JP2002162970A - Keyboard device of electronic keyboard musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard device of an electronic keyboard musical instrument which can secure a sufficient dynamic load without altering an existent layout and give an excellent touch feeling in satisfactory playing close to that of an acoustic piano. SOLUTION: This keyboard device of the electronic keyboard musical instrument is equipped with multiple keys 3 which extend in the front-rear direction and are supported rotatably a key fulcra at their center parts, multiple 1st hammers 4 which are provided behind the key fulcra 5 and above the keys 3 and rotate by being pushed up by the corresponding keys 3 as the keys 3 are pressed, and multiple 2nd hammers 12 which are provided in front of the key fulcra 5 and below the keys 3 and rotate by being pushed up by the corresponding keys 3 as the keys 3 are pressed. The 2nd hammers 22 are constituted so as to start rotating in specific timing with delay behind the 1st hammers 4 as the keys 3 are pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for an electronic keyboard instrument, such as an electronic piano, provided with a keyboard and a hammer that rotates when a key is pressed on the keyboard.

[0002]

2. Description of the Related Art FIG. 9 shows an example of a conventional keyboard device for an electronic piano. The keyboard device 51 includes a chassis 2
And a number of keys 3 (white keys 3) attached to the chassis 2
a and one black key 3b are shown), and a number of hammers 4 (only one is shown) that rotate in response to key depression of each keyboard 3 and the like. The keyboard 3 is in the front-back direction (left-right direction in the figure)
And a balance pin 5 erected on the chassis 2 at the center in a state where the balance pin 5 is arranged in the left-right direction (depth direction).
Is rotatably supported.

The hammer 4 applies a dynamic load to the keyboard 3 and is, for example, a rod-shaped hammer body 4 made of synthetic resin.
a, and a weight plate 4b (only one is shown) made of an iron plate or the like attached to the front portions of both side surfaces thereof. The hammer 4 is rotatably supported at its rear end by a hammer rail 6 connected to the rear end of the chassis 2 via a fulcrum member 6a, and its front part is connected to the rear end of the keyboard 3. It is posted.

A plurality of inverted L-shaped action ribs 7 (only one is shown) are provided on the hammer rail 6 so as to be arranged side by side in the left-right direction. A stopper rail 8 is screwed between the distal ends thereof. I have. A stopper 9 for restricting upward rotation of the hammer 4 is provided on the stopper rail 8,
A key switch 10 for detecting key press information of each keyboard 3 is attached. A control panel 11 is provided on the front side of the hammer 4 so as to cover the rear portion of the keyboard 3 and the hammer 4. The control panel 11 has a display lamp 11a and a number of tone selection buttons (not shown) arranged on the front surface thereof, and a printed board 11b arranged on the rear surface thereof in a state of being close to the hammer 4.

[0005] With the above structure, as the keyboard 3 is depressed, the hammer 4 is pushed up by the keyboard 3 and turned upward, so that touch weight is added and the turned hammer 4 is turned on. Collides with the stopper 9 to give a touch feeling similar to that of an acoustic piano.

[0006]

In an actual acoustic piano, when a key is pressed, the first peak of the dynamic load due to the weight of the keyboard appears, and then the second peak of the dynamic load due to the weight of the hammer. Appears. This is because the hammer operates with a delay due to the bending of the keyboard (bending deformation due to the key pressing load). On the other hand, in the above-mentioned conventional keyboard device 51, as shown in FIG. 10, similarly to the acoustic piano, first, the first peak due to the weight of the keyboard appears, and then the second peak due to the weight of the hammer. Although appearing, the vicinity of the hammer 4 is the printed circuit board 11 of the key switch 10 and the control panel 11.
Since b is arranged close to and it is necessary to secure a rotation space for the hammer 4, the space is limited. For this reason, the weight plate 4b cannot be made longer than a predetermined length, and as a result, a sufficient dynamic load and, therefore, a desired touch weight cannot be obtained. Alternatively, in order to solve this space problem and secure a desired dynamic load, it is necessary to fundamentally change the layout of the keyboard device 51 including the hammer 4, and in that case,
This leads to a significant increase in manufacturing costs.

In an actual acoustic piano, the load of the damper acts after the hammer.
When this dynamic load is superimposed, there is a characteristic that the peak of the dynamic load of the hammer shifts backward. On the other hand, the conventional keyboard device 51 does not have a structure for adding a load to the hammer 4 with a delay, so that the peak of the dynamic load of the hammer 4 occurs earlier, and as a result, a touch feeling that is hard to play is obtained. I will.

The present invention has been made in order to solve such a problem, and can secure a sufficient dynamic load without changing an existing layout, and has a resilient feel similar to an acoustic piano. It is an object of the present invention to provide a keyboard device for an electronic keyboard instrument that can provide a good touch feeling.

[0009]

In order to achieve this object, a keyboard device for an electronic keyboard instrument according to the present invention comprises a plurality of keyboards extending in the front-rear direction and rotatably supported at the center of the keyboard at a central portion thereof. A plurality of first hammers provided behind the keyboard fulcrum and above the keyboard and rotated by being pushed up by the keyboard when a corresponding key is depressed, and a keyboard provided forward of the keyboard fulcrum and And a plurality of second hammers that are rotated by being pushed up by the keyboard when a corresponding key is pressed.

According to the keyboard device of the electronic keyboard instrument, the first hammer is rotated by being pushed up on the keyboard, and the second hammer is turned by being pushed down on the keyboard. Move. That is, since the weight of the second hammer is added to the dynamic load of the keyboard in addition to the weight of the first hammer, a sufficient dynamic load can be secured, and therefore, a desired touch weight approximate to that of an acoustic piano Can be obtained.

[0011] The first hammer is disposed behind the fulcrum of the keyboard and above the keyboard.
Since it is arranged similarly to the above-mentioned hammer of the conventional keyboard device, the existing keyboard device can be used as it is. On the other hand, the second hammer is located forward of the keyboard fulcrum and below the keyboard, and this part is closer to the space than the part where the hammer is provided because no other parts are close to each other. I can afford. As described above, the keyboard device of the present invention can be configured by simply adding the second hammer without changing the layout of the existing keyboard device and utilizing a relatively large space, and is therefore inexpensive. can do.

[0012] In this case, it is preferable that the second hammer is configured to start rotating at a predetermined timing later than the first hammer when the keyboard is depressed.

In this configuration, the second hammer rotates at a predetermined timing later than the first hammer in accordance with the key depression of the keyboard, so that the peak of the dynamic load of the two hammers is shifted backward. It is possible to obtain a good touch feeling with a crisp feel, which is closer to that of an acoustic piano.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 2 show the keyboard device of the electronic piano according to the first embodiment of the present invention in a key released state and a key pressed state, respectively. Note that the keyboard device 1 is basically the same as the conventional keyboard device 51 described above, except that a second hammer 12 described later is added. Will be described with the same reference numerals.

This keyboard device 1 is similar to the keyboard device 51,
A chassis 2, a number of keyboards 3 attached to the chassis 2 in a state of being arranged in the left-right direction, and a number of first hammers 4 and second hammers 12 that rotate in response to key presses of the respective keys 3.
(Only one of each is shown).

The chassis 2 is formed by assembling a steel plate or the like that has been punched and bent by a press into a cross-girder shape, and is horizontally screwed to the shelf board 15. Chassis 2
A large number of balance pins 5 (key fulcrums) are erected in the center in the front-rear direction (only one is shown).

The keyboard 3 comprises a white key 3a and a black key 3b.
Each is composed of a wooden keyboard main body 3c having a rectangular cross section, and a synthetic resin keyboard cover 3d adhered to a front portion of the upper surface thereof. A balance pin hole 3 is provided at the center of the keyboard body 3c.
e is formed, and the keyboard 3 has the balance pin hole 3
e, it is rotatably supported by the balance pin 5.

The first hammer 4 has basically the same configuration as the hammer 4 of the conventional keyboard device 51, is provided for each keyboard 3, and has a rectangular cross-section made of a synthetic resin-made hammer main body 4a. And a weight plate 4b (only one is shown) made of an iron plate or the like attached to the front portions of both side surfaces thereof. The first hammer 4 has a rear end portion of the hammer main body 4a,
By being engaged with a fulcrum member 6a attached to the hammer rail 6, it is rotatably supported by the hammer rail 6. An adjusting screw 4c is attached to the rear of the lower surface of the hammer main body 4a so as to be able to move forward and backward. The first hammer 4 is mounted on the rear end of the upper surface of the corresponding keyboard 3 via the adjusting screw 4c. ing.

A plurality of action ribs 7 (only one is shown) are screwed to the hammer rail 6 at predetermined intervals in the left-right direction, and a stopper rail 8 is screwed between the distal ends of the action ribs 7. I have. These hammer rail 6, action rib 7, and stopper rail 8
Are made of a pressed iron plate or the like. The stopper rail 8 is provided with a stopper 9 for regulating the upward rotation of the first hammer 4 and a key switch 10 for detecting key press information of each keyboard 3.
The stopper 9 extends in the left-right direction so as to extend over all the first hammers 4, and is made of urethane foam or the like. The key switch 10 includes a printed circuit board 10a,
A switch body 10b composed of a rubber switch attached to the keyboard 3 for each keyboard 3 is mounted on the printed board 10a, and is attached to the stopper rail 8 with the rear end of the printed board 10a inserted into the fulcrum member 6a. .

A control panel 11 is provided on the front side of the first hammer 4 so as to cover the rear portion of the keyboard 3 and the first hammer 4. On the front surface of the control panel 11, a display lamp 11a indicating the operation state of the electronic piano and a number of tone selection buttons (not shown) are arranged, and on the back side, these display lamps and tone selection buttons are provided. Printed circuit board 1 for inputting and outputting signals
1 b is arranged in a state of being close to the first hammer 4. The above configuration is basically the same as the conventional keyboard device 51 shown in FIG.

In addition, in the keyboard device 1 of the present embodiment, a second hammer 12 is further provided. As shown in FIG. 3, the second hammer 12 is, for example, a plate-shaped synthetic resin hammer body 12a having a predetermined shape.
And a weight plate 12b (only one is shown) made of an iron plate or the like attached to the lower part of both side surfaces thereof. Pin-shaped projections 12c, 12c (only one is shown) projecting from both sides are integrally formed at the center of the hammer main body 12a, and a portion above the projection 12c of the hammer main body 12a is a keyboard contact portion. 12d, and the rear portion of the upper surface is a stopper contact portion 12e.

On the other hand, a support member 13 for supporting the second hammer 12 is provided for each keyboard 3 at a position forward of the balance pin 5 and below the keyboard 3 on the chassis 2. The support member 13 is made of a synthetic resin or the like, and is attached to the chassis 2 through an attachment hole 2a formed in the chassis 2. A flat T-shaped insertion hole 13 a is formed in the support member 13 so as to penetrate in the vertical direction, and the protrusion 12 of the second hammer 12 is formed.
Support grooves 13b, 13b corresponding to c, 12c are formed. A second hammer 1 is provided on the lower surface of the chassis 2.
A stopper 14 made of urethane foam or the like is attached to a position corresponding to the second stopper contact portion 12e.

The second hammer 12 is provided with the projection 1
2c, 12c, the supporting member 13 attached as described above
After being inserted from below into the insertion hole 13a, the support groove 13b,
The support member 13 is rotatably supported by engaging with the support member 13b. In this state, the second hammer 1
A second keyboard contact portion 12d protrudes upward from the chassis 2, and the lower surface of the keyboard 3 is in contact with the keyboard contact portion 12d.

According to the keyboard device 1 having the above configuration, the keyboard 3
As the key is pressed, the first hammer 4 is pushed up at the rear end of the keyboard 3 as shown in FIG.
Rotate upwards. At the same time, the second hammer 12 is pressed down on the lower surface of the keyboard 3 via the keyboard abutting portion 12d, whereby the second hammer 12 rotates downward about the support groove 13b of the support member 13. In this case, the second
Since the hammer 12 is pressed by the keyboard 3 at a portion closer to the balance pin 5 of the keyboard 3 than the first hammer 4, that is, at a portion where the flexibility of the keyboard 3 is smaller, FIG.
As shown in the figure, the load starts to act at a timing earlier than the first hammer 4.

As described above, in the keyboard device 2 of this embodiment, the weight of the second hammer 12 is added to the dynamic load of the keyboard 3 in addition to the weight of the first hammer 4.
As is clear from the comparison between FIG. 10 and FIG. 10, the dynamic load, which tends to be insufficient with the first hammer 4 alone, can be sufficiently secured, and therefore, a desired touch weight similar to that of an acoustic piano can be obtained. The first hammer 4 that has been rotated contacts the stopper 9, and the second hammer 12 contacts the stopper 14 via the stopper abutting portion 12 e, thereby restricting the rotation. A touch feeling similar to that of a piano is provided.

The first hammer 4 has the same configuration and arrangement as the hammer 4 of the conventional keyboard device 51, as described above, and the second hammer 12 has no other components close to each other. It is provided in the lower part of the keyboard 3 where there is relatively room for space. Therefore, the keyboard device 1 of the present embodiment utilizes a relatively extra space without changing the layout of the existing keyboard device 51, and
It can be configured simply by adding the second hammer 12, and can be realized at low cost.

FIGS. 5 and 6 show a keyboard device according to a second embodiment of the present invention. As shown in both figures, this keyboard device 21 is different from the keyboard device 1 of the first embodiment,
The configuration of the second hammer is different. In particular,
The keyboard contact portion 22d of the second hammer 22 is shorter than the keyboard contact portion 12d of the second hammer 12 of the first embodiment, and projects at a gentler angle with respect to the hammer body 12a. In addition, a stopper 23 is provided below the chassis 2 at a position in front of the second hammer 22. As shown in FIG. 6B, the stopper 23 has a “U” -shaped cross section that opens rearward, and has
A cushion 24 made of felt or the like is attached. When the front surface of the second hammer 22 is in contact with the cushion 24 in the key release state, the second hammer 22 is held at the angle shown in FIG. The lower surface of the keyboard 3 is opposed to the keyboard 3 at a predetermined interval G (see FIG. 5). Other configurations are the same as the keyboard device 1 of the first embodiment.

Accordingly, in this keyboard device 21, the first hammer 4 rotates upward in the same manner as in the first embodiment in accordance with the depression of the keyboard 3. On the other hand, the second hammer 22 is rotated at a predetermined timing later than the first hammer 4 by maintaining a predetermined interval G between the keyboard contact portion 22d and the keyboard 3 in the key release state. Start moving. This allows
As shown by the solid line in FIG. 7, as with the acoustic piano, two peaks of the dynamic load appear, and the peak of the dynamic load of the two hammers 4 and 22 is shifted backward compared to the first embodiment. Thus, it is possible to obtain a good touch feeling with a firm response that reflects the load of the damper of the acoustic piano.

The two peaks of the dynamic load depend on the relationship between the weights of the first and second hammers 4 and 22 and the setting of the distance G between the second hammer 22 and the keyboard 3 in the key released state. Can be obtained at any desired timing, so that a more similar touch feeling can be obtained with an acoustic piano. For example,
FIG. 8 shows that the gap G between the second hammer 22 and the keyboard 3 in the key release state is made larger, and the two peaks of the dynamic load are further shifted backward to obtain a more firm touch feeling. Things.

The present invention is not limited to the embodiments described above, but can be implemented in various modes.
For example, the shape, material, arrangement, and the like of the second hammer 12 described in the embodiment are merely examples, and can be appropriately changed within the scope of the present invention. In the embodiment, the second hammer 1 is added to the existing keyboard device 51.
2 is added, but the keyboard device may be designed from the beginning so as to obtain the best touch weight and layout, on the assumption that the first and second hammers according to the present invention are provided. Of course. Further, the embodiment is an example in which the present invention is applied to an electronic piano, but the present invention is not limited to this, and can be similarly applied to other types of electronic keyboard instruments having a hammer.

[0031]

As described above, the keyboard apparatus for an electronic keyboard instrument according to the present invention can secure a sufficient dynamic load without changing the existing layout, and has a good playing feel similar to an acoustic piano. It has an effect that a touch feeling can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a keyboard device of an electronic piano according to a first embodiment of the present invention in a key released state.

FIG. 2 is a side view of the keyboard device of FIG. 1 in a key pressed state.

3A is a plan view of a support member of a second hammer, and FIG. 3B is a side view showing a mounting state of a second hammer of the keyboard device of FIG. 1;

FIG. 4 is a diagram showing dynamic load characteristics obtained by the keyboard device of FIG. 1;

FIG. 5 is a side view of a keyboard device of an electronic piano in a key released state according to a second embodiment of the present invention.

6A is a side view of the keyboard device of FIG. 5, showing a state of attachment of a second hammer, and FIG. 6B is a cross-sectional view taken along a line Vb-Vb thereof.

FIG. 7 is a view showing dynamic load characteristics obtained by the keyboard device of FIG. 5;

FIG. 8 is a diagram showing dynamic load characteristics obtained when the distance between the keyboard and the second hammer is increased in the keyboard device of FIG. 5;

FIG. 9 is a side view of a conventional keyboard device for an electronic piano.

FIG. 10 is a diagram showing dynamic load characteristics obtained by a conventional keyboard device.

[Explanation of symbols]

 Reference Signs List 1 keyboard device 3 keyboard 4 first hammer 5 balance pin (key fulcrum) 12 second hammer 21 keyboard device 22 second hammer

Claims (2)

[Claims] A plurality of keys extending in the front-rear direction and rotatably supported at the center of the keyboard at a central portion thereof; and a plurality of keys provided at a position behind the keyboard fulcrum and above the keyboard. A plurality of first hammers, which are rotated by being pushed up by the keyboard as the keys are depressed, are provided at a position in front of the keyboard fulcrum and below the keys, and correspond to key depressions of the keys. And a plurality of second hammers that are rotated by being pushed up by the keyboard. A keyboard device for an electronic keyboard instrument. 2. The apparatus according to claim 1, wherein the second hammer is configured to start rotating at a predetermined timing later than the first hammer when the keyboard is depressed. A keyboard device for an electronic keyboard instrument according to claim 1.