CN107230462B

CN107230462B - Music score pressing tool structure of keyboard musical instrument

Info

Publication number: CN107230462B
Application number: CN201710160017.7A
Authority: CN
Inventors: 宫下慎也
Original assignee: Yamaha Corp
Current assignee: Yamaha Corp
Priority date: 2016-03-25
Filing date: 2017-03-17
Publication date: 2021-04-20
Anticipated expiration: 2037-03-17
Also published as: JP6724467B2; CN107230462A; JP2017173669A

Abstract

The design freedom of the music stand is improved, and a large contact area with the music is ensured. The music stand (20) receives a lower end (103a) of a music score (103). The musical score presser (10) rotates about a rotation center (C) substantially parallel to the arrangement direction of keys of a Keyboard (KB), takes a standing position in which a musical score (103) is pressed from the front when in use, and takes a lying position when not in use. The center of rotation (C) is located at the player-side end (20a) of the music stand (20) in use.

Description

Music score pressing tool structure of keyboard musical instrument

Technical Field

The present invention relates to a music score presser structure of keyboard musical instrument.

Background

Conventionally, in a keyboard musical instrument, a musical score presser that presses from the front is provided on a music stand so as to avoid the musical score placed on the music stand from being closed (patent documents 1 and 2). In the musical score presser structure of patent document 1 described below, a musical score presser is provided on a musical score table disposed on the top surface of a keyboard instrument so as to be rotatable in the left-right direction. The axis of the rotating shaft of the music score pressing tool is parallel to the front and back directions. The rotation shaft is always urged in a direction orthogonal to the axis by the housing, and always generates a resistance force against the rotation. The musical score presser is inclined and erected when in use, and is accommodated in the case when not in use.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2002-258832

Patent document 2: japanese laid-open patent publication No. 10-28617

Disclosure of Invention

However, the obliquely-raised musical score depressor of the conventional type (patent document 1) has a linear bar shape when viewed in the axial direction of the rotating shaft (in a front view when in use). And, in use, a reaction force is received from the musical score in a direction parallel to the axis of the rotation shaft. Therefore, in order to ensure sufficient rigidity, it is necessary to ensure a thickness not only in the axial direction but also in the vertical direction (thickness direction) when stored, and the thickness of the case in which the musical score presser is stored becomes large. Therefore, the degree of freedom in design of the music stand on which the musical score hold-down is arranged is not high. For example, since a music stand provided on the back surface of a keyboard cover of an upright piano needs to be configured to be thin, it is difficult to arrange a thick music score presser on the music stand, and the music score presser cannot be provided on the back surface of the keyboard cover in practice.

In addition, with the conventional bar-shaped musical score presser, the contact surface for actually pressing the musical score is not large. Further, the musical score presser presses the musical score at the end face, particularly the front end portion, in the axial direction of the rotating shaft, and therefore the musical score is actually pressed in a manner close to point contact. Therefore, one musical score presser can press only a single sheet of a musical score, and two musical score pressers are required for one musical score in order to ensure a proper pressing function.

In addition, in the conventional musical score presser, since the rotary shaft of the musical score presser is constantly urged, large friction is generated not only when the musical score presser is erected or stored but also during the rotation. Therefore, there is a fear that the abrasion of the biasing portion is deteriorated due to the repetition of the turning operation, and the posture at the time of standing up and storing becomes unstable, and the durability is lowered.

The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a musical score hold-down structure of a keyboard musical instrument, which can improve the degree of freedom in designing a music stand and ensure a large contact area with a musical score.

In order to achieve the object, a musical score presser configuration of a keyboard musical instrument of the present invention is characterized by having: a music stand (20) which receives the lower end of a music score and a music score presser (10), rotates around a rotation center (C) approximately parallel to the arrangement direction of keys of a Keyboard (KB), takes a standing position in which the music score placed on the music stand is pressed from the front when in use, and takes a lying position when not in use, the rotation center being located at a player-side end (20a) of the music stand when in use.

In order to achieve the object, a musical score presser configuration of a keyboard musical instrument of the present invention is characterized by having: a music stand (20) rotatably disposed on the back surface of the keyboard cover (101) and receiving the lower end of the music book when in use; and a musical score presser (10) which is arranged on the musical score stand so as to be rotatable about a rotation center (C) substantially parallel to the arrangement direction of keys of a Keyboard (KB), and which takes a standing position in which a musical score placed on the musical score stand is pressed from the front when in use, and a lying position when not in use.

Further, reference numerals in parentheses are exemplified.

According to the present invention, the degree of freedom in designing the music stand can be increased, and the contact area with the music score can be secured to a large extent.

Drawings

Fig. 1 is a perspective view (fig. a) of a keyboard instrument to which a musical score hold-down structure is applied, and a plan view (fig. b) of a musical score stand.

Fig. 2 is a perspective view (fig. a) of a music score presser and a perspective view (fig. b) of the music score presser arranged on a music stand in a use state.

Fig. 3 is a cross-sectional view of the musical score presser at the center in the left-right direction in the use state.

Fig. 4 is a cross-sectional view of the musical score presser at the center in the left-right direction in the non-use state while being rotated (fig. (a) and (b)).

Fig. 5 is a cross-sectional view taken along the line a-a in fig. 3 (fig. (a) and (b)) of a modification of the present embodiment.

Fig. 6 is a schematic view of the vicinity of the keyboard in a state where the keyboard lid is closed (fig. (a), (b)).

Description of the reference numerals

10 music score presser, 14 st 1 engaging part, 15 nd 2 engaging part, 20 music stand, 20a player side end part, 23 stopper part, 101 keyboard lid, 103 music score, 103a lower end, C rotation center, H protrusion height, T1 thickness

Detailed Description

[ forms of embodiment ] of the invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1(a) is a perspective view of a keyboard musical instrument to which a musical score hold-down structure according to an embodiment of the present invention is applied. The keyboard instrument 100 is configured as an upright piano, and includes a keyboard lid 101 covering a keyboard KB. A music stand 20 is provided on the back surface of the keyboard lid 101. Fig. 1(b) is a top view of the music stand 20. The music stand 20 is formed in a substantially plate shape long in the left-right direction as the arrangement direction of the keys of the keyboard KB. The music stand 20 is rotatably disposed on the back surface of the keyboard lid 101 via a plurality of rotation shafts 102 formed of hinges or the like. In fig. 1(a), a non-use state of the score stand 20 is shown, and in fig. 1(b), a use state of the score stand 20 is shown. When the music stand 20 is used, the music stand 20 is rotated in a direction of falling to the player side in a state where the fallboard 101 is opened. The lower side of fig. 1(b) is the player side (front side).

Although described in detail later, four musical score presses 10 are provided on the upper side of the musical score stand 20 in use. Each music score presser 10 is rotatably disposed on the music stand 20 about a rotation center C (about a rotation axis C). The rotation center C is located at a front end portion of the music stand 20 (an end portion of the music stand 20 farthest from the keyboard lid 101 when the music stand 20 is in an open state described later), that is, at a player-side end portion 20a of the music stand 20 in a use state. The musical score depressors 10 have a common structure, and therefore, the structure of one musical score depressor 10 will be described in detail representatively below.

Fig. 2(a) is a perspective view of a musical score presser 10 arranged on a music stand 20 in a use state. Fig. 2(b) is a perspective view of the musical score presser 10. Fig. 3 is a cross-sectional view of the musical score presser 10 at the center in the left-right direction in the use state. Fig. 4(a) and (b) are cross-sectional views of the musical score presser 10 at the center in the left-right direction during rotation and in a non-use state, respectively. Fig. 5(a) is a sectional view taken along line a-a of fig. 3.

First, the single structure of the musical score presser 10 will be described mainly with reference to fig. 2(b), 3, and 5 (a). The musical score presser 10 has a substantially cylindrical shaft mechanism 11 and a plate-like pressing member 12, and is formed integrally of resin or the like. The shaft mechanism 11 has a longitudinal direction that is a direction of the rotation center C (a direction parallel to the rotation center C). When the axis mechanism 11 is disposed on the music stand 20, the rotation center C is substantially parallel to the arrangement direction of the keys of the keyboard KB, that is, substantially parallel to the left-right direction. In other words, the straight line formed by the tips of the keys of the keyboard KB arranged in the left-right direction is substantially parallel to the axis of the rotation center C. The 1 st engaging portion 14 and the 2 nd engaging portion 15 are formed to slightly protrude outward in the radial direction of the shaft mechanism portion 11, and the hollow portion 11b is formed inside the shaft mechanism portion 11. Therefore, the shaft mechanism portion 11 has a hollow portion 11b, and thus has a shape in which a part of the side of the columnar shape is open.

Shaft portions

13A and 13B that are pivotally supported on the musical score stand 20 are formed to protrude from both end portions of the shaft mechanism portion 11 in the direction of the rotation center C. The 1 st engaging portion 14 and the 2 nd engaging portion 15 are located at positions facing each other with the rotation center C therebetween. The 1 st engaging portion 14 is located below the rotation center C and protrudes downward from the shaft mechanism portion 11 when the musical score presser 10 is located at a standing position described later, and the 2 nd engaging portion 15 is located behind the rotation center C and protrudes rearward from the shaft mechanism portion 11 when the musical score presser 10 is located at a lying position described later. Since the hollow portion 11b is present, a gap is formed between the 1 st engagement portion 14 and the rotation center C, and between the 2 nd engagement portion 15 and the rotation center C (fig. 3).

Next, the structure of the music stand 20 will be described mainly with reference to fig. 2(a), 3, and 5 (a). The music stand 20 is configured by combining the 1 st case 21 and the 2 nd case 22, but both may be integrally formed. A recess 29 for arranging the musical score presser 10 is formed in the musical score stand 20. In the 1 st housing 21, bearing

portions

27A and 27B (fig. 5 a) are formed to pivotally support the

shaft portions

13A and 13B of the shaft mechanism 11. The bearing

portions

27A and 27B are formed at positions such that the rotation center C is located on the player side of the concave portion 29 in a use state where the keyboard lid 101 is in an open state and the music stand 20 is in an open state (a state where the music 103 is supported). When the music stand 20 is used, the music stand 20 supports a lower end 103a (fig. 3) of a music score 103.

The musical score presser 10 rotates about the rotation center C, and takes a standing position (upright position) (fig. 3) in which the musical score 103 placed on the music stand 20 is pressed from the front side in use, and a lying position (down position) (fig. 4 b) in which the musical score is laid below the lower end 103a of the musical score 103 placed on the music stand 20 in non-use. The musical score presser 10 is rotatable between a standing position and a lying position (fig. 4 (a)). When the musical score presser 10 is at the standing position, the 1 st engaging portion 14 faces downward and the 2 nd engaging portion 15 faces upward (fig. 3). On the other hand, when the musical score presser 10 is in the lying position, the 1 st engaging portion 14 faces the front end side of the musical score stand 20, and the 2 nd engaging portion 15 faces the side of the turning shaft 102 (fig. 4 (b)).

A part of the bottom upper surface of the 2 nd case 22 in the recess 29 (a bottom surface which is an upward surface in the recess 29) functions as the 1 st pressure receiving part 24 which is pressed against the 1 st engagement part 14 when the musical score presser 10 is at the standing position (fig. 3). The 1 st engaging part 14 abuts against the 1 st pressure receiving part 24 to position the standing position of the musical score presser 10. A part of the end surface of the 2 nd case 22 on the front end side in the recess 29 (the surface facing forward in the recess 29) functions as the 2 nd pressure-receiving section 25 which is pressed against the 2 nd engaging section 15 when the musical score presser 10 is in the lying position (fig. 4 (b)). The 2 nd engaging part 15 abuts against the 2 nd pressed part 25 to position the lying position of the musical score presser 10. The outer peripheral surface 11a of the shaft mechanism 11 is located radially inward of the 1 st engaging part 14 and the 2 nd engaging part 15, and does not contact with the 1 st pressure receiving part 24 and the 2 nd pressure receiving part 25 during the rotation of the musical score presser 10.

The 1 st housing 21 in the recess 29 is formed with an end face stopper portion 23 on the rotation shaft 102 side. When the musical score presser 10 is excessively loaded and rotated beyond the upright position shown in fig. 3, the pressing member 12 of the musical score presser 10 abuts against the stopper 23, and excessive deformation of the 1 st engaging portion 14 and the 1 st pressure-receiving portion 24 is prevented. The cover member 26 such as artificial leather covers substantially the entire surface of the 1 st case 21 exposed above in use. Although the 1 st case 21 and the 2 nd case 22 are fastened by screws, the screws are shielded by the cover member 26 and do not appear in appearance.

In this configuration, when the music stand 20 and the music score presser 10 are used to place the music score 103, the user opens the keyboard lid 101 and further opens the music stand 20. Then, the user rotates the necessary musical score presser 10 to the standing position. For example, in the case where it is desired to hold one musical score 103 at the center in the left-right direction of the keyboard instrument 100, it is sufficient to stand two at the center of the four musical score pressers 10. Alternatively, in a case where it is desired to hold two music scores 103 aligned on the left and right, it is appropriate to stand up four music score pressers 10. In addition, when it is desired to hold the musical score 103 only on the bass side and only on the treble side, a mode of raising two left-side musical score pressers 10 or two right-side musical score pressers 10 may be considered. In short, the pressing member 12 of the standing musical score presser 10 has a large area for securing the rear surface (the surface facing the rear surface of the keyboard lid 101), and the area that can be in contact with the musical score 103 is larger than that of the conventional obliquely standing musical score presser. The pressing member 12 presses the musical score 103 from the front.

However, in the standing position and the lying position of the musical score presser 10, the flat surfaces of the engaging

portions

14 and 15 are pressed against the

pressure receiving portions

24 and 25. When the musical score presser 10 is turned from the standing position in the lying direction, the flat surface of the 1 st engaging part 14 is separated from the 1 st pressure receiving part 24, and the corner 14a (fig. 3) of the 1 st engaging part 14 abuts on the 1 st pressure receiving part 24. When the musical score presser 10 is further rotated in the lying direction, the corner 14a comes into sliding contact with the 1 st pressed part 24, and subsequently, the corner 14a also moves to a stage in the middle of the rotation away from the 1 st pressed part 24. Here, the 1 st engagement portion 14 and the 1 st pressure-bonded portion 24 are pressed against each other, and a resistance force against a rotation in a lying direction from a standing position is generated, and particularly, a maximum resistance force is generated while the corner portion 14a is abutted against and separated from the 1 st pressure-bonded portion 24. Therefore, a peak of the resisting force is generated at the initial stage of the rotation of the musical score presser 10 out of the standing position.

On the other hand, when the musical score presser 10 is rotated between the standing position and the lying position, a stroke is passed through which the outer peripheral surface 11a of the shaft mechanism 11 does not contact either of the 1 st pressure-receiving part 24 and the 2 nd pressure-receiving part 25 (fig. 4 (a)). Therefore, the maximum value of the resisting force generated when the musical score presser 10 is out of the standing position is larger than the minimum value of the resisting force generated in the middle of rotation.

The musical score presser 10 can be similarly recognized when it is rotated from the lying position to the standing position. That is, the corner 15a (fig. 3) of the 2 nd engaging portion 15 abuts on the 2 nd pressure-receiving portion 25 while the flat surface of the 2 nd engaging portion 15 is separated from the 2 nd pressure-receiving portion 25. Thereafter, the corner 15a comes into sliding contact with the 2 nd pressure-bonded part 25, and then moves away from the 2 nd pressure-bonded part 25 to a stage in the middle of the rotation. Therefore, a peak of the resisting force is generated at the initial stage of the rotation of the musical score presser 10 out of the lying position. The maximum value of the resisting force generated when the musical score presser 10 is out of the lying position is larger than the minimum value of the resisting force generated in the middle of rotation.

In this way, the maximum value of the resistance force generated when the musical score presser 10 is out of the standing position or the lying position is larger than the minimum value of the resistance force generated in the middle of the rotation, and therefore the posture of the musical score presser 10 in the standing position or the lying position is stabilized. Further, when the musical score presser 10 reaches the standing position or the lying position from a stage in the middle of the rotation, a stage in which a peak of the resisting force is generated also passes. This makes it possible to obtain a sense of strangeness (japanese: a sense of temperature) at the firm position of the standing position and the lying position, and to realize a turning operation accompanied by a comfortable click-in sense (japanese: クリック sense). In addition, since the musical score presser 10 hardly generates friction or resistance in the middle of the rotation of the musical score presser 10, smooth rotation and durability of the musical score presser 10 are ensured. Further, by forming the hollow portion 11b between the engaging

portions

14 and 15, the engaging

portions

14 and 15 can be easily bent in the radial direction, and an appropriate pressing force can be exerted. Moreover, the structure can be simplified.

As shown in fig. 4(b), in the lying position, the musical score hold-down 10 is within the range of the thickness T1 of the music stand 20, not protruding from the music stand 20. In the lying position, the upper surface of the pressing member 12 of the musical score presser 10 may be flush with the upper surface of the musical score table 20. In addition, the thickness T2 of the pressing member 12 of the musical score presser 10 is less than half of the thickness T1 of the musical score stand 20. This can maintain the rigidity and thinness of the music stand 20. In particular, it is easy to avoid the screw from being expressed on the back side (bottom surface in use) of the music stand 20, and the appearance can be prevented from being deteriorated.

Fig. 6(a) and (b) are schematic views of the vicinity of the keyboard KB in a state where the keyboard lid 101 is closed. Since the pressing member 12 is thin, the music stand 20 can be designed not to be thick. Therefore, as shown in fig. 6(a), in a state where the music stand 20 is closed, even if the keyboard lid 101 is closed, the music stand 20 does not interfere with the keyboard KB. In the present embodiment, the protruding height H of the pressing member 12 at the standing position of the musical score presser 10 from the musical score stand 20 is set so that the musical score stand 20 does not interfere with the keyboard KB even if the keyboard lid 101 is forgotten to be closed in order to close the musical score presser 10 and the musical score stand 20. That is, the protrusion height H (fig. 3) is set to the following height: even if the musical score stand 20 is rotated with the musical score presser 10 kept at the standing position, and the front end portion of the pressing member 12 abuts against the keyboard lid 101, the keyboard lid 101 is closed, and the musical score stand 20 does not contact the keyboard KB (fig. 6 (b)). This can prevent the keyboard KB from interfering with the keyboard cover 101 even if an unintended operation is performed.

According to the present embodiment, the rotation center C is located at the player-side end 20a of the score stand 20 at the time of use. The musical score presser 10 is rotatable about a rotation center C substantially parallel to the array direction of the keys, and presses the musical score 103 from the front by the pressing member 12 at a standing position taken at the time of use. That is, the musical score presser is different from the conventional structure in which the axis of the rotary shaft of the musical score presser is parallel to the front-rear direction. Accordingly, the length from the rotation center C to the rotation shaft 102 can be ensured to be long, and the length (height) of the pressing member 12 of the musical score presser 10 in the direction orthogonal to the rotation center C can also be set to be long. Further, since the reaction force received from the musical score 103 is in a direction orthogonal to the rotation center C, not in parallel thereto, the pressing member 12 does not need to be excessively thick, and the limitation of the thickness of the musical score stand 20 is small. In addition, the length of the musical score hold-down 10 in the left-right direction can be freely designed, and if it is long, the musical score 103 can be pressed in a wide range. Therefore, the degree of freedom in designing the music stand 20 can be improved, and a large contact area between the pressing member 12 and the music score 103 can be ensured.

According to the present embodiment, the maximum value of the resisting force generated with respect to the rotation of the musical score presser 10 when the musical score presser 10 is out of the standing position and out of the lying position is larger than the minimum value of the resisting force generated in the middle of the rotation, and therefore the postures of the standing position and the lying position of the musical score presser 10 are stabilized. Further, the musical score presser 10 can be provided with a sense of moderation in two stable states with a simple configuration in which the 1 st engaging portion 14, the 2 nd engaging portion 15, the 1 st pressure receiving portion, and the 2 nd pressure receiving portion 25 are provided. When the musical score presser 10 is rotated between the standing position and the lying position, a stroke is passed through which the outer peripheral surface 11a of the shaft mechanism 11 does not contact either the 1 st pressure-receiving part 24 or the 2 nd pressure-receiving part 25. This can avoid generation of a large resistance force and friction during rotation, ensure smooth rotation, and suppress deterioration of wear and reduction of durability. Further, since the stopper portion 23 is provided on the music stand 20, the musical score presser 10 is received against an excessive rotational force, and durability can be improved. Further, since the music stand 20 is rotatably disposed on the back surface of the keyboard lid 101, the music score 103 can be placed on the back surface of the keyboard lid 101, and the music stand can be applied to a stand-up piano.

However, the conventional obliquely standing bar-shaped musical score presser presses the musical score almost only with the tip end portion so as to approach point contact. In contrast, in the present embodiment, the pressing member 12 is also long in the left-right direction, and can function to press the musical score 103 at any position in the left-right direction. Therefore, a use method of simultaneously pressing two music scores 103 with one music score presser 10 can also be realized. For example, the right end of the left musical score 103 and the left end of the right musical score 103 are positioned at the center in the left-right direction of one pressing member 12, whereby the function of pressing the single sheet of two musical scores 103 is exerted. This can be sufficiently achieved if the length of the pressing member 12 in the left-right direction is increased. Therefore, by providing three musical score pressers 10, two musical scores 103 can be pressed simultaneously. Such a method of use is extremely difficult in the conventional type.

In addition, from the viewpoint of stabilizing the postures of the standing position and the lying position of the musical score presser 10, the following is also conceivable. First, the maximum value of the resistance force generated when the musical score presser 10 is out of the standing position or the lying position may be larger than the minimum value of the resistance force generated in the middle of rotation. Therefore, when the musical score presser 10 is rotated between the standing position and the lying position, it is not necessary to pass through a stroke in which the outer peripheral surface 11a of the shaft mechanism portion 11 does not contact either of the 1 st pressure-receiving part 24 and the 2 nd pressure-receiving part 25. Further, it is sufficient that the musical score presser 10 generates a resistance force at least when it is out of the standing position or the lying position. Therefore, in the standing and lying states, the engaging

portions

14 and 15 do not necessarily have to be pressed against the

pressure receiving portions

24 and 25, respectively, and may be configured to be pressed against only one of the groups. Note that, the musical score presser 10 may be configured such that the corners 14a and 15b of the engaging

portions

14 and 15 come into contact with the

pressure receiving portions

24 and 25 at least at the start of rotation when the musical score presser is out of the standing or lying state, and it is not always necessary that the flat surfaces of the engaging

portions

14 and 15 come into contact with the

pressure receiving portions

24 and 25 in the standing or lying state. Further, the structure in which the peak of the resistance force is generated at the beginning of the rotation when the musical score presser 10 is out of the standing or lying state is not necessarily required, and for example, the structure in which the engaging

portions

14 and 15 are curved surfaces having a constant curvature around the rotation center C is not excluded.

In the present embodiment, the

shaft portions

13A and 13B of the shaft mechanism 11 are pivotally supported by the bearing

portions

27A and 27B, but the relationship of the irregularities may be reversed. That is, as shown in a modification of fig. 5(B), the shaft mechanism 11 may have

recesses

16A and 16B formed at both ends thereof, and the

shaft portions

28A and 28B formed in the 1 st case 21 may have

recesses

16A and 16B pivotally supported thereon.

Note that, a portion formed on the music stand 20 to be engaged with the music score presser 10 may be provided on any portion of the music stand 20 as far as the mechanism permits, or may be formed on either the 1 st case 21 or the 2 nd case 22. Note that the music stand 20 may be formed by combining three or more members, and in this case, a portion to be engaged with the music score presser 10 may be formed in any one member. In addition, the musical score hold down structure may be applied to a musical score stand disposed on a top plate of a keyboard instrument, regardless of the position of the musical score stand to which the musical score hold down structure of the present invention is applied.

The present invention has been described in detail based on preferred embodiments, but the present invention is not limited to these specific embodiments, and various embodiments within a scope not departing from the gist of the present invention are also included in the present invention.

Claims

1. A music score presser structure of a keyboard instrument, characterized by comprising:

a music stand (20) for receiving a lower end of a music score;

a music score presser (10) which is thinner than the thickness of the music stand, rotates around a rotation center approximately parallel to the arrangement direction of keys of the keyboard, takes a standing position for pressing a music score placed on the music stand from the front when in use, takes a lying position when not in use, and is accommodated within the range of the thickness of the music stand,

the center of rotation is located at a player-side end portion (20a) of the music stand in use,

the music stand is provided with a stopper portion (23) that abuts against the music score presser when the music score presser rotates beyond the standing position.

2. The musical score presser construction of keyboard instrument as set forth in claim 1,

the musical score pressing tool is provided with a 1 st engaging part (14) which abuts against the musical score table to position the standing position when in use, and a 2 nd engaging part (15) which abuts against the musical score table to position the lying position when not in use.

3. The musical score presser construction of keyboard instrument as set forth in claim 2,

the music stand is provided with a concave part (29) for accommodating the music pressing tool,

in the recess, a 1 st pressure-receiving part (24) abutting against the 1 st engagement part and a 2 nd pressure-receiving part (25) abutting against the 2 nd engagement part are formed.

4. The musical score presser configuration of keyboard instrument as set forth in any one of claims 1 to 3,

the music stand is rotatably disposed on the back surface of the keyboard cover.

5. A music score presser structure of a keyboard instrument, characterized by comprising:

a music stand (20) rotatably disposed on the back surface of the keyboard cover (101) and receiving the lower end of the music book when in use;

a music score presser (10) that is thinner than the thickness of the music stand, is rotatably disposed on the music stand about a rotation center substantially parallel to the arrangement direction of the keys of the keyboard, takes a standing position for pressing a music score placed on the music stand from the front when in use, takes a lying position when not in use, and is housed within the range of the thickness of the music stand,

6. The musical score presser construction of keyboard instrument as set forth in claim 5,

the height of the music score hold-down assuming the standing position protruding from the music stand is set to the following height: even if the music stand is rotated with the music score presser held at the standing position, and the front end portion of the music score presser comes into contact with the keyboard lid, and the keyboard lid is closed, the music score stand does not contact the keyboard.

7. The musical score presser construction of keyboard instrument as set forth in claim 5 or 6,

the music score presser is located within the range of the thickness of the music stand in the lying position.

8. A music score presser structure of a keyboard instrument, characterized by comprising:

a music stand (20) for receiving a lower end of a music score;

a musical score presser (10) that rotates about a center of rotation substantially parallel to the arrangement direction of keys of the keyboard, takes a standing position in which a musical score placed on the musical score stand is pressed from the front when in use, and takes a lying position when not in use,

the musical score pressing tool is provided with a 1 st engaging part (14) which abuts against the musical score table to position the standing position when in use, and a 2 nd engaging part (15) which abuts against the musical score table to position the lying position when not in use,

by the engagement between the 1 st and 2 nd engaging portions and the music stand, a maximum value of a resistance force generated with respect to the rotation of the music score press when the music score press is disengaged from the standing position and a maximum value of a resistance force generated with respect to the rotation of the music score press when the music score press is disengaged from the lying position are both larger than a minimum value of a resistance force generated in the middle of the rotation between the standing position and the lying position.