JPH0634166B2 - Keyboard device for musical instruments - Google Patents

Description

TECHNICAL FIELD The present invention relates to a keyboard device, and more particularly to a keyboard device having an improved key mechanism so as to obtain a key touch feeling similar to that of a grand piano.

(Prior Art) Generally, practicing pianists and the like are indispensable to practice playing in their daily lives. However,
Practicing by actually playing the piano in daily life had a great influence on neighboring residents because of the loud sound of the performance, so the practice place, time, etc. were restricted. Even if a suitable practice place was found, it took a lot of labor and cost to carry a heavy piano to that place.

Therefore, various devices have been conventionally proposed as a piano training device, and as an example, a device for practical use has been proposed.
The piano performance training device disclosed in Japanese Patent Publication No. 82-82, the practice keyboard disclosed in Japanese Utility Model Publication No. 51-94367, and the like have been known.

In the former case, the piano performance training device was a full-scale one in which the keyboard part of the grand piano was stored in the cabinet almost as it was. However, the key action mechanism and the like are complicated, the number of parts is large, and as a result, the cost is high, and the device itself is large in size, which is not suitable for carrying.

On the other hand, in the latter, a pair of shelf plate members, each having a plurality of keys respectively, are foldably connected by a hinge. However, the key installation structure was simple, and the key touch feeling was far from that of an actual piano.

Therefore, the applicant of the present application has proposed a keyboard device incorporating an escape mechanism composed of a columnar body and a release member in order to obtain a key touch feeling similar to that of an actual grand piano.
90921).

This device has a columnar body rotatably attached to a key,
Returning means for imparting return habit to the columnar body, and pressing means for elastically pressing the columnar body in the axial direction to lock the columnar body in the initial position and for imparting a resistance force to the swing of the key, A piano action escape mechanism is added, which includes a release member that comes into contact with the columnar body when the key swings by a predetermined angle. Then, the columnar body comes into contact with the release member immediately before the end of the key pressing operation, so that the columnar body is temporarily escaped from the pressing means.

(Problems to be Solved by the Invention) However, in such a keyboard device according to the prior application, the pressurizing means for applying the resistance force to the swing of the key elastically presses the columnar body in the axial direction. Therefore, the resistance force is increased only by the elastic force of the pressing means and at a constant value or at a constant rate when the key is swung. As a result, there is an inconvenience that the touch feeling is different from the key touch feeling due to the string striking mechanism of the grand piano.

In other words, the key touch feeling of the grand piano is that when the damper head moves away with the rocking of the key, the first feeling of resistance occurs, and then when the jack starts moving, there is a feeling of friction, and when the hammer escapes, there is no feeling of resistance. , Aftertouch is generated during rebounding by hitting a string. On the other hand, in the prior application device, the distinction between the initial resistance feeling and the subsequent friction feeling is not clear, and the key touch feeling as a whole is different from that of the grand piano.

(Means for Solving Problems) Therefore, the present invention is a keyboard device for musical instruments, which includes a support member (3), a key (5), a weight member (19), and a friction member (31), The key (5) has a protrusion (1
5), and is supported by the support member (3) so as to be swingable in the vertical direction, and the weight member (19) is supported by the support member (3) so as to be capable of swinging in the vertical direction. The key engages the protrusion (15) to rotate in the vertical direction, the friction member (31) is attached to the support member (3), and the key (3) swings by a predetermined angle. When I did
The above problem is solved by a keyboard device for a musical instrument, which comes into contact with the protrusion (15) or the weight member (19) and applies a braking force to the swing of the key (3).

(Operation and Effect) In the keyboard device according to the present invention, when the key is rocked when the key is pressed, the braking member applies a braking force to the rocking.
When the key swings by a predetermined angle, the braking force changing means increases the braking force. That is, by varying the braking force with respect to the swing of the key in this way, the distinction between the initial resistance feeling due to the damper head and the friction feeling due to the jack in the actual grand piano is clarified, and a key touch feeling similar to this is obtained. Is what you get. In addition, since the friction member and the weight member are separate members and are fixed to a common member in a keyboard device capable of obtaining a piano touch, the touch can be easily adjusted.

(Embodiment) An embodiment of a keyboard device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a keyboard device showing an embodiment of the present invention.

In the figure, (1) is a substantially box-shaped case of a keyboard device, and this case (1) can be opened and closed, and a keyboard frame (3) is fixedly installed therein. A plurality of keys (5) are mounted on the keyboard frame (3) so as to be swingable in the vertical direction with the fulcrum (7) as a fulcrum. The fulcrum portion (7) is provided on the rear end side in the longitudinal direction of the key (5), and the key (5) is further urged in the counterclockwise direction in the figure on the rear end side of the key (5). A spring (9) is provided. Ie spring (9)
The key-depressing portion (11), which is the front end of the key (5), is lifted up to a predetermined height by means of a predetermined key-depression stroke (for example, 10).
mm). This spring (9) has a habit of returning to the key (5) (to return the key (5) to the initial position when releasing the key)
It constitutes a returning means for giving.

In addition, (13) is an adjusting screw for keeping the height of the key pressing portion (11) of each key (5) constant.

Here, an engaging piece (15) of a predetermined length projects downward from the lower surface of the intermediate portion in the longitudinal direction of the key (5). On the other hand, a supporting member (17) is provided at a position on the keyboard frame (3) substantially facing the engaging piece (15). That is, the support member (17) is arranged below the longitudinally intermediate portion of the key (5) so as to be positioned alternately with respect to the engagement piece (15) when the key is pressed. The support member (17) has a predetermined weight (for example, 6 with a key (5) for middle tone).
An inertial body (19) having about 0 g but different for high and low tones is supported swingably in the vertical direction. The inertia body (19) has its center of gravity (23) on the left side of the fulcrum pin (21) in the figure, and the curved upper surface of the portion on the right side of the pin (21) has the engaging piece (15). Is arranged so as to be able to contact the lower end surface of the. Further, the inertial body (19) is biased in the counterclockwise direction in the figure by the spring (24) with the pin (21) as a fulcrum. That is, the inertial body (19) is in contact with the stopper (25) on the keyboard frame (3) at its left end when the key is not pressed due to its own weight and the spring (24). The inertial body (19) constitutes a braking member that applies a braking force (resistive force) to the swing of the key (5).

Incidentally, (27) is a stopper (felt) for restricting the clockwise swing of the inertial body (19).

The lower surface of the engaging piece (15) has a curved right surface to form an engaging portion (29).
A spring (31) having a predetermined elastic force is arranged at a predetermined height position on the right side of the engaging portion (29) in the figure. That is, when the key 5 is swung by a predetermined angle and the engaging portion (29) is lowered by a predetermined height when the key is pressed, the spring (31) is slidably contacted with the engaging portion (29) and elastically deformed. However, a resistance force is applied to the swing. The spring (31) constitutes a braking force changing means for increasing the braking force when the swing angle of the key (5) becomes a predetermined value (6 mm in the key depression stroke) or more.

In addition, (33) is a lid of the case (1), (35) is a lid (3
3) is a stopper for holding the open state, and (37) is a holder handle of the case (1).

In the keyboard device having the above-described structure, in the initial stage of key depression (with a predetermined swing angle range, that is, when the stroke of the key depression is 10 mm, the depression is about 4 mm), the engagement piece (15) is the inertial body (19). ) Push down the right end. As a result, the inertial body (19) swings counterclockwise in the figure. That is,
As the center of gravity (23) of the inertial body (19) is lifted, its own weight and the elastic force of the spring (24) act on the key (5) as a resistance force against rocking (key pressing).
This resistance represents the first resistance feeling when the damper head is separated from the grand piano.

Then, when the key (5) is further pushed down (for example, about 2 mm further), the engaging portion (29) of the engaging piece (15) comes into sliding contact with the spring (31). As a result, the spring (31)
Elastically deforms, and the engaging piece (1
5). This frictional force further increases the resistance to the rocking of the key (5), and represents the friction feeling due to the rise of the jack in the grand piano. In other words, the braking force (resistive force) with respect to the swing of the key (5) becomes large beyond the predetermined angle range.

Further, when the key (5) is pushed down, the spring (31) is disengaged from the engaging portion (29) formed of a curved surface, and the resistance force is suddenly reduced. This is the so-called escapement.

Next, FIG. 2 shows another embodiment of the present invention.

In this embodiment, a spring (41) which constitutes a braking force changing means by a part of the escapement mechanism is arranged on the left side of the inertial body (19), and the inertial body (19) with which the spring (41) is in sliding contact.
Stepped surfaces (43) and (45) are formed on the left end surface of the. Therefore, according to this embodiment, when the key (5) swings by a predetermined angle, the inertial body (19) swings in the opposite direction in the same manner as described above, and the lower step surface (45) thereof has the spring (41). ). As a result, the above-mentioned friction feeling is generated. When the key (5) is further pushed down, the inertial body (19) also rises, and the lower step surface (4
5) is disengaged from the spring (41). It is an escapement.

Other configurations and operations are similar to those of the above-described embodiment.

In addition, in these examples, since the resistance feeling is imparted by using the inertial body (19), it is possible to obtain a dynamic touch feeling due to a so-called inertial effect. Especially, it is effective in practicing pianissimo. In addition, by providing a key-depression detecting means for detecting a key-depression corresponding to each key,
If the tone generation circuit of the electronic sound source can be controlled based on the detected key depression information, it can be used as a keyboard device of an electronic keyboard instrument.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a keyboard device according to an embodiment of the present invention, and FIG. 2 is a side sectional view showing a keyboard device according to another embodiment. 5 ... Key, 9 ... Spring (returning means), 19 ... Inertial body (braking member), 31 ... Spring (braking force changing means).

Claims (1)

[Claims] 1. A keyboard device for musical instruments, comprising a support member (3), a key (5), a weight member (19), and a friction member (31), wherein the key (5) hangs down from the lower surface. It has a protrusion (15) and is swingably supported by a support member (3) in the vertical direction. The weight member (19) is swingably supported by the support member (3) in the vertical direction. The friction member (31) is attached to the support member (3), and the key (3) is rotated at a predetermined angle. A keyboard device for musical instruments, which, when swung only, contacts the protrusion (15) or the weight member (19) and applies a braking force to the swing of the key (3).