JP5463764B2 - Electronic musical instrument keyboard device - Google Patents

Description

  The present invention relates to a keyboard device for an electronic musical instrument such as an electronic organ or an electronic piano.

  Conventionally, for example, as shown in Patent Document 1 below, a drive unit for driving a lever that swings in conjunction with the swing of a key is extended vertically downward from the bottom of each key. There is known a keyboard device in which a lower end portion of a driving portion is engaged with a front end portion of a lever through an opening provided in a frame. Also, as shown in Patent Document 2 below, a keyboard device having an illuminator that illuminates a key to be depressed is also known for a key depression operation guide for a performer. In these keyboard devices, each white key drive unit has the same position in the front-rear direction, and each black key drive unit has the same front-rear direction position, but the white key drive unit and the black key drive are the same. The parts are separated from each other in the front-rear direction. In addition, as shown in Patent Documents 1 and 2 below, a keyboard device is also known in which a key guide is provided at the front portion of a key frame to slidably contact each key and guide the rocking of the key. . Since this key guide is provided corresponding to each key, it is provided in parallel in the horizontal direction (key arrangement direction). Further, the key guide for the white key and the key guide for the black key are separated from each other in the front-rear direction.

JP-A-9-244623 Japanese Patent No. 36551297

  However, in the above-described conventional keyboard device, the white key driving unit and the black key driving unit are separated from each other in the front-rear direction, and thus it is necessary to provide openings for two rows of the driving units at the front part of the key frame. was there. Therefore, since a large space is required in the front-rear direction at the front portion of the keyboard device, the size of the key frame in the front-rear direction is large. The key guide for the white key and the key guide for the black key are also separated from each other in the front-rear direction. Therefore, in order to provide the key guide, a space for two rows of the key guide is secured in the front part of the key frame. It was necessary to keep. In particular, in a keyboard apparatus equipped with an illuminator for guiding the performance of the performer, a space for arranging the illuminator must be secured in the front part of the key frame. It was.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a keyboard device including an illuminator that illuminates a key to be depressed to guide a player's performance. An object of the present invention is to provide a keyboard device for an electronic musical instrument that is reduced in weight by reducing the size in the front-rear direction of the electronic musical instrument and at a reduced cost.

In order to achieve the above object, the present invention is characterized in that a plurality of white keys (11a) and a plurality of black keys (11b) that swing up and down by pressing and releasing keys are formed to extend in the front-rear direction. A plurality of levers (18) driven by a plurality of white keys and a plurality of black keys and swinging in conjunction with a swing of the plurality of white keys and the plurality of black keys; a plurality of white keys; a plurality of black keys In the keyboard device of an electronic musical instrument having a key frame (12) assembled to the frame (FR) of the electronic musical instrument, the white key is provided with a plurality of fulcrum portions that support the key and a plurality of levers in a swingable manner. A white key drive unit (17a) for driving the lever, the white key drive unit formed behind the front end of the white key and ahead of the support part of the lever; A black key drive unit (17b) for driving the lever. A black key drive portion formed in front of the front end of the black key appearance portion and in front of the fulcrum portion of the lever, and the positions of the white key drive portion and the black key drive portion in the front-rear direction are The white key illuminating board (24), which is the same and has an illuminator for selectively illuminating the white key, and the black key illuminating board (30), which is assembled with an illuminator for selectively illuminating the black key. ), And key guides for guiding the swinging of the white key and the black key are juxtaposed in the same position in the front-rear direction of the key frame, and in front of the white key drive unit and the black key drive unit , The white key illumination board is assembled to the key frame at the front, and the black key illumination board is assembled to the key frame behind the white key drive unit and the black key drive unit and behind the key guide . According to this, since the position in the front-rear direction of the white key driving unit and the black key driving unit is the same, an opening for one row of the driving units may be provided in the front part of the key frame. Therefore, the dimension of the key frame in the front-rear direction can be further reduced. Therefore, the keyboard device can be further reduced in weight, and the cost of the keyboard device can be further suppressed.

Further, since the key guide for the white key and the key guide for the black key are arranged side by side at the same position in the front-rear direction of the key frame, a space for one row of the key guide may be secured at the front portion of the key frame. Therefore, the dimension of the key frame in the front-rear direction can be reduced. Therefore, the keyboard device can be further reduced in weight, and the cost of the keyboard device can be further suppressed.

  Another feature of the present invention is that a white key illuminating board is assembled to the front end of the key frame, and a stopper part (27) for restricting displacement of a plurality of white keys is provided below the white key illuminating board. . In this case, the front end portion of the lever is positioned below the white key illumination substrate, and a stopper portion that restricts the displacement of the plurality of white keys and the plurality of black keys is provided between the white key illumination substrate and the front end portion of the lever. . According to this, since the position of the white key illumination board and the stopper portion in the front-rear direction is the same, the size of the key frame in the front-rear direction can be further reduced. Therefore, the keyboard device can be further reduced in weight, and the cost of the keyboard device can be further suppressed.

  Another feature of the present invention is that the key frame is assembled to the frame of the electronic musical instrument at the key frame fixing portion provided at the lower portion of the key frame, and the portion in front of the key frame fixing portion (22) is the electronic frame. This is because it is separated from the frame of the instrument. According to this, the amount of the resin material used for forming the key frame can be reduced. Therefore, the keyboard device can be reduced in weight, and the cost of the keyboard device can be suppressed.

  In addition, although the code | symbol in the said parenthesis shows the corresponding relationship with embodiment mentioned later in order to make an understanding of this invention easy, this invention is not limited to this.

It is a right view which shows the state which removed the black key from this keyboard apparatus, in order to show the structure of the white key of the keyboard apparatus which concerns on one Embodiment of this invention. It is a right view which shows the state which removed the white key from this keyboard apparatus, in order to show the structure of the black key of the keyboard apparatus which concerns on one Embodiment of this invention. It is a top view of the key frame of the keyboard apparatus of FIG. 1A and 1B. It is sectional drawing seen along the BB line of FIG. 2A. It is the right view which expanded the front-end part of the white key of the keyboard apparatus which concerns on the modification of this invention. It is the right view which expanded the front-end part of the black key of the keyboard apparatus which concerns on the modification of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the front side (left side in FIGS. 1A and 1B) viewed from the performer is referred to as “front”, and the back side (right side in FIGS. 1A and 1B) is referred to as “rear”. Further, the right side (the front side of the paper surface of FIGS. 1A and 1B) viewed from the performer is “right”, and the left side (the back side of the paper surface of FIGS. 1A and 1B) is “left”. Further, when viewed from the performer, the upper side (upper side in FIGS. 1A and 1B) is “upper”, and the lower side (lower side in FIGS. 1A and 1B) is “lower”. The left-right direction is referred to as the horizontal direction.

  1A and 1B are right side views of the keyboard device according to the present embodiment as viewed from the right side. This keyboard device has a plurality of white keys 11a and black keys 11b. FIG. 1A shows a state in which the black keys 11b are removed from the keyboard device in order to show the configuration of the white keys 11a. On the other hand, FIG. 1B shows a state in which the white key 11a is removed from the keyboard device in order to show the configuration of the black key 11b. The white key 11a and the black key 11b are each integrally molded in a long shape with a synthetic resin. The white key 11a is longer in the front-rear direction than the black key 11b. Further, the white key 11a has a smaller vertical width and a larger horizontal width than the black key 11b. Each of the white key 11a and the black key 11b has a thin upper wall extending in the front-rear direction and thin side walls extending downward from the left and right ends of the upper wall, and is formed in a hollow shape opened downward. Yes. The white key 11a and the black key 11b are supported by the key support portion 13 of the key frame 12 provided below, and the front end portion can swing up and down around the rotation center 14 at the rear end portion. It has become.

  As shown in FIGS. 2A and 2B, the key frame 12 is extended in the lateral direction by integral molding of resin. FIG. 2A shows a part of the key range in the middle part of the key frame 12. The key frame 12 includes a front plate 12a and a rear plate 12b that are wide in the front-rear direction and extend in the horizontal direction. The rear plate 12b is narrower in the front-rear direction than the front plate 12a. The key support portion 13 is formed so as to protrude upward from the upper surface of the rear plate 12b. The upper ends of a plurality of ribs 12d are connected to the lower surfaces of the front plate 12a and the rear plate 12b. The ribs 12d are thin in the horizontal direction and extend in the front-rear direction, and are provided at predetermined intervals in the horizontal direction. Further, the rib 12d projects forward from the front end of the front plate 12a. Extension portions 16, 21, and 23, which will be described later, are provided in the protruding portion.

  An extending portion 16 extends in the lateral direction so as to connect a portion located at the upper end portion of the adjacent rib 12d and below the front end portion of the black key 11b. The front-rear width of the extending portion 16 is narrower than the front-rear width of the front plate 12a and the rear plate 12b. A key guide 15 for guiding the swing of the white key 11a and the black key 11b is formed so as to protrude upward from the upper surface of the extended portion 16. The key guide 15 enters the white key 11a and the black key 11b from below, and the side surface of the key guide 15 and the inner surface of the side wall of the white key 11a and the black key 11b come into sliding contact with each other when the key is pressed or released. Yes. This suppresses a slight lateral displacement of the white key 11a and the black key 11b when the key is pressed or released.

  Further, a drive portion 17a extends downward from a portion located between the front end of the white key 11a and the key guide 15 in the middle portion of the white key 11a. The drive unit 17a has a thin front wall that extends vertically and a thin side wall that extends rearward from the left and right ends of the front wall, and is formed in a hollow shape that opens rearward. The lower end of the drive part 17a is closed by the lower end wall. On the other hand, the black key 11b has the same drive unit 17b as the white key 11a. The black key 11b extends downward from the front end of a portion protruding below the upper surface of the white key 11a in the key-released state (hereinafter referred to as the visible portion of the black key 11b), and then slightly curves forward. The upper end of the drive part 17b is connected to the front-end | tip of this connection part. The front-rear direction positions of the drive unit 17a and the drive unit 17b are the same, and the vertical positions of the lower end walls of the drive unit 17a and the drive unit 17b are also the same. That is, the drive parts 17a and 17b are located ahead of the front end of the apparent part of the black key 11b. The lower end portions of the drive portions 17 a and 17 b are engaged with the front end portion of the lever 18 in an opening portion that is provided on the front side of the extending portion 16 and opens upward and downward.

  The lever 18 swings in accordance with the key pressing operation, and applies an inertial force to each key. This simulates the key touch feeling of an acoustic piano. The lever 18 includes a lever base 18a made of synthetic resin and a mass body 18b made of metal. The lever base portion 18a is a plate-like member, and is supported by a lever support portion 20 provided at the lower portion of the key frame 12 by a hook portion 18a1 provided at the lower portion thereof so as to be rotatable around the axis of the pin 20a. ing. The lever support portion 20 extends from the upper surface of the extension portion 21 that extends in the lateral direction so as to connect the lower ends of the adjacent ribs 12d and is narrower in the front-rear direction than the front plate 12a and the rear plate 12b. It is integrally formed so as to protrude. The pins 20a that serve as the rotation shafts of the swing levers 18 of the white key 11a and the black key 11b are juxtaposed at the same position in the front-rear direction of the key frame 12. A boss 22 is integrally formed at the connecting portion between the rib 12d and the extending portion 21. The keyboard device is fixed to the frame FR of the electronic musical instrument by providing a through hole in the frame FR of the electronic musical instrument and passing a screw (not shown) through the through hole from below and screwing it into the boss 22.

  The lever base 18a includes a pair of upper and lower legs 18a2 and 18a3 at the front end, and the upper leg 18a2 is shorter than the lower leg 18a3. Between the leg portions 18a2 and 18a3, the lower end walls of the drive portions 17a and 17b enter. The leg portion 18a2 penetrates between the lower end walls of the drive portions 17a and 17b and an intermediate wall that forms a gap between the lower end walls in the drive portions 17a and 17b. Shock absorbers such as rubber, urethane, and felt are fitted and fixed to the lower end walls of the drive units 17a and 17b, the collision between the lower ends of the drive units 17a and 17b and the upper surfaces of the leg portions 18a3, and the drive units 17a and 17b. The impact caused by the collision between the lower end of 17b and the lower surface of the leg 18a2 is reduced. When the white key 11a and the black key 11b are released, the front end of the lever 18 is displaced upward by the weight of the lever 18 itself. At this time, the drive portions 17a and 17b are urged upward by the leg portion 18a3, and the front end portions of the white key 11a and the black key 11b are displaced upward. On the other hand, when the white key 11a and the black key 11b are pressed, the lower end surfaces of the drive portions 17a and 17b press the upper surface of the leg portion 18a3, and the front end portion of the lever 18 is displaced downward.

  The mass body 18b is formed in a plate shape and is assembled to the rear end of the lever base portion 18a. The mass body 18b may be common to all the white keys 11a and the black keys 11b, or in order to more faithfully simulate the key touch feeling of an acoustic piano, with each key or The mass body 18b may be lightened for each key range.

  Moreover, the extending part 23 is extended in the horizontal direction so that the front-end part of the adjacent rib 12d may be connected. The width of the extending portion 23 in the front-rear direction is narrower than the width in the front-rear direction of the front plate 12a and the rear plate 12b. In a state where the keyboard device is assembled to the frame FR of the electronic musical instrument, the extending portion 23 is spaced upward from the frame FR. Further, in a state where the keyboard device is assembled to the frame FR of the electronic musical instrument, the front portion of the rib 12d and ahead of the connecting portion between the rib 12d and the extending portion 21 is also separated from the frame FR. . On the upper surface of the extension portion 23, a white key illumination circuit for controlling the lighting and extinction of the illuminators LW (for example, LEDs) provided corresponding to the respective white keys 11a is provided on the upper surface of the extending portion 23 to guide the player to press the keys. The board | substrate 24 which has is assembled | attached. The illuminator LW is assembled to the front portion of the substrate 24. In addition, you may provide the light-shielding plate for illuminating only the corresponding white key 11a in the circumference | surroundings of each illuminator LW, preventing the light leak to an adjacent key. A boss 25 is integrally provided at a connection portion between the extending portion 23 and the rib 12 d, and the substrate 24 is fixed to the boss 25 with a screw 26. Note that it is not necessary to provide the bosses 25 at all connecting portions between the ribs 12d and the extending portions 23, and only the predetermined portions may be provided. However, if the distance between the bosses 25 is too large, the substrate 24 in between is bent by its own weight. For example, the bosses 25 may be provided so that one or two octaves can be fixed with the screws 26.

  Further, a long upper limit stopper 27 made of an impact absorbing material such as felt is extended and fixed to the lower surface of the extending portion 23 in the lateral direction. The upper limit stopper 27 restricts the upward displacement of the front end portions of the white key 11a and the black key 11b during key release by restricting the upward displacement of the front end portion of the lever 18.

  In addition, a notch 12d1 is formed in the middle portion of each rib 12d. In order to form the notch 12d1 by integral molding, a rectangular through hole 12a1 penetrating from the upper surface to the lower surface is provided in an intermediate portion of the front plate 12a located above the notch 12d1. Since FIG. 2A shows a part of the key range in the middle part of the key frame 12, a part of the through hole 12a1 at the right end part and the left end part of FIG. 2A is shown. The right end and the left end of the front plate 12a located above the notch 12d1 of the rib 12d located at the right end and the left end of the key frame 12 are respectively inward from the right end and the left end of the front plate 12a. A cutout is formed in a rectangular shape. And the elongate lower limit stopper 28 comprised with shock absorbers, such as a felt, is extended and fixed to the lower surface of the front board 12a through the notch 12d1 of the rib 12d. The lower limit stopper 28 restricts the downward displacement of the front end portions of the white key 11a and the black key 11b when the key is depressed by restricting the upward displacement of the rear portion of the lever 18.

  In addition, a switch drive unit 29 is provided on the lower surface of the intermediate part of the white key 11a and the black key 11b. The switch drive unit 29 is in contact with the upper surface of the switch 31 disposed on the substrate 30. The switch 31 is provided for each key, and is pressed along with the swing of each key to detect the pressed / released state of each key. In addition, a rectangular through hole 30a penetrating from the upper surface to the lower surface is provided in a middle portion of the substrate 30 at a position corresponding to the first holding portion 32 formed integrally with the front plate 12a. A black key illumination circuit similar to the white key illumination circuit is provided at the front end of the substrate 30. The black key illumination circuit controls lighting and extinguishing of an illuminator LB (for example, LED) provided corresponding to each black key 11b for the key pressing operation guide for the performer. The illuminator LB is assembled to the front portion of the substrate 30. As with the substrate 24, a light shielding plate for preventing light leakage to the adjacent key and illuminating only the corresponding black key 11b may be provided around each light emitting element. The substrate 30 is held by the first holding unit 32 and the second holding unit 33.

  In the above embodiment, the front-rear direction positions of the drive unit 17a of the white key 11a and the drive unit 17b of the black key 11b are made the same. That is, the drive unit 17a and the drive unit 17b are arranged in a row in the horizontal direction. When the drive unit 17a and the drive unit 17b are separated from each other in the front-rear direction, an opening is formed in the key frame 12 in order to extend the drive unit 17a and the drive unit 17b downward from the bottom of each key and engage the lever 18. Must be provided respectively. That is, it is necessary to provide openings for two rows of drive units in the key frame 12, but according to the above embodiment, it is only necessary to provide openings for one row of drive units in the key frame 12. The dimension in the front-rear direction can be reduced. Therefore, the keyboard device can be reduced in weight. In addition, the cost of the keyboard device can be suppressed. The drive units 17a and 17b are positioned in front of the front end of the black key 11b. Therefore, the front end portion of the substrate 30 can be positioned below the front end portion of the apparent portion of the black key 11b. Therefore, the front end portion of the apparent portion of the black key 11b can be illuminated by the illuminator LB assembled to the front portion of the substrate 30. Moreover, since the board | substrate 24 was assembled | attached to the extension part 23 provided in the front-end part of the rib 12d, the front-end part of the white key 11a can be illuminated by the illuminator LW assembled | attached to the front part of the board | substrate 24. FIG.

  Further, the key guide 15 was formed so as to protrude upward from the upper surface of the extending portion 16 extending in the lateral direction. That is, the key guides 15 that guide the swing of the white key 11a and the black key 11b are arranged in a row in the horizontal direction. Therefore, two rows of extending portions for forming the key guide 15 are provided, and the dimension of the key frame 12 in the front-rear direction is larger than when one is for the white key 11a and the other is for the black key 11b. Can be small.

  In addition, since the upper limit stopper 27 is assembled to the lower surface of the extended portion 23, the dimension of the key frame 12 in the front-rear direction can be reduced as compared with a case where a support portion for assembling the upper limit stopper 27 is separately provided. . Further, in a state where the keyboard device is assembled to the frame FR of the electronic musical instrument, the extension portion 23 is spaced upward from the frame FR of the electronic musical instrument, and the front end of the lever 18 is below the extension portion 23. It was designed to be a space for swinging up and down. In the rib 12d, the portion in front of the connecting portion with the extending portion 21 is separated from the frame FR of the electronic musical instrument. Therefore, the amount of resin used to form the key frame 12 can be reduced as compared with the conventional keyboard device, and the keyboard device can be reduced in weight. In addition, the cost of the keyboard device can be suppressed.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

  In the above embodiment, the front and rear positions of the drive unit 17a of the white key 11a and the drive unit 17b of the black key 11b are made the same, and the front and rear direction of the key guide 15 of the white key 11a and the key guide 15 of the black key 11b. The position was the same. However, the position in the front-rear direction of the drive unit 17a of the white key 11a and the drive unit 17b of the black key 11b may be made the same. When configured in this manner, the size in the front-rear direction of the key frame 12 is slightly larger than that in the above embodiment, but the size in the front-rear direction of the key frame 12 can be reduced as compared with the conventional keyboard device.

  Further, in the above embodiment, the upper end stopper 27 assembled to the lower surface of the extending portion 23 is brought into contact with the leg portion 18a3 provided at the front end portion of the lever 18 so that the upper end portion of the lever 18 is displaced upward. I tried to regulate it. Thus, the upward displacement of the front end portions of the white key 11a and the black key 11b at the time of key release is regulated. However, as shown in FIGS. 3A and 3B, protrusions 17a1 and 17b1 protruding forward from the lower ends of the drive parts 17a and 17b are provided, and the upper surfaces of the protrusions 17a1 and 17b1 are brought into contact with the upper limit stopper 27. It may be. Further, as shown in FIGS. 3A and 3B, the leg 18 a 2 may not be provided at the front end of the lever 18. Even if comprised in this way, the upward displacement at the time of the key release of the white key 11a and the black key 11b can be controlled.

  Further, in the above-described embodiment and its modifications, the long upper limit stopper 27 constituted by an impact absorbing material such as felt is assembled to the lower surface of the extending portion 23. However, instead of this, the upper limit stopper may be made of an elastomer and integrally formed on the lower surface of the extended portion 23 by two-color molding. If comprised in this way, since the process of assembling the upper limit stopper 27 to the extending part 23 can be omitted, the assemblability of the keyboard device is improved.

11a ... White key, 11b ... Black key, 12 ... Key frame, 15 ... Key guide, 13 ... Key support, 17a, 17b ... Drive, 18 ... Lever , 22 ... boss, 24, 30 ... substrate, 25 ... boss, 27 ... upper limit stopper, FR ... frame

Claims (4)

A plurality of white keys and a plurality of black keys that swing up and down by pressing and releasing keys;
A plurality of levers that are formed so as to extend in the front-rear direction, are driven by the plurality of white keys and the plurality of black keys, and swing in conjunction with the swing of the plurality of white keys and the plurality of black keys;
In the keyboard device of the electronic musical instrument having a plurality of support parts for swingably supporting the plurality of white keys, the plurality of black keys, and the plurality of levers, and a key frame assembled to the frame of the electronic musical instrument,
The white key is a white key drive unit for driving the lever, and has a white key drive unit formed behind the front end of the white key and ahead of the support part of the lever,
The black key is a black key driving unit for driving the lever, wherein the black key driving unit is formed in front of the front end of the black key appearance part and in front of the support part of the lever. Have
While making the position of the front and rear direction of the white key drive unit and the black key drive unit the same,
A white key illumination board assembled with an illuminator for selectively illuminating the white key;
A black key illumination board assembled with an illuminator for selectively illuminating the black key;
A key guide for guiding the rocking of the white key and the black key is juxtaposed at the same position in the front-rear direction of the key frame,
The white key illuminating board is assembled to the key frame in front of the white key driving unit and the black key driving unit and in front of the key guide, and behind the white key driving unit and the black key driving unit and in the key guide. A keyboard device for an electronic musical instrument, wherein the black key illuminating board is assembled to the key frame at the rear of the instrument. 2. The electronic device according to claim 1, wherein the white key illuminating board is assembled to a front end portion of the key frame, and a stopper part for restricting displacement of the plurality of white keys is provided below the white key illuminating board. Instrument keyboard device. A front end portion of the lever is positioned below the white key illumination substrate, and a stopper portion is provided between the white key illumination substrate and the front end portion of the lever to restrict displacement of the plurality of white keys and the plurality of black keys. The keyboard device for an electronic musical instrument according to claim 2 , wherein: The key frame is assembled to the frame of the electronic musical instrument at a key frame fixing portion provided at a lower portion of the key frame, and a portion in front of the key frame fixing portion is separated from the frame of the electronic musical instrument. electronic musical instrument keyboard apparatus according to claim 1 to 3, characterized in that the.

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