JP2848153B2 - Operating device for electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for an electronic musical instrument.

[0002]

2. Description of the Related Art In a conventional keyboard-type operating device for an electronic musical instrument,
Detecting a touch (initial touch) when the keyboard-type operator is pressed to control the musical tone, and detecting a touch (after-touch) such as pressing the operator further / deeply while the operator is being pressed. Performing tone control and the like are performed.

[0003] Among them, aftertouch detection is used to reproduce a performance expression in which a vertical force is applied to an operator or a controller is displaced vertically.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic musical instrument capable of detecting a force or a displacement applied not only in the vertical direction but also in the horizontal direction to the operation element, thereby enriching the performance expression. An operation device is provided.

[0005]

According to the present invention, there is provided an operating device for an electronic musical instrument, comprising: a supporting member; an operating member rotatably supported by the supporting member in the vertical and horizontal directions; and one end fixed to the supporting member. An elastically deformable cantilevered stopper member having a stopper for restricting downward movement of the operation member and a stopper for restricting lateral movement of the operation member at the other end; and the stopper member. And a sensor that detects a vertical force or displacement and a horizontal force or displacement applied to the stopper member and converts the force or displacement into an electric signal.

[0006]

The player presses down on the operating member to bring the operating member into contact with a stopper for restricting the downward movement position of the stopper member.

[0007] Since the pressing force applied by the player thereafter is transmitted to the stopper member, it is detected by a sensor provided on the stopper member and converted into an electric signal. At this time, if the pressing force includes a vertical component and a horizontal component, these two components are detected by the sensor and converted into an electric signal.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an electronic musical instrument operating device according to an embodiment of the present invention.

The operating device comprises a support member 2, an operating member 4,
And a stopper member 6. The support member 2 has a fulcrum member 8
Has been fixed. This fulcrum member 8 is at the bottom (rotation fulcrum)
8A and a support 8B, and the upper surface of the bottom 8A has a spherical shape.

A through-hole 9 is formed in the operating member 4, and the diameter of the lower opening 9 A of the through-hole 9 is the same as the diameter of the support portion 8 B of the fulcrum member 8.
Is slightly larger than the diameter. The fulcrum member 8 is
The support portion 8B is inserted into the through hole 9, and the spherical portion of the bottom portion 8A is in contact with the lower surface of the operation member 4.

The operation member 4 is supported so as to be rotatable around the spherical portion in the vertical direction (vertical direction in FIG. 1) and the horizontal direction (direction perpendicular to the paper surface of FIG. 1). A spring 10 is provided between one end of the operation member 4 and the support member 2. The spring 10 urges the operation member 4 upward.

A first extending portion 12 extending downward is provided at the other end of the operating member 4. This first extension 12
Restricts upward rotation of the operation member 4 by contacting a stopper portion 14 provided on the support member 2.

A second extending portion 16 is also provided at the center of the operating member 4 and extends downward. The second extension 16 is engaged with a spring 17 provided on the support member 2 to transmit the urging force from the spring 17 to the operation member 4.

A two-make switch 18 is provided on the support member 2. The switch 18 is turned on when the operation member 4 is pressed, and detects an initial touch such as a pressing speed when the operator is pressed.

The stopper member 6 has a cantilever structure in which a base end 20 on one end side is fixed to the support member 2 by screws 21 and the other end is a free end. A vertical stopper 22 is provided on the other end of the stopper member 6. The vertical stopper 22 abuts on the operation member 4 to restrict the downward rotation of the operation member 4.

FIG. 2A is a plan view of the stopper member 6 as viewed in the direction of arrow A in FIG. As shown in the drawing, the stopper member 6 includes a base end portion 20, a first deformed portion 24 adjacent to the base end portion 20, and a second deformed portion 26 adjacent to the first deformed portion 24.
And

The first deformed portion 24 is thinned in the left-right direction, and the second deformed portion 26 is thinned in the vertical direction. Therefore, the first deformed portion 24 is easily deformed in the left-right direction, and the second deformed portion 26 is easily deformed in the up-down direction.

A resistance strain gauge G2 for detecting a force in the left-right direction is attached to the first deformable portion 24. Further, a resistance wire strain gauge G1 for detecting a vertical force is attached to the second deformation portion 26. The resistance change of these strain gauges G1 and G2 is determined by the lead wire L1.
, L2 to an amplifier (not shown).

At the other end (the right end in FIG. 2A) of the second deformed portion 26, a forked lateral stopper portion 28 is formed. The lateral stopper portion 28 is provided on the first side of the operation member 4.
It engages with the extension 12 to restrict the rotation of the operation member 4 in the lateral direction.

FIG. 2B is a perspective view of the right end of the operation member 4 of FIG. The spring 10 is fixed by inserting one end thereof into a hole 30 provided on the upper surface of the operation member 4 and inserting the other end thereof into a hole 32 (see FIG. 1) provided in the support member 2.

When the player depresses the operation member 4, the operation member 4 rotates vertically about the rotation fulcrum 8A. When the first extension portion 12 of the operation member 4 comes into contact with the vertical stopper 22 of the stopper member 6, the stopper member 6
The force in the vertical direction is transmitted from the shaft and deforms in proportion to the force.

Generally, the bending moment is expressed by a section modulus (z).
X is proportional to the stress, and the resistance change ΔR of the strain gauge is proportional to the stress σ. That is, M = z × σ σ = k × △ R where k is a constant.

Therefore, assuming that the bending moment received by the strain gauge G1 is M1, this bending moment can be obtained from the resistance change ΔR1 of the strain gauge G1 as follows. M1 = z × k × △ R1 (1) where z is the section modulus of the material of the stopper member 6 at the position where the strain gauge is provided. K is a constant determined by the modulus of elasticity and Poisson's ratio,
It is a constant value depending on the material.

Further, assuming that the vertical pressing force transmitted from the operating member 4 is F1 and the distance between the engagement position of the operating member 4 and the stopper member 6 and the strain gauge G1 is x1, the force balancing condition is as follows. , M1 = F1.times.x1.

From equations 1 and 2, F1 = (z × k × △ R1) / x1 Equation 3 is obtained.

Therefore, the output of the strain gauge △ R1 is proportional to the vertical pressing force F1. In general, the length L
When a force F is applied to the free end of the cantilever, the displacement of the cantilever in the direction in which the force F is applied is proportional to the force F. Therefore, the vertical displacement of the stopper member 6 and the pressing force F1
Is proportional to Since this pressing force F1 is proportional to △ R1, the output of the strain gauge △ R1 is the vertical pressing force F1.
And the displacement of the stopper member 6 in the vertical direction.

If the pressing force F by the player includes a component F2 in the left-right direction, the operation member 4 will be rotated 8A.
Also rotate around the left and right. When the operation member 4 rotates in the left-right direction, the lateral force is also transmitted to the stopper member 6 that is in contact with the operation member 4 via the lateral stopper portion 28, and the operation member 4 rotates. At this time, assuming that the resistance change of the strain gauge G2 is △ R2, the lateral force F2 transmitted from the operating member 4 can be calculated as follows: F2 = (z × k × △ R2) / X2 Expression 4

Where x 2 is the operating member 4 and the stopper member 6
And the distance between the strain gauge G2. Therefore, the output ΔR2 of the strain gauge G2 is proportional to the lateral force F2. Further, for the above-mentioned reason, since the lateral displacement of the stopper member 6 and the lateral force F2 are proportional, the output of the strain gauge △ R2 is determined by either the lateral F2 or the lateral displacement of the stopper member 6. Is also proportional.

The output signals of the strain gauges G1 and G2 are input to an amplifier (not shown), then converted into digital values by an A / D converter, and input to musical tone signal control means.
The tone control means performs various tone controls in accordance with the input signal.

FIG. 3 shows another embodiment of the electronic musical instrument operating apparatus according to the present invention, in which only the front end (the left end in FIG. 1) of the operating member 4 is shown. The operation member 4 is provided with irregularities in the width direction of the operation member 4 on the upper surface of the front end.

Therefore, when the operating member 4 is incorporated in the operating device of the embodiment shown in FIG. 1, even if a force in the right and left directions is applied, the finger does not slip due to the frictional force between the finger and the operating member 4, so that the operation is easy. Become.

In the illustrated embodiment, irregularities are provided not only in the width direction of the operation member 4 but also in the longitudinal direction. Although the present invention has been described based on the embodiments, the present invention is not limited to these embodiments and can be variously modified.

[0033]

According to the electronic musical instrument operating device of the present invention,
A force or displacement applied not only in the vertical direction but also in the horizontal direction can be detected. Further, even if the operation element is separated from the downward stopper portion, the force or displacement applied in the left-right direction can be detected. By these actions, the performance expression can be enriched.

[Brief description of the drawings]

FIG. 1 is a sectional view of an electronic musical instrument operating device according to an embodiment of the present invention.

FIGS. 2A and 2B show a main part of the operating device of FIG. 1; FIG. 2A is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a perspective view showing only a main part of another embodiment of the operating device of the electronic musical instrument of the present invention.

[Explanation of symbols]

G1, G2 strain gauge 2 support member 4 operation member 6 stopper member 8 fulcrum member (8A
Rotating fulcrum 8B column part) 9 through hole 9A downward opening 10 spring 12 first extension
14 Stopper part 16 Second extension part 18 Switch 20 Base end part 21 Screw 22 Vertical stopper 24 First deformed part 26 Second deformed part 28 Lateral stopper part 30 Hole

Claims (1)

(57) [Claims] 1. A support member, an operation member rotatably supported by the support member in the vertical and horizontal directions, one end fixed to the support member, and the other end restricting downward movement of the operation member. An elastically deformable stopper member having a cantilever structure having a stopper portion and a stopper portion for restricting a lateral movement of the operation member; and a vertical force applied to the stopper member provided on the stopper member. An operating device for an electronic musical instrument, comprising: a sensor that detects the displacement and the force or displacement in the left-right direction and converts the displacement into an electric signal.