JPS6044665B2 - Piano performance training device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piano performance training device capable of providing a touch sensation similar to that of a general piano.

For performing pianists, practicing while working as a self-employed person is essential.

However, practicing with the piano itself makes a lot of noise and causes a great deal of inconvenience to nearby residents, which limits the practice location and time, and even if a suitable practice location is found, the heavy piano must be carried to the location. requires a great deal of effort. Therefore, it has traditionally been used as a piano practice device.
For example, a practice keyboard as disclosed in Japanese Utility Model Application Publication No. 51-94367 has been proposed.

This practice keyboard is made up of a pair of left and right shelves, each of which has a plurality of keys arranged to be able to swing up and down, and is foldably connected by a hinge, and is inexpensive and highly portable. It has the great advantage of being easy to use, making it indispensable for beginners who own a piano and are learning how to play the piano.However, since it has only keys and no action mechanism, it has a touch feel similar to that of a piano. was not suitable for full-scale practice. In addition, recently, piano-touch electronic pianos and electric pianos have been developed, and people are practicing using them, but the touch feeling is still insufficient and they cannot fully satisfy the needs of pianists. However, because it has the great advantage of being able to adjust the volume, it is actually used by some people for night practice, although they are not satisfied with it.

This invention was made in view of the above points,
To provide a performance training device for a piano capable of obtaining a touch sensation similar to that of an ordinary piano by being configured with keys, an action mechanism, and a hit body similar to those of an ordinary piano.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a partially cutaway perspective view showing an embodiment of the piano performance training device according to the present invention, and FIG. 2 is a side sectional view showing the keyboard section of the device.

In these figures, the piano performance training device, designated as a whole by reference numeral 1, is horizontally supported by a total of four legs, that is, a pair of left and right front legs 2A, 2B and a pair of rear legs 3A, 3B (3B is not shown). It is equipped with a horizontally long box-shaped cabinet 5 held therein, and a plurality of keys 6, an action mechanism 7, a string 8, a damper mechanism 9, etc., each stored and arranged in a fixed relationship with each other inside the cabinet 5. There is. The cabinet 5 includes a shelf board 10, a pair of left and right side boards 11a,
11b1 is composed of the roof 12, the front plate 13, and the rear plate 14, so that the part from the front plate 13 to the front end of the shelf board 10 is opened upward, and the front ends of the plurality of keys 6 are inserted into this open part. 6a protrudes and constitutes a keyboard section 15.

Note that casters 16 are provided at the lower ends of the front legs 2A, 2B and the rear legs 3A, 3B, respectively, so that the cabinet 5 can be moved to a predetermined installation location. The plurality of keys 6 are disposed on a keyboard reed 17 disposed on the shelf board 10 so as to be freely movable in the vertical direction with the intermediate portions as rotational fulcrums. In other words, each key 6 has 18 keys
A balance key pin 19 planted on the top is inserted into a substantially sector-shaped through hole 20 formed in the middle of the pin, so that it can be freely sung, and an action mechanism 7 is mounted on the upper surface of the rear end 6b. By being placed through the capstan 21, the front end 6a normally floats above the front 22 of the reed, and the rear end 6b is placed on the upper surface of the rear 23 with the felt 24 in between. On the upper surface of the front reed 22, there is an oval key pin 25 whose upper end constantly engages with a recess (not shown) formed on the lower surface of the front end 6a of the key 6, thereby restricting and preventing rotation of the key 6 in the left and right direction. has been planted. The front end 6a of the key 6 has a rear end pivoted to the lower end of the front plate 13 via a hinge. When not in use, the keyboard is covered and protected by a keyboard lid 26 that can be opened and closed. Note that the keyboard reed 17 is the aforementioned reed medium 1.
8. A keyboard formed in a lattice shape by a front reed 22, a rear reed 23, and a plurality of keyboard reeds 27 that integrally connect these three members, and whose rear end is fixed on the shelf board 10. It is locked by a barb 28. Each action mechanism 7 disposed above the rear end 6b of each key 6 is formed substantially the same as the action mechanism of a grand piano, and is rotated upward in conjunction with the key depression operation of the key 6. Equipped with 30 supports.

This support 30 has one end pivotally supported vertically via a support flange 32 to a support rail 31 formed by extrusion molding of aluminum or the like, and is integrally provided on the lower surface of the free end side. A support heel 30A is placed on the top end surface of the capstan 21. Therefore, as the key 6 is driven, the capstan 21 rises together with the key 6), and when the support heel 30A is pushed up, the support 30 is rotated counterclockwise in the figure. Further, a repetition lever 34 for holding the hammer mechanism 33 at an initial position is disposed on the upper surface of the intermediate portion of the support 30 so as to be freely rotatable in the vertical direction via a repetition lever flange 35. The repetition lever 34 is always given the habit of turning counterclockwise by a repetition lever spring 36, and has a knob at one end that abuts the upper surface of the support 30 to restrict the rotation of the lever 34. A repetition button 37 is provided. The hammer mechanism 33 has a hammer shank 40, one end of which is vertically rotatably supported on a shank rail 39 via a shank flange 38, and the other end of the hammer shank 40 has a generally oval shape. The formed hammer 41 is fixed via a hammer wood 42, and a hammer roller 43 is attached to the lower surface of the shank 40 on the rotation fulcrum side and is normally placed on the repetition lever 34. The hammer 4
1 is made of rubber, felt, etc. that has almost the same elasticity as a normal piano hammer, or is made of an appropriate material that provides almost the same key touch as a normal piano in relation to the object being struck. It is formed from members. A jack 44 formed in a substantially L shape is provided at the free end of the support 30.
is rotatably supported at its bent portion.

This jack 44 is always given a counterclockwise rotational habit by the repetition lever spring 36,
The upper end portion extending upward is always locked in a long hole 45 formed in the repetition lever 34 and normally abuts against the lower surface of the hammer roller 43. Therefore, when the support 30 rotates upward in conjunction with the drive of the key 6, the jack 44 rises together with it and pushes up the hammer roller 43, thereby causing the hammer shank 40 to rotate upward. The hammer 41 corresponds to the string 8 (hit object) corresponding to the key 6
It is configured to strike. In addition, jack 44
In the middle of its upward movement, the small jack 44A comes into contact with the regulation retching button 47 attached to the shank rail 39 via the regulation retching rail 46, and its upward movement is blocked, thereby causing the repetition lever spring 3
6 and is rotated by a small angle clockwise. For this reason, the upper end of the jack 44 temporarily escapes from the lower part of the hammer roller 43, and after the string-striking operation by the hammer 41, the jack 44 is released from the leg reching button 47 as the support 30 rotates downward. The upper end portion enters the lower part of the hammer roller 43 again to enable the next string-striking operation. On the other hand, the hammer mechanism 33 returns to rotation due to its own weight and the repulsive force of the string 8 after the string-striking operation, and the hammer roller 43 is attached to the repetition lever 34 and the hammer wood 42 is attached to the upper surface of the rear end of the key 6. It is held at the initial position by being abutted against and received by the back checks 48 that have been moved. The support rail 31, the shank rail 39, and the leg reching rail 46 extend across all the actuator mechanisms 7 in common, and are erected on the keyboard reed 17 via an action stand (not shown). It is commonly fixed to a plurality of brackets 50, respectively.

Further, a jack stop 51 and a jack button 52 are provided on the upper surface of the free end side of the support 30 and the shank 44 to restrict counterclockwise rotation of the jack 44. Ru. A plurality of strings 8 arranged corresponding to each pitch are formed to be shorter than the strings of a general piano, and both ends are locked to string locking members 53 and 54, respectively, and stretched almost horizontally. has been done. In this case, a regular piano. In this invention, the strings are stretched around a frame made of cast iron or the like, and the vibrations of the strings are diffused and transmitted to the soundboard body through the bridge, thereby increasing the sound of the piano performance. The piano performance training device 1 uses a frame, a soundboard body, etc., and uses sensors 70 and 71, which will be described later, to extract electric or electronic sounds. Like the damper mechanism of a general grand piano, the damper mechanism 9 is provided corresponding to each string 8 of each pitch, and when a key is not pressed, the damper head 56 presses the string 8 from above to dampen its vibration. When the key is pressed, the damper head 56 moves away from the string 8 in conjunction with the key 6, releasing the string 8. One end is rotatably pivoted to the damper lever rail 58 via the damper lever flange 57. a damper lever 59 whose other end extends close to and above the rear end of the key 6; a damper block 60 attached to the free end side of the damper lever 59;
, a damper wire 61 connecting the damper block 60 and the damper head 56, and the like.

A stop rail 62 is provided above the damper lever 59 to restrict upward rotation of the lever 59.
The damper wire 61 is slidably inserted and held in an insertion hole 64 provided in the damper guide rail 63. The sensor 70 is for converting the vibration of the string 8 into an electric signal, and is attached directly to each string 8,
As shown in FIG. 3, it is connected to an amplifier 73 via a switch 72.

On the other hand, the sensor 71 is for detecting key press information of the keys 6, and is disposed below the front end of each key 6.
Key assigner 75 via switch 74 as shown in the figure.
It is connected to the. This key assigner 75 and amplifier 73
is connected to the amplifier 73 via a tone generator 76, and a speaker 77 is connected to the output terminal of the amplifier 73.
Therefore, when the switch 72 is closed and the switch 74 is opened, the vibration of the string 8 is converted by the sensor 70 into an electric signal, which is amplified by the amplifier 73 and then sounded from the speaker 77. It constitutes an electric piano similar to a piano.

On the other hand, when practicing with the switch 72 open and the switch 74 closed, the sensor 71 corresponding to the pressed key 6 detects the operation of the key 6 and receives the detection signal. Therefore, the key assigner 75 is the tone generator 7.
A sound source signal generating element corresponding to the key 6 in 6 is selectively operated, and the sound source signal output from this element is amplified by an amplifier 73 and then outputted from a speaker 77 or listened to through headphones or the like. Therefore, in this case, an electronic piano is configured. As the sensor 70, a well-known pickup device consisting of a piezoelectric element and an electrode plate is used,
As the sensor 71, a well-known key switch or the like whose opening/closing is controlled by the key 6 is used.

In the above embodiment, the case where the action mechanism 7 and the damper mechanism 9 are configured in the same manner as in a grand piano has been described, but the present invention is not limited to this, and the action mechanism and damper mechanism of an upright piano may be used. Of course.

Further, in the above embodiment, a case was explained in which the string 8 was used as the object to be hit, but the present invention is not limited to this, and the present invention is not limited to this, but can be applied to rubber chips, rubber sheets, wooden boards, spring boards, synthetic resin boards, coil springs, etc. as appropriate. members can be used.

In this case, it goes without saying that it is preferable to use a member that, in relation to the hammer, allows the touch of the keys to be the same as that of a normal piano. Furthermore, in the above embodiment, the switch 7
2 and 74, and practice by emitting electric or electronic sounds. However, if you want to simply practice by pressing keys, both switches 72 and 74 may be used in the open state. .

However, in this case, the live sound of the strings 8 is generated, but as described above, since there is no soundboard body, the volume is low and does not disturb nearby residents. Furthermore, the damper mechanism and sensor in the above embodiments are not necessarily necessary, and may be omitted in some cases. As explained above, the piano performance training device according to the present invention, like a general piano, is equipped with an action mechanism driven by a key and a string that is struck by a hammer of the action mechanism. Because of this structure, it is possible to obtain the touch feeling of a piano itself, and it is suitable for pianists' serious practice.

In addition, since it does not include a frame, a soundboard body, a pedal mechanism, etc., it has a simple structure and can be manufactured at low cost, and is lightweight, making it convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing an embodiment of the piano performance training device according to the present invention, FIG. 2 is a side sectional view showing the keyboard section of the device, and FIG.
The figure is a block diagram showing the electrical circuit of the device.

1...Performance training device for Zeano, 5...
Cabinet, 6... Key, 7... Action mechanism, 8... String, 9... Damper mechanism, 10... Shelf board, 33゜゜゜゜゜゜゜hammer mechanism, 41゜゜゜゜゜゜hammer, 70,71...
··sensor.

Claims (1)

[Scope of Claims] 1. A cabinet, a plurality of keys which are vertically swingably arranged on a shelf board of the cabinet and which are operated by key presses, and which are arranged corresponding to each key, A performance training device for a piano, comprising a plurality of action mechanisms that operate in conjunction with the key to respectively strike a hit object corresponding to the key with a hammer. 2. The piano performance training device according to claim 1, wherein the elasticity of the hammer is approximately equal to that of a hammer of a normal piano, and the touch of the keyboard action is approximately the same as that of a normal piano. 3. The piano performance training device according to claim 1 or 2, characterized in that a sensor is provided on the hit body or the keyboard action system to generate an acoustic signal in response to key depression.