JPS595912B2 - keyboard instrument - Google Patents

Description

[Detailed description of the invention] The present invention relates to a keyboard instrument such as a piano.

For example, as a conventional grand piano, the first
A device configured as shown in the figure is known.

That is, a tuning pin 3 is embedded in a pin plate 2 attached to the lower surface of one end 1a of a frame-shaped metal frame 1, passing through the frame 1, and on the other hand, a tuning pin 3 is installed on the upper surface of the other end lb of the frame 1. A frame pin 4 is installed, and a string 5 is stretched between the frame pin 4 and the tuning pin 3, and in the middle of the string 5, there is a capodastro bar 6 made of a part of the frame 1, and a string 5. A space between the capodastro bar 6 and one of the hooks 9 is partitioned by two hooks 9 and 10 driven into the bridge 8 provided on the upper surface of the soundboard 7 arranged on the lower side of the frame 1. It is considered to be an effective vibration sounding section. When the well-known piano action mechanism is activated in response to the pressing operation on the keyboard, the damper 11 is raised and separated from the strings 5, and the shank rail 12 disposed below the pin plate 2 is moved upward. A hammer shank 14, whose one end is rotatably attached to the upper surface via a shank flange 13, rotates clockwise.
The string 5 is struck by a hammer 15 attached to the tip of the string 5 to generate sound. Note that when the pressing operation on the keyboard is released, the damper 11 descends and contacts the string 5 to stop its sound, and the hammer 15 rotates counterclockwise together with the hammer shank 14, thus all mechanisms returns to its original resting state. However, in such a conventional grand piano, one hammer 15 is moved to one string 5 by pressing one key.
Since this string 5 is made to vibrate and produce sound by hitting the
There was a limit to the tones that could be obtained.

This invention was made in view of the above circumstances, and aims to provide a keyboard instrument that can produce a tone different from that of conventional keyboard instruments. A sub-striking body is provided separately from the main striking body, and this sub-striking body is connected to the main striking body so as to move integrally, and a sounding body other than a string is provided corresponding to this sub-striking body, and a key is provided. The mechanical motion associated with the operation of the oscillator is converted into an electrical signal, and the oscillation mechanism is operated using this electrical signal.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 4.

In order to avoid complication of explanation, the same parts as those of the conventional example shown in FIG. In this embodiment, another hammer 16 (hereinafter referred to as the second hammer) is located at a predetermined position in the middle of the hammer shank 14, and a hammer 15 (hereinafter referred to as the first hammer) attached to the tip of the hammer shank 14. mounted in parallel. Also, this second
A band-shaped sounding body 17 made of metal is provided corresponding to the hammer 16. This sounding body 17 has one end attached to the lower surface of the pin plate 2 with a screw 18 and is disposed so as to be parallel to the string 5 as a whole, and the other end is a free end and is attached to the second hammer 16. is located above. Note that the sounding body 17 is connected from the head of the second hammer 16 in the rest position.
The distance is set to correspond to the distance from the head of the first hammer 15 at the rest position }ζ to the string 5, that is, the string-striking distance. In addition, in FIG. 2, reference numeral 19 indicates a shelf board of a grand piano, and the upper end surface of a peripheral side plate 21 having a ventilation hole 20 in a part is fixed to the lower peripheral edge of this shelf board 19. A peripheral edge of the upper surface of a sub-shelf board 23 having a ventilation hole 22 in a portion thereof is fixed to the lower end surface of the sub-shelf board 23 .

A reed oscillator 24 is provided between the shelf board 19 and the sub-shelf board 23.
is provided. This lead oscillator 24 has a hollow lead box 25 with a rectangular cross section partitioned at the center by a plate 27 having a slit 26, a lead 28 disposed within the slit 26 of the plate 27, and one end of the lead 28. is attached to a predetermined position on the plate 27 with screws 29, and the lower end opening of the lead box 25 is communicated with the ventilation hole 22 of the sub-shelf board 23. There is a ventilation hole 3 at a predetermined position on the upper end of the
0 is formed. A blower 31 is attached to a predetermined position on the lower surface of the sub-shelf board 23, and an air outlet of the blower 31 is connected to the ventilation hole 22 of the sub-shelf board 23 via a solenoid valve 32 and a pipe 33. The solenoid valve 32 is normally closed, and is opened when a micro switch 34 disposed at a predetermined position near the hammer shank 14 is closed. Note that this micro switch 34 is normally opened, and the hammer shank 14 is rotated clockwise when the key is operated.
The actuator is pushed and closed by the actuator. Note that the second hammer 16 and the corresponding sounding body 17, furthermore, the reed oscillator 24 and the corresponding solenoid valve 32, micro switch 34, etc. may be provided respectively corresponding to all the keys. They may be provided corresponding to each key in at least one of the low, middle, and treble ranges, and the number and mode of installation can be arbitrarily selected.

Next, the operation of the above-mentioned device will be explained. When one key is pressed, the hammer shank 14 corresponding to this key rotates clockwise, and as a result, the first hammer 15 strikes the string 5. The string 5 is made to vibrate and make sound as before, and the second hammer 16 attached to the same hammer shank 14 strikes the sounding body 17 to vibrate the sounding body 17 at the same time, and at the same time, the micro switch 34 is activated. By closing the solenoid valve 32 and opening the solenoid valve 32, the air from the blower 31 flows through the solenoid valve 32 and the pipe 3.
3. It passes through the ventilation hole 22 of the sub-shelf board 23, the slit 26 of the plate 27, the ventilation hole 30 of the reed box 25, and the ventilation hole 20 of the peripheral side plate 21 in order to be emitted to the outside, and vibrates the reed 28 along the way. It is something to be pronounced.

Note that when the pressing operation on the key is released, damper 1
1, the vibrating sound of the string 5 is stopped as in the conventional case, while the sounding body 17 and the reed 28 continue to vibrate and attenuate naturally. In this way, when one key is pressed, the string 5, non-string sounding body 17, and reed 28 that correspond to this key vibrate and produce sound simultaneously, and the sound obtained is a composite sound, which is different from the conventional one. produces a different tone.

Also, in this case, the second hammer 16 is the first hammer 1.
It is attached to the same hammer shank 14 as 5,
Since they are designed to move in one piece, there is no risk of causing any strange sensations such as shaking when the key is touched, and the timing of the strikes of both hammers 15 and 16 can always be precisely matched through adjustment. A reproducible pronunciation effect can be obtained.

Furthermore, since an electrical signal transmission mechanism using a micro switch 34 is adopted as a means for transmitting the mechanical movement accompanying the key operation to the reed 28, the hammer shank 14
It does not have a large effect on the movement of the key, and does not cause any inconvenience such as making the key touch heavier.

Therefore, it is possible to enjoy smooth playability that is not much different from that of a conventional piano. In the above embodiment,
Although one end of the sounding body 17 is fixed to the lower surface of the pin plate 2, the present invention is not limited to this. For example, as shown in FIG. The central part of the swinging member 41 is swingably attached to the swinging member 41 via a shaft 42, and one end of the sounding body 17 is attached to the lower surface of one end of the swinging member 41 with a screw 18. The other end is always biased clockwise by a leaf spring 43, and the upper end of the protruding rod 44, which is moved up and down as the pedal is operated, is brought into contact with the lower surface of the other end of the swinging member 41. By operating the pedal appropriately, the position of the sounding body 17 is changed and the distance from the head of the second hammer 16 to this sounding body 17 is changed, thereby causing the rehammer shank 14 to move clockwise. As it rotates, string 5 and sounding body 1
7, at least one of which corresponds to the first hammer 15;
Alternatively, it may be configured to be struck by the second hammer 16. Further, in the embodiment described above, the metal belt-shaped sounding body 17 is provided in correspondence with the second hammer 16, but the sounding body 17 is not limited to this as long as it is made of something other than a string.

Further, in the above embodiment, the second hammer 16 is used to strike the sounding body 17 to produce a raw sound, but the present invention is not limited to this, and for example, the vibration of the sounding body 17 can be generated by picking up a pressure-sensitive element or the like. After converting the signal into an electrical signal, the amplifier
The vibration of the sounding body 17 may be electrically amplified by a speaker or the like, or the vibration of the sounding body 17 may be mechanically amplified by, for example, a second sound board.

Further, in the above embodiment, the reed 28 is mechanically vibrated to produce sound when the micro switch 34 is closed, but the present invention is not limited to this. It may also be configured to electrically generate a preset sound.

Furthermore, in the first and second embodiments described above, only one second hammer 16 is provided as the sub-impacting body, but the invention is not limited to this, and a plurality of hammers may be provided to correspond to the second hammer 16. A configuration may also be adopted in which a plurality of sounding bodies are provided.

In addition, in the above embodiments, the case where the present invention is applied to a grand piano has been described, but the present invention is not limited to this, and can be widely applied to other string-type keyboard instruments such as upright pianos and electric pianos. Of course it is possible.

As described above, the keyboard instrument according to the present invention includes a sub-striking body that is provided with a sub-striking body separate from the main striking body that strikes the strings, and that this sub-striking body is connected to the main striking body so as to move integrally with the main striking body. A sounding body other than a string is provided in correspondence with the key, and a converter is provided to convert the mechanical motion caused by the operation of the key into an electrical signal, and an oscillation mechanism is provided that is activated by the electrical signal from the converter. Because of this structure, by pressing a single key, the strings, the sounding body other than the strings, and the oscillation mechanism can be sounded simultaneously to obtain a composite sound, which is different from conventional ones. You can get the tone.

In addition, in particular, in this invention, since both the main and auxiliary striking bodies are connected so as to move as one, there is no risk of causing discomfort such as shaking when touching the key, and both the striking bodies can be adjusted depending on the adjustment. The timing of the blows can always be precisely matched,
A reproducible pronunciation effect can be obtained.

Furthermore, since the present invention is configured to convert the mechanical motion accompanying the key operation into an electrical signal and transmit it to the oscillation mechanism, there is no problem such as making the key touch heavier.

Therefore, it is possible to obtain playability that is not much different from that of a conventional piano. Further, in this case, since the oscillation mechanism and the converter are once converted into an electric signal and transmitted, it is possible to separate the oscillation mechanism and the converter by a distance, and it is possible to avoid complicating the mechanism. This has the advantage of providing practical products in terms of reliability and cost.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing a part of an example of a conventional grand piano, Fig. 2 is a longitudinal side view showing a main part of an embodiment in which the present invention is applied to a grand piano, and Fig. 3 is a longitudinal side view showing a part of an example of a conventional grand piano. FIG. 4 is a longitudinal sectional side view of the main part showing another embodiment of the invention, and FIG. 4 is a perspective view showing a part of FIG. 2. 1...Frame, 2...Pin board, 5.
...Strings, 7...Soundboard, 12...
Chayan Claire, 14...Hammershank,
15, 16... Hammer 17 bodies, 19...
...Shelf board, 23... Sub-shelf board, 24 Do oscillator,
31...Blower, 32...Solenoid valve, 3
4...Micro switch.

Claims (1)

[Claims] 1. In a string-type keyboard instrument in which the main striking body strikes the strings to produce sound when the keyboard is operated, a sub-striking body separate from the main striking body is provided for one key, and This secondary striking body is connected to the main striking body so as to move integrally with the main striking body, and a sounding body other than a string is provided in correspondence with the secondary striking body, and furthermore, the mechanical movement accompanying the operation of the key is converted into an electrical signal. A keyboard instrument comprising a converter for conversion and an oscillation mechanism operated by an electric signal from the converter.