JP2011227139A - Head device for electronic percussion instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head device for an electronic percussion instrument with improved hitting feeling and silence when a performer hits a hitting member.SOLUTION: A hitting member 11a having a hitting surface hit by the performer is provided. The hitting member 11a is formed into a filmy sheet shape. A disk-shaped vibration plate 11b is placed oppositely to the hitting surface of the hitting member 11a. A plurality of springs 11c are provided between the hitting member 11a and the vibration plate 11b. The hitting member 11a is fixed to a frame FR with the vibration plate 11b so as to cover the upper part of the plurality of springs 11c. At this point, the hitting member 11a elastically deforms and the form becomes a truncated cone-shaped opened downward so as to have a space internally. One ends in the expansion and contraction direction of the springs 11c are supported at the lower surface of an upper bottom portion 11a3 of the hitting member 11a, and the other ends are supported at the upper surface part of the vibration plate 11b. A sensor 11d for detecting vibration of the vibration plate 11b is installed at the center of the lower surface of the vibration plate 11b.

Description

  The present invention relates to a head device for an electronic percussion instrument such as an electronic drum or an electronic cymbal.

  Conventionally, an electronic percussion instrument simulating an acoustic drum is known as disclosed in Patent Document 1 below, for example. This electronic percussion instrument head device includes a striking member having a striking surface to be hit by a player and a sensor for detecting the strength of the hitting.

JP-A-9-244633

  However, in the above-mentioned conventional electronic percussion instrument head device, the striking member is formed in a plate shape with a hard rubber, and the striking feeling when hit with a stick is hard, and the hitting feeling like an acoustic drum cannot be obtained. It was. Further, when the striking surface of the striking member is hit, the volume of the sound emitted from the striking member is large, which is not preferable for performance.

  The present invention has been made to cope with the above problems, and an object of the present invention is to provide a head device for an electronic percussion instrument that has improved feel and quietness when a striking member is hit. In addition, in the description of each constituent element of the present invention below, in order to facilitate understanding of the present invention, reference numerals of corresponding portions of the embodiment are described in parentheses, but each constituent element of the present invention is The present invention should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals of the embodiments.

  In order to achieve the above object, the present invention is characterized by a striking member (11a) having a striking surface to be hit by a player, a diaphragm (11b) disposed opposite the striking member, and a striking member. A plurality of springs (11c) interposed between the diaphragms, supported by the striking member at one end in the expansion / contraction direction, and supported by the diaphragm at the other end, and assembled to the diaphragm to detect vibration of the diaphragm And a sensor (11d). In this case, the spring constant may be increased as the amount of deformation increases from the start of deformation of the spring. Further, the spring constant in the second region having a larger deformation amount than the first region may be made larger than the spring constant in the first region having a small deformation amount from the start of the deformation of the spring.

  In the head device for an electronic percussion instrument configured as described above, when the striking member is hit, the hit portion of the hitting member is mainly elastically deformed, and the spring of the hit portion is deformed to hit the hitting member. Generate repulsive force against. Thereby, the hit feeling of an acoustic drum can be simulated. In addition, the entire striking surface does not vibrate, but the hit part mainly vibrates, so that the volume of the sound emitted from the striking member can be reduced. Then, a part of the impact caused by the impact is absorbed by the spring, and the remaining impact is transmitted to the diaphragm via the spring, so that the diaphragm vibrates. The vibration of the diaphragm is detected by a sensor as a trigger signal for generating percussion instrument sounds. In an electronic percussion instrument to which the head device is applied, the trigger signal is used to control the generation of percussion instrument sounds, the tone color of the generated percussion instrument sounds, the volume, and the like.

  Another feature of the present invention resides in that the density of springs in the central portion is larger than that in the peripheral portion of the striking surface. When playing a percussion instrument, the center is often hit rather than the periphery of the hitting surface. Therefore, if comprised as mentioned above, durability of a striking member can be improved.

  Another feature of the present invention is that the spring constant of the spring disposed at the center of the striking surface is made smaller than the spring constant of the spring disposed at the peripheral portion of the striking surface. According to this, since the hit feeling when hitting the central portion can be made softer than the hit feeling when hitting the peripheral portion of the hitting surface, the hit feeling due to the difference in hitting position like an acoustic drum. Can be simulated.

1 is an overall block diagram of an electronic percussion instrument to which a head device according to an embodiment of the present invention is applied. It is a vertical side view of the head apparatus of FIG. FIG. 3 is a front view of a spring of the head device of FIG. 2. FIG. 3 is a characteristic diagram illustrating characteristics of a spring of the head device of FIG. 2. It is a top view which shows the state which concerns on the modification of this invention and attached the spring to the diaphragm which provided the spring support part in the grid | lattice form. FIG. 10 is a longitudinal side view of a head device according to another modification of the present invention in which a spring is bonded to a diaphragm. It is a front view of the spring of the head device concerning the further another modification of the present invention. It is a characteristic view which shows the characteristic of the spring of FIG. 6A. It is a front view of the spring of the head device concerning the further another modification of the present invention. It is a characteristic view which shows the characteristic of the spring of FIG. 7A. FIG. 10 is a longitudinal side view of a head device in which a spring and rubber are integrally formed according to still another modification of the present invention. It is a characteristic view showing the relationship between the amount of deformation of the striking surface of the acoustic drum and the repulsive force.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall block diagram of an electronic percussion instrument to which a head device 11 according to an embodiment of the present invention is applied. The electronic percussion instrument includes a head device 11, a panel operator 12, an operator interface circuit 13, a display 14, a sound source circuit 16, a sound system 17, a computer unit 18, a storage device 19, and an external interface circuit 21.

  The head device 11 is hit by a stick or a player's hand to instruct generation of a musical tone signal. The panel operator 12 is provided on the operation panel of the electronic percussion instrument and is operated by the performer's hand to set the musical tone characteristics such as the tone color, volume, and effect of the generated musical tone signal, and the operation of the entire electronic percussion instrument. Is for setting.

  The head device 11 and the panel operator 12 are connected to an operator interface circuit 13 connected to a bus 22. Then, performance information representing the operation of the head device 11 and the panel operator 12 is supplied to the computer unit 18 described later via the operator interface circuit 13 and the bus 22. The display 14 is composed of a liquid crystal display (LCD), and displays characters, figures, and the like on the display screen. The display on the display 14 is controlled by the computer unit 18 via the bus 22.

  The tone generator circuit 16 includes a waveform memory WM that stores a plurality of waveform data, reads the waveform data designated by the CPU 18 a from the waveform memory WM, generates a digital musical tone signal, and supplies the digital musical tone signal to the sound system 17. The sound system 17 is a D / A converter that D / A converts the digital musical tone signal supplied from the sound source circuit 16 into an analog musical tone signal, an amplifier that amplifies the converted analog musical tone signal, and the amplified analog musical tone signal. A speaker that converts the signal into an output is provided.

  The computer unit 18 includes a CPU 18a, a timer 18b, a ROM 18c, and a RAM 18d connected to the bus 22, respectively. The CPU 18a supplies information necessary for sound generation to the tone generator circuit 16 in accordance with performance information supplied from the operator interface circuit 13 and the external interface circuit 21. In particular, the CPU 18a responds to performance information generated by the player's hitting of the head device 11 and performance information supplied from an external device via the external interface circuit 21 or performance information stored in the storage device 19 and reproduced. The sound source circuit 16 is instructed to generate sound.

  The storage device 19 includes a large-capacity nonvolatile recording medium such as an HDD, FDD, CD-ROM, MO, and DVD, and a drive unit corresponding to each recording medium, and stores various data and programs. Reading is possible. These data and programs may be stored in the storage device 19 in advance, or may be taken in from the outside via the external interface circuit 21. Various data and programs stored in the storage device 19 are read by the CPU 18a and used to control the electronic percussion instrument. The external interface circuit 21 includes a MIDI interface circuit and a communication interface circuit. This external percussion instrument can be connected to other external devices compatible with MIDI such as other electronic music devices and personal computers, and can be connected to a communication network such as the Internet. Connectable.

  Next, the configuration of the head device 11 according to the present invention will be described in detail. As shown in FIG. 2, the head device 11 includes a striking member 11a that is hit by a player. The striking member 11a is formed into a thin film-like sheet by cloth, rubber or the like. The striking member 11a is assembled to the frame FR so as to cover the upper portions of a plurality of springs 11c, which will be described later, and has a truncated cone shape opened downward so as to have a space inside. That is, through holes 11a1 are provided at equal intervals in the peripheral direction of the striking member 11a, and the peripheral part of the striking member 11a is pulled downward by the screw 11a2 passed through the through hole 11a1. The striking member 11a is stretched and elastically deformed as a whole to form a truncated cone shape. The upper bottom portion 11a3 of the hitting member 11a having the truncated cone shape is hit by the player. As will be described in detail later, the diaphragm 11b is sandwiched between the striking member 11a and the frame FR, and the upper bottom portion 11a3 of the striking member 11a and the diaphragm 11b face each other. The frame FR is formed in a bowl shape with resin, and supports various components of the head device 11. Note that the frame FR is not limited to resin, and may be made of metal, for example. Further, the shape of the frame FR is not limited to a bowl shape, and may be, for example, a cylindrical shape with a closed bottom surface.

  The diaphragm 11b is formed in a disc shape with resin. The vibration plate 11b includes a vibration part 11b1 formed in a circular shape and a flange 11b2 provided continuously from the outer periphery to the outside of the vibration part 11b1. The diameter of the vibration part 11b1 is the same as the diameter of the upper bottom part 11a3 of the striking member 11a. Further, the diameter of the flange 11b2 is the same as the diameter of the lower end portion of the striking member 11a which is elastically deformed and has a truncated cone shape. A plurality of spring support portions 11b3 that respectively support the lower ends of the plurality of springs 11c are provided on the upper surface of the vibration portion 11b1. As shown in FIGS. 3A and 3B, the spring 11c is a coil spring having the same diameter from the upper end to the lower end, and the amount of deflection is proportional to the biasing force. The spring support part 11b3 is a countersink provided on the upper surface of the vibration part 11b1, and the inner diameter of the countersink is set to be the same as the outer diameter of the spring 11c. The spring support portions 11b3 are provided at equal intervals on the upper surface of the vibration portion 11b1. The lower end portion of the spring 11c is inserted into the spring support portion 11b3, and the spring 11c is supported by the spring support portion 11b3. This prevents the springs 11c from interfering with each other by preventing the springs 11c from moving laterally on the diaphragm 11b. The upper end of the spring 11c is supported by the upper bottom portion 11a3 of the striking member 11a. As described above, the striking member 11a is stretched and elastically deformed when it is assembled to the frame FR so as to cover the upper portion of the spring 11c. Accordingly, the upper ends of the springs 11c are in contact with the lower surface of the upper bottom portion 11a3 of the striking member 11a in a state where each spring 11c is slightly compressed from the free length. Thus, the spring 11c is arrange | positioned at equal intervals at the whole striking surface of the striking member 11a. Further, the striking direction of the striking member 11a matches the expansion / contraction direction of the spring 11c. The spring support portion 11b3 may be provided by cutting or may be provided by molding. Moreover, the diaphragm 11b is not restricted to resin, For example, metal may be sufficient. In this case, the spring support portion 11b3 may be provided by cutting or by casting. Moreover, you may provide by press work.

  A through hole 11b4 is provided in the flange 11b2 at the same position as the through hole 11a1 of the striking member 11a, and the screw 11a2 passed through the through hole 11a1 and the through hole 11b4 is provided between the striking member 11a and the frame FR. The diaphragm 11b is sandwiched and fixed.

  A sensor 11d for detecting the vibration of the diaphragm 11b is assembled at the center of the lower surface of the diaphragm 11b. The sensor 11d includes a piezoelectric element that converts vibration into voltage. The sensor 11d is connected to the operator interface circuit 13, and the detection result of the sensor 11d is supplied to the CPU 18a via the operator interface circuit 13.

  When the performer strikes the upper bottom portion 11a3 of the striking member 11a with a stick or hand, the striking member 11a is elastically deformed mainly at the hit portion. And the spring 11c arrange | positioned under the elastically deformed part of the striking member 11a deform | transforms, and a repulsive force is generated. A part of the impact caused by the impact is absorbed by the spring 11c, and the remaining impact is transmitted to the diaphragm 11b to vibrate the diaphragm 11b. The vibration of the diaphragm 11b is detected by the sensor 11d, and the detection result is supplied to the CPU 18a. The CPU 18a instructs the tone generator circuit 16 to generate a tone signal according to the detection result. In response to an instruction from the CPU 18 a, the tone generator circuit 16 reads out the corresponding musical sound waveform from the waveform memory, synthesizes a digital musical sound signal, and supplies it to the sound system 17. The sound system 17 emits a musical sound corresponding to the supplied digital musical sound signal.

  In the head device 11 of an electronic percussion instrument configured as described above, when the striking member 11a is struck, the spring 11c of the struck portion is mainly deformed to generate a repulsive force against the percussion, thereby hitting the acoustic drum. The feeling can be simulated. Then, the striking member 11a is formed in a thin film shape so that the mainly struck portion is elastically deformed. That is, the entire upper bottom portion 11a3 of the striking member 11a does not vibrate, but the hit portion mainly vibrates. Therefore, the volume of the sound emitted from the upper bottom portion 11a3 of the striking member 11a can be reduced at the time of striking. Further, since a part of the impact generated at the time of impact is absorbed by the spring 11c, the impact transmitted to the diaphragm 11b is attenuated. Therefore, since the vibration of the diaphragm 11b is small, the volume of the sound emitted from the diaphragm 11b can be reduced.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

  In the above-described embodiment, the spring support portion 11b3 is configured by countersink, but the spring support portion 11b3 is not limited to this, and may be formed in a concave shape into which the lower end of the spring 11c can be inserted. For example, as shown in FIG. 4, the spring support portion 11b3 may be configured by providing vertical walls protruding vertically from the upper surface of the vibration plate 11b in a lattice shape to form a plurality of rectangular recesses. In this case, the interval between the opposing vertical walls of the spring support portion 11b3 is set to be equal to the diameter of the spring 11c, and the side surface on the lower end side of the spring 11c and the vertical wall of the spring support portion 11b3 are brought into contact with each other. You can do it. Further, the lower end of the spring 11c may be bonded to the upper surface of the vibration plate 11b without providing the spring support portion 11b1, so that the spring 11c does not move laterally on the vibration plate 11b. In this case, as shown in FIG. 5, a vertical wall 11b5 that protrudes perpendicularly from the upper surface of the diaphragm 11b and surrounds the outer periphery of the vibration part 11b1 is provided so that the adhesive does not flow out from the diaphragm 11b. . Even if comprised in these, the effect similar to the said embodiment is acquired.

  In the above embodiment, the spring 11c is a coil spring. However, the spring 11c is not limited to this and may be a spring that is compressed and generates a repulsive force. For example, a leaf spring may be used. However, in the case of a coil spring, since it expands and contracts in the same direction as the striking direction (that is, the vertical direction), there is no need to secure a space for the deformation of the spring around the spring. However, in the case of a leaf spring, it is necessary to provide a space around the spring in advance in order to avoid a part of the spring projecting laterally due to deformation and interfering with an adjacent spring. . Therefore, it is preferable to employ a coil spring.

  Further, in the above embodiment, the spring 11c is a coil spring having the same diameter from the upper end to the lower end and in which the deflection amount and the biasing force are proportional. However, as shown in FIGS. 6A and 6B, a coil spring that is formed so that the diameter gradually increases from the upper end toward the lower end, and the rate of change of the urging force increases as the deflection amount increases may be employed. . When this coil spring is compressed from the open state, the wire rods at the lower end portion where the coil diameter is large and easily deformed come into contact with each other. When the compression is further performed, the wire rods at the intermediate portion and the wire rods at the upper end portion come into contact with each other. Thereby, the change rate (namely, spring constant) of the urging | biasing force with respect to the change of the deflection amount of a spring can be changed continuously.

  Further, as shown in FIGS. 7A and 7B, in the first region in which the pitch of the upper end portion is wide and the pitch of the lower end portion is narrow and the deflection amount is small, the first change rate with respect to the change of the deflection amount. In the second region where the urging force changes and the deflection amount is larger than that of the first region, the urging force changes at a second change rate larger than the first change rate with respect to the change in the deflection amount. May be adopted. When the coil spring is compressed from the open state, the upper end and the lower end are contracted in the first region. Then, at the boundary between the first region and the second region, the wire members at the lower end are in contact with each other, the lower end is not further contracted, and only the upper end is contracted in the second region. Thereby, the spring constant can be changed in two stages. Note that the spring constant may be changed in more stages. For example, a coil spring in which the spring constant is changed in three stages by forming the pitch of the intermediate part narrower than the pitch of the upper end part and wider than the pitch of the lower end part may be adopted.

  In the above modification, the spring constant is changed in multiple stages by changing the pitch in multiple stages, but the pitch is constant and the wire diameter of the wire forming the coil is changed in multiple stages. Thus, the spring constant may be changed in multiple stages. For example, a coil spring in which the wire diameter at the upper end is thick and the wire diameter at the lower end is thin may be employed. When the coil spring is compressed from the open state, the upper end portion and the lower end portion are initially contracted as in the spring shown in FIG. 7A, but the linear thin lower end portion is more easily contracted. Thereafter, the wires at the lower end are brought into contact with each other, and when further compressed, only the upper end is contracted. Therefore, the spring constant can be changed in two stages. The spring constant may be changed continuously or stepwise by changing any two or all of the coil diameter, pitch, and wire diameter continuously or stepwise. If comprised as mentioned above, since a spring characteristic can be closely approached to the repulsive force characteristic (refer FIG. 9) showing the relationship between the deflection amount of the striking surface of an acoustic drum, and a repulsive force, the hit feeling of the striking member 11a is made into an acoustic drum. It can be closer to the feeling of hitting.

  Further, as shown in FIG. 8, rubber, sponge, etc. (shaded portions in FIG. 8) that can be elastically deformed by striking the spring and the striking member 11a may be integrally formed. According to this, the hit | damage member 11a of the mainly struck part is elastically deformed. Since the spring, rubber, sponge and the like disposed below the elastically deformed portion of the striking member 11a are elastically deformed to generate an appropriate repulsive force, it is possible to simulate the hitting feeling of the acoustic drum. Furthermore, since the impact can be efficiently absorbed by rubber, sponge, etc., the vibration of the diaphragm 11b can be further suppressed, and the volume of the sound emitted from the diaphragm 11b can be further reduced.

  Further, in the above embodiment and its modifications, the springs 11c are arranged at equal intervals. However, this configuration is not necessarily required. For example, the density of the springs 11c at the center may be larger than the peripheral edge of the upper bottom portion 11a3 of the striking member 11a. The upper bottom part 11a3 is often hit at the center part rather than the peripheral part. Therefore, if comprised as mentioned above, durability of the striking member 11a can be improved.

  Moreover, in the said embodiment and its modification, all the some springs 11c were made common. However, a spring having a small spring constant may be disposed at the center of the upper bottom portion 11a3, and a spring having a large spring constant may be disposed at the peripheral portion of the upper bottom portion 11a3. According to this, compared with the hit feeling of the peripheral part of the hit | damage member 11a, the hit feeling of a center part can be softened, and the difference in hit feeling by the difference in hitting position like an acoustic drum can be simulated.

DESCRIPTION OF SYMBOLS 11 ... Head apparatus, 11a ... Impact member, 11b ... Diaphragm, 11c ... Spring, 11d ... Sensor

Claims (5)

A striking member having a striking surface to be struck by the performer;
A diaphragm disposed opposite the striking member;
A plurality of springs interposed between the striking member and the diaphragm, supported by the striking member at one end in a telescopic direction, and supported by the diaphragm at the other end;
A head device for an electronic percussion instrument, comprising: a sensor assembled to the diaphragm and detecting vibrations of the diaphragm. The electronic musical instrument head device according to claim 1,
A head device for an electronic percussion instrument, wherein the density of the springs in the central portion is larger than the peripheral portion of the striking surface. The electronic percussion instrument head device according to claim 1 or 2,
A head device for an electronic percussion instrument, wherein a spring constant of a spring disposed at a central portion of the striking surface is made smaller than a spring constant of a spring disposed at a peripheral portion of the striking surface. The electronic percussion head device according to any one of claims 1 to 3,
A head device for an electronic percussion instrument, wherein the spring constant increases as the amount of deformation increases from the start of deformation of the spring. The electronic percussion head device according to any one of claims 1 to 3,
A head device for an electronic percussion instrument, wherein a spring constant in a second region having a larger deformation amount than the first region is set larger than a spring constant in a first region having a small deformation amount from the start of deformation of the spring.

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