JP5817318B2 - 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, in order to simulate the key touch feeling (reaction force against the key operation) of an acoustic piano, the higher the assigned pitch, 2. Description of the Related Art A keyboard device for an electronic musical instrument having a light key touch at the front end is known. The keyboard device includes a plurality of hammers that respectively engage and swing with the keys and apply reaction forces against key pressing and releasing operations. Then, the length from the rocking center of the key provided at the rear end portion to the front end of the key is gradually increased from the bass portion key toward the treble portion key. Further, the distance from the rocking center of the key to the engagement position between the hammer and the key is the same for all the keys.

Japanese Patent No. 3074794

  As described above, if the length from the key swing center to the front end of the key is different for each key, it is necessary to manufacture a die for each key in order to integrally form the key by resin molding. Yes, costly.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a keyboard device in which the length from the rocking center of at least two keys having different assigned pitches to the front end of the key is different. The cost is to reduce. 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-mentioned object, the present invention is characterized by supporting a plurality of keys (11w, 11b) to which a pitch is assigned and which are rocked by pressing and releasing keys by the performer and a plurality of keys. A frame (12), and a key-side support (SK) provided on each of the plurality of keys and a frame-side support (SF) provided on each of the frames corresponding to the plurality of keys. In the keyboard device in which each of the engaging portions formed as described above is the center of swing of the plurality of keys, the key-side support portion includes a plurality of first support portions (sk1, sk2) provided at intervals in the front-rear direction. , Sk3, sk4), and the frame-side support portions respectively correspond to the plurality of first support portions, and have a plurality of second support portions (sf1, sf2, sf3, spaced apart in the front-rear direction). sf4), and the engaging portion is It is formed by engaging one first support portion among the plurality of first support portions and one second support portion corresponding to the one first support portion via an intermediate member (PN). There is in being. In this case, the key-side support portion may be composed of at least three first support portions arranged at equal intervals.

  If comprised as mentioned above, according to the kind of electronic musical instrument to apply, it respond | corresponds to one support part of the some 1st support parts, and one support part of the said some 1st support parts. A keyboard device having a key touch feeling characteristic according to the type of the electronic musical instrument by selecting one second support portion and engaging the selected set of support portions via an intermediate member Can be configured. In other words, it is possible to configure a keyboard device having different key touch feeling characteristics by changing the one set of support portions. In this way, keys and frames can be used in common in a plurality of types of keyboard devices having different key touch feeling characteristics. Therefore, the initial cost can be reduced for the plurality of types of keyboard devices as a whole. In addition, since the types of parts can be reduced, the management cost of parts can be reduced.

  Another feature of the present invention is that a pitch is represented by a pitch range and a pitch name, and among the plurality of keys, the pitch ranges of the assigned pitches are different and the pitch names are the same. The key-side support portion has the same longitudinal position.

  According to this, a plurality of keys having the same assigned pitch name are selected from the plurality of first support parts constituting the key side support part of each key by the first support parts having different positions in the front-rear direction. If supported, the distances from the center of key swing to the front end of the key can be made different while sharing the configuration of a plurality of keys having the same assigned pitch name. As described above, since a plurality of keys having the same assigned pitch name can be shared, a key belonging to a part of a range (for example, within one octave) is formed even in a keyboard device having a wide range. It is only necessary to install the equipment, and the initial cost can be reduced. In addition, since the types of parts can be reduced, the management cost of parts can be reduced.

  Another feature of the present invention is that, among a plurality of keys, the key-side support portions of keys having different pitch names and having different pitch names are assigned different positions in the front-rear direction. That is. According to this, the key touch feeling of each key can be finely adjusted by slightly changing the position of the rocking center of each key belonging to a predetermined sound range (for example, one octave).

  Another feature of the present invention is that a plurality of keys are each provided with an identifier representing a pitch name of the assigned pitch. Some keys have similar external shapes, even if assigned pitch names are different. In particular, the black keys have the same external shape even if their pitch names are different. Therefore, if the identifier is provided as described above, the pitch name assigned at first glance can be identified, so that the assemblability of the keyboard device can be improved.

  Another feature of the present invention is that the closer to the front end of the key, the greater the distance from the top surface of the key. The closer the first support portion and the second support portion to be engaged are to the front end of the key, the larger the swing range of the rear end of the key when the key is pressed and released. Therefore, if configured as described above, the rear end of the key does not rise to a very high position even when the support portions positioned on the front end side of the key are engaged with each other. Therefore, in the electronic musical instrument main body to which the keyboard device is applied, a large space for avoiding buffering with the rear end of the key is not required, so that the electronic musical instrument can be made smaller.

1 is an overall schematic diagram of a keyboard device according to an embodiment of the present invention. It is a right view about the white key of the middle part of the keyboard apparatus of FIG. It is a right view about the black key of the middle part of the keyboard apparatus of FIG. It is AA sectional drawing of FIG. It is a characteristic view which shows the characteristic of the mass of a mass body. It is a characteristic view which shows the characteristic of a key touch feeling. It is the whole keyboard apparatus which concerns on the modification of this invention. It is the whole keyboard apparatus which concerns on the other modification of this invention.

  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”. The pitch is expressed using the pitch name (C, C #, D... B) and the octave number (“3” to “6”).

  As shown in FIG. 1, the keyboard device has a plurality of white keys 11w and a plurality of black keys 11b. The entire sound range (C3 to C6) of the keyboard device is divided into three sound ranges, a low sound portion L (C3 to B3), a mid sound portion M (C4 to B4), and a high sound portion H (C5 to C6). . A pitch is assigned to each of the white key 11w and the black key 11b. Hereinafter, in the description of the white key 11w and the black key 11b, when it is necessary to specify the assigned pitch, the pitch is added to the code, the white key 11w (C3), the black key 11b (C # 3). ) ... Indicated as white key 11w (C6).

  The configuration of keys having the same pitch name but different octave numbers is common. For example, the white key 11w (C3), the white key 11w (C4), and the white key 11w (C5) have the same configuration. Further, for example, the configuration of the black key 11b (C # 3), the black key 11b (C # 4), and the black key 11b (C # 5) is common. Therefore, only the white key 11w and the black key 11b belonging to the middle sound part M will be described, and the description of the white key 11w and the black key 11b belonging to the low sound part L and the high sound part H will be omitted. Since the black key 11b is not arranged on the right side of the white key 11w (C6), the white key 11w (C6) has the white key 11w (C3), the white key 11w (C4), and the white key 11w (C5). However, the white key 11w (C3), the white key 11w (C4), and the white key 11w (C5) are common to the other parts.

  Next, the configuration of the white key 11w and the black key 11b belonging to the middle tone part M will be described. As shown in FIG. 2, the white key 11w is integrally formed by resin molding. The white key 11w 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. The white key 11w includes a front part and a rear part. The lateral width of the rear part is narrower than the lateral width of the front part. The rear part extends rearward from the rear end of the front part, and the connection position in the left-right direction between the rear part and the front part differs depending on the assigned pitch name. That is, the outer shape of the white key 11w differs depending on the assigned pitch name, but there is also a white key 11w whose outer shapes are similar to each other. Therefore, in order to identify the white key 11w for each assigned pitch name, an identifier representing the pitch name is provided at the rear end portion of the upper surface of the white key 11w. This identifier is provided integrally with the key body by resin molding. However, the identifier does not have to be provided integrally with the key body by resin molding, and the identifier may be engraved on the top surface of the key formed flat by resin molding, or a label printed with a pitch name is affixed May be. In the present embodiment, the white key 11w (C6) is also provided with an identifier. However, the white key 11w (C6) has a constant horizontal width from the front end to the rear end and is not confused with other keys. Therefore, the white key 11w (C6) does not have to be provided with an identifier. Good.

  As shown in FIG. 3, the black key 11b is also integrally formed by resin molding. 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. The width of the black key 11b in the left-right direction is constant from the front end to the rear end. The black key 11b is wider in the vertical direction than the white key 11w. Further, the width of the black key 11b in the left-right direction is larger than the width in the left-right direction of the front portion of the white key 11w. Thus, the black key 11b has the same external shape even if the assigned pitch names are different. Therefore, in order to identify the black key 11b for each assigned pitch name, an identifier representing the pitch name is provided at the rear end of the upper surface of the black key 11b. Like the identifier of the white key 11w, this identifier is provided integrally with the key body by resin molding. However, in this case as well, the identifier does not have to be provided integrally with the key body by resin molding, the identifier may be engraved on the upper surface of the key formed flat by resin molding, or the pitch name is printed. A label may be attached.

  A support portion SK is formed on the lower surface of the upper wall of the rear end portion of the white key 11w and the black key 11b. The support part SK includes four support plates sk1 to sk4 that are formed at equal intervals in the front-rear direction. The support plates sk1 to sk4 are arranged in this order from the rear end side of each key toward the front end side. The support plates sk1 to sk4 are formed in a thin plate shape in the left-right direction extending downward from the lower surface of the upper wall of each key. The upper walls of the rear ends of the white key 11w and the black key 11b are inclined so as to gradually become lower from the front end side toward the rear end side. Of the support plates sk1 to sk4, the length of the support plate located on the front end side of the key increases in the vertical direction. Through holes sk1a to sk4a are provided at the lower ends of the support plates sk1 to sk4. The heights of the through holes sk1a to the through holes sk4a are the same. As described above, since the upper wall of the rear end portion of the white key 11w and the black key 11b is inclined, the through hole located on the front end side of the key among the through holes sk1a to sk4a is the upper surface of the key. The distance from is getting bigger. The left and right side walls of the white key 11w are provided with through holes kw1 to kw4 having a common central axis with the through holes sk1a to sk4a. Further, on the left and right side walls of the black key 11b, there are provided through holes kb1 to kb4 having a common central axis with the through holes sk1a to sk4a. In a state where the white key 11w (C4), the black key 11b (C # 4),..., The white key 11w (B4) are arranged in the order of the assigned pitches, as the head goes from the bass key to the treble key, The support portion SK is set so as to gradually approach the front end of each key (see FIG. 1). Note that support plates sk1 to sk4 are provided at positions indicated by black dots in FIG. Further, the support plate sk1 of the white key 11w (B4) is located slightly behind the support plate sk2 of the white key 11w (C4). Of the support plates sk1 to sk4 of each key, one support plate corresponding to the sound range is engaged with a support portion SF provided on the key frame 12 described below.

  The key frame 12 is integrally formed by resin molding. 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. A support portion SF is provided for each key on the upper surface of the rear plate 12b. The support part SF includes four support bodies sf1 to sf4 formed at equal intervals in the front-rear direction. The supports sf1 to sf4 are formed so as to protrude upward from the upper surface of the rear plate 12b. The supports sf1 to sf4 are located below the support plates sk1 to sk4, respectively. That is, the support bodies sf1 to sf4 are provided at the positions indicated by black dots in FIG. Thus, the support part SF is also arranged so as to gradually approach the front end of the rear plate 12b as it goes from the low sound side to the high sound side, like the support part SK. Each of the support bodies sf1 to sf4 includes a pair of left and right plate-like portions formed in a plate shape. Through holes sf1a to sf4a are formed in the pair of left and right plate-like portions of the supports sf1 to sf4 so as to face each other. The distances from the upper surface of the rear plate 12b of the through holes sf1a to sf4a are the same. In the key release state of the white key 11w and the black key 11b (that is, the state where the key pressing depth is “0”), the positions of the through holes sf1a to sf4a in the vertical direction and the front-rear direction are the through holes sk1a. Thru | or the position of the up-down direction and the front-back direction of through-hole sk4a.

  In the middle sound portion M, as shown in FIG. 4, the positions of the through hole kw2, the through hole sf2a, and the through hole sk2a are aligned, and the pin PN is inserted into the through hole kw2, the through hole sf2a, and the through hole sk2a. . Accordingly, the white key 11w is supported so as to be rotatable around the pin PN, and the front end portion of the white key 11w can swing in the vertical direction. Further, as for the black key 11b of the middle sound part M, the pin PN is inserted into the through hole kb2, the through hole sf2a, and the through hole sk2a, similarly to the white key 11w. Thus, the black key 11b is supported so as to be rotatable around the pin PN, and the front end portion of the black key 11b can swing in the vertical direction. In the bass portion L, the pin PN is inserted into the through hole kw1, the through hole sf1a, and the through hole sk1a, and the white key 11w is swingably supported. The through hole kb1, the through hole sf1a, and the through hole sk1a The pin PN is inserted into the black key 11b, and the black key 11b is swingably supported. In the high sound portion H, the pin PN is inserted into the through hole kw3, the through hole sf3a, and the through hole sk3a, and the white key 11w is swingably supported. The through hole kb3, the through hole sf3a, and the through hole sk3a The pin PN is inserted into the black key 11b, and the black key 11b is swingably supported. The white key 11w (C6) belongs to the treble part H, but a pin PN is inserted into the through hole kw4, the through hole sf4a, and the through hole sk4a. Thereby, the white key 11w (C6) is supported so that rocking is possible. In addition, the support plate and support body in the position shown by the circle in FIG. 1 are engaged by the pin PN. Further, the position of the top surface of the white key 11w in the key release state is common to all the white keys 11w, and the position of the top surface of the black key 11b is common to all the black keys 11b.

  When each key swings, the support plate in front of the support plate engaged by the pin PN passes between a pair of opposing plate-like portions constituting the support corresponding to the support plates. . For example, when the key of the middle sound part M is swung, the support plate sk3 passes between a pair of plate-like portions constituting the support sf3, and the support plate sk4 is a pair of the support sf4. It passes between the plate-like parts.

  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, extend in the front-rear direction, and are provided at a predetermined interval in the left-right direction. Further, the rib 12d projects forward from the front end of the front plate 12a. Rail portions 17, 19, and 21 to be described later are provided on the protruding portion.

  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 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. Moreover, the rail part 17 is extended so that the lower end part of the adjacent rib 12d may be connected. 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 positions in the front-rear direction of the hammer support portion 18w and the hammer support portion 18b are common to all the hammers 16w and the hammers 16b.

  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. Then, the lengths of the connecting rod 16w2 and the connecting rod 16b2 are adjusted so that the rear ends of the mass body 16w3 and the mass body 16b3 described below are positioned slightly forward of the rear ends of the white key 11w and the black key 11b. Has been.

  As described above, the position of the fulcrum of the key differs depending on the assigned pitch. That is, the distance from the swing center of the white key 11w to the contact portion Pw1 with the drive portion 11w1 in the leg portion Fw2 varies depending on the pitch. Further, the distance from the swing center of the black key 11b to the contact portion Pb1 with the drive portion 11b1 in the leg portion Fb2 varies depending on the assigned pitch. Further, in the white key 11w, the pressing / release key operating position W0, which is the front end of the position where the key can be pressed / released, is located in front of the contact portion Pw1, whereas in the black key 11b, The key-release key operation position B0 that is the front end of the position where the key-release key operation is likely to occur (that is, the front end of the visible portion) is located behind the contact portion Pb1. Therefore, if the mass of the mass body 16w3 and the mass body 16b3 is the same for all the keys, the key touch feeling of the middle tone portion M rather than the bass portion L at the press / release key operation positions W0 and B0 according to the lever principle. Is heavy, and the key touch feeling of the high sound part H becomes heavier than the middle sound part M. In this case, the touch feeling of the white key 11w and the black key 11b in each sound range is not unified. That is, the key touch feeling of the black key 11b becomes heavier than the key touch feeling of the white key 11w. Therefore, as shown in FIG. 5, the mass of the mass body 16w3 and the mass body 16b3 is adjusted for each key, and as shown by a one-dot chain line in FIG. It gradually becomes lighter from low to high. Therefore, as shown by the broken lines in FIG. 6, the key touch feeling at the key release / operation key positions W1 and B1 located behind the key press / release key operation positions W0 and B0 by the distance d is gradually increased from the low tone to the high tone. It is lighter. However, as described above, since the length from the center of key swing to the front end of the key differs for each key, the key touch feeling at the pressing / releasing key operating positions W0, B0 and the pressing / releasing key operating positions W1, B1. The difference from the key touch feeling increases as the sound goes from low to high. That is, the difference in key touch feeling due to the difference in the front-rear direction of the pressing / releasing key operation position is small in the bass part L, medium in the middle part M, and large in the high part H.

  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 a 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.

  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 the keyboard device configured as described above, each key is provided with a support portion SK including the support plate sk1 to the support plate sk4, and the support body sf1 corresponding to the support plate sk1 to the support plate sk4 of each key is provided on the key frame 12. Thru | or the support part SF which consists of support body sf4 was provided. Then, among the support plates sk1 to sk4, one support plate corresponding to the sound range (that is, the octave number) and a support body corresponding to the one support plate are engaged using the pin PN. Each key was supported. With such a configuration, it is possible to configure a keyboard device having different key touch feeling characteristics by changing the combination of the supporting plate and the supporting body to be engaged according to the type of electronic musical instrument to be applied. Thus, since the white key 11w, the black key 11b, and the key frame 12 can be used in common in a plurality of types of keyboard devices, the initial cost can be reduced for the plurality of types of keyboard devices as a whole. In addition, since the types of parts can be reduced, the management cost of parts can be reduced.

  In addition, a common key structure has the same assigned pitch name but different octave numbers. Each key is supported by one support plate corresponding to the octave number among the support plates sk1 to sk4. As a result, the distance from the rocking center of each key to the front end is made different among a plurality of keys having the same assigned pitch name and different octave numbers. Therefore, it is only necessary to produce a mold for molding 12 types of keys belonging to the octave range, and the keys formed by these molds can be used in any of the low range L, mid range M, and high range H. It can also be used as a key. That is, when configured as described above, the initial cost can be reduced as compared with the case where a die is manufactured for each key having a different distance from the center of swing to the front end.

  Further, the support plates sk1 to sk4 are arranged at equal intervals. The support plate sk1 of the white key 11w (B) is positioned slightly behind the support plate sk2 of the white key 11w (C). Then, in a state where keys belonging to one octave range are arranged in the order of assigned pitch names, each support portion SK gradually approaches the front end of the key as it goes from the bass key to the treble key. did. The keys belonging to the bass part L, the middle tone part M, and the treble part H are supported by the support plate sk1, the support plate sk2, and the support plate sk3, respectively. As a result, the position of the center of swing gradually approaches the player side as it goes from the low sound side to the high sound side, and the touch feeling of the adjacent keys is slightly different, as shown in FIG. A keyboard device having a key touch feeling characteristic can be configured.

  In addition, identifiers representing the pitch names assigned to the white key 11w and the black key 11b are provided. Therefore, the workability of the work of assembling the white key 11w and the black key 11b to the key frame 12 can be improved.

  Further, the lower limit stopper 22 restricts the downward displacement of the front end portions of the white key 11w and the black key 11b by restricting the upward displacement of the rear end portions of the hammer 16w and the hammer 16b during key depression. That is, the maximum value of the key pressing depth of the white key 11w and the black key 11b is constant regardless of the sound range. The upper walls of the rear ends of the white key 11w and the black key 11b are inclined so as to become lower toward the rear end side, and the heights of the through holes sk1a to the through holes sk4a and the through holes sf1a to the through holes sf4a are increased. Were the same. Thereby, even when the support plate and the support body on the front end side of the key are engaged, when the key pressing depth is maximum, the rear end of the key does not rise to a very high position. Therefore, in the electronic musical instrument main body to which the keyboard device is applied, a large space for avoiding buffering with the rear end of the key is not required, so that the electronic musical instrument can be made smaller.

  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, as shown in FIG. 7, the fulcrum of the black key 11b may be located behind the fulcrum of the adjacent white key 11w. That is, the support plate sk2 of the white key 11w of the bass portion L and the support body sf2 are engaged by the pin PN, and the support plate sk1 of the black key 11b of the bass portion L and the support body sf1 are engaged by the pin PN. You may let them. Then, the support plate sk3 of the white key 11w of the middle sound portion M and the support body sf3 are engaged by the pin PN, and the support plate sk2 of the black key 11b of the middle sound portion M and the support body sf2 are engaged by the pin PN. What is necessary is just to engage. Further, the support plate sk4 of the white key 11w of the treble portion H and the support sf4 are engaged by the pin PN, and the support plate sf3 of the black key 11b of the treble portion H and the support sf3 are engaged by the pin PN. You can do it. In addition, the support plate and support body in the position shown by the circle in FIG. 7 are engaged by the pin PN.

  According to this, since the distance from the swing center to the front end of the key in the adjacent white key 11w and the black key 11b can be approximated, the difference in the touch feeling between the adjacent white key 11w and the black key 11b can be further increased. Can be small. In addition, it is possible to configure a keyboard device having different key touch feeling characteristics using the same white key 11w, black key 11b, and key frame 12 as in the above embodiment. That is, the configurations of the white key 11w and the black key 11b may be the same as those in the above-described embodiment, and a keyboard device having different key touch feeling characteristics can be configured simply by changing the key frame configuration, so that the key touch feeling characteristics are different. The cost can be reduced as a whole with a plurality of types of keyboard devices.

  In the above embodiment, the keys belonging to the bass part L, the middle part M, and the treble part H are changed from the bass key to the treble key in each range in which the keys are arranged in the assigned pitch order. The support part SK was made to approach the front end of each key as it went. Instead of this, the position in the front-rear direction of the key support portion SK belonging to each sound range may be the same. In this case, as shown in FIG. 8, the position in the front-rear direction of each support portion SF belonging to each sound range may be the same. Then, the key support plate sk1 and the support sf1 of the bass portion L are engaged by the pin PN, and the key support plate sk2 and the support sf2 of the genus key are engaged by the pin PN. The key support plate sk3 and the support body sf3 of the treble portion H may be engaged by the pin PN. In this case, the difference between the key touch feeling at the press and release key operation positions W0 and B0 and the key touch feeling at the press and release key operation positions W1 and B1 is the same in each sound range, and the low sound range side to the high sound range side The difference in the key touch feeling increases step by step as it goes to. Note that the positions of the support plate and the support at the positions indicated by circles in FIG. 8 are engaged by the pins PN.

  Then, using the key and key frame of the keyboard apparatus of FIG. 8, the position of the support plate and the support in the front-rear direction engaged by the pin PN may be the same for all the keys. For example, the support plate sk1 and the support body sf1 of each key may be engaged regardless of the sound range. In this case, the difference between the key touch feeling at the press / release key operation positions W0, B0 and the key touch feeling at the press / release key operation positions W1, B1 is the same for all keys.

  If comprised as mentioned above, since the black key 11b is a common structure irrespective of the assigned pitch name, it is not necessary to provide an identifier for the black key 11b. That is, the structure of the mold can be simplified, and the process for marking the identifier and the label printed with the identifier are not required, so that the cost can be further reduced. In addition, the part management cost can be further reduced.

  Moreover, in the said embodiment and its modification, it inclined so that the upper wall of the rear-end part of the white key 11w and the black key 11b might become low as it goes to a rear-end side. However, if there is enough space in the electronic musical instrument, it is not necessary to incline the upper wall of the rear end, and the upper wall of the front part of the rear end is flush with the upper wall of the rear end. It may be located above.

  Moreover, although the sound range of the keyboard device in the above embodiment and its modification is 3 octaves, it may be a keyboard device with a wider sound range, or conversely, a keyboard device with a narrower sound range. Moreover, in the said embodiment, although the support part SK was comprised from the support plate sk1 thru | or the support plate sk4, the number of the support plates which comprise the support part SK is not restricted to four, What is necessary is just two or more. And the number of support body SF which comprises support part SF is not restricted to four, What is necessary is just two or more. Further, when three or more support plates constituting the support portion SK are provided, it is not necessary to arrange the support plates at equal intervals, and the intervals between the support plates are matched to the characteristics of the desired key touch feeling. May be different. And according to arrangement | positioning of the support plate which comprises the support part SK, you may vary the space | interval of each support body.

  Moreover, in the said embodiment and its modification, support part SK was comprised from the support plate sk1 thru | or support plate sk4. However, the support plates sk1 to sk4 need not be provided. In this case, the support part SK of the white key 11w is configured from the through holes kw1 to the through hole kw4, and the support part SK of the black key is configured from the through holes kb1 to the through hole kb4. Then, the distance between the pair of left and right plate-like portions constituting the support bodies sf1 to sf4 is made larger than that in the above embodiment, and the outer side surfaces of the left and right plate-like portions abut against the inner surface of the side wall of the key. What should I do? The positions of the through holes sf1a to sf4a are the same as in the above embodiment. And like the said embodiment, what is necessary is just to engage the support part SK and support part SF using the pin PN. According to this, since the structure of the metal mold | die for shape | molding the white key 11w and the black key 11b can be simplified more, initial cost can further be reduced.

  Moreover, in the said embodiment and its modification, the front end side of the white key 11w and the black key 11b was urged | biased upwards with the hammer 16w and the hammer 16b, respectively. However, 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, the spring constant and the biasing force of the spring in the key release state may be adjusted for each key.

  Further, in the above-described embodiment and its modifications, the key touch feeling at the front end of the key is reduced in order of the pitch only in a part of the sound range, and the key touch feeling at the front end of the key is the same in the other sound ranges. Also good.

11w ... White key, 11b ... Black key, 12 ... Key frame, SK, SF ... Support part, sk1, sk2, sk3, sk4 ... Support plate, sf1, sf2, sf3, sf4 ... Support, PN ... Pin, FR ... Frame

Claims (6)

A plurality of keys that are assigned pitches and swing by being pressed and released by the performer,
A frame for supporting the plurality of keys,
Each engagement portion formed by engaging a key side support portion provided for each of the plurality of keys and a frame side support portion provided for each of the frames corresponding to the plurality of keys, In the keyboard device having the swing center of the plurality of keys,
The key side support part is composed of a plurality of first support parts provided at intervals in the front-rear direction,
The frame side support portion corresponds to each of the plurality of first support portions, and includes a plurality of second support portions provided at intervals in the front-rear direction.
The engagement portion engages one first support portion of the plurality of first support portions and one second support portion corresponding to the one first support portion via an intermediate member. A keyboard device characterized by being formed. The keyboard device according to claim 1,
The pitch is represented by a range and a pitch name,
A keyboard device characterized in that, among the plurality of keys, the keys in the front-rear direction of the key-side support portions of the keys having different pitch ranges and having the same pitch name are made the same. . The keyboard apparatus according to claim 2,
A keyboard device characterized in that, among the plurality of keys, keys in which the assigned pitch ranges are the same and keys having different pitch names have different positions in the front-rear direction of the key-side support portions. . The keyboard device according to claim 3,
A keyboard device, wherein the plurality of keys are each provided with an identifier representing a pitch name of the assigned pitch. The keyboard device according to any one of claims 1 to 4,
The keyboard device characterized in that the closer to the engagement portion closer to the front end of the key, the greater the distance from the upper surface of the key. The keyboard device according to any one of claims 1 to 5,
The keyboard device according to claim 1, wherein the key side support portion includes at least three first support portions arranged at equal intervals.

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