JPS5924074Y2 - Sound emitting device for playing sound on a vertical piano - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sound emitting device for emitting performance sounds directly to the outside of a vertical piano.

When a grand piano is played, the roof panel is wide open upwards and the playing sound is emitted directly to the outside, so that there is no muffled sound, but vertical pianos are generally played in a sealed state, so this In comparison, the sound of the performance tends to be trapped within the instrument body, resulting in a lack of strength in the sound quality.

Therefore, this invention was devised to solve the above-mentioned drawbacks.The upper roof, lower pressure plate, and upper and lower front plates are opened and closed in conjunction with the opening and closing operations of the keyboard lid, so that the sound of the performance is absorbed into the interior when playing. To provide a sound emitting device that transmits sound to the outside without being muffled.

To explain the illustrated embodiment, FIGS. 1 and 3 show the appearance of the piano body A when not in use and the outline of the piano body A when the left main plate 1 and the armrest 2 are removed.
As shown in Fig. 4, bearings 4a with cushioning material pasted on the groove-shaped surface are provided on both sides of the front base 4, which is installed at the front end of the bottom plate 3 in the width direction of the main body A (in the figure, one side is shown for convenience). The short shafts 5a of the retainers are rotatably fitted to the bearings 4a, which are attached to both sides of the lower end of the back surface of the lower front plate 5. Block 5 on both sides
b is fixed with a screw, and the front end of a child interlocking rod 6b is rotatably supported on one side of this block 5b, and the rear end of the child interlocking rod 6b is attached to a base 1a on the inner surface of the main plate 1. The upper end of the vertical interlocking rod 6a is connected to the lower end of the vertical interlocking rod 6a, which is rotatably supported above, and the rear end of the upward moving rod 6C is connected to the upper end of the vertical interlocking rod 6a. The hook formed on the back side of the lower pressure plate 7 is engaged with the metal plate 7b.

The lower pressure plate 7 is rotatably supported by a bearing 1C fixed to the inner surface of the main plate 1 by pins 7C provided at both ends of the lower surface of the bent portion, and also has a rear upright portion 7a of the lower pressure plate 7.
Hinge-shaped bearings 7d are installed vertically on both sides of the back side of the upper front plate 8, and inverted-shaped pins 9 are inserted between them and hinge-shaped bearings 8a installed horizontally on both sides of the lower end of the upper front plate 8. The pressure plate 7 and the upper front plate 8 are connected in a flexible manner.

As shown in FIG. 5, hinge-shaped bearings 8b are installed laterally on both sides of the upper end of the back surface of the upper front plate 8, and the upright portion of the inverted-shaped pin 10 inserted therein is attached to the upper end of the back surface of the upper front plate 8. The forked portion 11 is rotatably pivoted to the block 1d on the inner surface of the main plate 1. Normally, the forked portion 11 is fixed to the inner surface of the main plate 1 and abuts against the stopper 12, and the upper and lower parts are connected to each other. The plate 8 is held upright.

In addition, a pair of hinge-shaped bearings 8C (only one side is shown in the figure) is installed vertically in the center of the surface of the upper front plate 8, as shown in FIG. Similarly hinge-shaped bearings 13a are installed horizontally on both sides of the upper part of the stand 13, and an inverted-shaped pin 1 is attached to both bearings 8c and 13a.
4 is inserted, and the music stand 13 is connected to the upper front plate 8 so as to be vertically and tiltably.

As shown in FIG. 3, the roof plate 15 is hinged to the upper end surface of a column 16 erected on the rear side of the piano body A so as to be openable and closable.

Reference numeral 17 denotes a keyboard lid, which is provided with short shafts 17a at both rear ends as shown in FIG. Operating pins 17b are embedded in both sides of the edge so as to be able to rise and fall freely.

Further, as shown in FIGS. 1 and 8, a stopper 2b for holding the keyboard lid 17 in an open state is embedded in the upper inner surface of the arm 2 in a freely undulating manner.

In addition, in the figure, 18 is a shelf board, and 19 is a keyboard.

Furthermore, in the above example, the interlocking rods 6a, 6b, 6C and the operating pin 17b are provided on both sides.
, for small ones, it may be on one side.

Based on the above-described structure, the piano main body A is maintained in a sealed state as shown in FIGS. 1 and 3 when not in use.

Therefore, when playing, if the operating pin 17b on the keyboard lid 17 is raised and the keyboard lid 17 is opened upward as shown in FIG. 9, the lower end surface of the flat roof 7 will be pushed backward by the upper end of the operating pin 17b. As a result, the flat roof 7 is rotated clockwise, and the upper front plate 8, which is rotatably connected to the rear end by a pin 9, is moved upward by the engagement of the pin 10 and the bifurcated portion 11 in the upper part. At the same time, the lower end part is inclined so as to project forward, and as the upper front plate 8 rises, the front edge of the roof plate 15 is pushed up and opened.

In addition, as the flat roof 7 rotates clockwise, the hook 7b on the back side of the lower end pushes the upward moving rod 6C backward, the vertical interlocking rod 6a rotates counterclockwise, and its lower end becomes the child interlocking rod. Rod 6
Since b protrudes forward, the lower front plate 5 connected thereto opens by tilting forward about the short axis 5a at the lower end.

Then, the stopper 2b provided on the inner surface of the arm 2 is brought down to engage the upright surface of the keyboard lid 17, and the music stand 13 is
When the piano main body A is tilted so that its lower end rests on the upper end of the upright keyboard lid 17, the piano main body A has an upper roof 15, a flat roof 7, an upper front plate 8, and a lower front plate as shown in FIGS. 2 and 9. 5 is held in an open state, and the inside of the main body A communicates with the outside, so that the performance sound is transmitted to the outside without being trapped inside.

Then, at the end of the performance, the stopper 2b on the inside of the arm 2 is
retract it to disengage it from the keyboard lid 17, and also remove the operating pin 1.
7b and close the keyboard lid 17, the lock between the flat roof 7 and the keyboard 17 will be released, and the upper roof 15 and the upper front plate 8 will return to their original state due to their own weight, and the flat roof will return to its original state. 7 also rotates counterclockwise from the state shown in FIG. will be pulled backwards and stand up.

After that, the piano main body A returns to the state shown in FIGS. 1 and 3 when not in use.

As described above, in this invention, the upper roof, flat roof, upper front plate, and lower front plate, which are the components of the piano body, can be opened and closed in conjunction with the opening and closing operation of the keyboard lid, so when playing, the keyboard lid can be opened and closed. Just by opening the piano, each of the above-mentioned components is automatically maintained in an open state, releasing the interior of the piano body, and the performance sound is transmitted directly to the outside without being trapped inside, producing a powerful performance similar to that of a grand piano. Moreover, when the keyboard lid is closed, each member immediately returns to its original sealed state, preventing dust from entering and damaging the instrument body.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a perspective view of the piano body when not in use. Figure 2 is a perspective view of the piano body in use. FIG. 3 is a sectional view taken from the XX line direction of FIG. 1. FIG. 4 is a partial perspective view showing how the upper front plate, the flat roof and the lower front plate are connected. FIG. 5 is a partial perspective view showing a state in which the upper front plate and the main plate are connected. FIG. 6 is a partial perspective view showing the state in which the upper front plate and the music stand are connected, and FIG. 7 is a partial perspective view showing the state in which the keyboard lid is supported. FIG. 8 is a partial perspective view showing the keyboard lid in an open state. FIG. 9 is a sectional view showing the opened state as seen from the YY line direction of FIG. 2. In the figure, 1 is the main plate, 2 is the arm, 2b is the stopper 3 is the bottom plate, 4 is the front base, 5 is the lower front plate, 6a, 6b. 6C is the interlocking rod, 7 is the lower roof, 8 is the upper front plate, 9, 10゜1
4 is an inverted pin, 11 is a forked rod, 13 is a music stand, 15
16 is a roof plate, 16 is a support column, 17 is a keyboard lid, and 17b is an operating pin.

Claims (1)

[Scope of utility model registration request] The lower end of the lower front plate 5 is rotatably connected to the front upper stand 4 installed on the front end of the bottom plate 3, and a lower pressure plate 7 is rotatably supported on the upper end of the lower front plate 5 and the inner surface of the main plate 1. are rotatably connected to the front lower end portion of the
The rear end of the lower pressure plate 7 and the lower end of the upper front plate 8 which is vertically and tiltably connected to the upper inner surface of the main plate 1 are connected in a bendable manner, and the rear end of the roof plate 15 is connected to the upper end of the support column 16. On the surface of the keyboard lid 17, which is attached to the keyboard so that it can be opened and closed freely, and rotatably supported on the upper inner surface of the arm 2, there is an operating pin 17b for rotating the lower pressure plate 7 when the keyboard lid 17 is opened. The above-mentioned keyboard cover 1 is buried in the upper part of the upper part of the arm 2.
A sound emitting device for playing sound in a vertical piano, in which a stopper 2b is embedded in a freely undulating manner in order to hold the piano 7 in an open state.