JPH0514310Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an electronic percussion instrument that generates an acoustic signal such as a desired percussion instrument sound or sampled sound based on the impact or swinging of an operating member.

[Background] As a conventional electronic percussion instrument of this type, for example, 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 acoustic signal can be emitted from the speaker based on the impact of the impacting body.

However, in the conventional electronic percussion instrument described above, the piezoelectric element that generates the electric signal for sounding the acoustic signal is relatively expensive, so not only does the electronic percussion instrument itself become expensive, but the piezoelectric element They tend to deteriorate with time, making it impossible to obtain an electrical signal at a predetermined level for a long period of time, and thus making it impossible to obtain a desired acoustic signal. Furthermore, according to conventional electronic percussion instruments, a predetermined electrical signal is detected from the piezoelectric element only when the drumstick is struck, and the desired acoustic signal is thereby obtained. However, the drawback is that it is not possible to perform percussion instruments with a wide variety of variations, such as obtaining a desired acoustic signal by striking or shaking the drumstick.

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 equipped with a musical tone trigger means for generating a key-on signal (for example, Japanese Patent Application No. 120724/1982 = Japanese Patent Application No. 7076/1983).
The electronic musical instrument related to the application has a relatively simple configuration;
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 the invention] This invention is a further improvement of the electronic percussion instrument related to the above-mentioned application, and includes acoustic signals such as percussion sounds and sampled sounds (hereinafter referred to as "musical sounds") produced when the striking body is struck. To provide an electronic percussion instrument that has the following characteristics, can be easily operated, and can be freely switched in a format that does not interfere with the performance.

[Main points of the invention] In order to achieve such an objective, this invention provides a system that when at least one of a striking force or a swinging force of a predetermined level or more is applied to an operating member capable of a striking operation or a swinging operation. , the electric signal generating means is brought into an electrically conductive state, and based on this electric signal is generated for starting acoustic signal generation; and the electric signal is generated based on the electric signal generated from the electric signal generating means. The key point is that the operating member is provided with acoustic characteristic selection means for selecting the characteristics of the acoustic signal to be generated from the means.

[Example] Hereinafter, an example of this invention will be described based on the drawings.

<Structure> FIG. 1 is a partially sectional perspective view showing 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 drum stick.
The striking body 1 includes a cylindrical stick body 2, a dome-shaped tip 3 fixed to the tip of the stick body 2, and an open end of a grip portion on the base end side of the stick body 2. It consists of a screwed cap 4. A mounting plate 6 fixed at a predetermined position by a positioning member 5 is disposed inside the stake body 2, and an insulating holding member 7 is fixed to the upper surface of the mounting plate 6. On both sides of this holding member 7, conductive contact members 8, 8 are arranged so as to face each other, and screws 9 are provided.
It is fixed by... In addition, this holding member 7
A conductive coil spring 10 is press-fitted into the through hole 7a formed at the center of the spring 10. The conductive coil spring 10 vibrates when the striking body 1 is struck or the like and comes into electrical contact with the contact members 8, 8. This coil spring 10
acts as a movable contact member for the fixed contact members 8, 8, and therefore this coil spring 1
0 and the contact members 8, 8 constitute a switch section 11 for triggering musical tone. That is, the tips 8a and 8a of the contact member 8 are butted against each other to form an annular opening, and the free end 10a of the coil spring 10 is located at the center of this annular opening, and the vibration of the coil spring 10 causes the free end 10a to become a contact point. Part 8
It is in contact with the annular tip of. Moreover, between the positioning member 5 and the chip 3,
A rubber cushioning member 12 is interposed to effectively absorb rattling of the positioning member 5. Furthermore, a push button 13 for switching tone colors is provided on the outer circumferential surface of the stick body 2 in a region that is held by the player during performance. push button 13
When pressed, the internal bridge contact member 13 bridges the fixed contacts 13a and 13c (see FIG. 2). As will be described later, depending on whether or not the push button 13 is pressed, the type of musical tone to be produced is switched. Coil spring 1 of the above-mentioned musical tone trigger switch section 11
0 and the contact 13c of the timbre switching push button 13 are commonly connected to the common wire of the connection cord 14 from the musical tone generator 15, and the contact members 8, 8 of the switch section 11 are electrically connected to the second wire of the connection cord 14. , push button 1
The other contact point 13a of No. 3 is electrically connected to the third wire of the connection cord 14. The above musical tone generator 15
In addition to being able to generate a predetermined musical tone based on the impact of the striking body 1, it is also possible to generate a predetermined musical tone by pressing a plurality of drum pads 16 provided on the upper part of the device main body. As in the case of a keyboard instrument, a predetermined musical tone can be generated by pressing each key provided on the keyboard section 17.

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. 3.

As shown in FIG. 3, the musical tone generator 15 includes an RS type flip-flop circuit (hereinafter referred to as
It's called "RSF/F." ) 18 are provided,
The set input terminal S of this RSF/F 18 receives a signal generated based on the ON operation of the musical tone trigger switch section 11 composed of the coil spring 10 and the contact member 8 when the above-mentioned striking body 1 hits. An electrical signal is input, and this RSF/F 18 enters a set state. The output terminal Q of this RSF/F 18 has a chattering time (from the time of generation of the first key-on signal outputted from the output terminal Q based on the ON operation of the switch section 11 when the striking body 1 hits, etc.) timer circuit 19 for timing t)
and a CPU (Central Processing Unit) 21 that controls the musical tone generator 20 to produce a predetermined musical tone based on the key-on signal. The output terminal of the timer circuit 19 is connected to the output terminal of the striking body 1 in order to prevent the generation of unnecessary musical sounds due to the chattering phenomenon caused by the vibration of the coil spring 10 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
The RSF/F 18 enters the reset state and becomes able to accept input from the switch unit 11 again. 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 ,CPU
It is set based on predetermined preset time value data (p) sent from 21. 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 timing operation of the timer circuit 19 is set to a range that is greater than or equal to the chattering time interval (t ₁ ) and less than or equal to the minimum time interval (t ₂ ) during a typical continuous hit.

On the other hand, a signal generated while the tone color switching push button 13 is pressed is applied to the set input terminal of another RSF/F 22, thereby placing this RSF/F 22 in the set state. A timer circuit 23 is also associated with this RSF/F 22, and the action of both of them nullifies instantaneous state changes of the push button 13 to prevent chattering. According to this example,
The output of RSF/F22 is used as a timbre instruction signal. That is, the CPU 21 selects one of the two types of tones currently available as the generated sound depending on whether the output of the RSF/F 22 is "H" or "L".

Therefore, when the stick body 2 is struck with the push button 13 released, one of the musical tones is triggered by the key-on signal, whereas when the stick body 2 is struck with the push button 13 pressed, When this happens, the other musical tone will be triggered by the 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.
The sound source data stored in the ROM 25 and the PCM sound source ROM 25 is read out in accordance with the control data from the CPU 21 based on the key-on signal generated when the striking body 1 hits, etc. and the tone instruction signal from the push button 13. According to the controlling address control section 26 and the control data from this address control section 26,
Based on the sound source data read from the PCM sound source ROM 25, the sound system 27 generates a corresponding predetermined musical tone.

<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 3 of the hitting body 1 as a hitting surface, but at this time, the player does not press the tone color switching push button 13. This impact causes the coil spring 10 provided inside the impact body 1 to vibrate, causing its free end 10 to vibrate.
a makes electrical contact with the contact member 8. Then, as a result of the electrical contact, a musical tone triggering switch section 11 made up of a coil spring 10 and a contact member 8 is turned on, and a predetermined electrical signal is output from this switch section 11. The electrical signal output from the switch section 11 is transmitted to one of the musical tone generators 15 through a connection cord 14 wired between the striking body 1 and the musical tone generator 15.
Input to set input terminal S of RSF/F18,
This RSF/F18 is brought into a set state. Therefore, depending on the set state, RSF/F18
A key-on signal is output from the output terminal Q of the CPU 21, and the key-on signal is input to the timer circuit 19 as well as to the CPU 21. On the other hand,
The CPU 21 moves on to sound generation processing, but in this case, the tone switching push button 13 is not pressed;
Therefore, RSF/F22 is in a reset state,
The output timbre instruction signal indicates "L". Therefore, the CPU 21 confirms that the level of this tone instruction signal is "L", specifies one of the musical tones, here the bass drum, as the musical tone to be generated, and uses this designation information as musical tone control data for the generation process. It is passed to the address control unit 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, sound source data of the bass drum sound. The sound source data is input to the audio system 27. Therefore, the bass drum sound is emitted from the speaker SP (see FIG. 1) that constitutes this acoustic system 27.

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/F 18 to reset the RSF/F 18. By the way, when the striking body 1 is struck once, the coil spring 10 chatters with the contact member 8 based on the striking force etc., and they come into electrical contact with each other, and as a result, the switch part 11
Multiple electrical signals may be output in 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/F 18 enters the reset state will not be transmitted to the RSF/F 18.
Since the key-on signal is not outputted from the F18, it is possible to prevent unnecessary musical tones from being generated due to the chattering of the switch section 11. Further, after the RSF/F 18 has been reset, if a second blow is made consecutively following the first blow of the striking body 1, the electric signal from the switch section 11 is set to the RSF/F 18. , As a result, a key-on signal is output from this RSF/F 18, so similar to the operation described above, the sound system 2
The bass drum sound will be emitted from speaker SP 7.

Now, while playing, press push button 13 for tone switching,
Let us consider the case where the striking body 1 is struck in this state. In this case, a key-on signal occurs and it
The points input to the CPU 21 are the same as before. However, this time, the tone switching pushbutton 3 is pressed, so the RSF/F22 is placed in the set state,
The output timbre instruction signal indicates "H". Therefore, the CPU 21 confirms that the tone instruction signal is at a different level from the previous one, and the CPU 21 includes musical tone designation information different from the previous one in the musical tone control data for the sound generation process, and sends it to the address control section 26.
give it to Therefore, different sound source data from the PCM sound source ROM 25, that is, sound source data of a high-pitched sound, is read out, and therefore, a high-pitched sound is emitted from the speaker SP constituting the audio system 27. Note that after a predetermined chattering time (t) has elapsed from the time when the key-on signal is generated, a carry signal (reset signal) is output from the timer circuit 19 and the RSF/F 18 is reset. Waiting for the input of the switch signal 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 a long conductive wire may be used.

Furthermore, regarding the prevention of chattering, in the above embodiment, a chatter prevention function is incorporated into the hardware interface consisting of a timer and RSF/F, but chatter may be prevented by a program. Alternatively, it is also possible to provide the switch structure itself with a structure that is less likely to cause chattering. For example, as shown in FIG. 4, a buffer member 29 that absorbs the restoring force of the coil spring 10 is disposed on the side where the coil spring 10 hits the contact member 8 and rebounds, so that the coil spring 10 that once hits the contact member 8 returns to the contact member 8. Avoid hitting member 8. Or instead of the buffer member 29,
The coil spring 10 may be prevented from hitting the contact member 8 more than once in a row by providing a permanent magnet piece and using the attractive force of the magnet piece to suppress the vibration of the coil spring 10.

Furthermore, in the above embodiment, a connection cord is wired between the striking body and the musical tone generating device for supplying electrical signals from each switch section to the musical tone generating device, but in order to increase operability, Alternatively, a wireless system may be adopted, in which the striking body is provided with a transmitter that transmits FM radio waves, and the musical tone generator is provided with a receiver that receives the radio waves.

In the above embodiment, a case has been described in which the switch part of the musical tone trigger is turned on by the vibration generated when the striking body is struck, and musical tones of different predetermined tones are generated, but the present invention is not limited to this example. Even when the striking body is swung at a predetermined speed, the same actions and effects as in the embodiment described above can be obtained.

[Effects of the invention] As is clear from the above description, in this invention, the electric signal generating means provided on the operating member (the striking body 1 in the embodiment) capable of performing a striking operation or a swinging operation An insulating holding member fixed inside the member (in the embodiment, holding member 1
5) and a conductive member (in the embodiment, the coil spring 10) whose base end is fixedly held by the holding member and whose free end protrudes from the holding member.
and a contact member (in the embodiment, contact members 8, 8) whose base end is fixedly held by the holding member and whose free end is held with a predetermined gap from the free end of the conductive member. Therefore, with a relatively simple configuration, an electric signal for starting acoustic signal generation can be reliably generated by simply performing a striking operation or a swinging operation on the operating member. For this reason, unlike conventional electronic percussion instruments that use piezoelectric elements to generate electrical signals to start acoustic signal generation, there is no deterioration phenomenon caused by changes over time, and stable electrical signal generation is achieved reliably and continuously. Therefore, a desired acoustic signal can be obtained for a long period of time. In addition, the operating member is provided with an acoustic characteristic selection means (in the embodiment, a timbre selection switch button 13) for selecting the characteristic (for example, timbre) of the acoustic signal to be generated from the sound generating means. Therefore, the person performing the striking or swinging operation selects the characteristics of the acoustic signal to be generated from the sound generating means by using the acoustic characteristic selection means provided on the operating member held by the person himself/herself. An acoustic signal can be generated with the selected characteristics based on the electrical signal generated from the electrical signal generating means. Therefore, it is possible to quickly and arbitrarily generate an acoustic signal with desired characteristics even during a performance without having to select the characteristics of the acoustic signal to be generated one by one on the panel of the instrument body.

[Brief explanation of drawings]

Fig. 1 is a partially omitted exploded perspective view showing an embodiment of an electronic percussion instrument according to this invention, Fig. 2 is a partially omitted cross-sectional view of the electronic percussion instrument, and Fig. 3 is a connection between a striking body and a musical sound generating device. A circuit diagram to explain the relationship,
FIG. 4 is a sectional view of an example of the structure of a switch of a striking body having a chattering prevention mechanism. 1...Blowing body, 2...Static body, 8...
Contact member, 10... Coil spring, 13...
Tone switching push button, 15... musical tone generator.

Claims (1)

[Claims for Utility Model Registration] (1) (A) An operating member that can be operated by impact or swing; (B) Sound generating means for generating a predetermined sound signal; (C) Inside the operating member. a fixed insulating holding member; a conductive member having a proximal end fixedly held by the holding member and a free end protruding from the holding member; and a proximal end fixedly held by the holding member. a contact member whose free end is held with a predetermined gap from the free end of the conductive member, and an operating force of at least one of a striking force or a swinging force of a predetermined level or more is applied to the operating member. When the conductive member and the contact member are electrically connected, the electrical signal generating means generates an electrical signal for starting generation of the acoustic signal to be generated from the sound generating means in response to this. An electronic percussion instrument, characterized in that the operating member is provided with acoustic characteristic selection means for selecting characteristics of an acoustic signal to be generated from the sound generation means. (2) The electronic percussion instrument according to claim 1, wherein the acoustic characteristic selection means is a timbre selection means for selecting the timbre of the acoustic signal to be generated from the sound generation means. (3) The operating member includes a rod-shaped stick body in which the electric signal generating means is provided, a striking portion formed on the outer peripheral surface of one end of the stick body, and a striking portion formed on the outer peripheral surface of the other end of the stick body. 2. The electronic percussion instrument according to claim 1, further comprising a grip section having a grip section.