Are provided respectively.

  Further, as shown in FIG. 8, the plurality of keys 5 include elastic return force of each bent portion 10 located at each rear end portion thereof, and each bulging portion 19 a provided on the rubber sheet 19 of the key switch portion 16. It is configured to be pushed up by the elastic restoring force. Accordingly, as shown in FIG. 10, each key operation unit 40 of the plurality of keys 5 includes a protrusion 41 located below the rotary drum 20 among the plurality of protrusions 41, and a contact portion of the key operation unit 40. When the abutting portion 40a of the key operating portion 40 is pushed down by the projection 41 when the abutting portion 40a comes into contact with the upper side, the key 5 is pulled down.

  Further, as shown in FIG. 8, each key operation unit 40 of the plurality of keys 5 is in contact with each key operation unit 40 between the projections 41 positioned below the rotary drum 20 among the plurality of projections 41. When the part 40a corresponds, each key 5 is pushed up by each elastic return force of each bending part 10 and each bulging part 19a of the rubber sheet 19, so that the contact part 40a of each key operating part 40 is Each key 5 is configured to be returned to the initial position by being inserted between the protrusions 41 from below.

  Further, as shown in FIG. 8, each key operation unit 40 of the plurality of keys 5 is inserted between the projections 41 positioned below the rotary drum 20 among the plurality of projections 41 provided on the rotary drum 20. In this state, when the key 5 is depressed, the abutment portion 40a of the key operation portion 40 is released downward from between the projections 41, and the key 5 is pushed down, as shown in FIG. It is configured.

  In this case, the plurality of keys 5 are configured to eliminate the weight portion 25 that is an urging member for turning on the key switch portion 16 by urging them so as to push them down. For this reason, the key switch unit 16 is configured to pull down the key 5 when the projection 41 located below the rotary drum 20 among the plurality of projections 41 comes into contact with the contact portion 40a of the key operation unit 40 from above. The abutting portion 40a of the key operating portion 40 is correspondingly moved between the protrusions 41 located at the lower portion of the rotary drum 20 and is turned off when the key 5 returns to the initial position. Yes.

Next, the operation of such an electronic keyboard instrument will be described.
When performing an automatic performance with this electronic keyboard instrument, as in the first embodiment, the motor unit 21 may be driven to rotate the rotary drum 20 in the vertical direction. When the rotating drum 20 rotates in this way, the plurality of protrusions 41 provided on the outer peripheral surface thereof rotate and move up and down together with the rotating drum 20.

  Then, when any one of the plurality of protrusions 41 reaches the lower part of the rotating drum 20, the protrusion 41 that reaches the lower part of the key operation part 40 of the key 5, as shown in FIG. 10. The key operation unit 40 is pushed down by contacting the contact portion 40a from above. As a result, the key 5 rotates downward (clockwise in FIG. 10) about the bent portion 10, and the switch pressing portion 15 of the key 5 presses the key switch portion 16 to turn it on. As a result, the key switch unit 16 outputs a switch signal, and the speaker unit 6 generates a musical tone based on the switch signal.

  Thereafter, when the rotating drum 20 further rotates, the abutting portion 40a of the key operating portion 40 of the key 5 gets over the protruding portion 41 located at the lower portion of the rotating drum 20, and corresponds to the next protruding portion 41. At this time, the key 5 is pushed up by the elastic return force of the bent portion 10 located at the rear end portion of the key 5 and the elastic return force of the bulging portion 19 a provided on the rubber sheet 19 of the key switch portion 16. As a result, as shown in FIG. 8, the abutting portion 40 a of the key operating portion 40 of the key 5 is inserted between the protrusions 41 located at the lower portion of the rotary drum 20 from below.

  Then, as shown in FIG. 8, the stopper portion 13 at the front end of the key 5 comes into contact with the position restricting portion 14 of the lower case 3 from below and is restricted to the initial position which is the upper limit position. At this time, the switch pressing portion 15 of the key 5 is positioned above the key switch portion 16, the bulging portion 19 of the key switch portion 16 is elastically restored to the dome shape, and the key switch portion 16 is turned off. As a result, the speaker unit 6 stops generating the musical sound.

  Each operation of the key 5 and the key switch unit 16 is the same as that of the first embodiment in that the rubber sheet 19 provided on the switch substrate 18 of the plurality of keys 5 and the key switch unit 16 arranged in the keyboard unit 4 is operated. All of the bulging portions 19a sequentially operate in accordance with the rotational movement of the plurality of protrusions 41 provided on the rotating drum 20.

  Thereby, the musical sound according to the score of a performance music is generated from the speaker part 6, and an automatic performance is performed. In such an automatic performance, as in the first embodiment, since the plurality of keys 5 rotate up and down in accordance with the performance music, a beginner can confirm the movement of the keys 5 as an image. Can be easier to remember.

  And when stopping this automatic performance, the drive of the motor part 21 should just be stopped. At this time, out of the plurality of protrusions 41 provided on the outer peripheral surface of the rotary drum 20, any one of the protrusions 41 corresponding to each key 5 is positioned at the lower part of the rotary drum 20, and The abutment portions 40a of the key operation portions 40 of the plurality of keys 5 are inserted between the protrusion portions 41, respectively, and the keys 5 are regulated to the initial positions.

  On the other hand, when the performer operates the electronic keyboard musical instrument, the performer only needs to press each of the plurality of keys 5. At this time, the abutment portions 40a of the key operation portions 40 of the plurality of keys 5 are respectively inserted between the projection portions 41 located below the rotary drum 20, and each key 5 is restricted to the initial position. Thus, in this state, the performer can perform a key pressing operation on each of the plurality of keys 5.

  That is, when the performer performs a key pressing operation on each of the plurality of keys 5, as shown in FIG. 11, the contact portion 40 a of the key operation portion 40 of the key 5 inserted between the protrusions 41 of the rotary drum 20. It is pushed down and detached from between the protrusions 41 downward. As a result, the key 5 rotates downward (clockwise in FIG. 11) around the bent portion 10 and is pressed down, and the switch pressing portion 15 of the pressed key 5 turns on the key switch portion 16. Accordingly, the key switch unit 16 outputs a switch signal, and the speaker unit 6 generates a musical sound based on the switch signal from the key switch unit 16.

  As described above, according to the electronic keyboard instrument of the second embodiment, when the rotary drum 20 is rotated, the plurality of protrusions 41 provided on the rotary drum 20 are respectively provided on the keys 5. Since each key 5 can be rotated in the vertical direction by moving toward and away from the contact portion 40a of the operation unit 40, a plurality of keys 5 can be automatically operated as in the first embodiment. .

  Therefore, the plurality of keys 5 can be operated according to the generated musical tone, and the rotary drum 20 having the plurality of protrusions 41 can be rotated to the lower side of each key 5 having the key operation unit 40. Since it only needs to be arranged, the structure is simple as in the first embodiment, and a plurality of keys 5 can be automatically operated to perform an automatic performance. As a result, the plurality of keys 5 rotate in the vertical direction in accordance with the musical performance, so that a beginner can confirm the movement of the key 5 as an image, and thus the musical performance can be easily remembered.

  In this case, the key operation unit 40 of the key 5 corresponds to the space between the protrusions 41 located below the rotary drum 20 by pulling down the key 5 when the protrusions 41 located below the rotary drum 20 come into contact with each other. At this time, the operation of lowering the key 5 is released so that the key 5 can be returned to the initial position. Therefore, the key operation unit 40 of the key 5 is surely pushed down by the protrusion 41 located at the lower part of the rotary drum 20. be able to.

  In addition, the key operation unit 40 of the key 5 reliably pushes down the key 5 when the contact portion 40a of the key operation unit 40 of the key 5 corresponds to the protrusion 41 located at the lower part of the rotary drum 20. The abutment portion 40a of the key operation portion 40 of the key 5 can be satisfactorily inserted between the protrusions 41 located at the lower portion of the rotary drum 20, so that the key 5 is reliably and satisfactorily initialized. The key switch unit 16 can be turned off while being returned to the position.

  That is, when the abutment portion 40a of the key operation portion 40 of the key 5 corresponds to the protrusion 41 located at the lower portion of the rotary drum 20, the elastic restoring force of the bent portion 10 located at the rear end portion of the key 5 is obtained. , And the elastic return force of the bulging portion 19 a provided on the rubber sheet 19 of the key switch portion 16, so that the key 5 is pushed up, so that any one of the protrusions 41 positioned below the rotary drum 20 The abutting portion 40a of the key operating portion 40 can be reliably and satisfactorily inserted from the lower side, whereby the key 5 can be reliably pushed up, so that the key switch portion 16 is reliably and satisfactorily turned off. be able to.

  Also in the electronic keyboard instrument of the second embodiment, the abutting portion 40a of the key operating portion 40 of the key 5 is inserted between the protrusions 41 located at the lower portion of the rotary drum 20, and the key 5 is pushed up. When the key 5 is pressed in this state, the abutment portion 40a of the key operation portion 41 is detached downward from between the protrusions 41, and the key 5 can be pushed down. The player presses the key 5 in a state where the contact portion 40a of the key operation portion 40 is inserted between the plurality of protrusion portions 41 provided on the drum 20 and the key 5 is regulated at the initial position. As a result, the key 5 can be pushed down, whereby the key 5 can turn on the key switch unit 16, so that the player can perform a normal performance.

  In addition, the electronic keyboard instrument of the second embodiment further includes a switch unit 16 that performs a switch operation when each of the plurality of keys 5 rotates in the vertical direction. The key switch unit 16 includes a plurality of protrusions. When the protrusion 41 located at the lower part of the rotating drum 20 abuts against the abutting part 40 a of the key operating part 40 from the upper side and pulls down the key 5, the on-operation is performed and located at the lower part of the rotating drum 20. Since the abutting portion 40a of the key operating portion 40 corresponds between the protruding portions 41 to be turned off and the key 5 returns to the initial position, the rotation of the rotary drum 20 is performed as in the first embodiment. The key switch unit 16 can be surely switched to output a switch signal by rotating the key 5 in the up-and-down direction according to the operation. It can be generated to.

  In the first and second embodiments described above, the case where the output shaft 21a of the motor unit 21 is directly connected to the support shaft 20a of the rotary drum 20 has been described. A reduction device may be attached to the shaft 21 a, and the rotation of the motor unit 21 may be reduced by this reduction device and transmitted to the rotary drum 20.

  In the first and second embodiments described above, the support shaft 20 a provided at one end portion of the rotating drum 20 is connected to the output shaft 21 a of the motor portion 21, and the bearing portion 20 b provided at the other end portion of the rotating drum 20. The case where the rotating drum 20 is configured to be rotatably disposed on the lower case 3 by inserting the distal end portion 22a of the support member 22 in a rotatable manner has been described. You may comprise so that 20 may be attached to the lower case 3 so that attachment or detachment is possible.

  If comprised in this way, since the rotating drum 20 can be replaced | exchanged, the projection part which differs for every musical score of a performance music is each provided in the some rotation drum 20, and this several rotation drum 20 is replaced according to a performance music. By doing so, it is possible to enjoy performance music according to various musical scores by automatic performance.

  Furthermore, although Embodiment 1 and 2 mentioned above and its modification demonstrated the case where the rotating drum 20 was comprised so that it might rotate with the motor part 21, it is not necessary to rotate the rotating drum 20 by the motor part 21, For example, the rotating drum 20 may be configured to rotate by a spiral spring member such as a spring.

As mentioned above, although several embodiment of this invention was described, this invention is not restricted to these, The invention described in the claim and its equal range are included.
The invention described in the claims of the present application will be appended below.

(Appendix)
The invention according to claim 1 is a state in which a plurality of keys provided so as to be vertically rotatable in a state of being arranged in parallel with the instrument body, and a state along the arrangement direction of the keys below the plurality of keys The rotary drum is rotatably arranged in the vertical direction, and a plurality of protrusions are provided on the outer peripheral surface corresponding to the plurality of keys, respectively, and the rotation drum is provided on each of the plurality of keys. A keyboard device, comprising: a key operation unit configured to rotate each of the keys in the vertical direction by contacting and separating the plurality of protrusions according to an operation.

  According to a second aspect of the present invention, in the keyboard device according to the first aspect, the key operation portion of the key includes the plurality of protrusions, the protrusions positioned above the rotating drum being on the lower side. The key is pushed up when it comes into contact with the rotary drum, and when it corresponds to the gap between the protrusions located on the upper part of the rotating drum, the key is released and the key can be pulled down. This is a keyboard device.

  A third aspect of the present invention is the keyboard apparatus according to the second aspect, further comprising a biasing member that biases each of the plurality of keys in a pulling-down direction.

  According to a fourth aspect of the present invention, in the keyboard device according to the second or third aspect, the switch device further includes a switch unit that performs a switch operation when the plurality of keys rotate in the vertical direction. Of the plurality of protrusions, when the protrusion located on the upper part of the rotating drum comes into contact with the key operating part from the lower side and pushes up the key, the off operation is performed on the upper part of the rotating drum. The keyboard device is characterized in that when the key is pulled down by the biasing member corresponding to the key operating portion between the protruding portions positioned, the keyboard device is turned on.

  According to a fifth aspect of the present invention, in the keyboard device according to the second to fourth aspects, the key operation part of the key is made of an elastic member, and the upper part of the rotating drum among the plurality of protrusions. When the protrusion located on the lower side contacts from the lower side and pushes up the key, almost no elastic deformation occurs, and the protrusion located on the upper part of the rotating drum comes into contact from the lower side and the key is pushed up. In this state, when the key is pressed, the keyboard device is elastically deformed to enable the key pressing operation.

  According to a sixth aspect of the present invention, in the keyboard device according to the first aspect, the key operating portion of the key is configured such that, of the plurality of protruding portions, the protruding portion positioned below the rotating drum is from above. When abutting, the key is pulled down, and when it corresponds between the protrusions located at the lower part of the rotating drum, the key lowering operation is released so that the key can be returned to the initial position. The keyboard device is characterized by the following.

  According to a seventh aspect of the present invention, in the keyboard device according to the sixth aspect, the key operation part of the key is inserted between the protrusions positioned below the rotary drum among the plurality of protrusions. In this state, when the key is pressed, the keyboard is released from between the protrusions to enable the key to be pressed down.

  According to an eighth aspect of the present invention, in the keyboard device according to the sixth or seventh aspect, the switch device further includes a switch unit that performs a switch operation when the plurality of keys rotate in the vertical direction. Is turned on when the protrusion located at the lower part of the rotating drum comes into contact with the key operating part from above and pulls down the key, and is located at the lower part of the rotating drum. The keyboard device according to claim 1, wherein the key operation unit is turned off when the key returns to the initial position in correspondence with the protrusions.

DESCRIPTION OF SYMBOLS 1 Musical instrument body 2 Upper case 3 Lower case 4 Keyboard part 5 Key 6 Speaker part 10 Key bending part 11 Key connection part 15 Switch pressing part 16 Key switch part 18 Switch board 19 Rubber sheet 19a Domed bulge part 20 Rotation Drum 21 Motor part 23, 41 Plural protrusions 24, 40 Key operation part 40a Contact part

Claims (8)

A plurality of keys provided so as to be vertically rotatable in a state of being arranged in parallel on the instrument body;
A rotating drum disposed below the plurality of keys so as to be rotatable in the vertical direction in a state along the arrangement direction of the keys, and provided with a plurality of protrusions on the outer peripheral surface corresponding to the plurality of keys, respectively. When,
A key operation unit that is provided on each of the plurality of keys, and that causes each of the keys to rotate up and down by contacting and separating the plurality of protrusions according to the rotation operation of the rotary drum;
A keyboard device characterized by comprising:   2. The keyboard device according to claim 1, wherein the key operation unit of the key presses the key when the projecting portion located above the rotating drum among the plurality of projecting portions abuts from below. A keyboard apparatus, wherein the key is released by pushing up and releasing the key when it corresponds to the gap between the protrusions positioned above the rotating drum.   The keyboard apparatus according to claim 2, further comprising a biasing member that biases the plurality of keys in a pulling-down direction. The keyboard device according to claim 2 or 3, further comprising a switch unit that performs a switch operation when each of the plurality of keys rotates in a vertical direction.
The switch portion is turned off when the projection portion, which is located above the rotary drum among the plurality of projection portions, comes into contact with the key operation portion from the lower side to push up the key, and the rotary drum A keyboard device that is turned on when the key operating unit is correspondingly moved between the projecting portions located above the key and the key is pulled down by the biasing member.   5. The keyboard device according to claim 2, wherein the key operation portion of the key is made of an elastic member, and the protrusion portion positioned above the rotating drum among the plurality of protrusion portions is on the lower side. When the key is pushed up by abutting from the top, the key is not elastically deformed, and the key is pushed down in a state where the protrusion located at the upper part of the rotating drum is abutted from the lower side and the key is pushed up. A keyboard device characterized by being elastically deformed to enable the key to be depressed.   2. The keyboard device according to claim 1, wherein the key operation unit of the key presses the key when the projections located at the lower part of the rotary drum among the plurality of projections abut from above. A keyboard device characterized in that when the key is pulled down and corresponds between the protrusions located at the lower part of the rotary drum, the key pulling-down operation is canceled and the key can be returned to the initial position.   7. The keyboard device according to claim 6, wherein the key operating portion of the key is pressed between the plurality of protrusions inserted between the protrusions positioned below the rotary drum. A keyboard device characterized in that when operated, the keyboard device is released downward from between the protrusions to enable the key to be depressed. The keyboard device according to claim 6 or 7, further comprising a switch unit that performs a switch operation when each of the plurality of keys rotates in the vertical direction,
The switch portion is turned on when the projection portion, which is located below the rotary drum among the plurality of projection portions, comes into contact with the key operation portion from above and pulls down the key, A keyboard device that is turned off when the key operating unit corresponds between the projecting portions located below and the key returns to the initial position.

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