JP2012173556A - Keyboard device of electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assemblability and inspection efficiency of a keyboard device of an electronic musical instrument having a plurality of mutually different mass bodies.SOLUTION: An inertia moment around an oscillation center of each of a plurality of hammers 16w2, 16b2 is differentiated that respectively oscillate in synchronization with oscillation of a plurality of keys. An identifier for identifying each of the hammers 16w2, 16b2 is provided at a position, which is a respective surface of the plurality of hammers 16w2, 16b2, and which is visible in a state where the plurality of hammers 16w2, 16b2 are attached to a key frame 12f, but invisible in a state where the key frame 12f is attached to the electronic musical instrument. A marker for showing an attachment position of the hammers 16w2, 16b2 is provided at a position, which is a surface of the key frame 12f, and which is visible in a state where the plurality of hammers 16w2, 16b2 are attached to the key frame 12f, but invisible in a state where the key frame 12f is attached to the electronic musical instrument.

Description

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

  2. Description of the Related Art Conventionally, as shown in, for example, Patent Document 1 below, a keyboard of an electronic musical instrument that has an engaging portion that engages with a key and has a hammer that swings in conjunction with the swing of the key The device is known. In this keyboard device, the mass of the hammer is gradually reduced from the low sound part to the high sound part.

JP 2011-17907 A

  As mentioned above, the mass of the hammer is different for each pitch assigned to the key to be engaged. However, the difference in mass between the hammers whose pitches are close to each other is slight, and the difference in their shapes is also slight, so that it is difficult to identify each hammer. Therefore, the assemblability and inspection efficiency of the keyboard device have been reduced.

  The present invention has been made to solve the above problems, and an object of the present invention is to improve the assemblability and inspection efficiency of a keyboard device for an electronic musical instrument having a plurality of different mass bodies. In addition, in the description of each constituent element of the present invention below, in order to facilitate understanding of the present invention, reference numerals of corresponding portions of the embodiment are described in parentheses, but each constituent element of the present invention is The present invention should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals of the embodiments.

  In order to achieve the above object, a feature of the present invention is that a keyboard device for an electronic musical instrument having a plurality of different mass bodies (16w, 16b; 11w, 11b) and a support member (12) that supports the plurality of mass bodies. In the above, the identifier for identifying the mass body is visible on the surface of the plurality of mass bodies, the plurality of mass bodies being assembled to the support member, and the support member being assembled to the electronic musical instrument. Provided in an invisible area, corresponding to the identifier, and indicating the assembling position of each mass body on the surface of the support member and visible in a state where a plurality of mass bodies are assembled to the support member In addition, the support member is provided in a region that is not visible in a state where the support member is assembled to the electronic musical instrument.

  In this case, it is preferable that a plurality of keys that swing when operated by pressing and releasing keys are provided, and the plurality of mass bodies are a plurality of hammers that swing in conjunction with the swing of the plurality of keys. Further, in this case, the plurality of mass bodies may be a plurality of keys that swing by being pressed and released respectively.

  In this case, as an identifier, a mark including a character or symbol having an order concept may be provided. Moreover, you may provide the mark from which a color differs for every mass body as an identifier. Moreover, you may provide the mark from which a dimension differs for every mass body as an identifier. Moreover, you may provide the mark from which direction differs for every mass body as an identifier. Moreover, you may provide a mark in the different position in the said area | region for every mass body as an identifier. Further, as an identifier, a mark that is coded and readable by a predetermined device may be provided.

  According to the keyboard device of the electronic musical instrument configured as described above, the mass body may be assembled at a position where the mark corresponding to the identifier provided on the mass body is provided. Can be improved. Moreover, since the identifier provided on the mass body and the label provided on the support member are visible even after the mass body is assembled to the support member, the inspection efficiency of the assembly position of the mass body can be improved. Further, after the inspection, after the support member (that is, the keyboard device) is assembled to the electronic musical instrument, the identifier and the sign cannot be visually recognized from the outside, so that the appearance of the electronic musical instrument is not affected.

It is a right view which shows the structure regarding the white key of the keyboard apparatus which concerns on 1st Embodiment of this invention. It is a right view which shows the structure regarding the black key of the keyboard apparatus which concerns on 1st Embodiment of this invention. It is a characteristic curve figure which shows the relationship between a pitch and the mass of a mass body. It is a top view of the hammer for white keys and the hammer for black keys of FIG.1 and FIG.2. It is a side view which shows the positional relationship of each part of the hammer for white keys of FIG.1 and FIG.2, and the hammer for black keys. It is a characteristic curve figure which shows the relationship between a pitch and the inertia moment around the rocking | fluctuation center of a hammer. It is a characteristic curve figure which shows the relationship between a pitch and a key touch. It is a right view which shows the structure regarding the white key of the keyboard apparatus which concerns on 2nd Embodiment of this invention. It is a right view which shows the structure regarding the black key of the keyboard apparatus which concerns on 2nd Embodiment of this invention. It is a characteristic curve figure which shows the relationship between a pitch and the mass of a key. It is a top view of the keyboard apparatus which concerns on 2nd Embodiment of this invention. It is a top view which shows the example which attached | subjected the label | marker showing the assembly position of a hammer to the board | substrate. It is a top view which shows the example which attached | subjected the label | marker showing the assembly position of a hammer to the key guide. It is a top view which shows the example which attached | subjected the label | marker showing the assembly position of a hammer to the lower limit stopper of a key. It is a top view which shows the example which described hiragana one character at a time in 50 sound order as an identifier for identifying a key. It is a top view which shows the example which attached | subjected the mark from which a color differs for every key as an identifier for identifying a key. It is a top view which shows the example which attached | subjected the mark from which a dimension differs for every key as an identifier for identifying a key. It is a top view which shows the example which attached | subjected the mark from which the direction pointed for every key differs as an identifier for identifying a key. It is a top view which shows the example which marked the position which differs for every key as an identifier for identifying a key.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the side closer to the performer is referred to as “front side”, and the side farther from the performer is referred to as “rear side”. Further, the high sound side is referred to as “right side”, and the low sound side is referred to as “left side”.

  As shown in FIGS. 1 and 2, the keyboard device has a plurality of white keys 11w and a plurality of black keys 11b. The white key 11w and the black key 11b are each integrally molded in a long shape with a synthetic resin. The white key 11w is longer in the front-rear direction than the black key 11b. Further, the white key 11w has a smaller vertical width and a larger horizontal width than the black key 11b. Each of the white key 11w and the black key 11b has a thin upper wall extending in the front-rear direction and a thin side wall extending downward from the left and right ends of the upper wall, and is formed in a hollow shape opened downward. ing. Further, opposed through holes Kw and Kb are provided at the rear portions of the side walls of the white key 11w and the black key 11b, respectively. The white key 11 w and the black key 11 b are supported by the key support portion 13 of the key frame 12.

  The key frame 12 is extended in the left-right direction by integral molding of resin. The key frame 12 includes a front plate 12a and a rear plate 12b extending in the front-rear direction and the left-right 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 key support part 13 is formed in the shape of two plates facing each other, and includes a protruding part 13a facing inside. The protrusion 13a is fitted in the through hole Kw and the through hole Kb. As a result, the white key 11w and the black key 11b are supported so as to be rotatable around the protruding portion 13a, and the front end portion can swing in the vertical direction. Upper ends of a plurality of ribs 12d extending downward are integrally connected to the front plate 12a and the rear plate 12b. The ribs 12d are thin in the left-right direction and extend in the front-rear direction, and are provided at predetermined intervals in the left-right direction. Further, the rib 12d projects forward from the front end of the front plate 12a. A rail part 17, a rail part 19 and a rail part 21 which will be described later are provided on the protruding part. Further, a vertical wall 12e extends downward from the rear end of the rear plate 12b, and a horizontal plate 12f extends rearward from the lower end of the vertical wall 12e.

  In addition, a drive unit 11w1 extends downward from an intermediate portion of the white key 11w. The drive unit 11w1 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 unit 11w1 is closed by the lower end wall. On the other hand, the black key 11b has the same drive unit 11b1 as the white key 11w. The black key 11b extends downward from the front end of a portion protruding below the upper surface of the white key 11w (hereinafter referred to as the visible portion of the black key 11b) in the key release state, and then slightly curves forward. The upper end of the drive part 11b1 is connected to the tip of the connecting part. The front-rear direction positions of the drive unit 11w1 and the drive unit 11b1 are the same, and the vertical positions of the lower end walls of the drive unit 11w1 and the drive unit 11b1 are also the same. That is, the drive part 11w1 and the drive part 11b1 are located ahead of the front end of the visible part of the black key 11b. The details of the positions of the drive unit 11w1 and the drive unit 11b1 in the front-rear direction will be described later. The lower end portions of the drive portion 11w1 and the drive portion 11b1 are engaged with the front end portions of the hammer 16w and the hammer 16b, respectively, in an opening portion opened in the vertical direction provided in front of the front plate 12a.

  The hammer 16w includes a synthetic resin base 16w1, a metal connecting rod 16w2, and a mass body 16w3. Like the hammer 16w, the hammer 16b includes a base portion 16b1, a connecting rod 16w2, and a mass body 16b3. The base portion 16w1 and the base portion 16b1 are plate-like members and have a through hole Hw and a through hole Hb that penetrate from the right side surface to the left side surface. The rail part 17 which connects the lower end part of the adjacent rib 12d is extended in the intermediate | middle lower end part of the rib 12d. The rail portion 17 is narrower in the front-rear direction than the front plate 12a and the rear plate 12b. A hammer support portion 18w and a hammer support portion 18b are formed on the upper surface of the rail portion 17 so as to protrude upward. The hammer support portion 18w and the hammer support portion 18b are formed in two opposing plate shapes, and are provided with a protruding portion 18w1 and a protruding portion 18b1 that are respectively opposed to the inside. The protrusion 18w1 and the protrusion 18b1 are fitted in the through hole Hw and the through hole Hb, respectively. Accordingly, the base portion 16w1 and the base portion 16b1 are supported so as to be rotatable around the protruding portion 18w1 and the protruding portion 18b1. That is, the hammer 16w and the hammer 16b are supported so that the front end portion and the rear end portion can swing in the vertical direction. The hammer support portion 18 w is provided at the front portion of the rail portion 17, and the hammer support portion 18 b is provided at the rear portion of the rail portion 17. That is, the swing center of the hammer 16b is located behind the swing center of the hammer 16w. The longitudinal position of the swing center of the hammer 16w is common to all the hammers 16w, and the longitudinal position of the swing center of the hammer 16b is common to all the hammers 16b. Details of the position of the swing center of the hammer 16w and the hammer 16b in the front-rear direction will be described later.

  The base portion 16w1 includes a pair of upper and lower leg portions Fw1 and Fw2 at the front end, and the upper leg portion Fw1 is shorter than the lower leg portion Fw2. Similarly to the base portion 16w1, the base portion 16b1 also includes a pair of upper and lower leg portions Fb1 and Fb2 at the front end portion. The lower end wall of the drive unit 11w1 enters between the leg part Fw1 and the leg part Fw2, and the lower end wall of the drive unit 11b1 enters between the leg part Fb1 and the leg part Fb2. The leg part Fw1 and the leg part Fb1 are respectively a lower end wall of the drive part 11w1 and the drive part 11b1, and an intermediate wall that forms a gap between the lower end wall in the drive part 11w1 and the drive part 11b1. Intrusions. Shock absorbers such as rubber, urethane, and felt are fitted and fixed to the lower end walls of the drive unit 11w1 and the drive unit 11b1. This shock absorber includes a collision between the drive unit 11w1 and the upper surface of the leg part Fw2, a collision between the lower end of the drive part 11b1 and the upper surface of the leg part Fb2, a collision between the lower end of the drive part 11w1 and the lower surface of the leg part Fw1, and The impact caused by the collision between the lower end of the drive portion 11b1 and the lower surface of the leg portion Fb1 is alleviated.

  Front end portions of the connecting rod 16w2 and the connecting rod 16b2 are assembled to the rear end portions of the base portion 16w1 and the base portion 16b1, respectively. Each of the connecting rod 16w2 and the connecting rod 16b2 extends backward. The positions of the rear ends of the connecting rod 16w2 and the connecting rod 16b2 are the same. The lengths of the connecting rod 16w2 and the connecting rod 16b2 are set so that the rear ends of the mass body 16w3 and the mass body 16b3 described below are positioned slightly forward of the center of swing of the white key 11w and the black key 11b. It has been adjusted.

  The mass body 16w3 and the mass body 16b3 are assembled so that the centers of gravity of the mass body 16w3 and the mass body 16b3 coincide with the rear ends of the coupling rod 16w2 and the coupling rod 16b2. As shown in FIG. 3, the masses of the mass body 16w3 and the mass body 16b3 become lighter in order of pitches from the bass part to the treble part. In the present embodiment, as shown in FIG. 4, the external dimensions (for example, the length in the front-rear direction) of the mass body 16w3 and the mass body 16b3 are made smaller from the bass portion toward the treble portion. The masses of the mass body 16w3 and the mass body 16b3 with respect to the pitch may always be changed at a constant rate of change from the bass part to the treble part, or for each predetermined key range (for example, every octave). The rate of change may be different. Note that the mass of the base 16w1 and the base 16b1 and the mass of the connecting rod 16w2 and the connecting rod 16b2 are smaller than the mass of the mass 16w3 and the mass 16b3, so the center of gravity Gw of the hammer 16w and the center of gravity Gb of the hammer 16b are These are located on the mass body 16w3 and the mass body 16b3 side when viewed from the swing center of the hammer 16w and the hammer 16b, respectively.

  In the present embodiment, the distance from the swing center of the hammer 16w to the rear end of the connecting rod 16w2, the distance from the swing center of the hammer 16b to the rear end of the connecting rod 16b2, and the leg portion from the swing center of the hammer 16w. The distance from Fw2 to the contact portion Pw1 with the drive portion 11w1 and the distance from the swing center of the hammer 16b to the contact portion Pb1 with the drive portion 11b1 at the leg portion Fb2 are adjusted as follows. That is, in order to eliminate the difference in key touch due to the difference in the positional relationship between the key pressing position, the contact portion, the key swing center, and the hammer swing center between the white key 11w and the black key 11b, The moment of inertia around each swing center of the hammer 16b and the magnitude of the load applied to the hammer 16w and the hammer 16b by the key depression are adjusted.

  Here, a distance from the key pressing position of the white key 11w to the swing center of the white key 11w is a distance Lkw1, and a distance from the contact portion Pw1 to the swing center of the white key 11w is a distance Lkw2. Further, the distance from the key pressing position of the black key 11b to the rocking center of the black key 11b is a distance Lkb1, and the distance from the contact portion Pb1 to the rocking center of the black key 11b is a distance Lkb2. Further, as shown in FIG. 5, the distance from the swing center of the hammer 16w to the rear end of the connecting rod 16w2 is a distance Lwh1, and the distance from the swing center of the hammer 16w to the contact portion Pw1 is a distance Lwh2. The distance from the swing center of the hammer 16b to the rear end of the connecting rod 16b2 is a distance Lbh1, and the distance from the swing center of the hammer 16b to the tip of the connecting rod 16b2 is a distance Lbh2. At this time, the positions of the swing centers of the hammers 16w and the hammers 16b and the corresponding positions are set so that each distance satisfies the relationship of (Lhw2 / Lhw1) × (LkW2 / LkW1) = (Lhb2 / Lhb1) × (Lkb2 / Lkb1). The positions of the contact part Pw1 and the contact part Pb1 are adjusted. That is, the distance Lhb1 is longer than the distance Lhw1, and the distance Lhb2 is shorter than the distance Lhw2.

  As described above, since the mass of the mass body 16w3 gradually decreases as the pitch of the corresponding key increases, the distance from the swinging center of the hammer 16w to the center of gravity Gw is changed from the bass portion to the treble portion. It gets smaller gradually as you go. In addition, since the mass of the mass body 16b3 gradually decreases as the pitch of the corresponding key increases, the distance from the swing center of the hammer 16b to the center of gravity Gb also increases from the bass portion to the treble portion. It is getting smaller gradually. Furthermore, the distance from the swing center of the hammer 16b to the center of gravity Gb is smaller than the distance from the swing center of each adjacent hammer 16w to the center of gravity Gw.

  In other words, the moment of inertia around the oscillation center of the hammer 16w gradually decreases as it goes from the low sound part to the high sound part. In addition, the moment of inertia around the swing center of the hammer 16b is gradually reduced from the low sound portion toward the high sound portion. Further, the moment of inertia around the swing center of the hammer 16b is smaller than the moment of inertia around the swing center of each adjacent hammer 16w. That is, as shown in FIG. 6, in the characteristic curve diagram showing the moment of inertia around the swing center of the hammer 16w and the hammer 16b in order of the pitch, the characteristic curve of the hammer 16w and the characteristic curve of the hammer 16b are parallel to the lower right. And the characteristic curve of the hammer 16b is located below the characteristic curve of the hammer 16w.

  Further, on the upper surfaces of the hammer 16w and the hammer 16b (for example, the upper surfaces of the base portion 16w1 and the base portion 16b1), the corresponding key pitch names (C, C #, D...) Are used as identifiers for identifying the respective hammers. B) and key range numbers (1, 2,..., 7) are written. The pitch name and the key range number may be provided integrally with the base portion 16w1 and the base portion 16b1 by resin molding. Note that the pitch name and the key range number may be provided by printing, or separate parts describing the pitch name and the key range number may be assembled.

  When the white key 11w and the black key 11b are released, the front end of the hammer 16w and the hammer 16b is displaced upward by its own weight. At this time, the drive part 11w1 and the drive part 11b1 are urged upward by the leg part Fw2 and the leg part Fb2, respectively, and the front end parts of the white key 11w and the black key 11b are displaced upward, respectively. On the other hand, when the white key 11w and the black key 11b are pressed, the lower end surfaces of the driving unit 11w1 and the driving unit 11b1 press the upper surfaces of the leg portion Fw2 and the leg portion Fb2, respectively, and the front end portions of the hammer 16w and the hammer 16b are respectively downward. Displace to

  Moreover, the rail part 19 is extended in the left-right direction so that the front-end part of the adjacent rib 12d may be connected. The width in the front-rear direction of the rail portion 19 is narrower than the width in the front-rear direction of the front plate 12a and the rear plate 12b. A key guide 19w for guiding the swing of the white key 11w is formed so as to protrude upward from the upper surface of the rail portion 19. The key guide 19w enters the white key 11w from below, and the side surface of the key guide 19w and the inner surface of the side wall of the white key 11w are in sliding contact with each other when the key is pressed or released. Thereby, the slight displacement of the white key 11w in the left-right direction at the time of pressing and releasing is suppressed.

  In addition, the rail portion 21 extends in the left-right direction so as to connect the upper end portions of the adjacent ribs 12d and the portion located below the front end portion of the visible portion of the black key 11b. The width in the front-rear direction of the rail portion 21 is narrower than the width in the front-rear direction of the front plate 12a and the rear plate 12b. A key guide 21 b for guiding the swing of the black key 11 b is formed so as to protrude upward from the upper surface of the rail portion 21. The key guide 21b enters the black key 11b from below, and the side surface of the key guide 21b and the inner surface of the side wall of the black key 11b are in sliding contact with each other when the key is pressed or released. Thereby, the slight displacement of the black key 11b in the left-right direction at the time of pressing and releasing is suppressed.

  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 square-shaped through hole 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. And the elongate lower limit stopper 22 comprised with shock absorbers, such as a felt, is extended and fixed to the left-right direction through the notch 12d1 of the rib 12d at the lower surface of the front board 12a. The lower limit stopper 22 abuts against the rear portions of the hammer 16w and the hammer 16b when the key is pressed, and restricts the upward displacement of the rear ends of the hammer 16w and the hammer 16b, whereby the front ends of the white key 11w and the black key 11b. The downward displacement of the part is restricted. Further, an upper limit stopper 23 made of an impact absorbing material such as felt is fixed to the rear part of the frame FR. When the key is released, the lower end of the hammer 16w and the hammer 16b is restricted to contact the lower surface of the mass body 16w3 and the mass body 16b3, thereby controlling the lower end of the white key 11w and the black key 11b. Regulates upward displacement.

  In addition, a switch driving unit 24 is provided on the lower surface of the intermediate portion between the white key 11w and the black key 11b. The switch drive unit 24 is in contact with the upper surface of the switch SW disposed on the substrate 25. The switch SW is provided for each key, and is pressed along with the swing of each key to detect the pressed / released state of each key. The substrate 25 is provided with a through hole penetrating from the upper surface to the lower surface. The position of the through hole corresponds to the position of the boss 26 formed integrally on the upper surface of the front plate 12a. The board 25 is fixed to the key frame 12 by screwing the boss 26 through the through hole.

  A boss 27 is formed at the connecting portion between the rib 12 d and the rail portion 17. 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 through the through hole from below and screwing it into the boss 27.

  In addition, on the upper surface of the horizontal plate 12f, the hammer support portions 18w and the hammer support portions 18b are assembled at the positions corresponding to the respective hammer support portions 18w and the hammer support portions 18b as marks indicating the assembly positions of the hammers. The pitch name and key range number of the key corresponding to the hammer 16w and the hammer 16b are written. The pitch name and key range number of the horizontal plate 12f may be provided integrally with the horizontal plate 12f by resin molding, as with the base portion 16w1 and the base portion 16b1. Moreover, you may make it provide by printing and you may make it assemble | attach another component which described the note name and the key range number.

  In the keyboard device according to the present embodiment configured as described above, the positions of the swing centers of the hammer 16w and the hammer 16b and the positions of the abutting portion Pw1 and the abutting portion Pb1 are adjusted. Since the distance satisfies the above-mentioned predetermined relationship, the key resulting from the difference in the positional relationship between the key pressing position, the contact portion, the key swing center, and the hammer swing center between the white key 11w and the black key 11b. The difference in touch can be eliminated. That is, as shown in FIG. 7, the key touch can be lightened from the low key to the high key. And the identifier which identifies each hammer 16w and hammer 16b was provided. In addition, a sign indicating the position where the hammer is assembled is provided on the upper surface of the horizontal plate 12f behind the hammer support 18w and the hammer support 18b. According to this, in the keyboard device assembling process, the hammer support portion 18w and the hammer support portion 18b having the same pitch name and key range number as the pitch names and key range numbers written on the hammer 16w and the hammer 16b are applied to those hammers. Since 16w and the hammer 16b may be assembled, the operation can be easily performed. Therefore, the assemblability of the keyboard device can be improved. Further, the hammer 16w and the hammer 16b can be reliably assembled at correct positions.

  Furthermore, since the pitch name and the key range number are written on the upper surfaces of the base portion 16w1 and the base portion 16b, the pitch name and the key range number can be visually recognized even after the hammer 16w and the hammer 16b are assembled to the key frame 12. Although the difference in configuration between the hammers 16w adjacent to the hammer 16b is slight, since the hammers 16w themselves are not adjacent to each other, it is difficult to compare them after they are assembled to the key frame 12. That is, since it is impossible to bring them close and to overlap each other, it is difficult to make a visual comparison. However, if it is configured as described above, the hammer 16w and the key range number written on the hammer 16w and the hammer 16b are only compared with the pitch name and key range number written on the horizontal plate 12f. Since the assembly position of the hammer 16b in the key frame 12 can be inspected, the inspection efficiency can be improved.

  Further, after the white key 11w and the black key 11b are assembled to the key frame 12, the pitch name and the key range number written on the hammer 16w and the hammer 16b are located below the white key 11w and the black key 11b. It becomes invisible from the outside. Further, after the keyboard device is assembled to the electronic musical instrument main body, the horizontal portion 12f of the key frame 12 is located inside the electronic musical instrument main body, and thus cannot be visually recognized from the outside. Therefore, the pitch name and the key range number written on the hammer 16w, the hammer 16b, and the key frame 12 do not affect the aesthetics of the electronic musical instrument.

  Next, a keyboard apparatus according to a second embodiment of the present invention will be described. In the second embodiment, as shown in FIGS. 8 and 9, the mass body Mw and the mass body Mb are assembled to the front ends of the white key 11w and the black key 11b, respectively. As a result, the masses of the white key 11w and the black key 11b are gradually increased from the bass part to the treble part. Specifically, as shown in FIG. 10, in the characteristic curve diagram showing the relationship between pitch and key mass, the characteristic curve of the white key 11w and the characteristic curve of the black key 11b are parallel upward curves. The characteristic curve of the black key 11b is positioned above the characteristic curve of the white key 11w. Note that the masses of the white key 11w and the black key 11b may be gradually increased by gradually increasing the thickness of the upper wall and the side wall of the white key 11w and the black key 11b in order of pitch.

  In the present embodiment, the mass characteristics of the white key 11w and the black key 11b are set as described above. The positions of the swing centers of the hammer 16w and the hammer 16b and the masses of the mass body 16w3 and the mass body b3 are adjusted so as to be smaller than in the first embodiment. The configurations of the hammer 16w and the hammer 16b in the first embodiment may be the same for all the white keys 11w and the black keys 11b. In this case, the hammer 16w and the hammer 16b function only as means for urging the front ends of the white key 11w and the black key 11b upward, and are not involved in adjustment of the key touch. Further, instead of the hammer 16w and the hammer 16b, the front ends of the white key 11w and the black key 11b may be biased upward by a spring. In this case, in the characteristic curve diagram showing the relationship between the pitch and the biasing force to the key by the spring, the characteristic curve of the white key 11w and the characteristic curve of the black key 11b are parallel curves that are downwardly inclined to the black. The characteristic curve of the key 11b may be positioned below the characteristic curve of the white key 11w. Further, the urging force by the spring may be constant for all the keys.

  As described above, the masses of the white key 11w and the black key 11b are different for each assigned pitch. However, the difference in mass between the white keys 11w and the black keys 11b with which the assigned pitches are close is small. Therefore, the pitch name and the key range number assigned to each of the white key 11w and the black key 11b are written as identifiers for identifying the white key 11w and the black key 11b. As shown in FIG. 11, the pitch name and the key range number are written on the rear end portions of the top surfaces of the white key 11w and the black key 11b, respectively. In other words, in a state where the white key 11w and the black key 11b are assembled to the key frame 12, it is located behind the rear end of the visible portion of the black key 11b. The pitch name and the key range number may be provided integrally with the white key 11w and the black key 11b by resin molding. Note that the pitch name and the key range number may be provided by printing, or separate parts describing the pitch name and the key range number may be assembled. Other configurations are the same as those of the first embodiment.

  In the keyboard device configured as described above, the masses of the white key 11w and the black key 11b, and the inertia moments around the respective swing centers of the hammer 16w and the hammer 16b are adjusted, as in the first embodiment. The difference in key touch caused by the difference in the positional relationship between the key pressing position, the contact portion, the key swing center, and the hammer swing center between the key 11w and the black key 11b is eliminated. In the assembling work of the white key 11w and the black key 11b to the key frame 12, the position where the same pitch name and key range number as the pitch name and key range number written on the white key 11w and black key 11b are written In addition, it is easy to work because it is only necessary to assemble those keys. Therefore, the assemblability of the keyboard device can be improved. Also, since the pitch name and the key range number are written on the upper surface of the rear end of the white key 11w and the upper surface of the rear end of the black key 11b, the white key 11w and the black key 11b The pitch name and key range number can be visually recognized even after being assembled to the key frame 12. Accordingly, since the pitch name and key range number written on the white key 11w and the black key 11b can be inspected only by comparing the pitch name and key range number written on the horizontal plate 12f, the white key 11w and the black key 11b can be inspected. It is possible to improve the inspection efficiency of the assembly position on the key frame 12. Further, after the keyboard device is assembled to the electronic musical instrument main body, the rear end portions of the white key 11w and the black key 11b and the horizontal portion 12f of the key frame 12 are located in the electronic musical instrument main body, so that they can be visually recognized from the outside. Disappear. Therefore, the pitch name and the key range number written on the white key 11w, the black key 11b, and the key frame 12 do not affect the aesthetics of the electronic musical instrument.

  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.

  For example, in the first embodiment, the pitch name and the key range number are written on the upper surface of the horizontal plate 12f of the key frame 12 in order to indicate the assembly position of the hammer 16w and the hammer 16b. However, the part for indicating the pitch name and the key range number for indicating the assembly position of the hammer 16w and the hammer 16b is not limited to the horizontal plate 12f. That is, the pitch name and the key range number may be written at a position that can be seen from above at any stage before and after the hammer 16w and the hammer 16b are assembled to the hammer support 18w and the hammer support 18b. In this case, for example, the pitch name and the key range number may be written on a component extending in the left-right direction, a component provided in the left-right direction, or the like. Specifically, as shown in FIG. 12, the pitch name and the key range number may be written on the rear end (or front end) of the substrate 25. Further, as shown in FIG. 13, the pitch name and the key range number may be written on the upper surfaces of the key guide 19w and the key guide 21b. Further, as shown in FIG. 14, lower limit stoppers for restricting downward swing of the front end portions of the white key 11 w and the black key 11 b are respectively extended on the rail portion 19 and the rail portion 21. The note name and the key range number may be written on the upper surface of. Even if comprised in these, the effect similar to the said embodiment is acquired.

  In the first embodiment, the pitch name and the key range number are written on the hammer 16w, the hammer 16b, and the key frame 12, respectively, in order to improve the assemblability of the keyboard device and the inspection efficiency. On the other hand, also in the second embodiment, the pitch name and the key range number are written on the white key 11w, the black key 11b, and the key frame 12, respectively, in order to improve the assemblability of the keyboard device and the inspection efficiency. . However, the following marks may be provided instead of the pitch name and the key range number. In the following description, an example in which marks are provided on the white key 11w and the black key 11b is shown, but similar signs may be provided on the hammer 16w, the hammer 16b, and the key frame 12. Further, the mark provided on the hammer 16w and the hammer 16b and the type of the mark provided on the key frame 12 do not need to be the same, and may be any corresponding mark. That is, if the correspondence between the marks provided on the hammer 16w and the hammer 16b and the marks provided on the key frame 12 is clear, the types of the marks may be different. Further, the mark provided on the white key 11w and the black key 11b and the mark provided on the key frame 12 may not be the same. That is, if the correspondence between the marks provided on the white key 11w and the black key 11b and the marks provided on the key frame 12 is clear, the types of the marks may be different.

  For example, as shown in FIG. 15, a character or symbol having an order concept may be written for each key. In this case, for example, each of the 50 hiragana sounds (“A”, “I”, “U”, “E”, “O”,...) Is changed to a pitch name and a key range number (C1, C1 #, D1). , D1 #, E ...). Further, for example, a number corresponding to a pitch may be written. In this case, the types of characters or symbols provided in the white key 11w and the black key 11b may be distinguished.

  For example, as shown in FIG. 16, a different color mark may be provided for each key. In this case, for example, the density may be decreased (or increased) from the key of the bass part toward the key of the treble part. In this case, the color tone of the mark of the white key 11w may be distinguished from the color tone of the mark of the black key 11b.

  Further, for example, as shown in FIG. 17, marks with different dimensions in the front-rear direction and the lateral direction may be provided for each key. In this case, for example, the white key 11w has a rectangular width that has the same width in the horizontal direction and increases in length in the front-rear direction from the low-pitched white key 11w to the high-pitched white key 11w. The black key 11b may be provided with a rectangular mark having the same length in the front-rear direction and having a lateral width that decreases from the low-pitched black key 11b to the high-pitched black key 11b. . In this case, the white key 11w and the black key 11b need not be distinguished. For example, both the white key 11w and the black key 11b may be provided with rectangular marks having the same width in the horizontal direction and increasing the length in the front-rear direction as the assigned pitch increases. .

  Further, for example, as shown in FIG. 18, a different mark may be given for each key. In this case, for example, it is preferable to provide a mark obtained by rotating the direction of the arrow clockwise by a predetermined angle θ from the bass key to the treble key. In this case, a region where the direction of the arrow provided on the white key 11w changes and a region where the direction of the arrow provided on the black key 11b changes may be distinguished. For example, the direction of the arrow provided on the white key 11w is changed within a range of ± 90 ° centered on the back, and the direction of the arrow provided on the black key 11b is within a range of ± 90 ° centered on the front. It is good to change it with.

  Also, for example, as shown in FIG. 19, marks may be provided at different positions for each key. In this case, for example, the position where the circle is provided is gradually moved to the front end side of the white key 11w from the white key 11w of the bass part toward the white key 11w of the treble part, and the treble part is moved from the black key 11b of the bass part. The position where the circle is provided may be gradually moved from the left end to the right end of the black key 11b as it goes to the black key 11b. Further, in this case, it is not necessary to distinguish the positions where the marks on the white key 11w and the black key 11b are provided. For example, the position where the circle is provided may be gradually moved toward the front end of the key as the assigned pitch increases.

  Further, for example, a bar code, a QR code, or the like may be provided for each key, and a mark that can be read by a predetermined device such as a bar code reader or a QR code reader may be provided.

  Also by these marks, the key and the hammer can be identified, and the respective assembly positions on the key frame 12 can be specified, so that the same effect as in the above embodiment can be obtained.

11w ... White key, 11b ... Black key, 11w1, 11b1 ... Drive part, 12 ... Key frame, 13 ... Key support part, 16w, 16b ... Hammer, 16w1, 16b1 .... Base part, 16w2, 16b2 ... Connecting rod, 16w3, 16b3 ... Mass body, 18w, 18b ... Hammer support part, Pw1, Pb1 ... Contact part, FR ... Frame

Claims (9)

A plurality of different mass bodies,
In a keyboard device for an electronic musical instrument having a support member that supports the plurality of mass bodies,
An identifier for identifying the mass body is visible on a surface of the plurality of mass bodies and the plurality of mass bodies assembled to the support member, and the support member is attached to the electronic musical instrument. Provided in an area that is not visible when assembled,
A label corresponding to the identifier and indicating the assembly position of each mass body is visible on the surface of the support member and the plurality of mass bodies assembled to the support member, and A keyboard device for an electronic musical instrument, wherein the support member is provided in a region that is not visible when the electronic musical instrument is assembled to the electronic musical instrument. The keyboard device for an electronic musical instrument according to claim 1,
It has a plurality of keys that swing when each key is pressed and released,
The keyboard device for an electronic musical instrument, wherein the plurality of mass bodies are a plurality of hammers that swing in conjunction with the swing of the plurality of keys. The keyboard device for an electronic musical instrument according to claim 1,
The keyboard device for an electronic musical instrument, wherein the plurality of mass bodies are a plurality of keys that are rocked by pressing and releasing keys. The keyboard device for an electronic musical instrument according to any one of claims 1 to 3,
A keyboard device for an electronic musical instrument, characterized in that a mark including a character or symbol having an ordered concept is provided as the identifier. The keyboard device for an electronic musical instrument according to any one of claims 1 to 3,
A keyboard device for an electronic musical instrument, wherein a mark having a different color is provided for each mass body as the identifier. The keyboard device for an electronic musical instrument according to any one of claims 1 to 3,
A keyboard device for an electronic musical instrument, wherein the identifier is provided with a mark having a different dimension for each mass body. The keyboard device for an electronic musical instrument according to any one of claims 1 to 3,
A keyboard device for an electronic musical instrument, wherein the identifier is provided with a mark having a different orientation for each mass body. The keyboard device for an electronic musical instrument according to any one of claims 1 to 3,
A keyboard device for an electronic musical instrument, wherein the identifier is marked at a different position in the region for each mass body. The keyboard device for an electronic musical instrument according to any one of claims 1 to 3,
A keyboard device for an electronic musical instrument, wherein the identifier is provided with a mark that is encoded and readable by a predetermined device.