JPH0594888U - Electronic musical instrument keyboard device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a keyboard device for an electronic musical instrument, which can provide a good key touch feeling very close to that of an acoustic piano and can improve the repeated hitting characteristic. A key 1 rotatably attached to a keyboard chassis 3, a hammer 10 rotatably attached to the keyboard chassis 3, and a key 10 rotatably attached to the key 1 and abutting on the hammer 10, Hammer 1 when pressing 1
In a keyboard device of an electronic musical instrument, which is equipped with a jack 13 configured to push 0 to rotate and to be detached from the hammer 10 during rotation of the hammer 10, during rotation of the hammer 10 in a return direction. The key 1 is provided with a catcher 6 for catching the hammer 10 on the returning key 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a keyboard device for an electronic musical instrument such as an electronic piano, and more particularly, to a keyboard device for an electronic musical instrument that includes a hammer that works with a key to obtain a key touch feeling similar to that of an acoustic piano.

[0002]

[Prior Art]

 As a conventional keyboard device of this type, for example, one disclosed in Japanese Patent Laid-Open No. 63-125992 is known. As shown in FIG. 7, this keyboard device is formed on the keyboard chassis 51 and a key 53 that is engaged with a key fulcrum 52 formed on the keyboard chassis 51 from the front and is rotatably supported by the key fulcrum 52. A hammer 56 that is engaged with the hammer fulcrum 54 from the rear and is rotatably supported by the hammer fulcrum 54, and the abutting portion 55 is arranged so as to abut the lower surface of the key 53; A leaf spring 57 is provided so as to be stretched between the hammer 56 and the base of the hammer 56. The leaf spring 57 presses the key 53 and the hammer 56 against the key fulcrum 52 and the hammer fulcrum 54, respectively, and urges the key 53 in the key releasing direction and the hammer 56 in the returning direction. With such a configuration, when the key 53 is pressed, the hammer 56 rotates in conjunction with the key 53 when the key 53 pushes the contact portion 55 of the hammer 56, and inertia occurs during this rotation. Thus, the key 53 is separated from the key 53, and thereafter, the leaf spring 57 is rotated by the elastic force in the opposite direction to return to the original position together with the key 53.

As another keyboard device with a hammer, for example, one disclosed in Japanese Patent Laid-Open No. 63-155095 is known. As shown in FIGS. 8 and 9, this keyboard device is such that a hammer 62 is rotated via a jack 63 when the key 61 is pressed. That is, in this keyboard device, the jack 63 rotatably attached to the key 61 presses the jack abutting portion 64 of the hammer 62 by pressing the key of the key 61 to rotate the hammer 62, and then, The jack stopper 65 of the rotating hammer 62 hits the side surface of the jack 63, and by removing the jack 63 from the hammer 62, the player is given a let-off feeling, and a key touch feeling similar to that of an acoustic piano is provided. can get. Then, the hammer 62 collides with the upper stopper 66 and returns to its original position by its own weight. When the key 61 is released, the key 61 is urged by the coil spring 67, and the jack 63 is urged by the leaf spring 68 to ride on the jack abutting portion 64 of the hammer 62. Return to.

[0004]

[Problems to be solved by the device]

 However, in the keyboard device shown in FIG. 7, the abutting portion 55 of the hammer 56 that rotates in the returning direction directly collides with the key 53 from below in a state where the key device is separated from the key 53 after the key is pressed. The vibration is transmitted to the fingertips of the performer, which has the disadvantage that the key touch feeling is adversely affected.

Further, in the keyboard device shown in FIGS. 8 and 9, the hammer 62 is rotated via the jack 63 so that the returning hammer 62 does not directly collide with the key 61. Therefore, the above-mentioned drawbacks of the keyboard device of FIG. 7 are eliminated. However, in this keyboard device, in order to rotate the hammer 62 by pressing the key 61, the lower end of the jack 63 must be in contact with the jack contact portion 64 of the hammer 62. There is a drawback in that the hammer 62 cannot be rotated when the ball 61 is continuously struck at a fine pitch, and the struck characteristic is not good.

The present invention has been made in order to solve such a problem, and provides an electronic musical instrument that can obtain a good key touch feeling extremely close to that of an acoustic piano and can improve the repeated hitting characteristic. It is intended to provide a keyboard device.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a key rotatably attached to a keyboard chassis, a hammer rotatably attached to a keyboard chassis, and a key rotatably attached to and abutting a hammer. In a keyboard device of an electronic musical instrument equipped with a jack configured to push and rotate the hammer when the key is pressed, and to be detached from the hammer during the rotation of the hammer, the hammer is rotated in the return direction. It is characterized in that the key is provided with a catcher that catches the hammer while the hammer is returning during operation.

In this case, the catcher is preferably formed integrally with the key.

[0009]

[Action]

 According to the keyboard device of this electronic musical instrument, when the key is pressed, the jack presses the hammer to rotate it, and during the key pressing, the jack comes off the hammer, giving a feeling of let-off. The key touch feeling is very close. In addition, since the catcher provided on the key catches the hammer that returns after pressing the key on the returning key, the hammer does not bounce off the key, and the vibration of the key due to the collision of the hammer is suppressed, It does not adversely affect the touch feeling. Furthermore, the hammer being returned is caught by the key through the catcher, and the jack will return to the initial position and come into contact with the hammer during the return of the key. Therefore, it is possible to repeatedly hit with the rotation of the hammer.

Further, in the keyboard device according to the second aspect, since the catcher is formed integrally with the key, the position accuracy of the catcher is improved, and the catcher can be easily formed at low cost.

[0011]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a keyboard device according to an embodiment of the present invention in a released state. As shown in the figure, this keyboard device includes a white key 1 swingably supported by a keyboard chassis 3, a hammer 10 swingably supported by the keyboard chassis 3, a white key 1 and a hammer 10. And a jack 13 rotatably attached to the white key 1. When the white key 1 is pressed, the jack 13 descends together with the white key 1 and the hammer 10 moves. Is designed to rotate. Further, a catcher 6 is provided on the lower surface of the white key 1, and the catcher 6 is adapted to lock the hammer 10 which returns after rotating.

The white key 1 is rotatably supported on the keyboard chassis 3 by using a bearing recess 2 at the rear end of the white key 1 as a key fulcrum 3 a by engaging the recess 2 for bearings with the hole edge of the keyboard chassis 3 from the front. Has been done. The white key 1 has a U-shaped cross section with an open lower end, and as shown in FIG. 2, bearing recesses 5 are formed at the lower edges of both side walls 4 thereof. A key switch 7 which is operated by an actuator (not shown) of the white key 1 is attached to the keyboard chassis 3.

The catcher 6 is located between the key fulcrum 3 a and the hammer fulcrum 8 at approximately the center in the front-rear direction of the white key 1, and projects from the bottom wall of the white key 1 and is formed integrally therewith. .. The rear surface of the catcher 6 is perpendicular to the bottom wall of the white key 1, while the front surface of the catcher 6 is a catch portion 6a which is slanted rearward and downward. The rear surface of the portion 10b is slidably contacted and locked.

As shown in FIG. 2, the jack 13 includes a pair of left and right support shafts 14 (only one is shown) formed on both sides of the jack 13, which are fitted into the bearing recesses 5 of the white key 1. The white key 1 is rotatably supported, and one end of the cushion material 12 affixed thereto abuts the white key 1. The jack 13 is formed with a pressing portion 13a for pressing the hammer 10 so as to project.

The hammer 10 is rotatable in the keyboard chassis 3 by engaging the bearing recess 11 shown in FIG. 3 with the cylindrical hammer fulcrum 8 fitted into the hole edge of the keyboard chassis 3 from the rear. The hammer fulcrum 8 is supported on the hammer fulcrum 8 so that its center of gravity is located in front of the hammer fulcrum 8. At the rear end of the hammer 10, there is formed a catcher locking portion 10b which is in sliding contact with the catch portion 6a of the catcher 6, and a cushion material 10c is attached to the surface thereof. Further, between the hammer fulcrum 8 of the hammer 10 and the catcher locking portion 10a, a jack contact portion 10a with which the pressing portion 13a of the jack 13 abuts is formed, and one end of the hammer 10 has a weight. No. 9 is fixed.

A leaf spring 18 is passed through the hollow portion 17 of the hammer 10, and each end of the leaf spring 18 is locked in a locking recess 15 of the jack 13 and a locking recess 16 of the hammer 10. .. Due to the elastic force of the leaf spring 18, the support shaft 14 of the jack 13 presses the bearing recess 5 and the bearing recess 11 of the hammer 10 presses the hammer fulcrum 8, respectively. And the keyboard chassis 3 are rotatably supported without rattling. In addition, the elastic force of the leaf spring 18 presses the bottom wall of the white key 1 through one end of the jack 13 to return it to the initial position, that is, the key release position, and acts on the hammer 10 to reduce its own weight. At the same time, the hammer 10 is returned to the position shown in FIG.

Reference numeral 19 in FIG. 1 is a load adjusting spring for the white key 1, and 20 is a jack stopper, 21 provided on the keyboard chassis 3 so that the jack 13 may come into contact with the white key 1 during rotation of the white key 1. Is a key stopper, and 22 is a hammer stopper.

Next, the operation of the keyboard device of this embodiment will be described. When the white key 1 in the released state shown in FIG. 1 is pushed, the jack 13 descends together with the white key 1, and the pressing portion 13a pushes the jack abutting portion 10a of the hammer 10 to move the hammer 10 to the timepiece of FIG. Rotate in the direction. As shown in FIG. 4, when the jack 13 comes into contact with the jack stopper 20, the jack 13 rotates counterclockwise with respect to the white key 1, and the pressing portion 13 a causes the jack abutting portion 10 a of the hammer 10. Get out of. At this time, the player is given a feeling of letting off the keystroke operation, and is not provided with a feeling of let-off except when the keystroke is weak.

Further, as shown in FIG. 5, since the hammer 10 continues to rotate in the clockwise direction by inertia even after the jack 13 is disengaged, a touch like a hammer of an acoustic piano striking a string can be obtained. After stopping the rotation, the hammer 10 rotates in the opposite direction (counterclockwise) by its own weight, and during this rotation, the catcher locking portion 10b slides on the catch portion 6a of the catcher 6, It is caught by the white key 1 (see Fig. 6). Thereby, the hammer 10 is prevented from bouncing against the white key 1, and the vibration of the white key 1 is suppressed. Also, if the white key 1 is moved in the return direction from the state where the hammer 10 has been caught by the catcher 6 by the catcher 6, the jack 13 will return and the hammer 10 will return before the hammer 10 returns to the initial position. Since the white key 1 comes into contact with the jack contact portion 10a, the hammer 10 can be rotated by pressing the key again after returning the white key 1 in the returning direction a little. When the finger is released from the white key 1, the elastic force of the leaf spring 18 causes the jack 13 and the white key 1 to return to the key releasing position shown in FIG. 1, and the hammer 10 also comes off the catcher 6 and is shown in FIG. Return to the key release position.

As described above, in the keyboard apparatus of the present embodiment, when the key is pressed, the jack 13 presses the hammer 10 to rotate, and the jack 13 is disengaged from the hammer 10 during the key pressing. Since a feeling of let-off is given, a key touch feeling very close to that of acoustic piano is obtained. Further, since the catcher 6 formed on the white key 1 catches the returning hammer 10 on the white key 1, the hammer 10 is prevented from bouncing from the white key 1, and the white key 1 due to the collision of the hammer 10 Vibration is suppressed and the key touch feeling is not adversely affected. In this case, the catch 6a of the catcher 6 and the catcher sliding contact part 10b of the hammer 10 are in sliding contact with each other, and the vibrations generated thereby are dispersed in the front-back direction, so that the fingertips of the performer feel almost no vibration. You can prevent it.

Further, by locking the hammer 10 which is being returned to the white key 1, the jack 13 is quickly returned to the initial position when the white key 1 is returned even if the white key 1 is slightly returned. From the midpoint of the return of 1, the hammer 10 can be repeatedly hit with the rotation of the hammer 10, and good hit characteristics can be obtained. Further, in the keyboard device of this embodiment, since the catcher 6 is formed integrally with the white key 1, the position accuracy of the catcher 6 can be improved and the catcher 6 can be formed easily and at low cost. it can.

The present invention is not limited to the above-described embodiments, but can be implemented in various modes. For example, in the embodiment, the hammer is arranged so as to mainly extend forward with respect to the hammer fulcrum, but the present invention may be applied to a keyboard device in which the hammer is arranged so as to extend rearward. .. In addition, the detailed configuration can be appropriately changed without departing from the spirit of the present invention.

[0024]

[Effect of the device]

 As described above in detail, the keyboard device for an electronic musical instrument of the present invention has a good key touch feeling very close to that of an acoustic piano, and has the effect of improving the repeated hitting characteristic. ..

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view showing a key and a jack of the keyboard device of FIG.

3 is a perspective view showing a hammer of the keyboard device of FIG. 1. FIG.

FIG. 4 is a side sectional view showing the keyboard device of FIG. 1 in a state where the jack is about to separate from the hammer when a key is pressed.

5 is a side sectional view showing the keyboard device of FIG. 1 in a state where the jack is separated from the hammer when a key is pressed.

FIG. 6 is a side sectional view showing the keyboard device of FIG. 1 in a state where a hammer is caught by a catcher when a key is pressed.

FIG. 7 is a cross-sectional view showing a conventional keyboard device.

FIG. 8 is a cross-sectional view showing a conventional keyboard device different from FIG. 7 in a key released state.

9 is a sectional view showing the keyboard device of FIG. 8 in a key-depressed state.

[Explanation of symbols]

 1 White key 3 Keyboard chassis 6 Catcher 10 Hammer 13 Jack

Claims (2)

[Scope of utility model registration request] 1. A key rotatably attached to a keyboard chassis, a hammer rotatably attached to the keyboard chassis, and a hammer rotatably attached to the key and abutting the hammer. In a keyboard device of an electronic musical instrument, which comprises a jack configured to press and rotate the hammer when the key is pressed, and to be detached from the hammer during the rotation of the hammer, in a return direction of the hammer. A keyboard device for an electronic musical instrument, wherein the key is provided with a catcher for catching the hammer while the hammer is returning. 2. The keyboard device for an electronic musical instrument according to claim 1, wherein the catcher is formed integrally with the key.