JP3128841B2 - Touch response sensor 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 a touch response sensor for an electronic musical instrument capable of detecting whether a stroke of a performance operator is in an initial area or an after area.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a performance apparatus in which a performance operator such as a push button is combined with each sensor for detecting a depression stroke of the push button (see FIG. 46 of Japanese Patent Application Laid-Open No. 2-214897, FIG. 46). See FIG. 53). An example of such a device is shown in FIG. In this figure, an actuator 21, which is a bottom surface of a performance push button 20, is connected to a potentiometer 22 for detecting a vertical stroke (displacement). An elastic body 23 is provided near the potentiometer 22. When the actuator 21 is depressed, the potentiometer 22 detects this. Also, when the actuator 21 is pressed down to some extent, the bottom surface comes into contact with the elastic body 23, and a load is applied to the subsequent stroke because the elastic body must be deformed. The stroke area after the actuator 21 contacts the elastic body 23 is the after area, and the previous stroke area is the initial area. The stroke data in the initial area is used as a parameter for determining the character of the sound at the start of sounding of the electronic musical instrument, and the stroke data in the after area is used as a parameter for controlling a change in timbre while sounding is continued.

[0003]

However, in the conventional apparatus, a detecting means (potentiometer) for detecting a stroke is used.
However, since the sensor is used in common with the sensor for detecting the initial area and the after area, there is a disadvantage that the detection accuracy is reduced. FIG. 6 shows a displacement graph of a stroke in a conventional touch response sensor. In this figure, the solid line is a change graph when the button is pressed lightly, and the dotted line is a change graph when the button is pressed strongly. A point indicated by a white circle in the graph is a region where the transition from the initial region to the after region is determined. As shown in this figure, the conventional touch response sensor distinguishes an initial area and an after area based on a change rate of a stroke. The method of distinguishing between the initial region and the after region based on the change rate of the stroke is a method in which the position where the actuator abuts on the elastic body and the change rate becomes dull is determined as the boundary between the initial region and the after region. However, in order to perform this detection, it is necessary to have a certain dead time for judging a decrease in the rate of change (speed). For this reason, there was a disadvantage that the detection was delayed.

[0004] Further, as shown in the drawing, when the elastic body is deformed to a certain extent, the speed becomes slow at a place where the elastic body is deformed to some extent. Because of the characteristics of such an elastic body, there is a disadvantage that erroneous difference occurs in the detection position of the boundary.

It is an object of the present invention to provide a touch response sensor of an electronic musical instrument which solves the above-mentioned problem by providing after mode detecting means for detecting an initial area and an after area in addition to the stroke detecting sensor of the present invention. .

[0006]

According to the present invention, there is provided a displacement operation section provided on a performance operation element having a predetermined stroke, and detecting a displacement of the performance operation element over an initial area and an after area; Yes displacement and after-mode detection unit provided separately from said displacement detector for detecting whether the after-region is the initial region, the
A touch response sensor of the electronic musical instrument to be, the
The after-mode detection unit is separated from the performance operator.
Is activated when a performance operator is operated by a predetermined amount.
Is driven, and in the after region by being driven
It detects that there is
That it gives a reaction force to
Features.

[0007]

The touch response sensor according to the present invention is provided with an after mode detecting section for detecting whether the stroke is an initial area or an after area in addition to a displacement detecting section for detecting a stroke of a performance operator. . The after mode detection unit detects only the stroke area separately from the stroke displacement detected by the displacement detection unit. Thereby, the detection accuracy can be improved and the detection speed can be improved, and the effect of prompt aftertouch can be realized. Also, in the after area,
By applying a reaction force, the operational feeling and initial
The operational feeling of the char area can be made different,
You can make it easier to play.

[0008]

FIG. 1 is a diagram showing a schematic configuration of a touch response sensor of an electronic musical instrument according to an embodiment of the present invention. The touch response sensor 1 is mounted on a printed wiring board 8 and is mounted directly below the actuator 2 of the performance operator. The touch response sensor 1 includes a center part 3 having a bowl shape and a peripheral edge part 4 formed around the center part. A reflection type photo sensor 5 is provided in the center part 3. A space is formed below the peripheral portion 4, and contacts 6 and 7 are formed on the sensor side and the substrate side of this space, respectively. This touch response sensor 1 is formed of an elastic resin,
It is deformed by the depression of the actuator 2.

When the actuator 2 is depressed,
First, the central part 3 is deformed. The degree of this deformation is detected by the photo sensor 5. When deformed to some extent, the actuator 2 comes into contact with the peripheral edge portion 4. The contact 6
7 makes contact and conducts. This conduction detects that the vehicle has entered the after region from the initial region. The subsequent stroke (depression of the actuator 2) involves not only the deformation of the central portion 3 but also the deformation of the peripheral portion 4, so that a certain amount of force is required, and a touch sensation in an after-area can be provided. The photo sensor 5 has a stroke (displacement) in all regions depending on the intensity of the reflected light on the upper surface of the center portion 3
Can be detected.

[0010] FIG. 2 is a diagram illustrating another embodiment of the touchless port Nsusensa. In this embodiment, the central portion 3 and the peripheral portion 4 are made of a material having different elastic coefficients. That is, the central portion 3 is made of a material having a high degree of flexibility, and the peripheral portion 4 is made of a material having a certain degree of rigidity. From particular this way, it is possible to increase the difference in the touch feel of the initial region and the after-region,
It is easy to play.

The central portion 3 and the peripheral portion 4 can be formed of different materials at the time of integral molding, but they can also be formed separately. In this case, pins for fixing the sensor to the substrate 8 are formed on the center portion 3 and the peripheral portion 4 as shown in FIG.
4b).

FIG. 3 is a diagram showing still another embodiment of the present invention. In this figure, a potentiometer 10 and an elastic body 12 are used as in the conventional example shown in FIG. 5, but a membrane switch 11 is provided on the lower surface of the elastic body. Thus, when the actuator 2 comes into contact with the elastic body 12, the membrane switch 11 is turned on, and it is possible to detect a transition from the initial area to the after area.

According to the above-mentioned embodiment, as shown in FIG. 4, even if the push button (actuator) is pressed down strongly (dotted line) or pressed down weakly (solid line), the same displacement point becomes the after-touch area, and an effective after-touch area is obtained. You can play.

[0014]

As described above, according to the present invention, in addition to the displacement detecting section for detecting the stroke of the performance operator, an after mode detecting section for detecting whether the stroke is the initial area or the after area. By providing,
The detection accuracy and the detection speed can be improved, and the after-touch effect can be efficiently obtained. Ma
Further, according to the present invention, in the after area,
By applying a reaction force, the operational feeling and
The operational feeling of the initial area can be made different,
To make it easier to play.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a touch response sensor according to an embodiment of the present invention, FIG. 2 is a diagram showing another embodiment of the touch response sensor, and FIG. 3 is a diagram showing still another embodiment of the present invention. FIG. 4 is a diagram showing the stroke displacement of the actuator in the embodiment of the present invention. FIG. 5 is a diagram showing a conventional touch response sensor, and FIG. 6 is a diagram showing a stroke displacement of the conventional touch response sensor.

[Explanation of symbols]

1-touch response sensor, 2-actuator, 3
-Central, 4-peripheral, 5-photosensor, 6,7-contact. 10-potentiometer, 11-membrane switch.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G10H 1/053 G10H 1/32-1/34

Claims (1)

(57) [Claims] 1. A displacement detection unit provided on a performance operator having a predetermined stroke, for detecting a displacement of the performance operator over an initial area and an after area, and determining whether the displacement of the performance operator is an initial area. et provided separately from said displacement detector for detecting whether an area
The and-after mode detection unit, a touch response sensor of an electronic musical instrument to have a, the after-mode detection unit, away to the performance operator
When the performance control is operated by a predetermined amount,
It is driven, and when it is driven,
Area is detected, and
To provide a reaction force to the performance operator.
Touch response sensor for child musical instruments.