JPH019991Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an electronic percussion instrument that generates a desired musical tone based on the impact or swinging of a rod-shaped impacting body.

〔background〕

As a conventional electronic percussion instrument of this type, for example, the one shown in Japanese Utility Model Publication No. 59-5912 is known. According to this electronic percussion instrument, a piezoelectric element is embedded in the tip of the drum stick, and the vibration generated when the drum stick is struck can be converted into an electric signal by the piezoelectric element and extracted. A desired musical tone can be emitted from the speaker based on the impact of the impacting body.

However, in the conventional electronic percussion instruments mentioned above, the piezoelectric elements that generate the electric signals for musical tone generation are relatively expensive, so not only do the electronic percussion instruments themselves become expensive, but the piezoelectric elements are susceptible to changes over time. Consequently, they tend to deteriorate easily, making it impossible to obtain an electrical signal at a predetermined level over a long period of time, and thus making it impossible to obtain a desired musical tone. Furthermore, according to conventional electronic percussion instruments, a predetermined electrical signal is detected from the piezoelectric element only when the drum stick is struck, and the desired musical tone is thereby obtained. The drawback was that it was not possible to perform percussion instruments with a wide variety of variations, such as striking or shaking the drumstick to obtain a desired musical tone.

Therefore, in order to eliminate these conventional drawbacks, the applicant of the present invention has proposed that a rod-shaped striking body be turned on at least when the striking body is struck or oscillated to produce a desired musical tone from a musical sound generating device. An application has been filed for an electronic percussion instrument provided with musical tone trigger means for generating a key-on signal. The electronic musical instrument related to the application has a simpler configuration than conventional ones,
Although it is inexpensive, it is possible to reliably obtain a stable key-on signal, has a long life, and allows percussion instruments to be played in a wide variety of variations.

[Purpose of invention]

This invention is a further improvement of the electronic percussion instrument according to the above-mentioned application, and its purpose is to provide an electronic percussion instrument that can generate musical tone trigger signals with a simpler structure.

[Key points of the idea]

In order to achieve this purpose, this idea
A fixed contact member is disposed within the stay main body constituting the striking body, a conductive elastic member is attached to this contact member via an insulating member, and the free end of this elastic member is fixed at a constant distance from the contact member during normal operation. separated by a distance of
The key point is that the musical tone trigger means is configured by being set so as to be able to make electrical contact with the contact member when the striking body hits or swings. That is, the musical tone triggering means of the electronic percussion instrument according to this invention has a structure in which an elastic member as a movable contact is supported on a fixed contact member (carriage type).

〔Example〕

An embodiment of this invention will be described below based on the drawings.

<Configuration> FIG. 1 is an overall view of an electronic percussion instrument according to an embodiment of this invention. In this drawing, the striking body side of the musical tone generator is exaggerated and drawn in a large size.

In FIG. 1, a rod-shaped striking body 1 that is struck or swung during a performance is formed to have approximately the same size and appearance as a conventional drumstick.

This striking body 1 has a hollow cylindrical stay main body 2.
A cap 3 that is fitted into the rear end of the main body, a conical rubber cap 4 that is placed over the tip and welded to the main body 2 via a hard synthetic resin 4F filled inside, and the tip of this cap 4. It is equipped with a rubber playing chip 5 attached to the. Inside the striking body 1, there is a switch TSW for triggering musical tones and a push button switch for changing timbres, which will be described in detail below.
SSWs are provided, and each line of a connecting cable C is connected to each terminal of these switches, so that the state of the switch can be transmitted to the musical tone generator.

The musical tone trigger switch TSW, which is an important element of the present invention, operates when the striking body 1 is struck or oscillated to generate a musical tone trigger signal.
This example is configured as follows. That is,
A bolt-like member 6 that functions as a fixed contact passes through a support 7 fixed to the stake body 2, and is inserted into the support 7 with its enlarged head 6H acting as a stopper and in contact with one surface of the support 7. Fixed. A cylindrical insulating member 8 is fitted around the bolt-like member 6 that protrudes from the opposite surface of the support 7, and in order to prevent the insulating member 8 from falling off due to vibration, A step 6S is formed in the diameter of the shaped member 6, and the insulating member 8 also has a complementary shape. Further, on the outer peripheral surface of the insulating member 8, a coil spring 9 is provided which acts as a movable contact.
The base 9R of is attached. The coil spring 9 and the bolt-like member 6 are in a coaxial relationship, so that the free end 9T of the coil spring 9 maintains a constant distance from the tip of the bolt-like member 6 under steady state conditions. However, when the striking body 1 hits or swings, the free end 9T of the coil spring 9 shakes, and as a result, comes into contact with the tip of the bolt-like member 6, as shown by the dotted line.

Whether this contact is caused by a relatively large impact when the tip 5 hits the striking surface or by a relatively small change in momentum during rocking is a design matter; It can be selected by appropriately selecting various constants (for example, spring constant, spring diameter, etc.) of TSW.

An important feature of this embodiment is that the musical tone trigger switch TSW can be configured with an extremely simple structure.

On the other hand, a push-button switch SSW for changing timbres makes it possible to switch the musical tones played even during a performance. The push button switch SSW in this example is configured as follows. That is, a key 10 is attached in a depressable manner to an opening in the stick main body 2 formed in the area where the player holds the stick, and a cross-shaped slit 10S is cut into the bottom of the key 10. The four flange pieces thus defined act as springs to maintain stable contact between the key flange and the elastic movable contact 11. In the normal state, this movable contact 11 is in the position shown in the figure and comes into contact with the fixed break contact 12b, but as the key 10 is pressed down, it is pushed down and separated from the break fixed contact 12b, and finally the make It makes electrical contact with the fixed contact 12m. As will be described later, different musical tones are selected when the movable contact 11 is in contact with the break fixed contact 12b and when it is in contact with the make fixed contact 12m. The above-mentioned musical sound generating device 15 can generate a predetermined musical sound based on the impact of the striking body 1, and also has a plurality of drum pads 16 provided on the upper part of the main body of the device.
A predetermined musical tone can be produced by pressing the keys, or by pressing each key provided on the keyboard section 17, as in the case of a normal keyboard instrument.

Next, a circuit configuration for generating a predetermined musical tone based on the impact of the impacting body 1 will be explained with reference to FIG. 2.

As shown in FIG. 2, the musical tone generator 15 includes an RS type flip-flop circuit (hereinafter referred to as a flip-flop circuit).
It's called "RSF/F." ) 18 are provided,
The set input terminal S of this RSF/F18 has a signal generated based on the ON operation of the musical tone trigger switch TSW when the above-mentioned hitting body 1 is hit without pressing the tone change push button switch SSW. This RSF/F18
is in the set state. The output terminal Q of this RSF/F18 is connected to a switch when the striking body 1 is struck.
Timer circuit 1 that measures the chattering time (t) from the time of generation of the first key-on signal output from the output terminal Q based on the ON operation of the TSW
9 is connected to the CPU (Central Processing Unit) 21 which controls the musical tone generator 20 to generate a predetermined musical tone based on the key-on signal.
is connected. The output terminal of the timer circuit 19 is connected to the output terminal of the striking body 1 in order to prevent unnecessary musical sounds from being generated due to the chattering phenomenon caused by the vibration of the coil spring 9 when the striking body 1 is struck once. When the first hit or the like of No. 1 is performed, a carry signal (reset signal) is output after a predetermined time, that is, a chattering time, based on the first key-on signal generated at that time. This carry signal is input to the reset input terminal R of the RSF/F18, so this
RSF/F18 enters the reset state and can again accept input from the switch TSW. As mentioned above, the timer circuit 19 counts the chattering time (t) from the time when the key-on signal is generated based on the first impact of the impacting body 1, etc., and this time interval (t) is , CPU21
It is set based on predetermined preset time value data (p) sent from. This time interval (t) is set in consideration of both the time interval required for repeated hits with the striking body 1 within a short period of time and the time interval of chattering. That is, if this time interval (t) is set too long without considering the time interval required for consecutive hits of the striking body 1, the RSF set based on the first key-on signal accompanying the striking of the striking body 1, etc. The set state of /F18 becomes correspondingly longer, so even if a second key-on signal occurs within a short time due to the chattering phenomenon, the second key-on signal will not be sent to the CPU 21 side. Therefore, it is possible to reliably prevent musical sounds from being generated from the musical sound generating section 20, which is convenient. Even in the case of repeated hits, a situation may arise in which the key-on signal associated with the second consecutive hit is not sent to the CPU 21 side, and therefore, based on the key-on signal, the musical tone generator 20 generates a predetermined musical tone accompanying the repeated hits. become unable to do so. Therefore, the time interval (t) of the time measurement operation of the timer circuit 19 is equal to or longer than the chattering time interval (t ₁ ),
The range is set to be less than or equal to the minimum time interval (t ₂ ) during general consecutive hits.

On the other hand, a signal generated while pressing the tone color change push button switch SSW is applied to the set input terminal of another RSF/F22, thereby placing this RSF/F22 in the set state. A timer circuit 23 is also associated with this RSF/F22, and the action of both of them nullifies instantaneous state changes of the tone trigger switch TSW to prevent chattering.

The CPU 21 enables the tone change by the tone change switch SSW, so when the stick body 2 is hit with the push button switch SSW released, one musical tone is triggered by the key-on signal, but the push button switch SSW is activated. When the stick main body 2 is struck while being pressed, the other musical tone is triggered by a key-on signal.

In this embodiment, the CPU 21 includes:
A switch 24 for variably controlling the time interval (t) between the timing operations of the two timer circuits 19 and 23 to an arbitrary time interval manually or by stepping on the foot.
is provided.

The above-mentioned musical sound generation unit 20 is a PCM sound source that uses a PCM (pulse code modulation) method to fixedly store a plurality of sound source data such as predetermined percussion instrument sounds and sampled sounds.
A ROM 25, an address control unit 26 that reads and controls the sound source data stored in the PCM sound source ROM 25 in accordance with control data from the CPU 21 based on a key-on signal generated when the striking body 1 hits, etc. The sound system 27 generates a corresponding predetermined musical tone based on sound source data read from the PCM sound source ROM 25 in accordance with control data from the address control section 26.

<Operation> Next, the operation of the electronic percussion instrument according to the embodiment having the above configuration will be explained.

First, before starting percussion performance, the tone selection switch 28 provided on the musical tone generator 15 is operated to select musical tones with different tones (for example, bass drum and high hat). Please specify.

Next, the player hits the ball using the tip 5 of the hitting body 1 as a hitting surface, but at this time, the player does not press the push button switch SSW for changing the tone color. This impact causes the coil spring 9 provided inside the striking body 1 to vibrate, and its free end 9T comes into electrical contact with the bolt-like member 6.
Then, along with the electrical contact, the musical tone trigger switch TSW, which is composed of the coil spring 9 and the bolt-like member 6, is turned on.
A predetermined electrical signal is output from this switch TSW. The electrical signal output from the switch TSW is
It is input to the set input terminal S of one RSF/F 18 in the musical tone generating device 15 via the connection cord C wired between the striking body 1 and the musical tone generating device 15,
This RSF/F18 is set to the set state. Therefore, in accordance with the set state, a key-on signal is output from the output terminal Q of the RSF/F 18, and the key-on signal is input to the timer circuit 19 and to the CPU 21. In contrast, the CPU
21 moves on to pronunciation processing, but in this case,
The push button switch SSW for tone switching is not pressed, and this is the key-on signal found when inspecting the RSF/F18, so one musical tone,
Here, the bass drum is designated, and this designation information is included in the tone control data for sound generation processing and is passed to the address control section 26. Therefore, the address control unit 26
outputs address control data to the PCM sound source ROM 25, and according to the address control data,
One sound source data stored in the PCM sound source ROM 25, that is, the sound source data of the bass drum sound, is read, and the sound source data is transferred to the sound system 27.
is input for. Therefore, the speaker SP (see Fig. 1) that constitutes this acoustic system 27
From this point on, the bass drum sound will be emitted.

On the other hand, when a key-on signal based on the impact of the striking body 1 is input to the timer circuit 19, the timer circuit 19 sets the time corresponding to the preset time value preset based on the operation of the switch 24 for setting the preset time value. 19 counts the time, and after counting the time, outputs a carry signal to the RSF/F18 to reset the RSF/F18.
By the way, when the striking body 1 is struck once, the coil spring 9 chatters with the bolt-shaped member 6 based on the striking force etc., and they come into electrical contact with each other, thereby causing the switch TSW to Multiple electrical signals may be output within a short period of time. However, even if such a situation occurs, the plurality of electrical signals output from the timer circuit 19 outputting the carry signal until the RSF/F18 enters the reset state will be used as the key-on signal from the RSF/F18. Since it is not output as
It is possible to prevent unnecessary musical sounds from occurring due to TSW chattering. Also, the above
After the reset state of RSF/F18, the first
If the second blow is repeated after the first blow, the electrical signal from the switch TSW will be
RSF/F18, which causes this RSF/
Since the key-on signal will be output from F18, the bass drum sound will be emitted from the speaker SP of the sound system 27 based on this key-on signal, similar to the operation described above.

Now, press the push button switch to change the tone while playing.
Let's consider a case where SSW is pressed and in that state, striking object 1 is struck. In this case, a key-on signal is generated and is input to the CPU 21 as before. However, this time, the push button switch SSW for tone switching is pressed, so the key-on signal is detected by the CPU 21 not by RSF/F18 but by RSF/F18.
Found when inspecting F22. Therefore
The CPU 21 includes musical tone designation information different from the previous one in musical tone control data for sound generation processing, and passes it to the address control section 26. For this reason, PCM sound source ROM
From 25, sound source data different from the previous one, that is, sound source data of a high-pitched sound, is read out, and therefore,
A high-pitched sound will be emitted from the speaker SP constituting the sound system 27. Incidentally, after a predetermined chattering time (t) has elapsed from the time when the key-on signal is generated, a carry signal (reset signal) is outputted from the timer circuit 23.
Setting the RSF/F22 to the reset state and waiting for the input of the next switch signal from the switch TSW is the same as in the previous case.

<Modifications> This invention is not limited to the above embodiments, and various modifications are possible.

For example, in the above embodiment, the push button 1 for switching timbres is
Although different musical tones are selected depending on whether 3 is pressed or released, the musical tones may be changed each time the key is pressed. It is also possible to select three or more types of sound sources.

Further, in each of the above embodiments, a case has been described in which a coil spring is used as an example of the conductive member, but the present invention is not limited to this example, and other elastic members such as a leaf spring can be used. For example, when using leaf springs, a plurality of leaf springs are arranged around the insulating member 8 at an angle, for example two leaf springs are arranged 90 degrees apart, and the impact of the striking body 1 is Depending on the direction, only one leaf spring can be configured to be able to contact the fixed contact member. In this way, multiple musical tone trigger switches can be configured using each leaf spring and a common fixed contact, and since the musical tone trigger switches only operate selectively, they can also serve as a tone selection function. Can be done.

[Effect of idea]

As detailed above, in this invention, the musical tone trigger means is a fixed contact member (preferably a rod-shaped member).
It has a structure in which a conductive elastic member is supported via an insulating member, and the free end of the elastic member is caused to shake due to the impact or swinging of the striking body, and is brought into electrical contact with a fixed contact member. The structure is very simple and the number of parts is small, making it suitable for mass production.

[Brief explanation of the drawing]

FIG. 1 is an overall view of an electronic percussion instrument according to an embodiment of this invention, in which the percussion body is shown in a sectional view and the musical tone generator is shown in a scaled-down perspective view, and FIG. 2 shows the configuration of the circuit of the embodiment. The figure is shown below. 1...Blowing body, 2...Static body, 6...
Bolt-shaped member, 8...Insulating member, 9...Coil spring, TSW...Switch for musical tone trigger.

Claims (1)

[Claims for Utility Model Registration] A key-on signal is generated in a rod-shaped striking body when the striking body is turned on at least when the striking body is struck or when the striking body is oscillated, causing a musical tone generating device to generate a desired musical tone. In an electronic percussion instrument provided with a musical sound trigger means, a fixed contact member is disposed within the stay main body constituting the striking body, a conductive elastic member is attached to the contact member via an insulating member, and the contact member is attached to the contact member via an insulating member. The tone triggering means is characterized in that the free end of the elastic member is separated from the contact member in a steady state and made electrically contactable with the contact member when the striking body is struck or swings. Electronic percussion instrument.