JPH04153698A - Instrument key - Google Patents

Abstract

PURPOSE:To obtain a rhythm sound with loudness matching the operation feeling of an operator by using sheet type switches which are arranged in two upper and lower layers. CONSTITUTION:A 1st sensor sheet 4 is depressed with a key top 10 depressed at first and outputs a detection signal. When the key top 10 is depressed with a weak force, a specific rhythm sound generation device generates a rhythm sound with small loudness only with the detection signal from the 1st sensor sheet 4. When the key top 10 is depressed strongly, on the other hand, a 2nd sensor sheet 6 is depressed a slight time after the 1st sensor sheet 4 is depressed and the 1st and 2nd sensor sheets 4 and 6 outputs detection signals respectively. Consequently, the rhythm sound generation device generates a rhythm sound with large loudness according to the detection time difference between both the detection signals. Consequently, the rhythm sound with loudness corresponding to the strong or weak operation of the key top 10.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an instrument key that functions as a switch, and particularly to an instrument key that is installed in a rhythm machine that outputs a desired rhythm sound such as a drum sound. Concerning suitable innostrument keys.

[Conventional technology]

In general, many rhythm machines are used that are equipped with multiple instrument keys that correspond to desired rhythm sounds such as drum sounds.
By pressing the instrument key, a desired rhythm sound can be input.

FIG. 3 shows an instrument key used in such a conventional rhythm machine.A frame 1 made of an iron plate or the like has a pad 2 made of hard rubber or the like arranged at a predetermined distance from the frame 1. A detection sensor 3, such as a piezoelectric sensor, is attached to the lower surface of the frame 1 at a position corresponding to the lower part of the pad 2, and detects the impact when the pad 2 is struck, such as a piezoelectric sensor. There is.

According to the conventional instrument key described above, when the operator performs a tapping operation on the pad 2, the impact and impact force applied to the detection sensor 3 through the frame 1 are detected, and the pad 2 is tapped. A detection signal to the effect that the drum has been hit and a striking strength signal are output, and based on these detection signals, a rhythm sound generator (not shown) outputs rhythm sound at a desired volume.

[Problem to be solved by the invention]

However, in the conventional instrument key described above, the impact when the pad 2 is hit is
It is detected by the detection sensor 3, and a rhythm sound is output based on this detection signal.The pad 2 only transmits the impact caused by the hitting operation to the detection sensor 3, and the strength varies depending on the vibration state of the pad 2 itself. Since it is not a control device, when the pad 2 is struck, the intensity level intended by the operator and the volume of the rhythm sound that is actually output may deviate, resulting in a rhythm that matches the operator's senses. The problem was that no sound was output.

Furthermore, as described above, it is difficult to control the intensity of the rhythm sound by the operator's strong and weak tapping operations on the pad 2, so there is a problem in that the dynamic range of the rhythm sound becomes extremely narrow.

This invention has been made in view of the above-mentioned points, and is an instrument that can obtain rhythm sounds at a volume that matches the operating sense of the operator and that allows easy control of rhythm sounds over a wide dynamic range. The purpose is to provide a key.

[Means to solve the problem]

In order to achieve the above-mentioned object, an instrument key according to the present invention includes an operator, a weight that gives inertia to the operator, and a weight provided at the bottom of the operator to give a restoring force to the operator. An instrument key comprising an elastic body, an actuator section provided at the bottom of the operator, and sheet-like switches arranged in two layers, upper and lower, the sheet-like switches arranged in the two layers. The upper sheet-like switch is provided with a notch portion for operating the lower sheet switch by the elastic body or actuator,
The present invention is characterized in that the lower sheet-like switch is operated by one of the elastic body and the actuator, and the upper sheet-like switch is operated by the other.

[For production]

According to the present invention having the above-described configuration, in the case of two sensor sheets, by pressing the key top,
First, the first sensor sheet is pressed and a detection signal is output from the first sensor sheet.

By the way, when the pressing operation on the key top is performed with a weak force, a rhythm sound of low volume is generated from a predetermined rhythm sound generating device based only on the detection signal from the first sensor sheet.

On the other hand, when the pressing operation on the key top is performed with strong force, after the first sensor sheet is pressed,
The second sensor sheet is pressed with a slight time difference, and detection signals are output from the first sensor sheet and the second sensor sheet, respectively. Then, based on the detection time difference between these rain detection signals, the rhythm sound generating device generates a rhythm sound with a large volume. In this way, it is possible to output a rhythm sound with a volume corresponding to the strength of the key top operation.

Further, according to the present invention, by attaching a weight to the key top, inertia force is applied to the key top, so that when the operator presses the key top,
The response of the key top corresponds to the strength of the operation, and the sense of strength intended by the operator can almost match the detected value based on the detection time difference detected by the sensor sheet.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the drawings.

1 and 2 show an embodiment of the instrument key according to the present invention, in which a first sensor sheet 4 is disposed on the upper surface of a flat frame 1, and this first sensor Above the sheet 4 is a second plate having an opening 5 formed therein.
A sensor sheet 6 is arranged with a gap in between.

As shown in detail in FIG. 2, each of the sensor sheets 4 and 6 has a pair of conductive sheets 7.7 arranged close to each other in the vertical direction. 7
A predetermined pattern 8 for energization is formed on mutually opposing surfaces.

Moreover, spacers 9 are interposed between the respective conductive sheets 7 of the first sensor sheet 4 at positions other than those substantially corresponding to the openings 5 of the second sensor sheet 6. A spacer 9 is interposed between each of the conductive sheets 7 of the two sensor sheets 6 at a portion other than the peripheral edge of the opening 5 . Then, by energizing the portion of each conductive sheet 7 where the spacer 9 is not interposed in response to the operation of the key top 10, the first sensor sheet 4 is energized and then the second sensor sheet 6 is energized. The time required for the operation to occur is determined, and this time difference is used to output an output signal that matches the operating force.

Further, above the opening 5 of the second sensor sheet 6 of the frame 1, a key top 10 having a circular disk shape is arranged so as to be movable up and down. A cylindrical pressing protrusion 11 as a pressing member for pressing the portion of the second sensor sheet 6 where the spacer 9 is not interposed is integrally provided at the peripheral edge of the opening 5. Inside the pressing protrusion 11, a pressing spring 12, which is a coil spring, is housed as a pressing member for pressing the portion of the first sensor sheet 4 where the spacer 9 is not interposed. The upper end of this pressing spring 12 is in contact with the lower surface of the key top 10, while the lower end of the pressing spring 12 is seated on the conductive sheet 7 above the sensor sheet 4. , which urges the key top 10 upward.

Further, in this embodiment, a weight 13 is embedded inside the key top 10, and this weight 13 applies a relatively large inertial force to the key top 10.

Note that the key top 10 is pressed by the biasing force of the pressing spring 12.
When in the non-operating state, the lower end of the pressing protrusion 11 is spaced above the conductive sheet 7 above the second sensor sheet 6, and the conductive sheet 7 above the first sensor sheet 4 does not extend when the key top 10 biased by the pressure spring 12 is in a non-operated state, and expands when the key top 10 is pressed downward against the biasing force of the pressure spring 12, forming an up-down pattern. 8 has elastic properties such that it is energized.

Next, the operation of this embodiment having the above-described configuration will be explained.

In this embodiment, by pressing the key top 10 downward against the urging force of the pressing spring 12,
First, the first sensor sheet 4 is pressed by the pressing spring 12, and both patterns 8 of the conductive sheet 7 are brought into close contact with each other, and a first detection signal is output. Thereafter, when the pressing of the key top 10 is continued, the second sensor sheet 6 is pressed by the pressing protrusion 11 with a slight time difference, the upper conductive sheet 7 extends downward, and the lower conductive sheet 7 , both patterns 8 of both conductive sheets 7 are brought into close contact with each other, and a second detection signal is output.

Then, based on each of the detection signals, a predetermined rhythm sound generator (not shown) outputs a rhythm sound at a volume corresponding to the pressing operation on the key top 10.

That is, when the key top 10 is pressed with a strong force, the first sensor sheet 4 and the second sensor sheet 6
Since the patterns 8 are energized at very short time intervals, when a rhythmic sound with a large volume is output and the key top 10 is pressed with a weak force, the patterns 8 and 6 of each of the sensor sheets 4 and 6 are energized. 8 are energized at intervals longer than the above-mentioned time intervals, so that a rhythm sound with a low volume is output.

During this pressing operation, the weight 13 is placed on the key top 10.
is embedded, and this weight 13 applies an inertial force to the key top 10, so that when the operator presses the key top 10, the key top 10 responds to the strong and weak operation. The detected values detected by the sensor sheets 4 and 6 almost match the intensity sensation intended by the operator.

As described above, according to this embodiment, by applying an inertial force to the key top 10 using the weight 13, the response of the key top 10 can be made to respond to pressing operations with varying degrees of strength. Since the sense of intensity and the detected values of the sensor sheets 4 and 6 almost match the operator's intention, it is possible to output rhythm sound at a volume that matches the sense of the operator. You can easily control the intensity of the sound. As a result, it is possible to control the output of rhythm sounds over a wide dynamic range.

Note that, unlike the embodiment described above, a height difference is provided at the lower end of the pressing protrusion 11, which is a pressing member, and the first sensor sheet 4 shown in FIG. 2 is removed, and the second sensor sheet 6 is disposed. A first sensor sheet and a second sensor sheet may be disposed in the circumferential direction in the area where the pressing protrusion 11 is located, and the first detection signal and the second detection signal may be outputted, respectively, by the step of the pressing protrusion 11.

Note that the present invention is not limited to the embodiments described above, and can be modified in various ways as necessary. For example, by using three or more sensor sheets, it is also possible to output three or more detection signals depending on the strength of pressure.

Further, the key structure of the embodiment described above can be used as a key structure for specifying pitch. In particular, the second aspect of the present invention is that either the first make switch or the second make switch is pressed through an elastic body, and the other one is pressed directly with a key.
It is a characteristic of

〔Effect of the invention〕

As explained above, the instrument key according to the present invention uses a weight to apply inertia force to the key top, so that the response of the key top corresponds to the pressing operation with varying degrees of strength. Since the sense of intensity intended by the operator and the detected value of the sensor sheet almost match, it is possible to output a rhythm sound that matches the sense of the operator, and it is easy to control the intensity of the rhythm sound. be able to. As a result, it is possible to control the output of rhythm sounds over a wide dynamic range.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the instrument key according to the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, and FIG. 3 is a longitudinal sectional view showing a conventional instrument key. It is a diagram. 4... First sensor sheet, 6... Second sensor sheet, 10... Key top, 11... Press projection, 12...
...Press spring, 13... Weight. Figure 2 Figure 3

Claims (1)

[Scope of Claims] An operating element; a weight that provides inertia to the operating element; an elastic body provided at the lower part of the operating element to provide a restoring force to the operating element; and an elastic body provided at the lower part of the operating element. An instrument key comprising an actuator section arranged in the upper and lower layers, and sheet-like switches arranged in two layers, upper and lower, wherein the elastic body or the actuator is connected to the upper sheet-like switch of the sheet-like switches arranged in the two layers. A notch is provided for operating the lower sheet switch, and one of the elastic body and the actuator operates the lower sheet switch, and the other operates the upper sheet switch. Instrument key.