JP2013041084A - Keyboard device of electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of a keyboard device in which each of at least two keys to which different pitches are respectively allocated has a length from its swing center to its front end different from that of the other key.SOLUTION: A key frame 12 having a plurality of support members sf for supporting white keys 11w and black keys is provided. The position of each support member sf in the front and rear direction is set in advance according to a pitch allocated to the white key 11w and the black key supported by the support member. Key base materials are formed by resin molding. The key base materials are members commonly used to form a plurality of white keys 11w and black keys to which different pitches are allocated respectively. The white keys 11w and black keys are formed by processing the rear end parts of the key base materials and adding engaging parts for engaging with the support members sf. The formed white keys 11w and black keys are engaged with the support members sf, respectively.

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 object, the present invention is characterized in that a plurality of keys (11w, 11b), each of which is assigned a pitch and oscillated by being pressed and released by the performer, are engaged. In the keyboard device including a plurality of support members (sf, ef, sg, eg) that respectively support a plurality of keys and a frame (12, 12A) that supports the plurality of support members, A key base material formed by resin molding, wherein the position in the front-rear direction is set according to the pitch assigned to each supporting key, and is a key base common to at least two keys of the plurality of keys Engagement portions (sk, ek, ct, ej) that engage with the support member at positions corresponding to the pitches respectively assigned to the at least two keys at the rear end of the material (11W, 11B). Add at least the above One of the lies in the formation of the key. In this case, the engagement portion (sk, ct) may be formed by removing a part of the rear end portion of the key base material. Moreover, in this case, the engaging member (ek, ej) that engages with the support member may be assembled to the rear end portion of the key base material to form the engaging portion.

  If comprised as mentioned above, the keyboard apparatus from which the characteristic of a key touch feeling differs can be comprised by changing the position which provides an engaging part according to the kind of electronic musical instrument. Thus, since the key base material can be used in common for a plurality of types of keyboard devices, the initial cost can be reduced as a whole for the plurality of types of keyboard devices. In addition, since the types of parts can be reduced, the management cost of parts can be reduced.

  The key base material is commonly used to form keys having the same assigned pitch names and different octave numbers. Therefore, it suffices to manufacture a mold for molding 12 types of keys belonging to one octave sound range, and the keys molded by these molds can be used to form keys having different octave numbers. 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.

  Another feature of the present invention is that the key base material is provided with a first uneven portion in which uneven portions of the same shape are repeatedly formed in the front-rear direction, and the engaging member is fitted to the first uneven portion (UK). There is. According to this, the position of the engagement member can be prevented from being displaced, and the position of the swing center of each key in the front-rear direction can be accurately set.

  Another feature of the present invention resides in that the concave and convex portions are shifted in the front-rear direction so that the positions of the concave and convex portions constituting the first concave and convex portions of two adjacent keys do not coincide with each other. According to this, in the two adjacent keys, the position of the engaging member can be shifted by a distance smaller than the pitch of the unevenness. That is, the distance from the swing center to the tip of the key can be adjusted more delicately.

  Another feature of the present invention is that support members (ef1, ef2, ef3) for supporting keys belonging to a predetermined sound range have the same longitudinal position, and support for supporting keys belonging to the predetermined sound range, respectively. The engaging portions of the members and the engaging members (sk1, sk2, sk3) are shifted in the front-rear direction. This also makes it possible to finely adjust the distance from the swing center to the tip of the key.

  Another feature of the present invention is that the engaging members to be assembled to the keys belonging to the predetermined sound range are different types of members whose engaging portions with the support member are displaced in the front-rear direction. The identifier for identifying the type of member is provided on the engaging member. According to this, even if the difference between the engagement members is slight, the engagement members can be identified for each type at a glance, so that the assemblability of the keyboard device can be improved.

  Another feature of the present invention resides in that the support member is assembled to the frame. According to this, the frame can be commonly used in a plurality of types of keyboard devices. This also makes it possible to reduce the initial cost for a 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 the frame is provided with a second concavo-convex portion in which concavo-convex portions having the same shape are repeatedly formed in the front-rear direction, and the support member is fitted to the second concavo-convex portion. According to this, the position shift of the support member can be prevented, and the position in the front-rear direction of the swing center of each key can be set accurately.

  Another feature of the present invention is that the concave and convex portions are arranged so that the positions of the concave and convex portions constituting the two adjacent second concave and convex portions that respectively assemble the supporting members that support the two adjacent keys are not aligned. This is because of shifting in the front-rear direction. According to this, in the two adjacent keys, the position of the support member can be shifted by a distance smaller than the uneven pitch. That is, the distance from the swing center to the tip of the key can be adjusted more delicately.

  Another feature of the present invention resides in that an identifier representing a pitch assigned to a plurality of keys is provided for each of the plurality of keys. 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.

1 is an overall schematic diagram of a keyboard device according to a first embodiment of the present invention. It is an enlarged view of the rear-end part of the keyboard apparatus of FIG. It is a right view about the white key of the keyboard apparatus of FIG. It is a right view about the black key 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 an enlarged view of the rear-end part of the keyboard apparatus which concerns on 2nd Embodiment of this invention. It is a right view about the white key of the keyboard apparatus of FIG. It is a right view about the black key of the keyboard apparatus of FIG. It is AA sectional drawing of FIG. 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. It is an enlarged side view of the rear-end part of the key which concerns on the modification of 1st Embodiment of this invention. It is AA sectional drawing of FIG. 14A. It is an enlarged side view of the rear-end part of the key which concerns on the modification of 2nd Embodiment of this invention. It is AA sectional drawing of FIG. 15A. It is an enlarged view of the uneven part of the key concerning the modification of a 2nd embodiment of the present invention. It is the schematic which shows the example which assembled | attached the 1st engagement member and the 1st support member. It is a side view of the 1st engagement member and the 1st support member. It is the schematic which shows the example which assembled | attached the 2nd engagement member and the 2nd support member. It is a side view of the 2nd engagement member and the 2nd support member. It is the schematic which shows the example which assembled | attached the 3rd engagement member and the 3rd support member. It is a side view of a 3rd engagement member and a 3rd support member.

(First embodiment)
Hereinafter, a first 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 FIGS. 1 to 5, the keyboard apparatus has a plurality of white keys 11w and a plurality of black keys 11b. 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 white key 11w is a key base material 11W (C) to a key base material 11W formed integrally by resin molding for each pitch name of the white key (that is, C, D, E, F, G, A, and B). (B) It is formed by processing the rear end portion. Each of the key base material 11W (C) to the key base material 11W (B) includes a front portion and a rear portion. 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 key base material 11W is different for each assigned pitch name. The configuration of the rear part is common to the key base material 11W (C) to the key base material 11 (B). Therefore, hereinafter, the key base material 11W (C) to the key base material 11W (B) will be described as the key base material 11W. However, when it is necessary to specify the assigned pitch name, the pitch name is attached to the reference numeral for explanation.

  The rear portion of the key base 11W has a flat horizontal portion H formed in a position parallel to the upper surface of the front portion and lower than the upper surface of the front portion. Side wall portions S extending vertically from the left and right ends of the horizontal portion H are formed. That is, the shape of the cross section perpendicular to the longitudinal direction of the key base material 11W at the rear portion of the key base material 11W is the same regardless of the position in the front-rear direction. The white key 11w is formed by processing the horizontal portion H of the key base material 11W and providing a through hole sk penetrating vertically.

  Similarly to the white key 11w, the black key 11b is formed by processing the rear end portion of the key base material 11B integrally formed by resin molding. The key base material 11B is common to all the black keys 11b. Each of the key base materials 11B includes a front portion and a rear portion. The lateral width of the rear part is the same as the lateral width of the front part. The rear portion of the key base material 11B has a flat horizontal portion formed at a position parallel to the upper surface of the front portion and lower than the upper surface of the front portion. Side wall portions extending vertically from the left and right ends of the horizontal portion are formed. That is, the shape of the cross section perpendicular to the longitudinal direction of the key base material 11B at the rear portion of the key base material 11B is the same regardless of the position in the front-rear direction. The black key 11b is formed by processing a horizontal portion of the key base material 11B and providing a through hole sk penetrating vertically. The position in the front-rear direction of the through hole sk is determined in advance by the pitches assigned to the white key 11w and the black key 11b to be formed. In the present embodiment, the position of the through-hole sk is set so as to gradually approach the front end side of the key as it goes from the bass key to the treble key.

  Next, the configuration of other parts of the white key 11w and the black key 11b formed as described above will be described. The front part of the white key 11w (that is, the front part of the key base 11W) 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. It is formed in a hollow shape opened downward. As described above, 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. Further, the position of the through hole sk varies depending on the assigned pitch. Therefore, in order to identify the white key 11w for each assigned pitch, an identifier representing the pitch is provided at the rear end portion of the upper surface of the white key 11w. Specifically, a label printed with a pitch is attached to the upper surface of the rear end of the key. An identifier may be stamped on the upper surface of the key. The identifier may be a simple figure or color corresponding to the pitch. 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.

  The front part of the black key 11b (that is, the front part of the key base material 11B) also 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. It is formed in a hollow shape opened downward. As described above, the black keys 11b have the same outer shape even if assigned pitch names are different. Further, the position of the through hole sk varies depending on the assigned pitch. Therefore, in order to identify the black key 11b for each assigned pitch name, an identifier representing the pitch is provided at the rear end of the upper surface of the black key 11b. That is, as with the identifier of the white key 11w, a label printed with a pitch is attached. In this case, however, the identifier may be stamped on the upper surface of the key. The identifier may be a simple figure or color corresponding to the pitch.

  And the upper end part of the support body sf provided in the key frame 12 demonstrated below is inserted in the through-hole sk, and the white key 11w and the black key 11b are supported.

  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 sf corresponding to each key is provided on the upper surface of the rear plate 12b. The support body sf is formed so as to protrude upward from the upper surface of the rear plate 12b. The support sf may be provided integrally with the key frame 12, or may be configured as a separate part from the key frame 12, and may be assembled to the key frame 12 by adhesion, welding, or the like. Good. Since the support body sf corresponds to the through hole sk, the support body sf is disposed 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. In addition, the support body sf is provided in the position shown by the black dot in FIG. That is, the rocking center of the key is provided at the position indicated by the black dot.

  The support sf includes a base portion sf1 that is formed in a columnar shape and supported by the rear plate 12b, and a columnar pin sf2 that extends upward from the upper end of the base portion sf1. The diameter of the pin sf2 is slightly smaller than the diameter of the through hole sk. Further, the upper end of the base portion sf1 is formed in a curved surface that is convex upward.

  The white key 11w and the black key 11b are placed on the key frame 12 so that the pin sf2 passes through the through hole sk. Thereby, the white key 11w and the black key 11b are supported by the support body sf, and the front ends of the white key 11w and the black key 11b 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, 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. Accordingly, if the masses of the mass body 16w3 and the mass body 16b3 are the same for all the keys, the key touch feeling of the middle tone part is heavier than the bass part at the press / release key operation positions W0 and B0 by the lever principle. In addition, the key touch feeling in the high sound part becomes heavier than in the middle sound part. 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. 6, 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. 7, the key touch feeling at the key release positions W1 and B1, which are located behind the key release positions W0 and B0 by the distance d, gradually increases from low to high. 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.

  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 according to the first embodiment, the through holes sk are provided at positions corresponding to the pitches assigned to the keys to be formed, at the rear ends of the key base material 11W and the key base material 11B. I made it. By configuring in this way, it is possible to configure a keyboard apparatus having different key touch feeling characteristics by varying the positions where the through holes sk are provided according to the type of electronic musical instrument to be applied. Specific examples will be described later. Thus, since the key base material 11W and the key base material 11B can be used in common in a plurality of types of keyboard devices, the initial cost can be reduced as a whole of the plurality of types of keyboard devices. In addition, since the types of parts can be reduced, the management cost of parts can be reduced.

  The key base material 11W is commonly used to form the white key 11w having the same assigned pitch name and different octave numbers. The key base material 11B is commonly used for forming all the black keys 11b. Accordingly, there are seven types of key base materials 11W, one type of key base material 11B, and a mold for molding a total of eight types of key base materials may be manufactured. The material can be used to form keys with different octave numbers. 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, if the support body sf is configured as a component different from the key frame 12, the key frame 12 can be commonly used in a plurality of types of keyboard devices. This also makes it possible to reduce initial costs 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, identifiers representing pitches 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.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. As shown in FIGS. 8 to 10, the white key 11w and the white key 11b according to the second embodiment are formed by assembling the engaging member ek to the key base material 31W and the key base material 31B. The front portions of the key base material 31W and the key base material 31B have the same configuration as the front portions of the key base material 11W and the key base material 11B. Unlike the rear portions of the key base material 11W and the key base material 11B, the rear portions of the key base material 31W and the key base material 31B extend downward from the left and right ends of the thin upper wall and the upper wall that extend in the front-rear direction. It has a thin-walled side wall and is formed in a hollow shape that opens downward. The rear upper wall of the key base 31W is continuous with the front upper wall. The vertical position of the upper wall of the rear portion of the key base 31B coincides with the lower end of the apparent portion as the black key 11b. At the upper ends of the inner side surfaces of the left and right side walls at the rear of the key base material 11W and the key base material 11B, there are uneven portions UK in which unevenness having a triangular cross-sectional shape in the horizontal direction is repeatedly arranged at a constant pitch in the front-rear direction. Is provided. The positions of the concave and convex portions and the convex portions in the front-rear direction that form the left and right uneven portions UK and the right uneven portion UK of each key base material are the same. Further, in the adjacent keys, the concave and convex portions constituting the concave and convex portion UK and the positions of the convex portions in the front-rear direction are the same. In the present embodiment, the cross-sectional shape in the horizontal direction of the unevenness constituting the uneven portion UK is a triangle, but the cross-sectional shape is not limited to a triangle, and may be, for example, a trapezoid or a rectangle.

  As shown in FIG. 11, the engaging member ek is a rectangular parallelepiped body portion eka, and a protruding portion ekb that protrudes outward from the front end portion and the rear end portion of the left and right side surfaces of the body portion eka and extends vertically. And a plate-like engaging portion ekc extending downward from the lower surface of the main body portion eka. The engaging portion ekc is provided with a through hole ekc1 penetrating left and right. And the engaging member ek is assembled | attached to a key base material by fitting the protrusion part ekb to the recessed part of the uneven | corrugated | grooved part UK, and adhere | attaching it. The position in the front-rear direction for assembling the engaging member ek is determined in advance by the pitches assigned to the white key 11w and the black key 11b to be formed. In the present embodiment, as in the first embodiment, the position where the engagement member ek is assembled so that the engagement member ek gradually approaches the front end side of the key as it goes from the bass key to the treble key. Is set.

  Then, the engaging portion ekc of the engaging member ek is engaged with the engaging member ef provided on the key frame 12A, and the white key 11w and the black key 11b are supported.

  The key frame 12A is configured in substantially the same manner as the key frame 12. The key frame 12A is provided with an uneven portion UF corresponding to each key on the upper surface of the rear plate 12b instead of the support portion sf of the key frame 12. The uneven portion UF has the same configuration as the uneven portion UK provided on the key base material. That is, the positions in the front-rear direction of the concave portions and the convex portions constituting the two adjacent concave and convex portions UF are the same. Furthermore, the concave and convex portions that respectively form the concave and convex portion UK and the concave and convex portion UF and the positions in the front-rear direction of the convex portions are the same.

  The engaging member ef includes a rectangular parallelepiped main body part efa, a projecting part efb projecting outward from the front and rear end parts of the left and right side surfaces of the main body part efa, and extending vertically, and an upper surface of the main body part efa And an engaging portion efc consisting of a pair of left and right plate-like portions extending upward. Protruding portions efc1 are provided on the inner side surfaces of the plate-like portions constituting the engaging portions efc so as to face each other. And the engaging member ef is assembled | attached to 12 A of key frames by making the protrusion part efb fit and adhere to the recessed part of the uneven | corrugated | grooved part UF. The engaging member ef is assembled at a position determined in advance by the pitch assigned to the corresponding key so as to engage with the engaging member ek. That is, in the present embodiment, the position where the engagement member ef is assembled is set so that the engagement member ef gradually approaches the front end side of the key as it goes from the bass key to the treble key.

  The white key 11w and the black key 11b are supported by the engaging member ef by fitting the protruding portion efc1 of the engaging portion efc into the through hole ekc1 of the engaging portion ekc, and the white key 11w and the black key 11b The front end can swing in the vertical direction. Other configurations are the same as those of the first embodiment.

  The keyboard device according to the second embodiment can achieve the same effects as those of the first embodiment. Furthermore, in the keyboard device according to the second embodiment, the engaging member ek and the engaging member ef are fitted to the concave and convex portion UK and the concave and convex portion UF. It is possible to accurately set the position in the front-rear direction of the center of rocking of each key while preventing positional deviation.

  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 and the second embodiment, the key swing center gradually approaches the front end side of the key as it goes from the bass key toward the treble key. However, the position of the key swing center can be changed according to the key touch characteristics of the target keyboard device. That is, for example, as shown in FIG. 12, the swing center of the black key 11b may be positioned behind the swing center of the adjacent white key 11w. Specifically, in the adjacent white key 11w and black key 11b, the distance from the center of swing to the front end of each key may be made substantially equal. In this case, in the keyboard device of the first embodiment, the through hole sk and the support sf of the black key 11b may be provided behind the through hole sk and the support sf of the adjacent white key 11w. Further, in the keyboard device of the second embodiment, the engaging member ek is placed on the concave and convex portion UK so that the engaging member ek of the black key 11b is positioned behind the engaging member ek of the adjacent white key 11w. Assembling and disengaging the engaging member ef so that the engaging member ef of the black key 11b is positioned behind the engaging member ef of the adjacent white key 11w so as to correspond to the engaging member ek, respectively. What is necessary is just to assemble each to UF. In FIG. 12, the position of the center of rocking of the key is indicated by a black dot.

  According to this, since the distance from the rocking center to the front end of the key in the adjacent white key 11w and the black key 11b is approximated, the difference in touch feeling between the adjacent white key 11w and the black key 11b can be further reduced. .

  Further, for example, as shown in FIG. 13, the entire sound range (C3 to C6) of this keyboard device is divided into a bass part L (C3 to B3), a midsound part M (C4 to B4), and a treble part H (C5 to C5). C6) may be divided into three sound ranges, and the front and rear positions of the rocking centers of the keys belonging to the divided sound ranges may be the same. Specifically, in the first embodiment, the positions in the front-rear direction of the through holes sk provided in the key base material for forming the keys belonging to the respective sound ranges are made the same, and the respective supports sf belonging to the respective sound ranges. The position in the front-rear direction may be the same. In the second embodiment, each engagement member ek is assembled to the concave-convex portion UK so that the position of the engagement member ek in the front-rear direction is the same as the key base material for forming a key belonging to each sound range. Each engagement member ef may be assembled to the concavo-convex portion UF so that the front and rear directions of the engagement member ef that supports the keys belonging to each sound range are the same. 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. Also in FIG. 13, the position of the center of rocking of the key is indicated by a black dot.

  Further, the position in the front-rear direction of the swing center of each key may be the same for all keys. 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.

  Moreover, in 1st Embodiment, the through-hole sk penetrated up and down was provided in the horizontal part H provided in the rear part of the key base material 11W and the key base material 11B. Instead, as shown in FIGS. 14A and 14B, as in the second embodiment, the thin base and upper walls of the key base material 11 </ b> W and the key base material 11 </ b> B are extended in the front-rear direction. It is also possible to have thin side walls extending downward from the left and right ends of each of them, to form a hollow shape that opens downward, and to cut out the left and right side walls to provide a notch ct. The notch ct extends upward from the lower ends of the left and right side walls to the middle part of the side walls. Further, the notch ct has a narrow width in the front-rear direction. The notches ct formed on the left and right side walls are opposed to each other. In this case, a support sg is used instead of the support sf. The support sg has a base portion sg1 supported by the rear plate 12b of the key frame 12, and a pair of left and right plate-like portions sg2 extending upward from the left and right end portions of the upper end of the base portion sg1, The pair of left and right plate-like portions sg2 are provided with through holes sg2a so as to face each other. A pin sg3 is inserted into the through hole sg2a. The pin sg3 is longer than the distance between the pair of left and right plate-like portions sg2, and both end portions of the pin sg3 protrude outward from the pair of left and right plate-like portions sg2. Then, the both ends of the pin sg3 may be fitted into the notch ct so that the key is supported to be swingable. Also by this, the same effect as the first embodiment can be obtained.

  Further, as shown in FIGS. 15A and 15B, an engaging member ej may be used instead of the engaging member ek in the second embodiment. The engaging member ej is formed in a columnar shape, and is inserted into and supported by through holes provided so as to face the left and right side walls of the key base material 11W and the key base material 11B. In this case, an engaging member eg is used instead of the engaging member ef. The engaging member eg has a base part eg1 supported by the rear plate 12b of the key frame 12, and a pair of left and right plate-like parts eg2 extending upward from the left and right end parts of the upper end of the base part eg1. ing. Cutout portions eg2a are provided at the upper ends of the pair of left and right plate-like portions eg2. The notch part eg2a is extended from the upper end of the plate-like part eg2 downward to the middle part of the plate-like part eg2. The width in the front-rear direction of the notch part eg2a is slightly wider than the diameter of the engaging member ej. Further, the notch portions eg2a formed in the pair of left and right plate-like portions eg2 are opposed to each other. Then, by engaging the engaging member ej with the notch eg2a, the key is supported to be swingable. Also by this, the same effect as the above embodiment can be obtained.

  Moreover, in the said 2nd Embodiment, the position of the front-back direction of the recessed parts and convex parts which comprise each uneven | corrugated | grooved part was made the same in all the uneven | corrugated | grooved part UK and the uneven | corrugated | grooved part UF. However, as shown in FIG. 16, the positions of the concave and convex portions UK and the concave and convex portions UF of adjacent keys may be shifted. According to this, in the adjacent keys, the positions of the engaging member ek and the engaging member ef in the front-rear direction can be shifted by a distance φ smaller than the uneven pitch pt. That is, the distance from the swing center to the tip of the key can be adjusted more delicately. In the example shown in FIG. 16, the concave and convex portions of one key and the concave and convex portions of the other key coincide with each other. However, the amount of deviation of the concave and convex portions is not limited to this. However, the deviation may be smaller or larger.

  In the second embodiment, the engagement member ek and the engagement member ef are common to all the keys. However, a plurality of types of engaging members in which the positions of the engaging portions are different in the front-rear direction may be used. For example, as shown in FIGS. 17A to 19B, a first engagement member ek1 to a third engagement member ek3, and a first engagement member ef1 to a first engagement member ef3 may be used. The configurations of the main body portions of the first engaging member ek1 to the first engaging member ek3 are the same as the main body portion eka of the engaging member ek of the second embodiment. And the engaging part ek1a of the 1st engaging member ek1 is located slightly ahead rather than the center of the lower surface of the main-body part of the 1st engaging member ek1. The engaging part ek2a of the second engaging member ek2 is located at the center of the lower surface of the main body part of the second engaging member ek2. Further, the engagement portion ek3a of the third engagement member ek3 is located slightly behind the center of the lower surface of the main body portion of the third engagement member ek3. The displacement of the first engagement member ek1 and the third engagement member ek3 from the center of the lower surface of the main body is smaller than the pitch pt of the unevenness constituting the uneven portion UK and the uneven portion UF.

  The positions of the engaging portions of the first engaging member ef1 to the third engaging member ef3 are set so as to correspond to the engaging portions of the first engaging member ek1 to the third engaging member ek3. . That is, the engaging portion ef1a of the first engaging member ef1 is positioned slightly forward from the center of the upper surface of the main body portion of the first engaging member ef1. The engaging portion ef2a of the second engaging member ef2 is located at the center of the upper surface of the main body portion of the second engaging member ef2. Further, the engagement portion ef3a of the third engagement member ek3 is located slightly behind the center of the upper surface of the main body portion of the third engagement member ef3. The displacement of the first engaging member ef1 and the third engaging member ef3 from the center of the upper surface of the main body is smaller than the pitch pt of the unevenness that forms the uneven portion UK and the uneven portion UF.

  The first engaging member ek1 to the third engaging member ek3 and the first engaging member ef1 to the third engaging member ef3 configured as described above are set to have the same position in the front-rear direction of the main body. Thus, the three keys with consecutive pitches are assembled to the concave and convex portions UK and UF, respectively. For example, it is assembled to a portion located forward by a distance δ from the rear end of each uneven portion. Thereby, the front-rear direction shift of the position of the center of rocking of the three keys can be made smaller than the pitch pt of the unevenness constituting the unevenness portion UK and the unevenness portion UF. That is, the distance from the swing center to the tip of the key can be adjusted more delicately. In this case, since the difference between the first engagement member ek1 to the third engagement member ek3 and the first engagement member ef1 to the third engagement member ef3 is slight, an identifier for identifying each may be provided. Note that the number of types of engagement members may be two, or four or more.

  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 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.

  Moreover, in the said embodiment and its modification, although the key touch feeling of the front end of a key was gradually lightened as it went to the high sound part H from the low sound part L, it does not necessarily need to be comprised in this way and in each sound range. The key touch feeling at the front end of the key may be the same, and the key touch feeling may be gradually reduced for each sound range as it goes to the high sound range. Further, the key touch feeling may be lightened in order of pitch only in a part of the sound range.

11w ... White key, 11b ... Black key, 12 ... Key frame, sk ... Through hole, Notch ... ct, sf, sg ... Support member, ek, ef, ej , Eg ... engaging member, ek1, ef1 ... first engaging member, ek2, ef2 ... second engaging member, ek3, ef3 ... third engaging member, UK, UF.・ Uneven part, FR ... Frame

Claims (11)

A plurality of keys that are assigned pitches and swing by being pressed and released by the performer,
A plurality of support members that engage with the plurality of keys and respectively support the plurality of keys;
In a keyboard device comprising a frame that supports the plurality of support members,
The position in the front-rear direction of the plurality of support members is set according to the pitch assigned to the key to be supported,
A key base material formed by resin molding, according to the pitches respectively assigned to the at least two keys at the rear end of the key base material common to at least two keys of the plurality of keys The keyboard device according to claim 1, wherein an engagement portion that engages with the support member is added at a position to form the at least two keys. The keyboard device according to claim 1,
A keyboard device, wherein the engagement portion is formed by removing a part of a rear end portion of the key base material. The keyboard device according to claim 1,
A keyboard device, wherein an engagement member that engages with the support member is assembled to a rear end portion of the key base material to form the engagement portion. The keyboard device according to claim 3,
The key base material is provided with a first concavo-convex portion in which uneven portions of the same shape are repeatedly formed in the front-rear direction,
A keyboard device, wherein the engaging member is fitted to the first uneven portion. The keyboard device according to claim 4,
A keyboard apparatus characterized in that the concave and convex portions are shifted in the front-rear direction so that the positions of the concave and convex portions constituting the first concave and convex portions of two adjacent keys do not coincide with each other. The keyboard device according to claim 4,
The positions of the support members that support the keys belonging to the predetermined sound range in the front-rear direction are made the same, and the engaging portions of the support members that support the keys belonging to the predetermined sound range and the engagement members are shifted in the front-rear direction. A keyboard device characterized by that. The keyboard device according to claim 6,
The engaging members assembled to the keys belonging to the predetermined sound range are different types of members in which the engaging portion with the support member is displaced in the front-rear direction, and an identifier for identifying the type of the engaging member is A keyboard device provided on an engaging member. The keyboard device according to any one of claims 1 to 7,
The keyboard device, wherein the support member is assembled to the frame. The keyboard device according to claim 8, wherein
The frame is provided with a second concavo-convex portion in which concavo-convex portions having the same shape are repeatedly formed in the front-back direction
A keyboard device, wherein the support member is fitted to the second uneven portion. The keyboard device according to claim 9,
The concave and convex portions are shifted in the front-rear direction so that the positions of the concave and convex portions constituting the two adjacent second concave and convex portions to which the supporting members that support the two adjacent keys are respectively assembled do not coincide with each other. Keyboard device to play. The keyboard device according to any one of claims 1 to 10,
A keyboard device, wherein identifiers representing pitches assigned to the plurality of keys are respectively provided to the plurality of keys.

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