JPS595912Y2 - electronic percussion instruments - Google Patents

Description

[Detailed description of the invention] This invention relates to an electronic percussion instrument that produces sound when struck.

Conventionally, electronic percussion instruments such as drums and other percussion instruments are equipped with pickups to amplify the detection output and produce sounds from speakers, but in general, percussion instruments themselves emit large volumes, which can cause howling. However, it could not be used effectively.

This invention was made in view of the above points, and its purpose is to provide an electronic percussion instrument that is small, easy to operate, and produces sound no matter what object it hits.

In order to achieve this purpose, this invention incorporates a pickup that converts mechanical displacement into an electrical signal in a predetermined part of the rod-shaped striking body other than the grip, and when struck, this vibration is detected by the pickup. The system generates an electrical signal, and a speaker produces sound in response to this electrical signal.

This invention will be explained in detail below based on the drawings.

FIG. 1 is a side sectional view of an embodiment of an electronic percussion instrument according to this invention.

A stick 1 as a striking body made of wood has a piezoelectric element 3 embedded in its tip opposite to the grip part 2, and a lead wire 5 is connected from the piezoelectric element 3 to a connecting terminal 4.

Although not shown, a cord is connected to the connection terminal 4 to connect to the electronic circuit.

When a drum or the like is struck with the tip of the stick 1, the impact is transmitted to the piezoelectric element 3 and a corresponding electric signal is generated.

This electrical signal is guided to an electronic circuit, subjected to appropriate processing, and produced by a speaker.

2 to 4 are side sectional views of other embodiments.

In the embodiment shown in FIG. 2, a connecting terminal 4a is provided at the rear end of the gripping portion 2 of the stick 1, and a piezoelectric element 3 is embedded in the tip on the opposite side as in the previous embodiment.

A lead wire 5a is then wired over the entire length of the stick 1 from the piezoelectric element 3 to the connection terminal 4a.

A cord is connected to the connection terminal 4a, but since it is located on the rear side of the grip section 2, it does not interfere with the performance and improves operability.

In the embodiment shown in FIG. 3, a piezoelectric element 3 is attached to the tip of the stick 1.
In addition to this, a piezoelectric element 3a is also embedded in the center part.

Lead wires 5b and 5C are wired between the connection terminal 4b provided near the grip portion 2 and the piezoelectric elements 3 and 3a.

Therefore, two cords are drawn out from the connection terminal 4b.

When the stick 1 is used to perform a rim shot on the drum, the piezoelectric element 3a detects the impact that hits the rim.

In the embodiment shown in FIG. 4, two piezoelectric elements 3a and 3b having different characteristics are embedded in the center of the stick 1.

A lead wire 5C is connected between the switch 6 with a connection terminal provided near the grip part 2 and the piezoelectric elements 3a and 3b.
and 5d are wired.

When the switch 6 is operated, the circuit is changed and the piezoelectric element 3
The output of either a or 3b is led from the cord to the electronic circuit.

FIG. 5 is a block circuit diagram of an electronic circuit for processing electrical signals from the stick of the embodiment of FIG.

The electrical signal from the piezoelectric element 3 is amplified by an amplifier 10, and then drives an oscillator 11 to generate a musical tone signal of a predetermined waveform at a predetermined frequency.

This musical tone signal passes through a tone color circuit 12, is shaped into a desired tone, and enters a mixing circuit 13.

The output from the mixing circuit 13 is amplified by an output amplifier 14 and output from a speaker 15.

The electrical signal from the piezoelectric element 3 is simultaneously amplified by an amplifier 16, and the envelope output controls the frequency of the oscillator 11, the passing frequency of the tone circuit 12, etc., thereby changing the sound.

For this reason, the sound changes in various ways depending on how the stick is struck.

On the other hand, the electric signal from the piezoelectric element 3a is also sent to the amplifier 16.
After being amplified and driving the oscillator 17 to generate a musical tone signal, the signal passes through the timbre circuit 18 and enters the mixing circuit 13.

A part of the electrical signal is amplified by an amplifier 19, and an oscillator 17,
Controls the tone circuit 18.

The musical tone signals generated by the electric signals from the piezoelectric elements 3 and 3a are mixed in the mixing circuit 13 to produce rich tones, which are emitted from the speaker 15.

FIG. 6 is a block circuit diagram of an electronic circuit for processing electrical signals from the stick of the embodiment of FIG. 4.

Components that are the same as those in FIG. 5 are given the same numbers, and explanations of their operations will be omitted.

By operating the switch 6, the piezoelectric element 3a or 3
b is selected and the electrical signal is sent to the amplifier 1G,
16.

By using piezoelectric elements 3a and 3b with different sensitivities, frequency characteristics, etc., it is possible to produce sounds of various tones.

Note that it is also possible to use the switch 6 in the stick of the embodiment shown in FIG. 3 and use the circuit shown in FIG. 6, or to use the stick in the embodiment shown in FIG. The circuit of Figure 5 may also be used.

Further, when using two sticks, the same stick may be used, or sticks of different embodiments may be used to provide variation.

Since vibrations are transmitted inside the stick, it goes without saying that it is possible to detect an impact without necessarily hitting the part where the piezoelectric element is embedded.

Furthermore, if the stick is made of Gokai resin, it will be easier to embed the piezoelectric element and lead wires.

It can also hit anything other than drums, and the sound changes depending on what is hit.

FIG. 7 is a side sectional view of another embodiment using a mallet.

A piezoelectric element 23 is built into the striking part 22 fixed to the tip of the handle 21 of the mallet 20 as a striking body, and a lead wire 24 from the piezoelectric element 23 passes through the handle 21 and connects to the handle 21. It is pulled out from the rear end of the grip part 25 of.

In this embodiment, since the striking part 22 has elasticity, it produces a softer sound than a stick.

FIG. 8 is a side sectional view of an embodiment in which conductive rubber is used for the pickup.

A ring-spherical conductive rubber 28 having an inner electrode 26 and an outer electrode 27 on the inner and outer surfaces is built into the striking part 22a fixed to the tip of the handle 21a of the mallet 20a.

Lead wires 24 a from both electrodes 26 and 27 are connected to the handle 21
It passes through the inside of the grip portion 25a and is connected to a connection terminal 29 provided at the rear end of the grip portion 25a.

When struck with the striking part 22a, the conductive rubber 28 contracts due to the pressure, the impedance between the inner electrode 26 and the outer electrode 27 changes, and an electric signal corresponding to the pressure is generated.

FIG. 9 is a sectional view of a main part of another embodiment, and FIG. 10 is a sectional view taken along line XX in FIG.

The striking part 22b fixed to the tip of the handle part 21b of the mallet 20b is made of conductive rubber 28a, and includes four pieces arranged at 90 degree intervals shaped like an arc plate. Electrodes 26a, 26b, 26C, 26d and four outer electrodes 27a facing these at a predetermined interval in the radial direction
, 27 b, 27 c, and 27 d are built in.

There is one inner electrode 26a, . . . in common, and each outer electrode 27a
A total of five lead wires 24b, one each from ,...
is wired inside the handle 21b.

Inside the striking part 22b, pickups made of electrode pairs and conductive rubber are independently arranged in four directions every 90 degrees with the direction of the handle part 21b as the central axis.

When the handle 21b is rotated and struck, an electric signal is generated from a different pickup every 90 degrees.

FIG. 11 is a block circuit diagram of an electronic circuit for processing electrical signals from the mallet in the embodiments of FIGS. 9 and 10.

An electrical signal generated by a pickup 30a consisting of an inner electrode 26a and an outer electrode 27a is amplified by an amplifier 31a and then applied to a voltage controlled oscillator (VCO) 32a.

Here, a musical tone signal with a frequency corresponding to the voltage of the input signal is generated, and this musical tone signal is passed through a voltage control filter (VCF) 33
A predetermined frequency division passes through a, and the voltage controlled amplifier (V
CA) 34 a, its amplitude is amplified.

Voltage control filter 33a and voltage control amplifier 34
The envelope of the electrical signal from the pickup 30a is added to a as a control signal.

Although the other pickups 30b, 30C, and 30d have the same circuit structure, they produce slightly different sounds depending on the pickups or circuits.

Musical tone signals from these four pickups are mixed by a mixing circuit 35, amplified by an output amplifier 36, and output from a speaker 37.

The above musical tone shaping circuit is similar to that of an electronic organ, but since the mechanical characteristics of a mallet are directly used in the envelope, musical tones with different tones and volumes can be freely produced depending on the way the instrument is struck.

Also, by changing the angle and selecting the pickup to be used, four types of sounds can be produced.

Furthermore, even if you use the same pickup with the same mallet, you can further change the sound by adjusting the electronic circuit.

In each of the above embodiments, electric signals are guided to the electronic circuit using a stick or mallet cord, but a wireless method may also be used to increase operability.

As described above, according to the electronic percussion instrument of this invention, since the pickup is built into the striking side, it can be struck not only on drums but also on anything, and the intensity and tone of the sound can be freely varied depending on the striking method. Therefore, it is possible to produce subtle changes in the sound.

Furthermore, it has many excellent effects, such as the ability to produce a variety of sounds by installing multiple pickups or switching between them with a switch.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of one embodiment of an electronic percussion instrument according to this invention, FIGS. 2 to 4 are side sectional views of other embodiments, and FIG. 5 is a block circuit diagram of the embodiment of FIG. 3. , FIG. 6 is a block circuit diagram of the embodiment shown in FIG. 4, FIGS. 7 and 8 are side sectional views of other embodiments, FIG. 9 is a sectional view of essential parts of another embodiment, and FIG.
The figure is a XX sectional view of FIG. 9, and FIG. 11 is a block circuit diagram of the embodiment shown in FIGS. 9 and 10. 1...Stick, 2...Gripping part, 3...
Piezoelectric element, 4... Connection terminal, 5... Lead wire.

Claims (5)

[Scope of utility model registration request] (1) A pickup that converts mechanical displacement into an electrical signal is built into a predetermined part of the rod-shaped striking body other than the grip, and when struck, the pickup detects this vibration and generates an electrical signal. An electronic percussion instrument characterized by producing sound from a speaker in response to electrical signals. (2) The electronic percussion instrument according to claim 1, wherein the striking body is stick-shaped. (3) The electronic percussion instrument according to claim 1, wherein the striking body is shaped like a mallet. (4) The electronic percussion instrument according to claim 1, wherein the pickup uses a piezoelectric element. (5) The electronic percussion instrument according to claim 3, wherein the pickup is made of conductive rubber.