JP2015138196A - Electronic percussion instrument blow detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic percussion instrument blow detection device in which difference of detection sensitivity due to a blow position is small, and excellent in responsiveness of the detection.SOLUTION: An electronic percussion instrument blow detection device 1 comprises: an elastomer vibration body 3 which vibrates by receiving blow force; and a planar sensor 4 contacting the vibration body 3 and detecting vibration of the vibration body 3, a direction F of the blow force received by the vibration body 3 and a surface of the sensor 4 being almost parallel to each other. Preferably the vibration body 3 is formed of a foam material. Preferably the vibration body 3 has a disk-shape having a blow surface on a top surface, and the sensor 4 is disposed along a peripheral surface of the vibration body 3. Preferably the peripheral surface of the vibration body 3 on which the sensor 4 is disposed has one or more salients, and the peripheral surface contacts the surface of the sensor 4 by the salients. Preferably, three or more sensors 4 are disposed on the peripheral surface of the vibration body 3 with almost equal angle intervals.

Description

  The present invention relates to a hit detection device for an electronic percussion instrument.

  A hit detection device for an electronic percussion instrument that generates an electronic sound similar to the sound of a natural percussion instrument is an electronic drum pad that is used in an electronic drum and detects a hit on a hitting surface by a sensor. Such an electronic drum pad includes a frame-shaped support, a sheet-shaped vibrating body having an outer periphery held by the support and having a striking surface on the surface, and a metal laminated on the back side of the vibrating body. A device having a plate and a sensor disposed on the back side of the metal plate is known (see Japanese Patent Application Laid-Open No. 2008-181165). In an electronic drum using such a conventional pad for an electronic drum, when the striking surface of the vibrating body is hit, the vibrating body vibrates, and the vibration is transmitted to the sensor through the metal plate, and the vibration is detected by the sensor. An electronic sound is generated based on the transmitted detection signal.

  In the conventional electronic drum pad, the magnitude of vibration transmitted to the sensor, that is, the detection sensitivity of the striking force by the sensor is likely to vary greatly depending on the striking position. In other words, in the conventional electronic drum pad, when hitting directly above the sensor, the hitting force acts directly as a force compressing the sensor, so the detection signal becomes large, but when hitting a position away from the sensor The detection signal becomes small.

  In addition, in the conventional electronic drum pad, vibration in the striking force direction of the vibrating body is difficult to attenuate, so the first vibration wave due to the strike is extracted from the detection signal of the sensor, that is, the vibration waves after the second wave are removed. There is a case where an operation is performed. However, in an electronic drum using a conventional electronic drum pad that performs such arithmetic processing, a delay occurs between the time when the electronic drum pad is hit for the arithmetic processing and the time when an electronic sound is emitted. In this regard, if the back surface of the metal plate is supported, the vibration of the vibrating body can be quickly attenuated, but there arises a problem that the difference in detection sensitivity depending on the striking position is further increased.

JP 2008-181165 A

  In view of the above disadvantages, an object of the present invention is to provide a percussion detection device for an electronic percussion instrument that has a small difference in detection sensitivity depending on a percussion position and is excellent in detection responsiveness.

  An invention made in order to solve the above-mentioned problems is for an electronic percussion instrument comprising an elastomeric vibrating body that vibrates in response to a striking force, and a plate-shaped sensor that comes into contact with the vibrating body and detects the vibration of the vibrating body. The impact detection device is characterized in that a direction of impact force received by the vibrator and a surface of the sensor are substantially parallel.

  The hit detection device for electronic percussion instrument detects pressure fluctuations along the propagation direction of vibration due to the hitting force, that is, longitudinal waves, because the hitting force direction and the surface of the sensor are substantially parallel as described above. Since the longitudinal wave travels faster than the transverse wave, the time until the sensor outputs a detection signal is short. Further, since the longitudinal wave is easily attenuated, the influence of the reflected wave is small and the calculation load is small. For this reason, the hit detection device for electronic percussion instrument is excellent in responsiveness. In addition, since the electronic percussion instrument hit detection device is difficult to detect the force in the direction of the hitting force, the hitting force directly increases the detection value of the sensor no matter where the striking force is applied. hard. For this reason, the electronic percussion instrument impact detection device can relatively reduce the difference in detection sensitivity depending on the impact position.

  The vibrator is preferably made of a foam material. By forming the vibrating body from the foamed material in this manner, the vibration attenuation rate of the vibrating body is increased and the influence of the reflected wave is reduced, so that it is easy to detect the vibration wave directly propagating from the impact.

  When the electronic percussion instrument hit detection device is an electronic drum pad, the vibrating body may have a disk shape having a hitting surface on an upper surface, and the sensor may be disposed along a peripheral surface of the vibrating body. By arranging a plurality of sensors on the circumferential surface of the vibrating body in this way, it is possible to construct an electronic drum that has a small difference in detection sensitivity depending on the striking position and is excellent in detection responsiveness.

  The peripheral surface of the vibrating body on which the sensor is disposed may have one or a plurality of convex portions, and the convex portions may be in contact with the surface of the sensor. By providing the convex portion on the peripheral surface of the vibrating body in this manner, the vibration wave of the vibrating body is concentrated on the convex portion, so that the hit detection sensitivity of the hit detection device for an electronic percussion instrument can be increased.

  Three or more of the sensors may be arranged at substantially equal angular intervals on the peripheral surface of the vibrating body. In this way, by providing three or more sensors at equal intervals, it is possible to specify the striking position from these detection signals.

  As described above, the hit detection device for an electronic percussion instrument of the present invention detects longitudinal waves generated by hitting and propagating in the vibrating body in the direction perpendicular to the hitting force direction, so that the difference in detection sensitivity depending on the hitting position is small. In addition, the response of detection is excellent.

1 is a schematic plan view of a hit detection device for an electronic percussion instrument according to one embodiment of the present invention. It is typical sectional drawing of the hit detection device for electronic percussion instruments of FIG. FIG. 2 is a schematic plan view of a hit detection device for an electronic percussion instrument different from FIG. 1. It is typical sectional drawing of the hit detection device for electronic percussion instruments of FIG. FIG. 4 is a schematic plan view of a hit detection device for an electronic percussion instrument according to an embodiment different from FIGS. 1 and 3. It is typical sectional drawing of the hit detection device for electronic percussion instruments of FIG. FIG. 7 is a schematic cross-sectional view of a hit detection device for an electronic percussion instrument according to an embodiment different from those of FIGS. FIG. 8 is a schematic cross-sectional view of a percussion detection device for an electronic percussion instrument that is different from the embodiment of FIG. 2, FIG. 4, FIG. 6 and FIG. FIG. 9 is a schematic cross-sectional view of a percussion detection device for an electronic percussion instrument according to an embodiment different from those of FIGS. 2, 4, 6, 7, and 8. FIG. 10 is a schematic side view of a hit detection device for an electronic percussion instrument according to an embodiment different from those of FIGS. 2, 4, 6, 7, 8, and 9.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First embodiment]
The electronic drum pad 1 shown in FIGS. 1 and 2 is an embodiment of an electronic percussion instrument hit detection device according to the present invention. The electronic drum pad 1 is used in an electronic drum and is hit with a drum stick or the like to detect this hit. is there.

  The electronic drum pad 1 includes a circular plate-shaped support body 2, an elastomeric disk-shaped vibration body 3 bonded to the surface of the support body 2, and substantially the same along the outer peripheral surface of the vibration body 3. And four plate-like sensors 4 arranged at angular intervals.

<Support>
The support 2 is formed of a rigid material, for example, a metal plate such as an iron plate, a steel plate, a galvanized steel plate, or an aluminum plate. The support 2 is typically a flat plate shape, but may be formed with a concave surface or a convex surface. Moreover, the thickness of the support body 2 is not particularly limited, but may be, for example, 0.5 mm or more and 3 mm or less.

<Vibrating body>
The vibrating body 3 is formed of an elastomer, but may have a single layer structure or a multilayer structure. The upper surface of the vibrating body 3 is a striking surface that is struck by a drum stick or the like, and vibrates by being struck by this striking surface. The striking surface is typically a flat surface, but may be convex or concave as long as it is suitable for striking with a drumstick or the like. The direction of the striking force received by the striking surface is not the direction of movement when the drum stick is struck, but is interpreted as the direction perpendicular to the striking surface as indicated by arrow F in FIG. When the striking surface is a curved surface, the direction perpendicular to the striking surface at the center of gravity in plan view is taken as the striking force direction.

  In the present embodiment, the vibrating body 3 is formed of a foamed elastomer having a substantially constant thickness, and is bonded to the support 2 by the foaming pressure of the foamed elastomer composition. In addition, it does not specifically limit as average thickness of the vibrating body 3, For example, it is 5 mm or more and 20 mm or less.

  The rebound resilience of the vibrating body 3 is preferably 70% or more. In general, the higher the rebound resilience, the greater the propagation speed of longitudinal waves. Thus, by setting the rebound resilience coefficient of the vibrating body 3 to be equal to or higher than the lower limit, the hit detection speed can be further improved. The “rebound resilience” is a value measured according to JIS-K-6255 (2013).

  The lower limit of the peel adhesion strength between the vibrating body 3 and the support 2 is preferably 5 N / 25 mm, and more preferably 7 N / 25 mm. When the peel adhesion strength is less than the lower limit, the bonding state between the vibrating body 3 and the support 2 becomes insufficient, and the vibrating body 3 and the support 2 may be carelessly peeled off. The “peel adhesion strength” is a value measured according to JIS-K6854-1 (1999).

  As the elastomer constituting the vibrating body 3, a known material such as polyurethane or silicone is used. As a specific example, a composition containing a polyurethane combined with a polyol and an isocyanate as a main component and further containing a foaming agent for obtaining foamability can be mentioned. It should be noted that the material for forming the vibrating body 3 is a curing agent, a colorant, a light stabilizer, a heat stabilizer, an antioxidant, an antifungal agent, a difficult agent, and the like, as long as the material of the vibrating body 3 is not impaired. Various additives such as a flame retardant may further be contained.

  The polyol is not particularly limited as long as it can form a urethane bond with isocyanate, and examples thereof include polyether polyol, polyester polyol, polycarbonate polyol, and polycaprolactone polyol.

  The number average molecular weight of the polyol is preferably 200 or more and 10,000 or less. If the number average molecular weight is less than the lower limit, the reaction proceeds rapidly, so that desired molding may become difficult, and the flexibility of the vibrator 3 may be insufficient. On the other hand, when the number average molecular weight exceeds the upper limit, the viscosity of the vibrating body forming material may be too high and molding may be difficult.

  The isocyanate is not particularly limited as long as it can form a urethane bond with a polyol, and examples thereof include tolylene diisocyanate, diphenylmethane diisocyanate, and hexamethylene diisocyanate.

  The foaming agent is not particularly limited as long as it can be foamed when the vibrating body 3 is molded, and examples thereof include a pyrolytic foaming agent that foams by heat. As the thermal decomposition type foaming agent, for example, a hydrazide type such as oxybenzenesulfonyl hydrazide (OBSH) or paratoluenesulfonyl hydrazide, or an azo type such as azodicarbonamide (ADCA) or azobisformamide may be used. it can. The decomposition temperature of the pyrolytic foaming agent is preferably 100 ° C. or higher and 240 ° C. or lower in consideration of the ease of forming the vibrating body 3 and the like.

  The lower limit of the expansion ratio of the vibrating body 3 is preferably 1.2 times, and more preferably 1.5 times. The expansion ratio means a value obtained by dividing the volume of the elastomer composition after foaming assumed when the liquid elastomer composition is foamed under atmospheric pressure by the volume of the actually molded foamed elastomer. . On the other hand, the upper limit of the expansion ratio is preferably 5.5 times, and more preferably 2.5 times. If the foaming ratio is less than the lower limit, the foaming pressure is too small, so that the bonding state of the vibrating body 3 with the support 2 or a protective layer described later may be insufficient. On the contrary, when the expansion ratio exceeds the upper limit, the pressure in the mold becomes too large, the mold cannot withstand the pressure, and the vibrating body 3 cannot be molded. In addition, the cost of manufacturing a mold that can withstand the pressure increases.

  Moreover, as a minimum of the porosity of the said vibrating body 3, 30% is preferable and 40% is more preferable. On the other hand, the upper limit of the porosity is preferably 80%, and more preferably 70%. If the porosity is less than the lower limit, the vibrating body 3 may become too hard, and a favorable feel of the electronic drum pad 1 may not be obtained. On the other hand, when the porosity exceeds the upper limit, the vibrating body 3 becomes too soft and the strength against impact is insufficient. “Porosity” is a value calculated by (resin specific gravity / apparent density) × 100. Here, the “resin specific gravity” can be measured by the “Pycnometer method” defined in JIS-K-7112 (1999) by finely pulverizing the foamed elastomer, and the “apparent density” is JIS-K-7222. (2005).

  Moreover, the vibrating body 3 may have a protective layer on the surface side. As this protective layer, for example, a sheet that can be stretched and has a restoring force when stretched can be used. Moreover, it is preferable that a protective layer can be expanded-contracted in any direction (two-dimensional arbitrary direction) of the sheet plane direction (two-way stretch).

  As such a protective layer, for example, a sheet-like body including a knit material (knitted fabric formed by knit yarn) and a coating layer covering the back surface of the knit material can be used.

  As the knit material, a material that can be expanded and contracted in any direction of the sheet plane direction is suitably used. Natural fibers can be adopted as the fibers constituting the knit material, but synthetic fibers are preferably used from the viewpoint of the strength of the knit material. Examples of the synthetic fiber include fibers made of polyolefins such as polyethylene and polypropylene, polyamides such as polyester, polyacryl and nylon, and copolymers or modified products thereof. These fibers can be used alone, or a plurality of types of fibers can be used in combination.

  Furthermore, the lower limit of the fineness of the yarn made of the fibers (the yarn for knitting the knit material) is preferably 140 dtex, more preferably 150 dtex. On the other hand, the upper limit of the fineness is preferably 200 dtex, and more preferably 190 dtex. If the fineness is less than the lower limit, the strength of the knit material may be insufficient. On the contrary, when the fineness exceeds the upper limit, the knit material becomes too thick, and there is a possibility that the feel of hitting may be impaired. “Yarn fineness” means a value defined in JIS-L-0101 (1978).

  Moreover, as a minimum of the gauge of the said knit material, 50G is preferable and 55G is more preferable. On the other hand, the upper limit of the gauge is preferably 70G, and more preferably 65G. If the gauge is less than the lower limit, the strength of the knit material may be insufficient. On the contrary, if the gauge exceeds the upper limit, the knit material may be expensive, and the electronic drum pad 1 may be expensive. The “knit material gauge” is a numerical value representing the number of needles per inch of a knitting machine that knits a knit material.

  Furthermore, since the gauge of the knit material is within the above range, and the fineness of the yarn of the knit material is within the above range, the knit material composed of the knit material has sufficient strength and the protective layer can be expanded and contracted. Sex is also secured.

  Moreover, as a minimum of the average thickness of the said knit material, 50 micrometers is preferable and 100 micrometers is more preferable. On the other hand, the upper limit of the average thickness of the knit material is preferably 800 μm, and more preferably 400 μm. If the average thickness of the knit material is less than the lower limit, the strength of the knit material may be insufficient. On the other hand, if the average thickness of the knit material exceeds the upper limit, the knit material becomes too thick, and the feeling of hitting may be impaired. The “average thickness of the knit material” is a value measured according to JIS-L-1096 (2010).

  The upper limit of the initial Young's modulus of the knit material is preferably 10 MPa, and more preferably 1 MPa. If the Young's modulus exceeds the above upper limit, the surface layer of the electronic drum pad 1 becomes too hard, and a striking feel may be obtained, and a favorable feel may not be obtained. The “Young's modulus” is a value measured according to JIS-L-1096 (2010).

  The coating layer is not particularly limited as long as it is a layer that covers the back side of the knit material. For example, the coating layer can be formed by heat-sealing a stretchable film that can be heat-sealed to the back surface of the knit material. The coating layer can also be formed by applying a coating layer forming material on the back surface of the knit material and drying it.

  The back surface of the coating layer is bonded to the surface of the vibrating body 3 as described above. Specifically, a liquid vibrating body forming material (foamed polyurethane composition) is supplied to the back surface of the coating layer, and the vibrating body forming material is cured to bond the surface of the vibrating body 3 and the back surface of the coating layer. Is done. In other words, the coating layer prevents the vibrating body forming material from being impregnated on the knit material side of the coating layer when the liquid vibrating body forming material is supplied, and also when the vibrating body forming material is cured. It is a layer to be joined to.

  The lower limit of the peel adhesion strength between the protective layer and the vibrator 3 is preferably 5 N / 25 mm, and more preferably 7 N / 25 mm. If the peel adhesive strength is less than the lower limit, the bonding state between the protective layer and the vibrator 3 is insufficient, and the protective layer and the vibrator 3 may be carelessly peeled off. The “peel adhesion strength” is a value measured according to JIS-K6854-1 (1999).

  The coating layer is not particularly limited as long as it is made of resin or rubber, but considering the bonding with the vibrating body 3, a layer formed of the same kind of material as the vibrating body 3 (however, the foaming property may be reduced). Preferably not). Specifically, when the vibrating body 3 is urethane as described above, the coating layer is preferably made of polyurethane resin or polyurethane rubber. More specifically, as the coating layer forming material, it is preferable to use a material containing polyol and isocyanate (but not including a foaming agent) as in the case of the vibrator forming material. This coating layer forming material can be added in various ways such as curing agents, colorants, light stabilizers, heat stabilizers, antioxidants, antifungal agents, flame retardants, etc. An agent may be contained. In addition, when a foaming agent is included in the coating layer forming material, it is preferable that the foaming agent is not included in the coating layer forming material because a through-hole may be generated in the coating layer due to foaming.

  Although the thickness of the said coating layer is not specifically limited, As a minimum of the average thickness of this coating layer, 10 micrometers is preferable and 20 micrometers is more preferable. Moreover, as an upper limit of the average thickness of a coating layer, 80 micrometers is preferable and 40 micrometers is more preferable. If the average thickness of the coating layer is less than the lower limit, the effect of preventing impregnation of the vibrating body forming material into the knit material as described above by the coating layer may be insufficient. On the other hand, when the average thickness of the coating layer exceeds the above upper limit, the protective layer becomes too thick, the stretchability of the protective layer becomes insufficient, and the hit feeling may be impaired.

  Moreover, as a minimum of ratio of the average thickness of the said coating layer with respect to the average thickness of the said knit material, 0.05 time is preferable and 0.08 time is more preferable. The upper limit of the average thickness ratio is preferably 0.2 times and more preferably 0.15 times. If the ratio of the average thickness is less than the lower limit, the knit material may be too thick or the coating layer may be too thin. On the contrary, when the ratio of the average thickness exceeds the upper limit, the knit material may be too thin or the coating layer may be too thick. For this reason, when the ratio of the average thickness is within the above range, each layer has sufficient strength and the stretchability of the protective layer is ensured.

  The coating layer may be composed of a single layer made of resin or rubber laminated on the back surface of the knit material, or may be composed of a composite layer in which the resin or rubber that is the coating material and the fibers of the knit material are present. It is also possible to form a two-layer structure of the single layer made of resin or rubber and the composite layer disposed on the back surface of the single layer.

<Sensor>
The four sensors 4 are bonded to the peripheral surface of the vibrating body 3 using an adhesive so that the surface thereof is substantially perpendicular to the striking surface of the vibrating body 3, that is, substantially parallel to the striking force direction F. . Thereby, the sensor 4 detects vibration in a direction perpendicular to the striking force direction F of the vibrating body 3, that is, a longitudinal wave. The adhesive is not particularly limited as long as it can adhere the sensor 4, and for example, a reactive adhesive can be used.

  These sensors 4 output a hit detection signal to a signal processing device (not shown) or an electronic sound source via a signal output line (not shown). The sensor 4 is not particularly limited as long as it can detect a longitudinal wave in a direction perpendicular to the surface as described above. For example, a capacitive pressure sensor, a pressure sensitive resistor, a piezoelectric body, An acceleration sensor or the like is used.

  As the capacitance type pressure sensor, for example, as described in JP-A-61-148044, one formed by alternately laminating dielectrics and electrodes can be used. In such a capacitive pressure sensor, the dielectric is compressed by receiving pressure in the stacking direction, and the capacitance between the electrodes changes. Therefore, by measuring the capacitance between the electrodes, Detect pressure.

[Method for producing pad for electronic drum]
Next, a method for manufacturing the electronic drum pad 1 will be described.

The manufacturing method of the electronic drum pad 1 for an electronic percussion instrument includes the following steps.
(1) A step of forming a protective layer by laminating a coating layer on the back side of the knit material (2) A step of forming the vibrating body 3 between the protective layer and the support 2, and (3) the support Attaching the sensor 4 to the peripheral surface of the body 2

(Protective layer forming step)
In the protective layer forming step, for example, the protective layer is formed by heat-sealing a stretchable film that can be heat-sealed to the back surface of the knit material. In addition, it is also possible to employ | adopt the method of applying a coating layer forming material to the surface of a knit material, and drying as this protective layer formation process.

(Vibration body forming process)
In the vibrating body forming step, a liquid vibrating body forming material is supplied between the protective layer and the support body 2 disposed in the mold, and the vibrating body forming material is cured, whereby the supporting body 2 and the protection body are protected. The vibrating body 3 bonded to the layer is formed. In this vibrating body forming step, a peripheral surface to which the sensor 4 is bonded is formed by the mold.

  Further, in the vibrating body forming step, as described above, the vibrating body forming material including the foaming agent is cured while being foamed. For this reason, the vibrating body 3 is molded and bonded to the protective layer and the support 2 by the foaming pressure as described above. Specifically, the vibrating body forming material is foamed, for example, by heating or the like, and is cured by polymerization of polyol and isocyanate, so that the vibrating body 3 is molded and bonded to the support 2 and the protective layer.

The foaming pressure (pressure in the mold during foaming of the vibrating body forming material) is preferably 1.2 kgf / cm ² or more and 5.5 kgf / cm ² or less. There exists a possibility that sufficient joining with the support body 2 or a protective layer may not be obtained as the said foaming pressure is less than the said minimum. On the other hand, if the foaming pressure exceeds the upper limit, a cost is required to form a mold that can withstand this pressure, which may increase the manufacturing cost.

(Sensor installation process)
In the sensor attaching step, the sensor 4 is bonded to the peripheral surface of the vibrating body 3 with an adhesive. In addition, you may perform this sensor attachment process in the said vibration body formation process by arrange | positioning the sensor 4 in the said shaping | molding die. In the case where the sensor 4 is bonded to the vibrating body 3 in this way in the vibrating body forming step, the adhesive can be omitted.

<Advantages>
In the electronic drum pad 1, longitudinal waves as radial dense waves propagate around the hitting position by hitting. This longitudinal wave also propagates in a direction substantially perpendicular to the striking force direction F and is detected by the sensor 4. That is, the sensor 4 does not directly detect the striking force received by the vibrating body 3, but detects a longitudinal wave of the vibrating body 3 caused by the striking force (extension and contraction in the surface direction of the vibrating body 3 centering on the striking position). . For this reason, even if the place where the impact force is received is close to the sensor 4, the detection value of the sensor 4 does not become excessively large. Further, since the sensor 4 is disposed on the peripheral surface of the vibrating body at a substantially equal angle, the magnitude of the striking force can be more accurately determined from the average value of the detected values of the four sensors 4. As described above, the electronic drum pad 1 has a relatively small difference in detection sensitivity depending on the hitting position.

  Further, since the longitudinal wave has a higher propagation speed than the transverse wave (vibration in which the support body 2 and the vibration body 3 bend in the striking force direction F), the electronic drum pad 1 can detect vibration due to striking relatively quickly. . Further, since the longitudinal wave has a larger attenuation rate than the transverse wave, the detected value of the sensor 4 has a large vibration component directly propagated from the hitting point, and is reflected by the periphery of the vibrating body 3 and then propagated to the sensor 4. The vibration component to be reduced becomes smaller. Thereby, since the said electronic drum pad 1 does not require the calculation which filters a reflected wave, or the calculation load is comparatively small, it can detect a striking force more rapidly. In particular, since the vibrating body 3 is made of a foam material and includes a large number of bubbles, the electronic drum pad 1 can quickly attenuate the longitudinal wave and reduce the influence of the reflected wave.

  Further, the electronic drum pad 1 can specify the striking position based on the ratio of the detection values of the four sensors 4. Therefore, for example, an electronic percussion instrument such as a steel pan whose sound waveform and scale change according to the hitting position can be configured.

[Second Embodiment]
The pad 1a for electronic drums of FIG.3 and FIG.4 is another embodiment of the electronic drum percussion detection device according to the present invention. The electronic drum pad 1a is used for an electronic drum and is hit with a drum stick or the like to detect this hit. It is.

  The electronic drum pad 1 a includes a circular plate-like support 2, an elastomeric disc-shaped vibrating body 3 bonded to the surface of the supporting body 2, and substantially the same along the outer peripheral surface of the vibrating body 3. Four plate-like sensors 4 arranged at angular intervals and the back surface (surface opposite to the vibrating body 3) of the sensor 4 are bonded, and an annular fixed body 5a fixed to the support body 2. And have. In the electronic drum pad 1a of FIGS. 3 and 4, the support body 2, the vibration body 3, and the individual sensors 4 are the same as the support body 2, the vibration body 3 and the sensor 4 in the electronic drum pad 1 of FIGS. Since they are the same as those described above, the same reference numerals are assigned and duplicate descriptions are omitted.

<Fixed body>
The fixed body 5a is made of a material having rigidity such as metal or resin, and may be formed integrally with the support body 2 or may be fixedly attached to the support body 2. The fixed body 5a may be composed of a plurality of members to which one sensor 4 is bonded.

  Moreover, the fixed body 5a may be arrange | positioned so that a compressive force or a tensile force may act on the sensor 4 previously.

<Advantages>
In the electronic drum pad 1a, the detection sensitivity of the sensor 4 can be increased by holding the back surface of the sensor 4 (the surface opposite to the surface to which the vibration of the vibrating body 3 is transmitted) by the fixed body 5a. .

  Moreover, in the electronic drum pad 1a, if a compressive force or a tensile force is applied to the sensor 4 in advance, the dead zone can be removed to improve the detection sensitivity.

[Third embodiment]
The electronic drum pad 1b of FIGS. 5 and 6 is still another embodiment of the electronic drum percussion detection device according to the present invention. The electronic drum pad 1b is used in an electronic drum and is hit with a drum stick or the like to detect this hit. Is.

  The electronic drum pad 1b includes a circular plate-like support body 2, an elastomer-made substantially disk-shaped vibration body 3b bonded to the surface of the support body 2, and substantially along the outer peripheral surface of the vibration body 3b. It has four plate-like sensors 4 arranged at equiangular intervals, and an annular fixed body 5a fixed to the support 2 while the back surface of the sensor 4 is bonded. In the electronic drum pad 1b shown in FIGS. 5 and 6, the support 2 and the sensor 4 are the same as the support 2 and sensor 4 in the electronic drum pad 1 shown in FIGS. 3 and 4 are the same as the fixed body 5a in the electronic drum pad 1a shown in FIG.

<Vibrating body>
In the electronic drum pad 1b, the vibrating body 3b is formed with four convex portions 6b projecting toward the sensors 4 on the peripheral surface thereof as shown in the figure. And the vibrating body 3b is contacting the surface of each sensor 4 by these four convex parts 6b.

<Advantages>
In the electronic drum pad 1b, since the vibration propagating through the vibrating body 3b is concentrated on the tip of the convex portion 6b, the amplitude applied to the sensor 4 is increased. Thereby, the electronic drum pad 1b can improve the detection sensitivity of the hit.

[Fourth embodiment]
The electronic drum pad 1c of FIG. 7 is still another embodiment of the electronic percussion instrument hit detection device according to the present invention. The electronic drum pad 1c is used for an electronic drum and hits with a drum stick or the like to detect this hit. .

  The electronic drum pad 1c includes a circular plate-like support body 2, an elastomer-made substantially disc-shaped vibration body 3 bonded to the surface of the support body 2, and a substantially along the outer peripheral surface of the vibration body 3. A plurality of plate-like sensors 4 arranged at equiangular intervals, the back surface of the sensor 4 are bonded, an annular fixed body 5a fixed to the support 2, the vibrating body 3, and each sensor 4 And four connection members 7c respectively disposed between them. In the electronic drum pad 1c shown in FIG. 7, the support 2, the vibrating body 3 and the sensor 4 are the same as the support 2, the vibrating body 3 and the sensor 4 in the electronic drum pad 1 shown in FIGS. Since the body 5a is the same as the fixed body 5a in the electronic drum pad 1a of FIGS. 3 and 4, the same reference numerals are assigned to each other, and redundant description is omitted.

<Connected body>
The connection body 7c is made of a material having rigidity such as metal or resin, and is bonded to the vibrating body 3 and the sensor 4, respectively.

<Advantages>
In the electronic drum pad 1c, since the connection body 7c has rigidity, the longitudinal wave propagated in the radial direction in the vibration body 3 is efficiently concentrated and transmitted to the sensor 4. Thereby, the said electronic drum pad 1c can improve the detection sensitivity of an impact.

[Fifth embodiment]
The electronic drum pad 1d of FIG. 8 is still another embodiment of the electronic percussion instrument hit detection device according to the present invention. The electronic drum pad 1d is used in an electronic drum and hits with a drum stick or the like to detect this hit. .

  The electronic drum pad 1d includes a circular plate-like support body 2, an elastomer-made substantially disc-shaped vibration body 3 bonded to the surface of the support body 2, and a substantially along the outer peripheral surface of the vibration body 3. A plurality of plate-like sensors 4 disposed at equal angular intervals, an annular fixed body 5a disposed on the back side of the sensor 4 and fixed to the support 2, and each sensor 4 and fixed body 5a And four buffer bodies 8d respectively disposed between them. In the electronic drum pad 1d shown in FIG. 8, the support 2, the vibrating body 3, and the sensor 4 are the same as the support 2, the vibrating body 3, and the sensor 4 in the electronic drum pad 1 shown in FIGS. Since the body 5a is the same as the fixed body 5a in the electronic drum pad 1a of FIGS. 3 and 4, the same reference numerals are assigned to each other, and redundant description is omitted.

<Buffer body>
The buffer 8d is made of an elastic material such as foamed elastomer, and is bonded to the sensor 4 and the fixed body 5a.

<Advantages>
In the electronic drum pad 1d, the buffer 8d prevents such noise from being transmitted to the sensor 4 when an external force is applied to the support 2 or the fixed body 5a. For this reason, the electronic drum pad 1d can accurately detect the impact on the vibrating body 3.

[Sixth embodiment]
The electronic drum pad 1e in FIG. 9 is still another embodiment of the electronic percussion instrument hit detection device according to the present invention. The electronic drum pad 1e is used in an electronic drum, hit with a drum stick or the like, and detects this hit. .

  The electronic drum pad 1e includes a circular plate-like support body 2, an elastomer-made substantially disk-shaped vibration body 3b bonded to the surface of the support body 2, and a substantially along the outer peripheral surface of the vibration body 3b. There are four plate-like sensors 4e arranged at equal angular intervals, and a part of the back surface of the sensor 4e is bonded, and an annular fixed body 5e fixed to the support 2 is provided. In the electronic drum pad 1e of FIG. 9, the support 2 is the same as the support 2 in the electronic drum pad 1 of FIGS. 1 and 2, and the vibrating body 3b is the electronic drum pad 1b of FIGS. Are the same as the vibrating body 3b in FIG.

<Sensor>
The sensor 4e is a sensor that detects a bending stress, and may have a known configuration including, for example, a strain gauge. The tip of the convex portion 6b of the vibrating body 3b abuts on the sensor 4e at the center in the vertical direction on the surface (surface on the vibrating body 3 side), and the vertical direction on the back surface (surface on the opposite side to the vibrating body 3). The fixed body 5e is in contact with both ends.

<Fixed body 5e>
The fixed body 5e has upper and lower ends projecting inward, and holds both ends in the vertical direction on the back surface of the sensor 4e. As a result, the sensor 4e bends and deforms so that the center portion with which the tip of the convex portion 6b abuts is displaced in a direction perpendicular to the striking force direction F with the vertical ends held by the fixed body 5e as fulcrums.

<Advantages>
Since the electronic drum pad 1e detects the displacement in the radial direction due to the longitudinal wave propagating through the vibrating body 3b by converting it into the bending stress of the sensor 4e, the deformation amount of the sensor 4e is increased, and the detection sensitivity of the impact is increased. Can be improved.

[Seventh embodiment]
The mallet 11 in FIG. 10 is still another embodiment of the percussion detection device for electronic percussion instruments according to the present invention, and is used as a stick-shaped electronic percussion instrument. This mallet 11 is hit against another object, and detects the striking force as the reaction force.

  The mallet 11 is bonded to a rod-like support 12, a substantially spherical vibrator 13 through which the tip of the support 12 passes, and an end face of the vibrator 13 on the tip side of the support 12. A plate-like sensor 14 and a plate-like fixed body 15 that is bonded to the surface of the sensor 14 opposite to the vibrating body 13 and fixed to the distal end portion of the support 12 that penetrates the vibrating body 13 and the sensor 14. And a locking body 16 fixed to the support body 12 on the side opposite to the sensor 14 of the vibrating body 13.

<Support>
The support 12 is made of a material having rigidity such as metal, resin, and wood. A grip or the like that is easy for the user to grip may be provided on the side opposite to the vibrating body 13.

<Vibrating body>
The vibrating body 13 has an outer periphery in the radial direction centered on the support 12 as a striking surface against which another object is hit, and the striking force direction F is an arbitrary radial direction perpendicular to the support 12.

  The diameter of the vibrating body 13 is not particularly limited as long as it is larger than the diameter of the sensor 14. For example, the diameter is 10 mm or more and 50 mm or less. In addition, the vibrating body 13 is not limited to the spherical shape as described above, and may have another shape such as a cylindrical shape as long as it is hit in a direction perpendicular to the support 12.

  As the material of the vibrating body 13, the same material as the vibrating body 3 in the electronic drum pad 1 of FIGS. 1 and 2 can be used.

<Sensor>
The sensor 14 is bonded to the end face of the vibrating body 13 whose surface is chamfered substantially parallel to the striking force direction F. That is, the surface of the sensor 14 is substantially parallel to the striking force direction F. As the sensor 14, a disk-shaped sensor having a hole in the center may be used alone, or a plurality of plate-shaped sensors arranged so as to surround the support 12 may be used. As such a sensor 14, the same sensor as the sensor 4 in the electronic drum pad 1 of FIGS. 1 and 2 can be used.

<Fixed body>
The fixed body 15 is made of, for example, a material having rigidity such as metal or resin, and may be formed integrally with the support body 12 or may be fixedly attached to the tip of the support body 12.

<Locking body>
The locking body 16 is attached to the support body 12 or formed integrally with the support body 12. The locking body 16 is locked so that the vibrating body 13 does not move along the support body 12 by sandwiching the vibrating body 13 between the locking body 16 and the fixed body 15 via the sensor 14.

<Advantages>
Also in the mallet 11, since the longitudinal wave generated by the striking force applied to the vibrating body 13 can be mainly detected by the sensor 14, the striking force can be detected accurately and quickly.

[Other Embodiments]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is not limited to the configuration of the embodiment described above, but is shown by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims. The

  The hit detection device in the form of an electronic drum pad may further include a sensor for detecting the hit force on the back side of the vibrating body as in the conventional case.

  Further, in the hit detection device in the form of an electronic drum pad, there may be no support.

  Furthermore, in the hit detection device in the form of a pad for an electronic drum, the shape of the vibrating body is not limited to a disk shape, and may be an arbitrary shape such as a polygon in a plan view and an ellipse.

  In the hit detection device in the form of an electronic drum pad, the vibrating body and the support may be bonded using an adhesive. Moreover, when it has a fixed body, a vibrating body is made into non-contact with respect to a support body, you may support with a fixed body via a sensor, and you may support directly with a fixed body.

  The hit detection device in the form of an electronic drum pad may have one sensor or a plurality of sensors other than four. The number of sensors in the percussion detection device for electronic percussion instruments in the form of mallet is also arbitrary. If the number of sensors is 3 or more, it is possible to calculate the striking position on the striking surface of the vibrating body based on the detection value of each sensor.

  In the hit detection device, the vibrating body may be formed of an unfoamed elastomer.

  The hit detection device of the present invention can be used as a component for various electronic percussion instruments.

1, 1a, 1b, 1c, 1d, 1e Drum pad (a percussion detection device for electronic percussion instruments)
2 Support bodies 3 and 3b Vibrating bodies 4 and 4e Sensors 5a and 5e Fixed body 6b Convex part 7c Connection body 8d Buffer body 11 Mallet (Percussion detection device for electronic percussion instrument)
12 Support body 13 Vibrating body 14 Sensor 15 Fixed body 16 Locking body

Claims (5)

An impact detection device for an electronic percussion instrument comprising an elastomeric vibration body that vibrates in response to a striking force, and a plate-shaped sensor that contacts the vibration body and detects vibration of the vibration body,
A hit detection device for an electronic percussion instrument, wherein a direction of a hitting force received by the vibrating body and a surface of the sensor are substantially parallel.   The hit detection device for an electronic percussion instrument according to claim 1, wherein the vibrating body is made of a foam material.   The electronic percussion instrument percussion instrument according to claim 1, wherein the vibration body has a disk shape having a striking surface on an upper surface, and the sensor is disposed along a peripheral surface of the vibration body and is a pad for an electronic drum. Detection device.   The percussion detection device for an electronic percussion instrument according to claim 3, wherein a peripheral surface of the vibrating body on which the sensor is disposed has one or a plurality of convex portions, and the convex portions are in contact with the surface of the sensor.   The hit detection device for an electronic percussion instrument according to claim 3 or 4, wherein the three or more sensors are arranged on the peripheral surface of the vibrating body at substantially equal angular intervals.

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