JP4029513B2 - Pedal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pedal device used for an electronic keyboard instrument such as an electronic piano, and more particularly to a pedal device that realizes a touch close to a live piano.
[0002]
[Prior art]
Conventionally, some electronic keyboard instruments are equipped with three pedals that function in the same manner as a damper pedal, a soft pedal, a sostenuto pedal, and the like provided on a normal live piano. In the case of an electronic keyboard instrument, it is not actually struck and sounded like a live piano, so the damper is lifted or the sostenuto rod is rotated according to the amount of pedal operation to actually string the damper. There is no need to move away. Instead, processing corresponding to these pedal operations is performed electrically, and the same sounding as when the pedal is operated is performed. Therefore, the mechanism of the pedal device itself is simple. As shown in FIG. 3, a coil spring 34 is provided between the pedal 32 and the bottom plate 33 that are rotatably attached to the pedal indicating member 31, so that the pedal 32 is attached to the pedal 32. It's as simple as giving an upward reaction force.
[0003]
[Problems to be solved by the invention]
In the case of an electronic keyboard instrument, since a reaction force is applied from below the pedal 32 by the coil spring 34, it is difficult to use other reaction force. Further, in the pedal device of the electronic keyboard instrument, the reaction force is generated by the coil spring 34. Therefore, the reaction force increases as the pedal 32 is depressed. This is because the reaction force F of the coil spring 34 is proportional to the contraction length x of the coil spring 34 (F = kx, k: constant). The reaction force of the coil spring 34 does not depend on the speed v when the pedal is depressed. On the other hand, in the case of a live piano, various mechanisms such as heavy dampers are lifted only by operating the pedal, so the reaction force depends on the pedal position, contrary to the pedal device of electronic keyboard instruments. Rather, it depends on the product of the square of the pedal depression speed v and the weight m of the damper or the like. Therefore, the pedal operation feels heavy when the stepping speed is fast, and light when the stepping speed is slow. That is, the touch feeling of the pedal device of the electronic keyboard instrument is a position-dependent type that depends on the pushing position of the coil spring, and is completely different from the touch feeling of the pedal device of a live piano that is a speed-dependent type that depends on the depression speed of the pedal. Met.
[0004]
This invention is made in view of the above-mentioned point, and it aims at providing the pedal apparatus which can implement | achieve the touch feeling close | similar to the pedal apparatus of a live piano with a lightweight and simple structure.
[0005]
[Means for Solving the Problems]
The pedal device according to claim 1 is one of a leaf spring provided with one end fixed to the base of the electronic musical instrument and the other end being a free end, and a fixed portion of the leaf spring to the free end. A weight disposed at a predetermined position of the plate spring, a connecting portion provided on a lower surface of the plate spring so as to support a part of the plate spring from a part of the arrangement position of the weight to a fixed end side, and a player A pedal that can be stepped down, and an action end that moves up and down in conjunction with the pedal, and the connection end provided on the lower surface of the leaf spring is supported by the action end; And an actuating member that transmits the reaction force to the pedal side by pushing up the leaf spring at the position of the connecting portion when the working end portion moves upward in response to the lowering . One end of the leaf spring is fixed, the other end is a freely swingable free end , a weight is placed at any predetermined position from the fixed portion of the leaf spring to the free end, and the weight is placed on the leaf spring. A connecting part is provided on the lower surface of the leaf spring so as to support from a part of the position to the fixed end side from the weight, and the connecting part is supported by the action end part of the operating member interlocked with the pedal, and according to operation of the pedal Thus, the leaf spring is pushed up and driven at the position of the connecting portion by the action end portion of the actuating member, so that a reaction force is generated in both the leaf spring and the weight. Since the swinging range of the leaf spring is short, the reaction force generated by the leaf spring itself is almost constant, and the touch feeling of the pedal is not a position dependent type but a speed dependent type affected by the weight. Therefore, the pedal operation feels heavy when the stepping speed is fast, and light when the stepping speed is slow.
According to a second aspect of the present invention, there is provided a pedal device according to claim 2, wherein one end is fixed to the base of the electronic musical instrument, and the other end is a free end, and either the fixed portion of the leaf spring to the free end is provided. A weight disposed at the first predetermined position, a pedal that can be stepped down by a player, and an action end that moves up and down in conjunction with the pedal, and is located closer to the free end than the weight position of the leaf spring. A second predetermined portion that is supported by the working end, and when the working end moves upward in response to depression of the pedal, the second predetermined portion of the leaf spring is pushed up. And an actuating member for transmitting the reaction force to the pedal side. Also in this case, one end of the leaf spring is fixed, the other end is a freely swingable free end, a weight is arranged at any first predetermined position from the fixed portion of the leaf spring to the free end, The second predetermined portion located on the free end side from the weight position of the leaf spring is supported by the action end of the operating member interlocked with the pedal, and the second predetermined portion of the leaf spring is supported according to the operation of the pedal. Since the driving end of the actuating member is pushed up and driven, a reaction force is generated in both the leaf spring and the weight, and the same effect as described above is obtained.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a diagram showing a schematic configuration of a pedal device according to the present invention. FIG. 1 (A) shows a configuration of a shelf portion of an electronic musical instrument, and FIG. 1 (B) shows a configuration of a pedal portion.
[0007]
Since the configuration of the pedal portion is the same as the conventional one, it will be briefly described. The pedal support member 2 is attached to the bottom plate 1, and a pedal 4 is rotatably attached to a fulcrum pin 3 thereof. A push-up rod 6 is provided at the rear end of the pedal 4. A coil spring 5 is provided between the push-up bar 6 and the pedal support member 2 to give the pedal 4 a reaction force in a direction to depress the pedal 4. An upward force is applied to the push-up rod 6 by the reaction force of the coil spring 5 so that the cushioning material 91 provided at the lower end of the lever 8 and the capstan screw 61 of the push-up rod 6 are always in contact with each other. It has become. The buffer material 91 is made of felt, resin, rubber, or the like. That is, the vertical movement of the push-up bar 6 and the rotational movement of the lever 8 are interlocked.
[0008]
The lever 8 rotates around a fulcrum pin of a lever support member 9 screwed to the lower side of the shelf board 7. Stoppers 10 and 11 for restricting the rotation range of the lever 8 are provided below the shelf board 7. The stopper 10 is L-shaped and restricts the lower limit position of the lever 8, and the stopper 11 restricts the upper limit position and defines the stroke range of the lever 8. A cushioning material 92 made of felt, resin, rubber or the like is attached to the stopper 11 side of the lever 8, and the cushioning material 92 is covered with a cloth 93.
[0009]
One end side 13c of a U-shaped leaf spring 13 is screwed to the upper side of the shelf board 7. The other end side of the U-shaped plate spring 13 and the lever 8 are coupled so as to be interlocked by a connecting rod 14 provided so as to move up and down the through hole of the shelf plate 7. Cushioning materials 141 and 142 are provided at both ends of the connecting rod 14. The coil spring 12 applies a reaction force toward the shelf plate 7 to the lever 8 so that the connecting rod 14 is always in contact with the connecting plate 131 of the U-shaped plate spring 13. A weight 15 is screwed to the upper surface side of the leaf spring 13. The weight 15 is interlocked with the movement of the leaf spring 13. Accordingly, the leaf spring 13 is interlocked with the movement of the pedal 4. At the free end of the leaf spring 13, stoppers 16 and 17 for restricting the movement range of the leaf spring 13 to which the weight 15 is coupled are fixed to the shelf plate 7 like the lever 8. The stopper 16 is L-shaped and restricts the upper limit position of the leaf spring 13, and the stopper 17 restricts the lower limit position and defines the stroke range of the leaf spring 13. A cushioning material 94 made of felt, resin, rubber or the like is attached to the stopper 16 side of the leaf spring 13. The buffer material 94 abuts against the stopper 16 and the upper limit is regulated. A buffer material 95 is attached to the stopper 17 side of the leaf spring 13 and is covered with a cloth 96 in a double manner. The lower limit position is regulated when the cloth comes into contact with the stopper 17. The leaf spring 13 is screwed to the shelf plate 17 through holes 13a and 13b for screwing.
[0010]
The operation of the pedal device of FIG. 1 will be described. When the performer depresses the pedal 4, the push-up bar 6 is raised. The lever 8 rotates to the shelf 7 side as the push-up bar 6 moves up. As the lever 8 rotates, the connecting rod 14 rises. As the connecting rod 14 is raised, the leaf spring 13 rotates in a direction away from the shelf board 7. That is, the leaf spring 13 rotates in conjunction with the depression of the pedal 4, and the rotation speed and the like depend on the depression speed of the pedal 4. At this time, since the weight 15 is provided in the leaf spring 13, a feeling of weight corresponding to the product of the square of the rotation speed v and the weight m of the weight is generated in the pedal 4. Further, since the rotational stroke of the leaf spring 13 is short, the reaction force F (= kx) of the leaf spring 13 hardly changes, so that the touch feeling of the pedal 4 is not position-dependent and the influence of the weight 15 is affected. Received speed dependent type.
[0011]
FIG. 2 is a diagram showing a schematic configuration of another embodiment of the pedal device according to the present invention. 2, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. This embodiment differs from FIG. 1 in that a U-shaped plate spring 13 is provided on the lower side of the shelf plate 7 and the end of the plate spring 13 is directly pushed up and driven by a capstan screw 61 of the stick 6. This is the point. Thereby, each mechanism such as the lever 8 provided on the lower side of the shelf board 7 in FIG. 1 can be omitted, the number of parts can be greatly reduced, and the feeling of weight given to the pedal 4 is made the same. Can do.
[0012]
In the above-described embodiment, the case where the leaf spring is provided on the shelf board 7 of the electronic musical instrument has been described, but it may be provided near the pedal 4. Moreover, although the case where the U-shaped leaf | plate spring was used was demonstrated in the above-mentioned embodiment, the shape of a leaf | plate spring is not limited to this, A square shape, L shape, and U shape Or any other shape. In the above-described embodiment, the reaction force of the leaf spring is not used. However, the rotation stroke is increased to some extent so that both the weight feeling due to the mass of the weight and the reaction force of the spring are used. Also good. In this case, the leaf spring may further adjust the spring coefficient by a laminated leaf spring. In the above-described embodiment, the case where the weight 15 is provided in the vicinity of the leaf spring has been described. However, the length of the leaf spring is made longer than the position of the stopper so that the weight is provided on the right side of the push-up rod 6 and the weight 15 is provided. The weight may be reduced. Further, instead of the lever 8 of FIG. 1, a U-shaped leaf spring may be provided and the top and bottom of the shelf plate may be constituted by a leaf spring.
[0013]
【The invention's effect】
According to the present invention, there is an effect that it is possible to realize a touch feeling close to a pedal device of a live piano with a light and simple configuration.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an embodiment of a pedal device according to the present invention.
FIG. 2 is a diagram showing a schematic configuration of another embodiment of the pedal device according to the present invention.
FIG. 3 is a diagram showing a schematic configuration of a conventional pedal device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bottom plate, 2 ... Pedal support member, 3 ... Supporting pin, 4 ... Pedal, 5,12 ... Coil spring, 6 ... Push-up bar, 7 ... Shelf board, 8 ... Lever, 9 ... Lever support member 10, 11, 16 17 ... Stopper, 13 ... Leaf spring, 14 ... Connecting rod, 15 ... Weight, 91, 92, 94, 95 ... Buffer material, 93, 96 ... Cross

Claims (2)

A leaf spring provided with one end fixed to the base of the electronic musical instrument and the other end being a free end;
A weight disposed at any given location from the fixed part of the leaf spring to the free end ;
A connecting portion provided on the lower surface of the leaf spring so as to support from a part of the arrangement position of the weight in the leaf spring to the fixed end side from the weight;
A pedal that can be depressed by the performer;
It has an action end portion that moves up and down in conjunction with the pedal, and the connection portion provided on the lower surface of the leaf spring is supported by the action end portion. A pedal device comprising: an actuating member that transmits the reaction force to the pedal side by pushing up the leaf spring at the position of the connecting portion when the end portion moves upward . A leaf spring provided with one end fixed to the base of the electronic musical instrument and the other end being a free end;
A weight disposed at any first predetermined position from the fixed portion of the leaf spring to the free end ;
A pedal that can be depressed by the performer;
A working end portion that moves up and down in conjunction with the pedal; and a second predetermined portion located on the free end side of the weight position of the leaf spring is supported by the working end portion; And an actuating member for transmitting the reaction force to the pedal side by pushing up the second predetermined portion of the leaf spring when the working end moves upward in response to the lowering. apparatus.

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