JP2007249141A - Electronic percussion instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic percussion instrument which can accurately detect strength of percussion. <P>SOLUTION: A shell part 2 has a fitting part 2c for assembling to a stand etc., for percussion instrument formed projecting from the shell part 2, and a rod hole 2f into which a rod type support of the stand etc., is inserted is formed in the fitting part 2c. A head sensor 21 and a rim sensor 31 are arranged inside the cylinder formed by a head support part 2b on the side opposite to the side of the fitting part 2c across the center part of the cylinder forming the shell part 2. The head sensor 21 is located on a support plate 11 extended on two supports erected on the bottom part of the shell part 2, and the rim sensor 31 is stuck to a bottom part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic percussion instrument, and more particularly to an electronic percussion instrument that can accurately detect the intensity of a hit.

  Conventionally, various electronic percussion instruments have been proposed, and for example, there is a so-called electronic drum imitating an acoustic drum. This electronic drum is provided with a sensor that detects vibrations of the head and the like due to impact, and is configured to control a sound source based on a detection signal of the sensor and generate a musical sound corresponding to the impact.

  These electronic drums are required to have a good feeling when hitting the striking surface with a stick or the like and a repulsive force from the striking surface. A drum head formed of mesh or mesh is covered, and a considerable amount of tension is applied to the drum head.

  In the performance of an acoustic drum, in addition to a normal performance in which only the striking surface (head) is hit, the performance range is expanded by a so-called rim shot performance method. There are generally two types of rim shots: an open rim shot that strikes the rim and the hitting surface (head) at the same time to produce a unique harmonic overtone effect, and only the rim. There is a closed rim shot that produces a percussive sound.

Therefore, as a conventional electronic percussion instrument, a head as a striking surface disposed on the upper surface of the hollow body, a head sensor for detecting vibration caused by hitting the head, and vibration caused by hitting the rim are detected. There has been proposed a rim sensor that is configured to be able to reproduce a rim shot based on detection signals from these two sensors (for example, Patent Document 1).
JP 2004-198657 A

  However, in the electronic percussion instrument disclosed in Patent Document 1, a head sensor is disposed in the approximate center of the body, and the head sensor detects vibration via a cushion provided between the head sensor and the center. When hitting directly above the cushion, an extremely large output is obtained, and the output detected by the sensor decreases as the distance from the center of the head increases. Therefore, even if the player strikes with the same strength, the magnitude of the output obtained varies depending on the position where the player strikes. In the case of percussion instruments, a so-called dynamic range with a wide sound volume or a change in timbre is required depending on whether it is strongly struck or weakly struck, but if the magnitude of vibration detected differs depending on the striking position, There was a problem that it was difficult to ensure the dynamic range.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an electronic percussion instrument that can accurately detect the strength of a hit.

In order to achieve this object, an electronic percussion instrument according to claim 1 detects and outputs vibration caused by percussion, and includes a hollow cylindrical drum having a rim portion on the outer periphery and an inner periphery of the drum. A head having a flat surface disposed below the upper end of the rim portion, a mounting portion formed on the outer periphery of the barrel portion to hold the barrel portion, and the mounting portion sandwiching the central portion of the cylinder of the barrel portion And a head sensor for detecting the vibration of the head on the opposite side of the unit.

  An electronic percussion instrument according to a second aspect of the present invention is the electronic percussion instrument according to the first aspect, further comprising a rim sensor for detecting vibration of the trunk in the vicinity of the head sensor.

  The electronic percussion instrument according to claim 3 is a cylindrical head support member according to claim 1 or 2, which is in contact with an inner periphery of a lower surface of the head and is disposed inside a cylinder formed by the body. And an annular hoop that surrounds the outer periphery of the head and is disposed on the inner periphery of the barrel to apply tension to the head.

  According to a fourth aspect of the present invention, in the electronic percussion instrument according to the third aspect, the upper surface of the hoop is substantially flush with the upper surface of the head.

  The electronic percussion instrument according to claim 5 is the electronic percussion instrument according to claim 3 or 4, wherein the body and the head support member are integrally formed of resin.

  According to the electronic percussion instrument of claim 1, a hollow cylindrical drum having a rim portion on the outer periphery, a head having a flat surface disposed on the inner periphery of the drum and below the upper end of the rim portion; Since it has an attachment part formed on the outer periphery of the body part and holding the body part, and a head sensor that detects vibration of the head on the opposite side of the attachment part across the central part of the cylinder of the body, When the electronic percussion instrument is attached to the drum stand, the head sensor is disposed at a position close to the performer.

  Therefore, when the player hits the head while holding the stick or the like in the hand, the upper end of the rim is located at a position higher than the head surface, and therefore, the player hardly hits directly above or near the head sensor. Therefore, there is an effect that the striking force detected by the head sensor is not greatly different depending on the striking position and can be accurately detected.

  The drum stand is assembled with a plurality of electronic percussion instruments such as toms and cymbals, and vibrations hit by other electronic percussion instruments propagate to the drum stand, and the drum stand also vibrates. However, since the head sensor is disposed at a position far from the position where the drum stand is assembled, there is an effect that it is possible to prevent the head sensor from being affected by the vibration of the drum stand.

  According to the electronic percussion instrument of the second aspect, in addition to the effect achieved by the electronic percussion instrument of the first aspect, the rim sensor and the head sensor are arranged in the vicinity, so that the impact position of the head and the impact position of the rim are changed. Even if the ratio or difference between the output of the rim sensor and the output of the head sensor is almost constant, if only the head is hit, if only the rim is hit, if both the rim and head are hit, etc. There is an effect that it can be easily determined.

  The drum stand is assembled with a plurality of electronic percussion instruments such as toms and cymbals, and vibrations hit by other electronic percussion instruments propagate to the drum stand, and the drum stand also vibrates. However, since the rim sensor is disposed at a position far from the position where the drum stand is assembled, there is an effect that it is possible to prevent the rim sensor from being affected by the vibration of the drum stand.

  According to the electronic percussion instrument described in claim 3, in addition to the effect produced by the electronic percussion instrument described in claim 1 or 2, the cylinder is in contact with the inner periphery of the lower surface of the head and is disposed inside the cylinder formed by the body. And an annular hoop that surrounds the outer periphery of the head and that is disposed on the inner periphery of the barrel and imparts tension to the head, so that the tension applied to the head by the hoop is adjusted. In addition, the height of the upper end of the rim portion from the upper surface of the head can be kept constant. Therefore, there is an effect that a rim shot can be easily performed. That is, it is possible to prevent the performance from becoming difficult due to a change in the height of the upper end of the rim from the upper surface of the head.

  Further, since the hoop is disposed on the inner periphery of the barrel, the outer periphery of the head is reduced, and the size of the generally expensive head can be reduced, so that the cost can be reduced.

  According to the electronic percussion instrument of the fourth aspect, in addition to the effect achieved by the electronic percussion instrument according to the third aspect, the upper surface of the hoop is substantially flush with the upper surface of the head. It looks as if it forms a head surface. Therefore, there is an effect that the hitting surface feels larger than the surface of the actual head and the performance is easy.

  According to the electronic percussion instrument of the fifth aspect, in addition to the effect of the electronic percussion instrument of the third or fourth aspect, the body and the head support member are integrally formed of resin, so that they are manufactured at low cost. There is an effect that can be.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The electronic percussion instrument 1 of the present invention is an electronic percussion instrument called a “electronic drum” that is played using a stick or the like, and includes a sensor that detects vibration caused by percussion. A musical sound device (not shown) is configured to control a sound source based on a detection signal of the sensor and generate a musical sound corresponding to the hit, and the generated musical sound is transmitted to the speaker device via the amplifier device. The sound is emitted from.

  FIG. 1 is an external perspective view of an electronic percussion instrument 1 according to an embodiment of the present invention. First, an external configuration of the electronic percussion instrument 1 will be described with reference to FIG. As shown in FIG. 1, the electronic percussion instrument 1 mainly includes a trunk portion 2, a rim cover 3, a hoop 4, and a head 5.

  FIG. 2 is an exploded perspective view showing these members in an exploded state. The hoop 4 is fixed by screwing and fixing the head 5, and the rim cover 3 has an outer peripheral portion 2 a of the trunk portion 2. It is configured so that it can be assembled by being fitted in.

  The trunk | drum 2 is a member which makes the frame | skeleton of the electronic percussion instrument 1, and as shown in FIG. 2, it is formed in the substantially hollow cylindrical shape with the resin material, for example. The outer periphery of the body portion 2 is formed in a cylindrical shape by an outer peripheral portion 2a erected almost vertically from the bottom portion 2g (see FIG. 4), and a rim cover 3 is fitted around the upper end of the outer peripheral portion 2a. Configure the rim.

  On the inner periphery of the outer peripheral portion 2a, a cylindrical shape that is concentric with the outer peripheral portion 2a is provided upright from the bottom 2g, and the head support member 2b is integrally formed with the bottom 2g and the outer peripheral portion 2a. The head support member 2 b is supported by a plurality of ribs 2 d that are radiating from the center direction of the cylinder and are erected vertically to the bottom 2 g formed on the body 2. A circular hole 2h is formed at the center of the cylinder of the bottom 2g so that the air in the body 2 can freely go to and from the outside.

  The lower surface of the head 5 is brought into contact with the upper end circumference of the head support member 2 b, and an annular hoop 4 surrounds the outer circumference of the head while applying tension to the head 5 along the outer circumference of the head.

The rim cover 3 is a rubber cover that is fitted into the upper end of the periphery of the cylindrical body 2 and is covered with a relatively elastic rubber, whereas the body 2 is formed of a relatively hard resin. Thus, the hit feeling when the rim portion is hit with the stick belly or the like is improved. The rim portion described in the claims corresponds to a portion formed by the rim cover 3 and the outer peripheral portion 2a.

  The hoop 4 includes a bolt hole 4b into which the engagement bolt 7 is inserted into a hoop body 4a that contacts the annular head frame 5b of the head 5, and a bolt head storage hole 4c that stores the head of the engagement bolt 7. Is formed at a position obtained by dividing the circumference into six equal parts. Also, a female screw 2e into which the engagement bolt 7 is screwed into a position where the circumference is divided into six equal parts is formed inside the outer peripheral part 2a of the body part 2 and outside the head support member 2b. (See FIG. 3).

  The head 5 is a part configured as a striking surface that is struck by a stick or the like. It is configured to be bonded to a substantially annular head frame 5b.

  The engaging bolt 7 is a member that screw-couples the hoop 4 to the body portion 2 and applies tension to the head 5 by the hoop 4 and is made of steel.

  Here, when the head 5 is assembled to the electronic percussion instrument 1, first, the head 5 is placed on the head support member 2 b of the body 2 on the upper end side (upper side in FIG. 1), and the head 5 is respectively engaged with the bolt hole 4 b of the hoop 4. The mating bolts 7 are inserted, covered so as to cover the head frame 5 b of the head 5, and the respective engaging bolts 7 are screwed into the female screws 2 e formed on the body portion 2.

  As a result, the head 5 is sandwiched between the hoop 4 and the head support member 2 b, and the tension applied to the head 5 can be adjusted by tightening the engagement bolt 7. Further, when the rim shot is performed, the upper end of the outer peripheral portion 2a is hit and the hoop is not hit directly, so that the engagement bolt 7 is not loosened.

  A mounting portion 2c for assembling to a percussion instrument stand or the like is formed in the body portion 2 so as to protrude from the body portion 2 (lower side in FIG. 2), and a rod hole 2f into which a rod-like support such as a stand is inserted is formed. Yes. A mechanism for holding the inserted rod is formed in the rod hole 2f, and a handle 8 for driving the mechanism is provided. When the handle is turned to the right, the rod inserted into the rod hole 2f is clamped, and when the handle is turned to the left, the rod is opened.

  A head sensor 21 and a rim sensor 31 are disposed inside the cylinder formed by the head support member 2b on the opposite side of the mounting portion 2c with the central portion of the cylinder forming the body portion 2 interposed therebetween. The head sensor 21 is affixed on the support plate 11 stretched on two pillars erected from the bottom 2g (see FIG. 3) of the body 2, and the rim sensor 31 is affixed to the bottom 2g. It is worn.

FIG. 3 is a plan view showing the electronic percussion instrument 1 when the hoop 4 and the head 5 are removed. In FIG. 3, a stereo jack 9 for outputting an electrical signal detected by each of the head sensor 21 and the rim sensor 31 is provided on the upper left side of the center of the body portion 2.
. The electrical signals detected by the head sensor 21 and the rim sensor 31 are independently output by a stereo plug inserted into the stereo jack.

  FIG. 4 is a cross-sectional view showing a cross section when the electronic percussion instrument 1 is cut along a plane that passes through the axis of the engagement bolt 7 and is perpendicular to the hitting surface 5 a of the head 5. 4A is a plan view showing the position of the cross section of the cross-sectional view shown in FIG. 4B, and FIG. 4B is a cross-sectional view thereof.

  As shown in FIG. 4B, the rim cover 3 is fitted to the upper end of the body portion 2, and the striking surface 5a of the head 5 is disposed at a position lower than the upper end of the rim cover. The head frame 5 b of the head 5 abuts against the hoop body 4 a of the hoop 4, and the hoop 4 is pressed down by engaging the engagement bolt 7 with the female screw 2 e formed on the bottom 2 of the body 2.

  When the head 5 is assembled by the hoop 4 in this way, the upper surface of the head 5 and the upper surface of the hoop 4 are formed to be substantially flush with each other. As a result, the top surface of the head 5 and the top surface of the hoop 4 appear to form a striking surface, so that the player feels that the striking surface is wide and is easy to perform.

  Further, a bolt hole 4b into which the engagement bolt 7 is inserted is formed in the hoop 4 at a position where the circumference is divided into six equal parts, and a bolt head that houses the head of the engagement bolt 7 is located above the bolt hole 4b. Since the storage hole 4 c is formed, the head of the engagement bolt 7 does not protrude from the upper surface of the hoop 4. Therefore, the head of the engaging bolt 7 protrudes from the upper surface of the hoop 4 to prevent the player from feeling the hitting surface narrow.

  As described above, the head 5 is configured by adhering the striking surface member 5a made of a net-like or film-like material to the head frame 5b formed in a substantially annular shape when viewed from the front, and as shown in FIG. By striking the head frame 5b on the outer periphery of the head support member 2b, the striking surface member 5a as a striking surface is stretched on the upper end surface (upper side in FIG. 4) of the body portion 2. The head sensor 21 is in contact with the lower surface (lower side surface in FIG. 4) of the striking surface member 5a.

  Here, when the striking surface is configured by using the striking surface member 5a made of a net-like material, the air resistance of the striking surface can be reduced, so that it is possible to obtain a good striking feeling at the time of striking with a stick or the like. In addition, since the hitting sound is reduced, only the musical sound from the speaker device can be heard by the performer.

  Since the vibration of the striking surface member 5a due to striking propagates only within the striking surface member 5a, the vibration is hardly affected on the body 2. Therefore, the vibration of the striking surface member 5a is not affected by the head. It is detected only by the sensor 21 and is not erroneously detected by the rim sensor 31 described later. In addition, the tension | tensile_strength of the striking surface member 5a can be arbitrarily adjusted according to a player's liking and performance by changing suitably the screwing amount to the internal thread 2e of the engagement bolt 7. FIG.

  In the electronic percussion instrument 1 of the present embodiment, the rim portion formed on the body portion 2 does not have a function of applying tension to the head 5, and is configured to apply tension to the head 5 by the hoop 4 which is a separate member. Therefore, the height from the upper surface of the head 5 at the upper end of the rim portion is always kept constant, and the rim shot performance can be easily performed.

  Further, when the rim portion vibrates due to impact, if the outer periphery of the head 5 is surrounded by the rim portion as in the conventional case, the vibration is propagated to the head 5 and erroneously detected that the head 5 was hit. However, according to the present invention, since the rim portion is not in direct contact with the head 5, there is no erroneous detection as in the prior art.

  Next, the head sensor 21 and the rim sensor 31 will be described with reference to FIG. Fig.5 (a) is a top view which shows the position of the cross section of sectional drawing shown to (b), FIG.5 (b) is the sectional drawing.

  The head sensor 21 is a sensor device for detecting the vibration of the head 5, and includes a piezoelectric element 22, a cushioning double-sided tape, the piezoelectric element 22, and the like covered with a cushion member 23. The piezoelectric element 22 is a vibration detection sensor that converts vibration such as piezo into an electric signal, and is formed in a substantially disk-like body having an output signal line (not shown). Also, a cushion member 23 and a cushioning double-sided tape, which will be described later, are attached to the upper and lower surfaces of the piezoelectric element 22, respectively.

  The output signal line is connected to the stereo jack 9 (see FIG. 3), and the electrical signal from the piezoelectric element 22 is output to a musical sound device (not shown) via the stereo jack 9.

  The cushioning double-sided tape is a member for attaching the piezoelectric element 22 to the support plate 11 and is configured as a so-called double-sided tape in which an adhesive layer is laminated on the upper and lower surfaces of the cushion layer. This cushioning double-sided tape is formed in a substantially disc shape, and the piezoelectric element 22 is adhered to the support plate 11 by this cushioning double-sided tape.

  The cushion member 23 is a member for transmitting vibrations from the head 5 to the piezoelectric element 22, is formed in an approximately cylindrical shape from an elastic member such as a sponge, and is attached to the piezoelectric element 22. The cushion member 23 is formed as a cylindrical body having a diameter larger than that of the piezoelectric element 22, and is configured such that the upper surface of the cylindrical body abuts on the lower surface of the head 5 (striking surface member 5a). Therefore, since a wide contact area with the head 5 is ensured, variation in hitting sensitivity of the head sensor 21 is small, and performance can be improved.

  The head sensor 21 configured as described above is adhered to the support plate 11 with a cushioning double-sided tape while the upper surface of the cushion member 23 is in contact with the lower surface of the head 5.

  As described above, the rim sensor 31 is a sensor device for detecting the vibration of the outer peripheral portion 2a of the body portion 2. Like the head sensor 21, the rim sensor 31 is a piezoelectric element as a vibration detection sensor, and the piezoelectric element is connected to the bottom 2g. It mainly comprises a cushioning double-sided tape for sticking to. In addition, since the structure of these piezoelectric elements, cushioning double-sided tapes, etc. is the same as that of the case of the head sensor 21, the description is abbreviate | omitted.

  The rim sensor 31 is adhered to the upper surface side of the bottom 2g with a cushioning double-sided tape. The attachment position of the rim sensor 31 is in the vicinity (substantially directly below) of the head sensor 21 and is on the opposite side of the attachment portion 2c across the central portion of the cylinder forming the body portion 2.

  As described above, in the electronic percussion instrument 1, the head sensor 21 and the rim sensor 31 are on the opposite side of the center part of the cylinder forming the body part 2 from the mounting part 2 c formed on the outer periphery of the body part 2. Placed in position.

  When assembling the electronic percussion instrument 1 to a drum stand, the head sensor 21 and the rim sensor 31 are usually attached to a rod or the like extending toward the performer from a drum stand disposed in front of the performer. It is arranged at a position close to the person.

  When the performer hits the head while holding a stick or the like in the hand, the upper end of the rim is located at a position higher than the head surface, so that the player hardly hits directly above or near the head sensor 21. Therefore, the striking force detected by the head sensor does not vary greatly depending on the striking position and can be accurately detected.

  Further, since the rim sensor 31 is disposed in the vicinity of the head sensor 21, even when the head hitting position and the rim hitting position change, the ratio or difference between the output of the rim sensor and the output of the head sensor is substantially constant. Therefore, it is possible to easily determine whether only the head is hit, if only the rim is hit, or if both the rim and the head are hit.

  As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, in the above-described embodiment, the rim portion is formed by fitting the rubber rim cover 3 into the outer peripheral portion 2a that forms the outer periphery of the trunk portion 2. May be omitted.

1 is an external perspective view of an electronic percussion instrument according to an embodiment of the present invention. It is a disassembled perspective view of an electronic percussion instrument. It is the top view which removed the head and hoop of the electronic percussion instrument. It is sectional drawing in the cross section containing the engagement bolt of an electronic percussion instrument. It is sectional drawing of the sensor part of an electronic percussion instrument.

Explanation of symbols

1 Electronic percussion instrument 2 Torso
2a Outer peripheral part (part of rim part)
2b Head support member 2c Mounting portion 3 Rim cover (a part of the rim portion)
4 Hoop 5 Head 5a Impact member (part of the head)
7 Engagement bolt 21 Head sensor 22 Piezoelectric element 23 Cushion member 31 Rim sensor

Claims (5)

In electronic percussion instruments that detect and output vibration due to impact,
A hollow cylindrical body having a rim portion on the outer periphery;
A head having a flat surface disposed on the inner periphery of the body and below the upper end of the rim portion;
An attachment part formed on the outer periphery of the body part to hold the body part;
An electronic percussion instrument comprising a head sensor for detecting vibrations of the head on a side opposite to the attachment portion across a central portion of the cylinder of the trunk.   2. The electronic percussion instrument according to claim 1, further comprising a rim sensor for detecting vibration of the trunk in the vicinity of the head sensor. A cylindrical head support member that is in contact with the inner circumference of the lower surface of the head and is disposed inside the cylinder formed by the cylinder;
3. The electronic percussion instrument according to claim 1, further comprising an annular hoop that surrounds the outer periphery of the head and is disposed on the inner periphery of the body to apply tension to the head.   4. The electronic percussion instrument according to claim 3, wherein the upper surface of the hoop is substantially flush with the upper surface of the head.   5. The electronic percussion instrument according to claim 3, wherein the body and the head support member are integrally formed of resin.

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