JP4556894B2 - Electronic percussion instrument device - Google Patents

Description

  The present invention relates to an electronic percussion instrument device that detects a hit of a drum board with a sensor.

  2. Description of the Related Art Conventionally, an electronic percussion instrument apparatus is configured to detect a hit on a drum board such as a pseudo cymbal with a hit sensor such as a piezoelectric element and generate a hit sound electronically based on the detection signal. The impact sensor is usually disposed below the drum board body.

For example, in the electronic percussion instrument device of Patent Document 1 below, a membrane switch as a percussion sensor is fixedly provided on the inner surface of the bottom part of the lower part of a hi-hat which is a drum board body. Further, in the electronic percussion instrument device of Patent Document 2 below, a pickup device as a percussion sensor is provided on the lower surface of the peripheral portion of the cymbal main body which is a drum board main body formed in a conical shape or a fan shape.
JP 2003-316355 A Japanese Patent No. 3658862

  However, in each of Patent Documents 1 and 2, the impact sensor is fixedly provided to the drum board main body, and is always in contact with the drum board main body. Therefore, when a plurality of drum board main bodies are played simultaneously, vibrations caused by hitting other drum board main bodies are transmitted to the drum board main body through a frame or the like, which may be detected by a hit sensor of the drum board main body. there were. That is, there has been a problem that it is easy to cause erroneous detection of hitting of the drum board main body due to noise vibration caused by hitting of the other drum board main body.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide an electronic percussion instrument that can suppress erroneous detection due to noise vibration caused by striking of another drum board body. There is to do.

  In order to achieve the above object, an electronic percussion instrument of claim 1 of the present invention comprises a support (10) and a drum board main body (10) supported by the support so as to be displaced and / or deformed by being struck. 21), a sensor attachment member (12) supported by the support member at a supported portion (12b) immediately below the drum board body, and the supported portion and free end portion (12a) of the sensor attachment member. And a sensor portion (13) for detecting that a force is applied to the free end portion and outputting a signal, and the sensor attachment member is used when the drum board body is not hit. In this case, the free end portion of the sensor mounting member is close to the predetermined portion (21c) on the lower surface of the drum board main body in a non-contact manner, and when the drum board main body is hit, The predetermined portion of the drum board main body is disposed so that the predetermined portion of the drum board main body can contact the free end portion of the sensor mounting member. A change in the output signal caused by contacting the free end of the mounting member is detected as a striking state of the drum board body.

  Preferably, the drum board main body and the sensor mounting member are each independently supported by the support body, and the drum board main body is in a state where the sensor mounting member is supported by the support body. It is configured to be detachable with respect to the support (claim 2).

  Preferably, adjustment means (18) for adjusting a gap (C1) between the predetermined portion of the drum board main body and the free end portion of the sensor mounting member is provided.

  In addition, the code | symbol in the said parenthesis is an illustration.

  According to the first aspect of the present invention, it is possible to suppress erroneous detection due to noise vibration caused by striking other drum board bodies.

  According to the second aspect, it is possible to select one of a plurality of drum board main bodies having the same attachment portion with respect to the support body and to be detachable from the support body, thereby enabling replacement of the drum board main body.

  According to the third aspect, it is possible to adjust the detection sensitivity such as a dead zone when the drum board body is hit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of an electronic percussion instrument apparatus according to an embodiment of the present invention. This electronic percussion instrument device is configured as an electronic drum. Hereinafter, the side on which the player of the percussion instrument apparatus sits is referred to as “player side” to “front side”, and the side on which the opposite audience is present is referred to as “customer side” to “back side”. In addition, the front / rear and left / right directions of the percussion instrument apparatus are referred to based on the player. FIG. 1 is a view as seen from the oblique player side.

  The percussion instrument apparatus includes a main board 30, a plurality of percussion drum boards 20 (20 </ b> A to 20 </ b> G), and an operation panel unit 39. The main board 30 is configured in a plate shape with a wood material or the like, and the outer edge 31 is configured in a horizontally long rectangle in a front view. The main board 30 is erected vertically by four leg portions 60 (only the player side 30a is shown) with the lower portion of the main board 30 floating above the floor surface. Each drum board 20 and the operation panel unit 39 can be expanded and folded with respect to the main board 30.

  On the player side surface 30 a of the main board 30, a circular frame portion 33 is provided. The frame portion 33 has a bass drum shell shape in front view so as to recall the bass drum in the acoustic drum set from the player side. In addition, a bass drum board 32 is fixedly disposed at the center portion of the frame portion 33 on the player side surface 30 a of the main board 30. The bass drum board 32 is disposed at a position corresponding to a central portion (mainly a hit portion) of the bass drum in the acoustic drum set.

  Speakers 34 (34L, 34R) are arranged on the upper left and right ends of the player side surface 30a of the main board 30. Although not shown, the main board 30 is provided with a substrate for generating musical sounds such as a tone generator circuit, an amplifier circuit, and an effect circuit. Each of the drum board 20 and the bass drum board 32 is provided with an impact sensor (described later in FIGS. 2 to 4) for detecting an impact. The detection signal of each impact sensor is sent to the substrate and converted into a musical sound signal. The musical sound signal is emitted as sound from the speaker 34 and a speaker (not shown) disposed in the frame portion 33. The operation panel unit 39 is composed of an LCD or the like, and is used by the user to make various settings such as tone color, volume, and mode.

  The drum boards 20A to 20D are configured in a drum shape such as a snare drum or a floor tom. On the other hand, the drum boards 20E, 20F, and 20G are configured in a cymbal type, and specifically, in the same arrangement positions as the crush cymbal (side cymbal), ride cymbal (top cymbal), and hi-hat cymbal, respectively. Arranged. The drum boards 20 </ b> E and 20 </ b> F are attached to the distal end portion of the arm 10 that is rotatable with respect to the main board 30.

  The drum boards 20E, 20F, and 20G that are cymbal types have the same configuration. Moreover, all of the impact sensors provided in these are configured similarly. Therefore, the drum board 20E and the impact sensor provided on the drum board 20E will be described as a representative. On the other hand, the impact sensors provided in the drum-type drum boards 20A to 20D have a known configuration similar to that shown in the above-mentioned Patent Documents 1 and 2, and the description thereof is omitted.

  2A is a side view showing a part of the drum board 20E in section, and FIG. 2B is an enlarged view showing a gap portion between the drum board main body and the sensor mounting board. FIG. 3 is an exploded view of the drum board 20E and its mounting portion. FIG. 4 is a plan view of the drum board 20E. 2 to 4, the right side is the player side.

  As shown in FIG. 3, the arm 10 is configured as a metal column having a circular cross section, and a portion above the stepped portion 10b is a small diameter portion 10a having a smaller diameter than a portion below the stepped portion 10b. The small diameter portion 10a is formed with a male screw over the entire length. A substrate holding plate 11 is fixed to the arm 10 at a position slightly below the stepped portion 10b. The substrate holding plate 11 is integrally fixed to the arm 10 by, for example, welding or screwing, but the fixing method is not limited.

  On the substrate holding plate 11, a sensor mounting substrate 12 is disposed. The sensor mounting substrate 12 has a mounted portion 12b, which is a part of the lower surface thereof, fixed to the upper surface of the sensor mounting substrate 12 by fixing or the like. The sensor mounting substrate 12 is plate-shaped and itself has flexibility. The sensor mounting substrate 12 is long on the player side as viewed from the mounted portion 12b (see FIG. 4), and an impact sensor 13 is disposed on the lower surface of the sensor mounting substrate 12 near the middle between the mounted portion 12b and the free end portion 12a. It is arranged. A lead wire 14 extends from the impact sensor 13. The impact sensor 13 is, for example, a piezoelectric detection type vibration detection sensor using a piezoelectric element, and a signal corresponding to deformation or displacement (including vibration) generated in the sensor mounting substrate 12 when the sensor mounting substrate 12 receives a force. Is output.

  A metal receiving member 15 is provided at the proximal end of the small diameter portion 10a. The receiving member 15 is a nut, for example, and is screwed into the male screw of the small diameter portion 10a and is positioned in contact with the stepped portion 10b. Note that the receiving member 15 is only required to be fixed independently of the sensor mounting board 12 at a position above the sensor mounting board 12 in the arm 10, and need not be a nut.

  In the small diameter portion 10a, a lower elastic washer 16 is disposed on the receiving member 15. The lower elastic washer 16 has a hole through which the small-diameter portion 10a can be inserted, and is inserted and disposed from the upper end of the small-diameter portion 10a after the receiving member 15 is disposed. The lower elastic washer 16 is made of hard felt, for example, but may be made of an elastic material such as urethane rubber.

  An insertion hole 21d through which the small-diameter portion 10a is inserted is formed in the central portion of the drum board main body 21 in plan view. The drum board main body 21 is inserted from the upper end of the small-diameter portion 10a, and the lower surface 21b of the drum board main body 21 in the vicinity of the insertion hole 21d is in contact with the lower elastic washer 16, so that the basic position in the vertical direction of the drum board main body 21 is reached. Is regulated. Further, the upper elastic washer 17 is disposed on the upper surface 21a of the drum board main body 21 in the small diameter portion 10a. The upper elastic washer 17 has a hole through which the small-diameter portion 10a can be inserted, and is inserted and disposed from the upper end of the small-diameter portion 10a after the drum board main body 21 is disposed. The upper elastic washer 17 is made of the same material as the lower elastic washer 16.

  Further, a fastening tool 18 such as a wing nut is provided on the upper elastic washer 17 at the upper end of the small diameter portion 10a. After the upper elastic washer 17 is disposed, the fastening tool 18 is screwed onto the male screw of the small diameter portion 10a from the upper end of the small diameter portion 10a. Therefore, the drum board main body 21 is held in a state of being sandwiched between the upper elastic washer 17 and the lower elastic washer 16 by tightening the fastening tool 18 (see FIG. 2A).

  The drum board main body 21 has an umbrella shape and a disk shape in plan view, but as shown in FIG. 2A, the central portion is slightly raised, and a drive portion in which a part of the lower surface 21b protrudes downward in a circular shape. 21c (see FIG. 2B). The free end portion 12a of the sensor mounting board 12 is located just below the drive portion 21c, and the non-contacting of the drum board body 21 keeps the clearance C1 between the free end portion 12a and the drive portion 21c without contact. It is close.

  At the time of performance, the drum board main body 21 is hit with a stick on the player side, that is, the region on the right side in FIG. Since the lower elastic washer 16 has appropriate elasticity, when the drum board main body 21 is hit, the lower elastic washer 16 contracts and the player side half of the drum board main body 21 is displaced downward. Therefore, when the ball is hit with a force of a certain level or more, the drive portion 21c of the drum board main body 21 contacts the free end portion 12a of the sensor mounting substrate 12. Moreover, the drum board main body 21 is comprised with resin etc., and has elasticity in itself. Therefore, not only the displacement of the drum board main body 21 but also the deformation may cause the drive portion 21c to contact the free end portion 12a. Note that the drum board main body 21 may be configured such that the drive portion 21c can abut on the free end portion 12a by at least one of displacement or deformation due to impact.

  When the drive unit 21c comes into contact with the free end 12a, the sensor mounting substrate 12 is deformed, and an output signal corresponding to the deformation is output from the impact sensor 13. The hit state of the drum board main body 21 is detected by a signal output from the hit sensor 13.

  Here, the gap C1 between the free end portion 12a and the drive portion 21c is set to an amount that always occurs at the time of non-hitting, and that the free end portion 12a comes into contact with the drive portion 21c by a normal hit intended for performance. Is done. Specifically, the gap C1 is set to 0.1 to 2.0 mm. The gap C <b> 1 can be adjusted by the tightening amount of the fastener 18. That is, the lower the elastic washer 16 is contracted as the fastening tool 18 is tightened, and the drum board main body 21 can be positioned downward. The adjustment of the gap C1 is also the adjustment of the dead band or the sensitivity in the hit detection.

  Since the drum board 20E is connected to the other drum board 20 via the arm 10 and the main board 30, vibration due to impact on the other drum board 20 is transmitted to the arm 10 of the drum board 20E as noise vibration. Come. However, the drum board main body 21 and the sensor mounting substrate 12 are fixed to the arm 10 independently of each other, and are provided in a non-contact state when not hit by providing the gap C1. Further, the upper elastic washer 17 and the lower elastic washer 16 elastically hold the drum board main body 21. Accordingly, even if the drum board main body 21 slightly vibrates due to noise vibration transmitted through the arm 10, the free end 12a does not contact the drive unit 21c. Thereby, it is avoided that the impact sensor 13 of the drum board main body 21 outputs a signal due to noise vibration (so-called “jumping”), and erroneous detection is suppressed.

  By the way, by loosening the fastening tool 18 and removing the upper elastic washer 17 together with the fastening tool 18, the drum board main body 21 can be removed from the arm 10, and the sensor mounting substrate 12 remains attached to the arm 10, and the drum The board body 21 is detachable. As shown in FIG. 3, in addition to the drum board main body 21, a plurality of (not limited to) alternative drum board main bodies 21-1 and 21-2 having the same insertion holes 21 d as the drum board main body 21. 21-3 is prepared. The substitute drum board main bodies 21-1, 21-2, 21-3 are different in type, for example, different in size and shape (circular, fan-shaped, etc.). The user can select a desired one of the plurality of drum board bodies 21, 21-1 to 21-3 and attach it to the arm 10.

  The drum board 20, the bass drum board 32, the operation panel unit 39, and the substrate are wired mainly through the arms supporting the drum boards 20 and the main board 30. The tone color of the musical sound generated by striking each drum board 20 and bass drum board 32 is not necessarily the same as that of a general drum device, and can be arbitrarily set by operating the operation panel unit 39. In addition, the assignment of the sound generation to the speakers can be arbitrarily set. Accordingly, even when the substitute drum board main bodies 21-1 to 21-3 are mounted, the tone color and the sound generation can be freely assigned to the speakers, and the drum board 20E is set as another kind of drum. It can also be used.

  According to the present embodiment, when the drum board main body 21 is not hit, the free end portion 12a of the sensor mounting substrate 12 is close to the driving portion 21c of the drum board main body 21 in a non-contact manner with the gap C1. In addition, since it can come into contact at the time of hitting, it is not affected by noise vibration caused by hitting of other drum boards. Therefore, erroneous detection of the striking state can be suppressed.

  Further, since the gap C1 can be adjusted by the degree of tightening of the tightening tool 18, it is possible to adjust the detection sensitivity such as a dead zone when the drum board 21 is hit. For example, it is possible to adjust the detection sensitivity of the drum boards 20E, 20F, and 20G to be uniform, or to reduce only the sensitivity of the right drum board 20F compared to the other two. Therefore, for example, even if a right-handed player exerts too much force only on the drum board 20F, the detection sensitivity can be adjusted to be uniform, or can be adjusted intentionally to the left / right unbalance.

  In addition, since the gap C1 is present and an appropriate dead zone is obtained, the accuracy of the hit detection by the hit sensor 13 is not easily influenced by the vibration mode of the drum board main body 21 itself. Thereby, the position where the drum board main body 21 should be struck is not limited to a narrow range for appropriate sensing, and the way of hitting is also not easily limited, so that stable sensing can always be performed.

  Further, since the drum board main body 21 is configured to be detachable from the arm 10 with the sensor mounting board 12 being attached to the arm 10, one of the plurality of drum boards having the same mounting portion with respect to the arm 10 is provided. Can be selected and supported by the arm 10, and the drum board body 21 can be replaced. In particular, the drum board main body 21 can be exchanged without exchanging the impact sensor 13, and it is easy to obtain an appropriate sensitivity according to the mounted drum board main body 21 by adjusting the gap C1 each time the drum board main body 21 is exchanged.

  The hit sensor 13 only needs to detect a force applied to the free end 12a of the sensor mounting substrate 12 and output a signal. Therefore, the optical sensor is not limited to one using a piezo element, and may be, for example, an optical sensor or the like disposed so as to be able to detect the displacement of the free end 12a with respect to the arm 10.

1 is a perspective view of an electronic percussion instrument device according to an embodiment of the present invention. FIG. 2 is a side view (a part (a)) of the drum board, showing a part thereof in cross section, and an enlarged view (a part (b)) showing a gap portion between the drum board body and the sensor mounting board. It is an exploded view of a drum board and its attachment part. It is a top view of a drum board.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Arm (support body), 12 Sensor attachment board | substrate (sensor attachment member), 12a Free end part, 12b Attached part (supported part), 13 Impact sensor (sensor part), 18 Fastening tool (adjustment means), 20 drums Board, 21 drum board main body (drum board), 21c driving part (predetermined part), C1 gap

Claims (3)

A support;
A drum board body supported by the support so as to be displaced and / or deformed by being struck,
A sensor attachment member supported by the support at the supported portion directly under the drum board body;
A sensor part that is attached between the supported part and the free end part of the sensor attachment member, detects that a force is applied to the free end part, and outputs a signal;
The sensor mounting member is configured such that, when the drum board body is not struck, the free end portion of the sensor mounting member is adjacent to a predetermined portion of the lower surface of the drum board body in a non-contact manner, and the drum board At the time of hitting the main body, the predetermined portion of the drum board main body is arranged so as to be able to contact the free end portion of the sensor mounting member,
When the drum unit hits the drum board main body, the sensor unit detects a change in an output signal caused by the predetermined portion of the drum board main body coming into contact with the free end of the sensor mounting member. An electronic percussion instrument configured to detect as:   The drum board body and the sensor mounting member are each independently supported by the support body, and the drum board body is attached to the support body in a state where the sensor mounting member is supported by the support body. 2. The electronic percussion instrument device according to claim 1, wherein the electronic percussion instrument device is detachable from the electronic percussion instrument.   3. The electronic percussion instrument device according to claim 1, further comprising an adjusting means for adjusting a gap between the predetermined portion of the drum board main body and the free end portion of the sensor mounting member.

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