JP2014130373A - Electronic drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic drum capable of suppressing the material cost and reducing the weight by reducing the rigidity required for a cylindrical member.SOLUTION: A percussion surface head 3 is extended on an open surface of one end side (upside in Fig. 3) of a cylindrical member 2, a metallic percussion surface hoop 4 for pressing a head frame 31 of the percussion surface head 3 is fixed to a rear surface hoop 5 via a connection section 6, and a rim sensor 72 is attached on a rim sensor support member 71 connected to the rear surface hoop 5. A percussion surface sensor 74 is connected to the rear surface hoop 5 via the rim sensor support member 71 and a percussion surface sensor support member 73 to be tightly fixed to it. Therefore, the material of the cylindrical member 2 can be selected freely, the material cost can be suppressed, and the weight of the whole toms 100 can be reduced.

Description

  The present invention relates to an electronic drum, and more particularly, to an electronic drum that can reduce the rigidity required for a cylindrical member, thereby reducing the material cost and reducing the weight.

  Conventionally, various electronic drums 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 vibration due to impact, and is configured to control a sound source based on a detection signal of the sensor to generate a musical sound corresponding to the impact.

  An electronic percussion instrument (electronic drum) disclosed in Japanese Patent Application Laid-Open No. 2008-186036 has a head as a striking surface at an opening portion on the back side (surface facing the player) of a shell (cylindrical member) as a cylindrical body. A striking sensor (striking surface sensor) that is attached with a striking surface head and detects vibration when the head is struck is attached to a frame fixed inside the shell.

JP2008-186036 (paragraph [0015] etc.)

  However, in the electronic percussion instrument described above, it is necessary to firmly fix the impact sensor and keep the contact state between the impact sensor and the head constant in order to cause the impact sensor to detect vibration when the head is impacted. There is. Therefore, since the shell to which the frame is attached is required to have high rigidity, selection of a material to be used for the shell is limited, and there is a problem that the material cost increases and the weight of the entire electronic drum increases.

  The present invention has been made in order to solve the above-described problems, and provides an electronic drum capable of reducing the rigidity required for a cylindrical member to reduce the material cost and reduce the weight. It is an object.

  In order to achieve this object, an electronic drum according to a first aspect of the present invention includes a cylindrical tubular member whose both surfaces are open, a striking surface head stretched at one end of the tubular member, and the striking surface head. A striking surface hoop for pressing the outer peripheral edge, a back surface hoop disposed on the other end side of the tubular member, and a connecting portion for tightening the striking surface head by connecting and tightening the back surface hoop to the striking surface hoop. And a striking surface sensor that is disposed between the back surface hoop and the striking surface hoop and detects the vibration of the striking surface head in contact with the striking surface head, Attached to the back hoop.

  According to a second aspect of the present invention, in the electronic drum of the first aspect, the connecting portion has a pipe-like member having a screw portion formed therein and an end portion screwed into the screw portion of the pipe-like member. The hitting surface hoop includes a striking surface projecting portion that is formed to project from an outer peripheral portion and has a hole through which an end of the screw rod can be inserted, and the back surface hoop projects from the outer peripheral portion. The back surface overhang | projection part to which the said pipe-shaped member is formed is provided, and the said screw rod is screwed together by the said pipe-shaped member, while the edge part is penetrated by the said hole.

  According to a third aspect of the present invention, there is provided the electronic drum according to the second aspect, further comprising a rim sensor that detects vibration of the hitting surface hoop, and the back hoop is made of a metal that holds the rim sensor and the hitting surface sensor. The sensor support member is connected, and the hitting surface hoop, the connecting portion, and the back surface hoop are made of metal.

  According to a fourth aspect of the present invention, there is provided the electronic drum according to the first or second aspect, further comprising a bar-like or plate-like support leg member connected to the back hoop.

  An electronic drum according to a fifth aspect of the invention is the electronic drum according to any one of the first to third aspects, further comprising a plate-shaped mounting bracket fixing member connected to the back hoop.

  According to the electronic drum of the first aspect, since the hitting surface sensor is attached to the back surface hoop, the hitting surface sensor is firmly fixed even when the cylindrical member is made of a material having low rigidity. be able to. Therefore, since the material of the cylindrical member can be freely selected, there is an effect that the material cost can be suppressed and the entire electronic drum can be reduced in weight.

  According to the electronic drum of the second aspect, in addition to the effect produced by the electronic drum of the first aspect, the pipe-shaped member includes a back surface overhang portion formed in the back surface hoop and a striking surface tension formed in the striking surface hoop. Since it connects with a protrusion part, the outer peripheral surface of a cylindrical member can be made flat. Therefore, when replacing the sheet-like outer peripheral surface cover member that is provided on the outer peripheral surface of the cylindrical member and has various colors and patterns, the outer peripheral surface cover member is simply removed by removing only the striking surface head and the striking surface hoop. Since it can be exchanged, there is an effect that the man-hours for exchanging the outer peripheral surface cover member can be reduced as compared with the conventional product connecting the hitting surface hoop and the cylindrical member.

  According to the electronic drum of claim 3, in addition to the effect achieved by the electronic drum of claim 2, the metal sensor frame to which the rim sensor is attached is connected to the back surface hoop, and the striking surface hoop, the connecting portion, and the back surface Since the hoop is made of metal, the transmission path from the hitting surface hoop to the rim sensor can be made of only metal. Therefore, the vibration at the time of hitting the hitting surface hoop (rim) can be suppressed from being absorbed by other members, and the vibration can be efficiently transmitted to the rim sensor.

  In addition, when the rim sensor is attached to the shell, the output waveform of the rim sensor tends to change due to the shape, material, or elasticity of the shell, whereas in the present invention, the back hoop to which the rim sensor is attached is hit by the connecting portion. Since it is fastened to the surface hoop, there is an effect that the rounding of the output waveform of the rim sensor can be suppressed.

  According to the electronic drum of the fourth aspect, in addition to the effect achieved by the electronic drum of the first or second aspect, the supporting leg member that supports the electronic drum in a state where the electronic drum is erected vertically from the floor surface is connected to the back surface hoop. Therefore, even when the cylindrical member is made of a material having low rigidity, the support leg member can be firmly held. Therefore, even in an electronic drum having a support leg member such as an electronic bass drum, the material of the cylindrical member can be freely selected, and the material cost can be suppressed and the electronic drum can be reduced in weight. effective.

  According to the electronic drum of claim 5, in addition to the effect of the electronic drum according to any one of claims 1 to 3, the mounting bracket for attaching the electronic drum to a support rod of a drum stand (not shown) not shown. Since the plate-shaped mounting bracket fixing member for fixing the mounting member is connected to the back hoop, the mounting bracket fixing member is firmly held even when the cylindrical member is made of a material having low rigidity. The electronic drum can be securely fixed to the drum stand. Therefore, even in an electronic drum having a mounting bracket fixing member such as a tom, the material of the cylindrical member can be freely selected, and the material cost can be suppressed and the electronic drum can be reduced in weight. There is.

It is a perspective view of the tom in 1st Embodiment of this invention. It is a perspective view which shows the internal structure of a tom. FIG. 3 is a side cross-sectional view of the tom taken along line III-III in FIG. 1. It is an enlarged view of the connection part in IV part of FIG. It is a perspective view of the bass drum in 2nd Embodiment. It is a rear view which shows the internal structure of a bass drum. It is a disassembled perspective view of the bass drum in 3rd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the external configuration of the tom 100 will be described with reference to FIG. FIG. 1 is a perspective view of a tom 100 according to the first embodiment of the present invention.

  The tom 100 is an electronic percussion instrument that is played using a hitting stick or the like, and includes a hitting surface sensor 74 and a rim sensor 72 (see FIG. 2), which will be described later, that detect vibration caused by hitting. A musical sound device (not shown) is configured to control a sound source based on detection signals of the striking surface sensor 74 and the rim sensor 72 and generate a musical sound in response to the striking. Through the speaker device.

  As shown in FIG. 1, the tom 100 includes a cylindrical tubular member 2 whose both ends are open, a striking surface head 3 which is stretched at one end of the tubular member 2 and serves as a striking surface, and its striking head. An annular striking surface hoop 4 that presses the outer peripheral edge of 3, a back surface hoop 5 disposed on the other end side of the tubular member 2, and the back surface hoop 5 and the striking surface hoop 4 are connected and tightened. Thus, the connecting portion 6 for tensioning the striking surface head 3 and a mounting bracket 8 attached to a support rod of a drum stand (not shown) are mainly provided.

  Next, the internal configuration of the tom 100 will be described with reference to FIG. FIG. 2 is a perspective view showing the internal structure of the tom 100, in which the tubular member 2, the hitting head 3 and the hitting hoop 4 are removed from the tom 100 (see FIG. 1).

  As shown in FIG. 2, a metal rim sensor support member 71 is fixed to the inner peripheral portion of the back surface hoop 5 with a bolt, and the hitting surface hoop 4 (see FIG. 1) is located at the upper surface side central portion of the rim sensor support member 71. 2) is attached. A striking surface sensor support member 73 having a U-shaped cross section is fixed across the rim sensor 72 at the center of the rim sensor support member 71, and the striking surface head 3 is disposed on the top surface of the striking surface sensor support member 73. A hitting surface sensor 74 having a truncated cone shape for detecting the vibration (see FIG. 1) is attached.

  The mounting bracket 8 is fixed to one surface side of the mounting bracket fixing member 81 having an L-shaped cross section, and the other surface side of the mounting bracket fixing member 81 is fixed to the inner peripheral portion of the back surface hoop 5. . Therefore, even when the cylindrical member 2 has low rigidity, the tom 100 can be reliably fixed to the drum stand.

  Next, the detailed configuration of the tom 100 will be described with reference to FIGS. 3 and 4. 3 is a side sectional view of the tom 100 taken along the line III-III in FIG. 1, and FIG. 4 is an enlarged view of the connecting portion 6 in the IV portion of FIG.

  As shown in FIG. 3, the striking surface head 3 is held by a head frame 31 having an outer peripheral edge having an annular shape, and the head frame 31 is fitted on the outer periphery of the tubular member 2. The striking surface hoop 4 is a metal member having an annular shape, and includes six striking surface projecting portions 41 formed by projecting from the outer peripheral portion at equal intervals in the circumferential direction. As shown in FIG. 4, the striking surface overhanging portion 41 has a first hole portion that is larger than the outer diameter of the first engaging portion 62a of the first screw rod 62 and smaller than the outer diameter of the first locking portion 62b. 41a is perforated.

  The back surface hoop 5 is a metal member having an annular shape, and includes a back surface projecting portion 51 that is formed by projecting from the outer peripheral portion. Moreover, the back surface overhang | projection part 51 is formed in the outer peripheral part of the back surface hoop 5 at six places at equal intervals in the circumferential direction (refer FIG. 1).

  As shown in FIG. 3, the open surface on one end side (upper side in FIG. 3) of the cylindrical member 2 is stretched with the striking surface head 3, and the open surface on the other end side (lower side in FIG. 3). Is closed by a disc-shaped back cover 9 fixed to the inner peripheral portion of the back hoop 5. The metal hitting surface hoop 4 that holds the head frame 31 of the hitting head 3 is fixed to the back hoop 5 by the connecting portion 6, and the rim sensor 72 is attached to the rim sensor support member 71 connected to the back hoop 5. ing.

  Here, the hitting surface hoop 4, the connecting portion 6, the back surface hoop 5, and the rim sensor support member 71 are all made of metal. Therefore, it is possible to efficiently transmit to the rim sensor 72 while suppressing the absorption of the vibration when the hitting hoop 3 is hit. Further, since the connecting portions 6 that serve as a transmission path until the vibration of the hitting surface hoop 4 is transmitted to the rim sensor 72 are arranged at equal intervals in the circumferential direction, regardless of where the hitting surface hoop 4 is hit, The vibration of the hitting surface hoop 4 can be transmitted to the rim sensor 72 evenly. Further, as compared with the case where the rim sensor 72 is attached to the tubular member 2, the rounding of the output waveform of the rim sensor 72 can be suppressed.

  Further, the hitting surface sensor 74 is positioned so that the upper end portion contacts the hitting surface head 3. The striking surface sensor 74 is firmly fixed by being connected to the back surface hoop 5 via the rim sensor support member 71 and the striking surface sensor support member 73, so that the striking surface head 3 can be connected regardless of the rigidity of the tubular member 2. The vibration at the time of hitting is reliably detected by the hitting surface sensor 74. Therefore, the material of the cylindrical member 2 can be freely selected, and the material cost can be suppressed and the tom 100 as a whole can be reduced in weight. Further, since the hitting surface sensor 74 is fixed to the back surface hoop 5, the positional accuracy between the hitting surface sensor 74 and the hitting surface head 3 is ensured as compared with the case where the hitting surface sensor 74 is attached to the tubular member 2. At the same time, the hitting surface sensor 74 can stably detect vibration when the hitting head 3 is hit.

  As shown in FIG. 3 or FIG. 4, the cylindrical member 2 is sandwiched and fixed by a striking surface hoop 4 and a back surface hoop 5, and a sheet-like outer peripheral surface cover member 21 is provided on the outer peripheral surface of the cylindrical member 2. It is laid. By covering the outer peripheral surface of the cylindrical member 2 with a decorative outer peripheral surface cover member 21 with various colors and patterns, it becomes possible to attach a favorite color and pattern of the performer to the cylindrical member 2. .

  Here, one side edge of the outer peripheral surface cover member 21 is inserted between the rear surface hoop 5 and the outer peripheral surface of the cylindrical member 2. Thereby, the outer peripheral surface cover member 21 can be fixed without sticking to the outer surface of the cylindrical member 2. Further, if the striking surface hoop 4 and the striking surface head 3 are removed by removing the first screw rod 62 from the pipe-shaped member 61, there is no member that blocks the outer peripheral surface of the tubular member 2. The outer peripheral surface cover member 21 can be removed from the cylindrical member 2 by pulling out one side edge from between the back surface hoop 5 and the outer peripheral surface of the cylindrical member 2. Thereby, the outer peripheral surface cover member 21 can be easily attached to the outer peripheral surface of the cylindrical member 2, and the outer peripheral surface of the cylindrical member 2 can be decorated according to liking. Furthermore, since processing for simplifying the mounting of the outer peripheral surface cover member 21 is not required, an increase in manufacturing cost can be suppressed.

  Moreover, since the outer peripheral surface cover member 21 should just be a sheet-like thing which can be mounted | worn on the outer peripheral surface of the cylindrical member 2, it can be manufactured easily and cheaply. When the performer likes the color and texture of the cylindrical member 2 itself, it is not necessary to cover the outer peripheral surface of the cylindrical member 2 with the outer peripheral surface cover member 21.

  The connecting portion 6 includes a pipe-shaped member 61, a first screw rod 62 that is screwed to the screw portion at one end of the pipe-shaped member 61, and a second screw rod that is screwed to the screw portion at the other end of the pipe-shaped member 61. 63. The pipe-shaped member 61 has a first nut-shaped member 61a formed with a threaded portion to which the first screw rod 62 can be screwed at one end on the inner peripheral surface side, and a second screw rod at the other end. The 2nd nut member 61b in which the screw part which 63 can screw together was formed is adhering.

  The first screw rod 62 includes a first engagement portion 62a that is screwed into a screw portion of the first nut member 61a, and a first locking portion 62b having an outer diameter larger than that of the first engagement portion 62a. . The second screw rod 63 includes a second engagement portion 63a that is screwed into a screw portion of the second nut member 61b, and a second locking portion 63b having an outer diameter larger than that of the second engagement portion 63a. .

  A recessed portion 51a into which the pipe-like member 61 can be fitted is recessed on the upper surface side (upper side in FIG. 4) of the rear surface overhanging portion 51, and the second screw rod 63 is formed at a substantially central portion of the recessed portion 51a. A second hole 51b that is larger than the outer diameter of the second engaging portion 63a and smaller in outer diameter than the second locking portion 63b is formed.

  The other end of the pipe-shaped member 61 is fitted in the recessed portion 51a, and the second screw rod 63 is inserted into the second nut member 61b while the second engaging portion 63a is inserted through the second hole portion 51b. The second locking portion 63 b is engaged with the back surface protruding portion 51 by being screwed. Accordingly, the second screw rod 63 is screwed to the other end of the pipe-shaped member 61, and the pipe-shaped member 61 is fixed to the back surface hoop 5.

  The second nut member 61b is fixed to the polygonal outer shape of the second nut member 61b, and the second nut member 61b is fixed so that the end of the second nut member 61b protrudes from the other end side of the pipe-shaped member 61. The end of the second nut member 61b fitted into the recessed portion 51a is formed as a recessed portion by forming the recessed portion 51a in a shape that allows the other end of the second nut member 61 and the end of the second nut member 61b to be fitted. The second screw rod 63 can be reliably fixed by the second nut member 61b by preventing the rotation within the 51a.

  Further, the first screw rod 62 is engaged with the first nut member 61a while the first engaging portion 62a is inserted through the first hole portion 41a, and the first locking portion 62b is engaged with the striking surface projecting portion 41. Are combined. By tightening the first screw rod 62 to the first nut member 61a, the striking surface hoop 4 is attracted to the striking surface overhanging portion 41 side, and the striking surface head 3 can be tensioned.

  Next, an external configuration of the bass drum 200 in the second embodiment will be described with reference to FIGS. 5 and 6. In the first embodiment, the tom 100 is fixed by being attached to a support rod of a drum stand (not shown) by the mounting bracket 8, whereas in the second embodiment, the rod-like or plate-like support leg member 210 is provided. The bass drum 200 is supported vertically from the floor surface. In addition, the same code | symbol is attached | subjected to the part same as above-described 1st Embodiment, and the description is abbreviate | omitted.

  FIG. 5 is a perspective view of the bass drum 200 according to the second embodiment, and FIG. 6 is a rear view showing the internal configuration of the bass drum 200. 6 shows the bass drum 200 with the tubular member 2, the hitting head 3 and the hitting hoop 4 removed (see FIG. 1). The bass drum 200 is one of electronic drums that are played by hitting a hitting head 3 (not shown) with a foot pedal (not shown).

  As shown in FIG. 5, a plurality of small protrusions are formed on the surface of the back cover 209, and the back cover 209 is slightly curved to the front side. As a result, when the back cover 209 is illuminated by the lighting during the performance of the bass drum, the illumination light is scattered without being reflected in one direction, so that the audience watching the performance of the bass drum facing the back cover 209 is illuminated. It is possible to prevent the reflected light from being concentrated. Further, a slight gap is formed between the back surface cover 209 and the back surface hoop 205, and the air in the tubular member 2 that vibrates due to the striking of the striking surface head 3 is released from the clearance, whereby the striking surface head 3. It is possible to reduce the volume of the hitting sound generated in the above.

  As shown in FIG. 6, the striking surface sensor support member 273 is connected to the back surface hoop 205, and the top surface of the striking surface sensor support member 273 is composed of an elastic member such as polyurethane sponge together with the striking surface sensor 74. A buffer member 275 is attached. The buffer member 275 suppresses excessive vibration of the hitting head 3 by absorbing vibration when the hitting head 3 is hit.

  As shown in FIG. 5, the support leg member 210 includes two legs 211 having a bar shape and a stand 212 having a plate shape. The leg 211 is configured to be extendable and contractable in the longitudinal direction, and one end of the leg 211 is rotatably supported on one end side of a columnar leg support member 211a. By adjusting the length of the leg 211 in the longitudinal direction and the position in the rotational direction, the electronic drum 200 can be stably supported from the floor surface.

  On the other hand, as shown in FIG. 6, one side of the leg connecting member 211b having an L shape is fixed to the other end of the leg supporting member 211a. In addition, one side of the leg connecting member 211b is fixed to the other end side of the leg support member, and the other side of the leg connecting member 211b is fixed by a bolt at the inner peripheral portion of the back surface hoop 205.

  As shown in FIGS. 5 and 6, the stand 212 is formed in a U-shaped cross section, and a central portion is recessed from the striking head 3 (not shown) side to the back cover 209 side. Thereby, since the movable range of the pedal portion when the hitting head 3 is hit with a foot pedal (not shown) is secured, the foot pedal can be arranged at a position suitable for hitting the hitting head 3.

  The stand 212 has a grounding surface that is grounded on the floor surface on one end surface side, and has an arcuate shape on the other end surface side that matches the shape of the cylindrical member 2. Two stand connecting members 212 a each having an L shape are fixed to the other end of the stand 212. One end side of the stand connecting member 212 a is fixed to the other end side of the stand 212, and the other end side of the stand connecting member 212 a is fixed by a bolt at the inner peripheral portion of the back surface hoop 205.

  As described above, since the leg 211 and the stand 212 are connected to the back surface hoop 205, the support leg member 210 is firmly held even when the cylindrical member 2 is made of a material having low rigidity. be able to. Therefore, the material of the cylindrical member 2 can be freely selected, the material cost can be suppressed, and the bass drum 200 can be reduced in weight.

  Note that when the back hoop 205 is formed, a recess portion into which the leg connecting member 211b and the stand connecting member 212a can be fitted is formed in the inner peripheral portion of the back hoop 205, so that the leg connecting member 211b and the stand connecting member 212a are formed. Can be easily positioned at the time of fixing to the back hoop 205. Furthermore, compared with the case where the hole 211 is drilled in the cylindrical member 2 and the leg 211 and the stand 212 are fixed with bolts, the leg 211 and the stand 212 can be disposed at appropriate positions. The accuracy can be ensured, and the bass drum 200 can be stably installed on the floor surface.

  Next, a bass drum 300 in the third embodiment will be described with reference to FIG. In the first embodiment, the cylindrical member 2 is clamped and fixed to the striking surface hoop 4 and the back surface hoop 5, whereas in the third embodiment, the cylindrical member 302 is composed of the striking surface hoop 4 and the pipe-shaped member. 61 is fixed. In addition, the same code | symbol is attached | subjected to the same part as above-mentioned 1st Embodiment and 2nd Embodiment, and the description is abbreviate | omitted.

  FIG. 7 is an exploded perspective view of the bass drum 300 according to the third embodiment. As shown in FIG. 7, six cylindrical projecting portions 302a projecting outward from the outer peripheral surface are attached to the outer peripheral surface of the cylindrical member 302 at equal intervals in the circumferential direction. An insertion hole 302b is formed so that the nut member 61a can be inserted therethrough. The cylinder projecting portion 302 is placed on the pipe-shaped member 61 while the first nut member 61a is inserted through the insertion hole 302b.

  When the striking surface head 3 is stretched on one end of the cylindrical member 302 and the first screw rod 62 is fastened to the first nut member 61a, the striking surface hoop 4 is attracted to the striking surface overhanging portion 41 side, Since the overhanging portion 302a is supported by the pipe-shaped member 61, the striking surface head 3 can be tensioned. Therefore, the axial length of the tubular member 302 can be shortened to reduce the material cost and reduce the weight of the bass drum 300.

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

  For example, in each of the above-described embodiments, the case where six connecting portions 6 are arranged at equal intervals in the circumferential direction has been described. However, the present invention is not necessarily limited to this, and five or less equal intervals or seven at equal intervals. Two or more may be provided.

  In each of the above-described embodiments, the case of the tom 100 and the bass drums 200 and 300 has been described as an example of the electronic drum. However, the present invention is not necessarily limited thereto, and can be applied to a snare drum.

  In the first embodiment, the mounting bracket 8 is fixed to one surface side of the mounting bracket fixing member 81 having an L-shaped cross section, and the other surface side of the mounting bracket fixing member 81 is the inner periphery of the back surface hoop 5. Although the case where it is fixed to the portion has been described, the present invention is not necessarily limited to this, and the mounting bracket fixing member 81 is a flat plate member having an I-shaped cross section, and one end side thereof is the inner periphery of the back surface hoop 5. It is good also as a structure which fixes to the part and fixes the fixture 8 to the upper surface of the other end side. Further, the mounting bracket 8 and the mounting bracket fixing member 81 may be integrally formed.

  In the first embodiment, the case where the rim sensor 72 is attached to the rim sensor support member 71 connected to the back surface hoop 5 has been described. However, the present invention is not necessarily limited to this, and the vibration of the hitting surface hoop 4 is detected. Is not necessary, the rim sensor 72 may not be provided. Needless to say, the bass drums 200 and 300 in the second and third embodiments do not include a rim sensor.

  In the second embodiment and the third embodiment, the case where the support leg member 210 includes the two legs 211 having a rod shape and the stand 212 having a plate shape has been described. The support leg member 210 may be provided with only the leg 211 or only the stand 212. Further, the support leg member 210 may include three or more legs 211, or may include three or more stands 212.

  In each of the above-described embodiments, the case where the hitting surface sensor 74 is connected to the back surface hoops 5 and 205 via the rim sensor support member 71 or the hitting surface sensor support members 73 and 273 has been described. Instead, the hitting surface sensor 74 may be directly attached to the back surface hoop 5 or may be connected via another member made of metal.

  Note that the phrase “the hitting surface sensor is attached to the back surface hoop” in claim 1 means that the hitting surface sensor 74 is connected to the back surface hoop 5 via the rim sensor support member 71 or the hitting surface sensor support members 73 and 273. , 205 includes a case where the hitting surface sensor 74 is directly connected to the back surface hoop 5, 205.

100 toms (electronic drum)
2,302 Cylindrical member 3 Hitting surface head 4 Hitting surface hoop 41 Hitting surface projecting portion 41a First hole (hole)
5,205 Back surface hoop 51 Back surface overhanging portion 6 Connecting portion 61 Pipe-shaped member 62 First screw rod (screw rod)
62a 1st engaging part (end part)
71 Rim sensor support member (part of sensor support member)
72 Rim sensor 73, 273 Strike surface sensor support member (part of sensor support member))
74 Tapping surface sensor 81 Mounting bracket fixing member 200, 300 Bass drum (electronic drum)
210 Support leg member

  The present invention relates to an electronic drum, and more particularly, to an electronic drum that can reduce the rigidity required for a cylindrical member, thereby reducing the material cost and reducing the weight.

  Conventionally, various electronic drums 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 vibration due to impact, and is configured to control a sound source based on a detection signal of the sensor to generate a musical sound corresponding to the impact.

  An electronic percussion instrument (electronic drum) disclosed in Japanese Patent Application Laid-Open No. 2008-186036 has a head as a striking surface at an opening portion on the back side (surface facing the player) of a shell (cylindrical member) as a cylindrical body. A striking sensor (striking surface sensor) that is attached with a striking surface head and detects vibration when the head is struck is attached to a frame fixed inside the shell.

JP2008-186036 (paragraph [0015] etc.)

  However, in the electronic percussion instrument described above, it is necessary to firmly fix the impact sensor and keep the contact state between the impact sensor and the head constant in order to cause the impact sensor to detect vibration when the head is impacted. There is. Therefore, since the shell to which the frame is attached is required to have high rigidity, selection of a material to be used for the shell is limited, and there is a problem that the material cost increases and the weight of the entire electronic drum increases.

  The present invention has been made in order to solve the above-described problems, and provides an electronic drum capable of reducing the rigidity required for a cylindrical member to reduce the material cost and reduce the weight. It is an object.

In order to achieve this object, an electronic drum according to a first aspect of the present invention includes a cylindrical tubular member whose both surfaces are open, a striking surface head stretched at one end of the tubular member, and the striking surface head. A striking surface hoop for pressing the outer peripheral edge, a back surface hoop disposed on the other end side of the tubular member, and a connecting portion for tightening the striking surface head by connecting and tightening the back surface hoop to the striking surface hoop. And a striking surface sensor disposed between the back surface hoop and the striking surface hoop to detect vibration of the striking surface head in contact with the striking surface head, and based on a detection signal of the striking surface sensor a shall generate a musical tone corresponding to the striking by controlling the sound source, comprising a sheet-like cover member which Kutsugae設the outer peripheral surface of the tubular member, said cover member has an outer peripheral surface of the tubular member In a non-sticking state, one side edge of the cover member is Serial inserted between the hoop and the tubular member, the other side edge of the cover member is detachably fixed by plugged is that between the tubular member and the striking surface head.

The electronic drum according to claim 2 is the electronic drum according to claim 1, wherein the cover member has a shaft of the cylindrical member in a state where the hitting head and the hitting hoop are removed from the cylindrical member. It becomes detachable by sliding along the direction .

According to the electronic drum of claim 1, the cover member is formed in a sheet shape and is not adhered to the outer peripheral surface of the cylindrical member, and one side edge of the cover member is the back hoop and the cylindrical member. Since the other side edge of the cover member is detachably fixed by being inserted between the striking surface head and the cylindrical member, the cover member can be easily attached to the outer peripheral surface of the cylindrical member. There is an effect that it can be attached. Moreover, since it is not necessary to perform the process for fixing to the outer peripheral surface of a cylindrical member with respect to a cover member, there exists an effect that the manufacturing cost of a cover member can be suppressed.
Further, by covering the outer peripheral surface of the cylindrical member with a decorative cover member with various colors and patterns, there is an effect that the player can add colors and patterns desired by the player to the cylindrical member.

According to the electronic drum of the second aspect, in addition to the effect produced by the electronic drum of the first aspect , the cover member is formed of the cylindrical member in a state where the striking surface head and the striking surface hoop are removed from the cylindrical member. Since it becomes detachable by sliding along the axial direction, there is an effect that it is possible to reduce the number of work steps when replacing the cover member.

It is a perspective view of the tom in 1st Embodiment of this invention. It is a perspective view which shows the internal structure of a tom. FIG. 3 is a side cross-sectional view of the tom taken along line III-III in FIG. 1. It is an enlarged view of the connection part in IV part of FIG. It is a perspective view of the bass drum in 2nd Embodiment. It is a rear view which shows the internal structure of a bass drum. It is a disassembled perspective view of the bass drum in 3rd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the external configuration of the tom 100 will be described with reference to FIG. FIG. 1 is a perspective view of a tom 100 according to the first embodiment of the present invention.

  The tom 100 is an electronic percussion instrument that is played using a hitting stick or the like, and includes a hitting surface sensor 74 and a rim sensor 72 (see FIG. 2), which will be described later, that detect vibration caused by hitting. A musical sound device (not shown) is configured to control a sound source based on detection signals of the striking surface sensor 74 and the rim sensor 72 and generate a musical sound in response to the striking. Through the speaker device.

  As shown in FIG. 1, the tom 100 includes a cylindrical tubular member 2 whose both ends are open, a striking surface head 3 which is stretched at one end of the tubular member 2 and serves as a striking surface, and its striking head. An annular striking surface hoop 4 that presses the outer peripheral edge of 3, a back surface hoop 5 disposed on the other end side of the tubular member 2, and the back surface hoop 5 and the striking surface hoop 4 are connected and tightened. Thus, the connecting portion 6 for tensioning the striking surface head 3 and a mounting bracket 8 attached to a support rod of a drum stand (not shown) are mainly provided.

  Next, the internal configuration of the tom 100 will be described with reference to FIG. FIG. 2 is a perspective view showing the internal structure of the tom 100, in which the tubular member 2, the hitting head 3 and the hitting hoop 4 are removed from the tom 100 (see FIG. 1).

  As shown in FIG. 2, a metal rim sensor support member 71 is fixed to the inner peripheral portion of the back surface hoop 5 with a bolt, and the hitting surface hoop 4 (see FIG. 1) is located at the upper surface side central portion of the rim sensor support member 71. 2) is attached. A striking surface sensor support member 73 having a U-shaped cross section is fixed across the rim sensor 72 at the center of the rim sensor support member 71, and the striking surface head 3 is disposed on the top surface of the striking surface sensor support member 73. A hitting surface sensor 74 having a truncated cone shape for detecting the vibration (see FIG. 1) is attached.

  The mounting bracket 8 is fixed to one surface side of the mounting bracket fixing member 81 having an L-shaped cross section, and the other surface side of the mounting bracket fixing member 81 is fixed to the inner peripheral portion of the back surface hoop 5. . Therefore, even when the cylindrical member 2 has low rigidity, the tom 100 can be reliably fixed to the drum stand.

  Next, the detailed configuration of the tom 100 will be described with reference to FIGS. 3 and 4. 3 is a side sectional view of the tom 100 taken along the line III-III in FIG. 1, and FIG. 4 is an enlarged view of the connecting portion 6 in the IV portion of FIG.

  As shown in FIG. 3, the striking surface head 3 is held by a head frame 31 having an outer peripheral edge having an annular shape, and the head frame 31 is fitted on the outer periphery of the tubular member 2. The striking surface hoop 4 is a metal member having an annular shape, and includes six striking surface projecting portions 41 formed by projecting from the outer peripheral portion at equal intervals in the circumferential direction. As shown in FIG. 4, the striking surface overhanging portion 41 has a first hole portion that is larger than the outer diameter of the first engaging portion 62a of the first screw rod 62 and smaller than the outer diameter of the first locking portion 62b. 41a is perforated.

  The back surface hoop 5 is a metal member having an annular shape, and includes a back surface projecting portion 51 that is formed by projecting from the outer peripheral portion. Moreover, the back surface overhang | projection part 51 is formed in the outer peripheral part of the back surface hoop 5 at six places at equal intervals in the circumferential direction (refer FIG. 1).

  As shown in FIG. 3, the open surface on one end side (upper side in FIG. 3) of the cylindrical member 2 is stretched with the striking surface head 3, and the open surface on the other end side (lower side in FIG. 3). Is closed by a disc-shaped back cover 9 fixed to the inner peripheral portion of the back hoop 5. The metal hitting surface hoop 4 that holds the head frame 31 of the hitting head 3 is fixed to the back hoop 5 by the connecting portion 6, and the rim sensor 72 is attached to the rim sensor support member 71 connected to the back hoop 5. ing.

  Here, the hitting surface hoop 4, the connecting portion 6, the back surface hoop 5, and the rim sensor support member 71 are all made of metal. Therefore, it is possible to efficiently transmit to the rim sensor 72 while suppressing the absorption of the vibration when the hitting hoop 3 is hit. Further, since the connecting portions 6 that serve as a transmission path until the vibration of the hitting surface hoop 4 is transmitted to the rim sensor 72 are arranged at equal intervals in the circumferential direction, regardless of where the hitting surface hoop 4 is hit, The vibration of the hitting surface hoop 4 can be transmitted to the rim sensor 72 evenly. Further, as compared with the case where the rim sensor 72 is attached to the tubular member 2, the rounding of the output waveform of the rim sensor 72 can be suppressed.

  Further, the hitting surface sensor 74 is positioned so that the upper end portion contacts the hitting surface head 3. The striking surface sensor 74 is firmly fixed by being connected to the back surface hoop 5 via the rim sensor support member 71 and the striking surface sensor support member 73, so that the striking surface head 3 can be connected regardless of the rigidity of the tubular member 2. The vibration at the time of hitting is reliably detected by the hitting surface sensor 74. Therefore, the material of the cylindrical member 2 can be freely selected, and the material cost can be suppressed and the tom 100 as a whole can be reduced in weight. Further, since the hitting surface sensor 74 is fixed to the back surface hoop 5, the positional accuracy between the hitting surface sensor 74 and the hitting surface head 3 is ensured as compared with the case where the hitting surface sensor 74 is attached to the tubular member 2. At the same time, the hitting surface sensor 74 can stably detect vibration when the hitting head 3 is hit.

  As shown in FIG. 3 or FIG. 4, the cylindrical member 2 is sandwiched and fixed by a striking surface hoop 4 and a back surface hoop 5, and a sheet-like outer peripheral surface cover member 21 is provided on the outer peripheral surface of the cylindrical member 2. It is laid. By covering the outer peripheral surface of the cylindrical member 2 with a decorative outer peripheral surface cover member 21 with various colors and patterns, it becomes possible to attach a favorite color and pattern of the performer to the cylindrical member 2. .

  Here, one side edge of the outer peripheral surface cover member 21 is inserted between the rear surface hoop 5 and the outer peripheral surface of the cylindrical member 2. Thereby, the outer peripheral surface cover member 21 can be fixed without sticking to the outer surface of the cylindrical member 2. Further, if the striking surface hoop 4 and the striking surface head 3 are removed by removing the first screw rod 62 from the pipe-shaped member 61, there is no member that blocks the outer peripheral surface of the tubular member 2. The outer peripheral surface cover member 21 can be removed from the cylindrical member 2 by pulling out one side edge from between the back surface hoop 5 and the outer peripheral surface of the cylindrical member 2. Thereby, the outer peripheral surface cover member 21 can be easily attached to the outer peripheral surface of the cylindrical member 2, and the outer peripheral surface of the cylindrical member 2 can be decorated according to liking. Furthermore, since processing for simplifying the mounting of the outer peripheral surface cover member 21 is not required, an increase in manufacturing cost can be suppressed.

  Moreover, since the outer peripheral surface cover member 21 should just be a sheet-like thing which can be mounted | worn on the outer peripheral surface of the cylindrical member 2, it can be manufactured easily and cheaply. When the performer likes the color and texture of the cylindrical member 2 itself, it is not necessary to cover the outer peripheral surface of the cylindrical member 2 with the outer peripheral surface cover member 21.

  The connecting portion 6 includes a pipe-shaped member 61, a first screw rod 62 that is screwed to the screw portion at one end of the pipe-shaped member 61, and a second screw rod that is screwed to the screw portion at the other end of the pipe-shaped member 61. 63. The pipe-shaped member 61 has a first nut-shaped member 61a formed with a threaded portion to which the first screw rod 62 can be screwed at one end on the inner peripheral surface side, and a second screw rod at the other end. The 2nd nut member 61b in which the screw part which 63 can screw together was formed is adhering.

  The first screw rod 62 includes a first engagement portion 62a that is screwed into a screw portion of the first nut member 61a, and a first locking portion 62b having an outer diameter larger than that of the first engagement portion 62a. . The second screw rod 63 includes a second engagement portion 63a that is screwed into a screw portion of the second nut member 61b, and a second locking portion 63b having an outer diameter larger than that of the second engagement portion 63a. .

  A recessed portion 51a into which the pipe-like member 61 can be fitted is recessed on the upper surface side (upper side in FIG. 4) of the rear surface overhanging portion 51, and the second screw rod 63 is formed at a substantially central portion of the recessed portion 51a. A second hole 51b that is larger than the outer diameter of the second engaging portion 63a and smaller in outer diameter than the second locking portion 63b is formed.

  The other end of the pipe-shaped member 61 is fitted in the recessed portion 51a, and the second screw rod 63 is inserted into the second nut member 61b while the second engaging portion 63a is inserted through the second hole portion 51b. The second locking portion 63 b is engaged with the back surface protruding portion 51 by being screwed. Accordingly, the second screw rod 63 is screwed to the other end of the pipe-shaped member 61, and the pipe-shaped member 61 is fixed to the back surface hoop 5.

  The second nut member 61b is fixed to the polygonal outer shape of the second nut member 61b, and the second nut member 61b is fixed so that the end of the second nut member 61b protrudes from the other end side of the pipe-shaped member 61. The end of the second nut member 61b fitted into the recessed portion 51a is formed as a recessed portion by forming the recessed portion 51a in a shape that allows the other end of the second nut member 61 and the end of the second nut member 61b to be fitted. The second screw rod 63 can be reliably fixed by the second nut member 61b by preventing the rotation within the 51a.

  Further, the first screw rod 62 is engaged with the first nut member 61a while the first engaging portion 62a is inserted through the first hole portion 41a, and the first locking portion 62b is engaged with the striking surface projecting portion 41. Are combined. By tightening the first screw rod 62 to the first nut member 61a, the striking surface hoop 4 is attracted to the striking surface overhanging portion 41 side, and the striking surface head 3 can be tensioned.

  Next, an external configuration of the bass drum 200 in the second embodiment will be described with reference to FIGS. 5 and 6. In the first embodiment, the tom 100 is fixed by being attached to a support rod of a drum stand (not shown) by the mounting bracket 8, whereas in the second embodiment, the rod-like or plate-like support leg member 210 is provided. The bass drum 200 is supported vertically from the floor surface. In addition, the same code | symbol is attached | subjected to the part same as above-described 1st Embodiment, and the description is abbreviate | omitted.

  FIG. 5 is a perspective view of the bass drum 200 according to the second embodiment, and FIG. 6 is a rear view showing the internal configuration of the bass drum 200. 6 shows the bass drum 200 with the tubular member 2, the hitting head 3 and the hitting hoop 4 removed (see FIG. 1). The bass drum 200 is one of electronic drums that are played by hitting a hitting head 3 (not shown) with a foot pedal (not shown).

  As shown in FIG. 5, a plurality of small protrusions are formed on the surface of the back cover 209, and the back cover 209 is slightly curved to the front side. As a result, when the back cover 209 is illuminated by the lighting during the performance of the bass drum, the illumination light is scattered without being reflected in one direction, so that the audience watching the performance of the bass drum facing the back cover 209 is illuminated. It is possible to prevent the reflected light from being concentrated. Further, a slight gap is formed between the back surface cover 209 and the back surface hoop 205, and the air in the tubular member 2 that vibrates due to the striking of the striking surface head 3 is released from the clearance, whereby the striking surface head 3. It is possible to reduce the volume of the hitting sound generated in the above.

  As shown in FIG. 6, the striking surface sensor support member 273 is connected to the back surface hoop 205, and the top surface of the striking surface sensor support member 273 is composed of an elastic member such as polyurethane sponge together with the striking surface sensor 74. A buffer member 275 is attached. The buffer member 275 suppresses excessive vibration of the hitting head 3 by absorbing vibration when the hitting head 3 is hit.

  As shown in FIG. 5, the support leg member 210 includes two legs 211 having a bar shape and a stand 212 having a plate shape. The leg 211 is configured to be extendable and contractable in the longitudinal direction, and one end of the leg 211 is rotatably supported on one end side of a columnar leg support member 211a. By adjusting the length of the leg 211 in the longitudinal direction and the position in the rotational direction, the electronic drum 200 can be stably supported from the floor surface.

  On the other hand, as shown in FIG. 6, one side of the leg connecting member 211b having an L shape is fixed to the other end of the leg supporting member 211a. In addition, one side of the leg connecting member 211b is fixed to the other end side of the leg support member, and the other side of the leg connecting member 211b is fixed by a bolt at the inner peripheral portion of the back surface hoop 205.

  As shown in FIGS. 5 and 6, the stand 212 is formed in a U-shaped cross section, and a central portion is recessed from the striking head 3 (not shown) side to the back cover 209 side. Thereby, since the movable range of the pedal portion when the hitting head 3 is hit with a foot pedal (not shown) is secured, the foot pedal can be arranged at a position suitable for hitting the hitting head 3.

  The stand 212 has a grounding surface that is grounded on the floor surface on one end surface side, and has an arcuate shape on the other end surface side that matches the shape of the cylindrical member 2. Two stand connecting members 212 a each having an L shape are fixed to the other end of the stand 212. One end side of the stand connecting member 212 a is fixed to the other end side of the stand 212, and the other end side of the stand connecting member 212 a is fixed by a bolt at the inner peripheral portion of the back surface hoop 205.

  As described above, since the leg 211 and the stand 212 are connected to the back surface hoop 205, the support leg member 210 is firmly held even when the cylindrical member 2 is made of a material having low rigidity. be able to. Therefore, the material of the cylindrical member 2 can be freely selected, the material cost can be suppressed, and the bass drum 200 can be reduced in weight.

  Note that when the back hoop 205 is formed, a recess portion into which the leg connecting member 211b and the stand connecting member 212a can be fitted is formed in the inner peripheral portion of the back hoop 205, so that the leg connecting member 211b and the stand connecting member 212a are formed. Can be easily positioned at the time of fixing to the back hoop 205. Furthermore, compared with the case where the hole 211 is drilled in the cylindrical member 2 and the leg 211 and the stand 212 are fixed with bolts, the leg 211 and the stand 212 can be disposed at appropriate positions. The accuracy can be ensured, and the bass drum 200 can be stably installed on the floor surface.

  Next, a bass drum 300 in the third embodiment will be described with reference to FIG. In the first embodiment, the cylindrical member 2 is clamped and fixed to the striking surface hoop 4 and the back surface hoop 5, whereas in the third embodiment, the cylindrical member 302 is composed of the striking surface hoop 4 and the pipe-shaped member. 61 is fixed. In addition, the same code | symbol is attached | subjected to the same part as above-mentioned 1st Embodiment and 2nd Embodiment, and the description is abbreviate | omitted.

  FIG. 7 is an exploded perspective view of the bass drum 300 according to the third embodiment. As shown in FIG. 7, six cylindrical projecting portions 302a projecting outward from the outer peripheral surface are attached to the outer peripheral surface of the cylindrical member 302 at equal intervals in the circumferential direction. An insertion hole 302b is formed so that the nut member 61a can be inserted therethrough. The cylinder projecting portion 302 is placed on the pipe-shaped member 61 while the first nut member 61a is inserted through the insertion hole 302b.

  When the striking surface head 3 is stretched on one end of the cylindrical member 302 and the first screw rod 62 is fastened to the first nut member 61a, the striking surface hoop 4 is attracted to the striking surface overhanging portion 41 side, Since the overhanging portion 302a is supported by the pipe-shaped member 61, the striking surface head 3 can be tensioned. Therefore, the axial length of the tubular member 302 can be shortened to reduce the material cost and reduce the weight of the bass drum 300.

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

  For example, in each of the above-described embodiments, the case where six connecting portions 6 are arranged at equal intervals in the circumferential direction has been described. However, the present invention is not necessarily limited to this, and five or less equal intervals or seven at equal intervals. Two or more may be provided.

  In each of the above-described embodiments, the case of the tom 100 and the bass drums 200 and 300 has been described as an example of the electronic drum. However, the present invention is not necessarily limited thereto, and can be applied to a snare drum.

  In the first embodiment, the mounting bracket 8 is fixed to one surface side of the mounting bracket fixing member 81 having an L-shaped cross section, and the other surface side of the mounting bracket fixing member 81 is the inner periphery of the back surface hoop 5. Although the case where it is fixed to the portion has been described, the present invention is not necessarily limited to this, and the mounting bracket fixing member 81 is a flat plate member having an I-shaped cross section, and one end side thereof is the inner periphery of the back surface hoop 5. It is good also as a structure which fixes to the part and fixes the fixture 8 to the upper surface of the other end side. Further, the mounting bracket 8 and the mounting bracket fixing member 81 may be integrally formed.

  In the first embodiment, the case where the rim sensor 72 is attached to the rim sensor support member 71 connected to the back surface hoop 5 has been described. However, the present invention is not necessarily limited to this, and the vibration of the hitting surface hoop 4 is detected. Is not necessary, the rim sensor 72 may not be provided. Needless to say, the bass drums 200 and 300 in the second and third embodiments do not include a rim sensor.

  In the second embodiment and the third embodiment, the case where the support leg member 210 includes the two legs 211 having a rod shape and the stand 212 having a plate shape has been described. The support leg member 210 may be provided with only the leg 211 or only the stand 212. Further, the support leg member 210 may include three or more legs 211, or may include three or more stands 212.

  In each of the above-described embodiments, the case where the hitting surface sensor 74 is connected to the back surface hoops 5 and 205 via the rim sensor support member 71 or the hitting surface sensor support members 73 and 273 has been described. Instead, the hitting surface sensor 74 may be directly attached to the back surface hoop 5 or may be connected via another member made of metal.

100 toms (electronic drum)
2,302 Tubular member
21 outer peripheral cover member (cover member)
4 strokes surface 3 strokes surface head hoop 41 DamenCho Deb 41a first hole
5, 205 hoop 51 backside overhanging portion 6 connecting portion 61 a pipe-like member 62 first screw rod
6 2a first engaging portion 71 rim sensor support member 72 the rim sensor 73,273 strokes surface sensor support member 74 strokes surface sensor 81 mounting bracket fixing member 200 and 300 a bass drum (electronic drum)
210 Support leg member

Claims (5)

A cylindrical tubular member whose both surfaces are open, a striking surface head stretched on one end of the tubular member, a striking surface hoop for pressing the outer peripheral edge of the striking surface head, and the other end side of the tubular member A back surface hoop disposed on the back surface hoop, a connecting portion that connects and tightens the back surface hoop to the striking surface hoop, and tensions the striking surface head, and is disposed between the back surface hoop and the striking surface hoop. In an electronic drum comprising a striking surface sensor for detecting vibration of the striking surface head in contact with the striking surface head,
The electronic drum is characterized in that the hitting surface sensor is attached to the back surface hoop. The connecting portion includes a pipe-like member having a screw portion formed therein, and a screw rod whose end is screwed to the screw portion of the pipe-like member,
The hitting surface hoop includes a hitting surface projecting portion that is formed to project from an outer peripheral portion and has a hole portion through which an end portion of the screw rod can be inserted.
The back surface hoop includes a back surface projecting portion formed by projecting from an outer peripheral portion and connected to the pipe-shaped member,
2. The electronic drum according to claim 1, wherein an end portion of the screw rod is screwed into the pipe-shaped member while being inserted into the hole portion. A rim sensor for detecting vibration of the hitting hoop,
The back hoop is connected to a sensor support member made of metal that holds the rim sensor and the striking surface sensor.
The electronic drum according to claim 2, wherein the hitting surface hoop, the connecting portion, and the back surface hoop are made of metal.   The electronic drum according to claim 1, further comprising a bar-like or plate-like support leg member connected to the back hoop.   The electronic drum according to any one of claims 1 to 3, further comprising a plate-like mounting bracket fixing member connected to the back hoop.

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