JPH0736393Y2 - Grand type automatic piano - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grand type automatic playing piano, and more particularly to a grand type automatic playing piano characterized by the arrangement of a power supply device.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, in a grand type automatic performance piano, a power supply device 101 is provided separately from a piano body 103 and is housed in a cabinet case 107 integrally with an operation device 105. And the piano body 1
03 is known to have a structure connected by a cable 109 (Japanese Patent Publication No. 3-6948).

[0003]

[Problems to be Solved by the Invention] However, in the conventional grand type automatic performance piano having such a structure,
There were the following drawbacks. Since the power supply device 101 is provided separately from the piano body 103 and is arranged side by side with the piano body 103, the power supply device 101 cannot be exposed, and it is necessary to create the cabinet 107. Therefore, there is a problem that the manufacturing cost is increased.

Further, even if the power supply device 101 is housed in the cabinet 107, since the cabinets 107 are arranged side by side outside the piano body 103, there is a problem that the original aesthetic appearance of the piano is impaired. Further, there is also a problem that an extra space for arranging the cabinet 107 is required.

Therefore, the present invention does not increase the cost of manufacturing a cabinet or the like for the power supply device,
It was completed for the purpose of providing a grand type automatic performance piano that does not damage the original appearance of the piano and does not require extra space.

[0006]

The grand type automatic playing piano of the present invention, which has been made to achieve the above object, electrically drives and controls the keys of the piano based on the performance information to generate musical tones. In a grand-type automatic playing piano that performs automatic performance, a power supply device is configured separately from an operating device, and the power supply device is provided in an inner space surrounded by a pillar and a side plate of the piano body, the pillar side surface or side wall inner surface. It is fixed to.

According to the grand type automatic performance piano of the present invention, by adopting the above-mentioned configuration, it is not necessary to place the power supply device outside the piano body, and the original appearance of the piano is not impaired. Further, according to the above arrangement, since the piano body is blindfolded, it is not necessary to manufacture a dedicated cabinet. And no extra space is needed beyond the space occupied by the piano itself.

The power supply device may be fixed to the side surface of the column or the inner surface of the side wall not directly, but by interposing a support member, a vibration-proof sheet or the like.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway side view of a piano body 3 in a grand type automatic playing piano 1 of the embodiment. Further, FIG. 2 is a bottom view (legs are omitted) viewed from the lower side. In the grand type automatic playing piano 1 of the embodiment, the power supply device 5 includes the columns 7 to 9 and the side plate 1.
In the internal space of the piano body 3 surrounded by 1, the side of one of the columns 8 is fixed as a fixing base with a mounting screw or the like. The operation device 13 is a compact device in which a display device, operation switches, a floppy disk driver, and the like are integrally assembled in a case, and is configured separately from the power supply device 5 and placed on the large roof 15 of the piano body 3. It was configured to do. It should be noted that it can be installed anywhere within the reach of the cable 17 connected to the power supply device 5.

Details of the power supply device 5 are shown in FIG. Note that FIG. 3 is an enlarged view of the periphery of the power supply device 5 in FIG.
As shown in the figure, the power supply device 5 is provided on the chassis plate 21 with a transformer 25 and a capacitor 27 for converting a household power supply with an AC voltage of 100 V supplied from an AC cord 23 into a predetermined voltage. Circuit board 29 for receiving a predetermined power source and generating a predetermined power source for supplying power to a power receiving unit such as a key driving device, a key press detecting / storing device or an operating device 13.
And a component such as a heat sink 31 for radiating heat from the circuit section is assembled.

The power supply device 5 configured as described above is fixedly housed in the space surrounded by the two columns 8 and 9 and the side plate 11 by using one of the columns 8 as a mounting wall and a mounting screw 33.
Then, after taking out the power supply cable 17 that supplies power to each power receiving unit from the fixedly housed power supply device 5, the power supply device 5 is covered with a cover 35 made of a perforated iron plate, etc. It is fixed at 37 for easy protection.

With the above-described structure, according to the grand type automatic performance piano 1 of this embodiment, it is not necessary to place the power supply device 5 outside the piano body, and the original appearance of the piano is not impaired. Further, according to the above arrangement, since the side plate 11 of the piano body 3 is blinded, it is not necessary to manufacture a dedicated cabinet, and the manufacturing cost does not increase. No extra space is needed beyond the space occupied by the piano body 3.

Such operations and effects are made possible by making the power supply device 5 separate from the operating device 13 as a premise. On the contrary, this also makes it possible to make the operating device 13 compact, and has the effect of improving the degree of freedom in installing the operating device 13. Since the operating device 13 has become compact and the degree of freedom in arrangement has increased,
The operability of various switch operations when performing automatic performance and manual performance at the same time is also improved.

Further, the power supply device 5 is constructed by assembling the components 25 such as the transformer 25, the capacitor 27, the circuit board 29, and the heat sink 31 on the chassis 21, so that the support 8 can be easily attached to the side surface. is there. Further, since the bottom surface of the piano body 3 is open, the power supply device 5 can be easily and conveniently arranged even when the existing acoustic piano is modified into an automatic playing piano.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modes can be adopted without departing from the scope of the present invention. For example, in FIG.
As can be seen from the above, since many pillars are arranged in the piano body and there are a plurality of spaces formed in relation to the side plates, the installation location of the power supply device is irrespective of the position of this embodiment. It is within the scope of the present invention to install it not only on the support pillar side surface but also on the side plate and other components.

[0016]

As described above, according to the present invention, the power supply device is constructed separately from the operating device, and the power supply device is provided in the inner space of the piano body, directly on the side surface of the support pillar or on the inner surface of the side wall, or through a supporting member. The piano body plays the role of a blindfold because it is fixed. Therefore, with respect to the power supply device, it does not cause an increase in the cost of manufacturing the cabinet,
It does not spoil the original appearance of the piano and does not require extra space.

Further, since the space that originally existed as the internal space of the piano body is utilized, there is no new problem such as enlargement of the piano body, and the existing grand type acoustic piano can be converted into an automatic playing piano. Is also easy.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a grand type automatic playing piano of an embodiment.

FIG. 2 is a bottom view in which the legs of the grand type automatic playing piano of the embodiment are omitted.

FIG. 3 is an enlarged view of a power supply device portion in FIG.

FIG. 4 is a side view of a conventional grand-type automatic playing piano.

[Explanation of symbols]

1 ... Grand-type automatic playing piano, 3 ... Piano body, 5 ... Power supply device, 7-9 ... Prop, 11 ...
Side plate, 13 ... Operating device, 15 ... Large roof, 17 ...
..Cables, 21 ... chassis plates, 23 ... AC
Code, 25 ... Transformer, 27 ... Capacitor,
29 ... Circuit board, 31 ... Heat sink, 33 ...
..Mounting screws, 35 ... cover, 37 ... mounting screws

Claims (1)

[Scope of utility model registration request] 1. In a grand type automatic playing piano for automatically driving and controlling a piano key on the basis of performance information to generate a musical sound and performing an automatic performance, a power supply device is configured separately from an operating device. A grand type automatic playing piano characterized in that the power supply device is fixed to the side surface of the support pillar or the inner surface of the side wall in an internal space surrounded by the support pillars and side plates of the piano body.