JP5720348B2 - Pedal device for electronic percussion instruments - Google Patents

Description

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

  Conventionally, pedal devices for electronic percussion instruments are known. For example, a pedal device shown in Patent Document 1 below is mounted on a grounding surface (floor surface) while a rear portion is attached to a pipe-like attachment member in a rack that supports a pad.

  In addition, the footboard is inclined upward at the time of non-depressing operation, and becomes almost horizontal when depressed. Therefore, when the footboard is stepped on, a vertical force is applied to the grounding surface via the base portion of the pedal device, and a backward force is applied to the mounting member in the rack.

JP 2008-233523 A

  However, in the conventional pedal device including the above-described Patent Document 1, hard rubber provided on the lower surface of the base portion abuts on the grounding surface, and the rear portion of the pedal device is rigidly connected to a rack mounting member. For this reason, the above-described force generated by depressing the pedal transmits the vibration in the vertical direction to the ground contact surface, and mainly transmits the vibration in the front-rear direction to the rack.

  These vibrations not only generate sound, but especially in relation to the rack, the vibration of the pedal device is transmitted to the pad supported by the rack, and conversely, the vibration is transmitted from the pad to the pedal device. There is also. Therefore, it adversely affects the operation feeling.

  The present invention has been made to solve the above-described problems of the prior art, and an object thereof is to suppress vibration transmission to the rack and the ground plane.

  In order to achieve the above object, a pedal device for an electronic percussion instrument according to claim 1 of the present invention is centered on a base portion (11) and a rotating shaft (21) provided at the front portion of the base portion by a stepping operation. A pedal device for an electronic percussion instrument that is attached to and used with respect to a mounting member (29) in a rack of the electronic percussion instrument, and includes a first elastic body (30). ), And a mounted portion (12) attached to the mounting member in the rack, and a second elastic body (40) provided on the lower surface of the base portion and in contact with the grounding surface (24). The elastic member is elastically supported on the rack and the grounding surface via the first elastic body of the attached portion and the second elastic body of the base portion.

  Preferably, in the attached portion, the first elastic body includes a plurality of protrusions (31, 32) protruding rearward and toward the attachment surface (29a) of the attachment member. . Preferably, the plurality of protrusions have a plurality of types having different projecting heights, and some of the protrusions (32) do not contact the mounting surface during a non-depressing operation. Preferably, the second elastic body of the base portion includes a plurality of protrusions (41, 42) protruding toward the grounding surface. Preferably, the plurality of protrusions have a plurality of types having different protruding heights, and some of the protrusions (42) do not contact the grounding surface during a non-depressing operation.

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

  According to claim 1 of the present invention, vibration transmission to the rack and the ground plane can be suppressed.

  According to the second aspect, it is possible to suppress the transmission of vibration due to the backward force at the time of depression.

  According to the third and fifth aspects, the acting spring constant can be changed stepwise.

  According to the fourth aspect, it is possible to suppress the transmission of vibration due to the downward force when the pedal is depressed.

1 is a schematic plan view, a side view, and a bottom view of a pedal device for an electronic percussion instrument according to an embodiment of the present invention. FIG. 3 is a side view, a front view, and a longitudinal sectional view and a bottom view of one grounding elastic body. It is a figure which shows the frequency characteristic of the vibration transmission which the elastic body for grounding has. It is the top view and side view of the front part of the pedal apparatus attached to a vertical pipe. It is a longitudinal cross-sectional view which shows the modification of the elastic body for grounding.

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

  1A, 1B, and 1C are a schematic plan view, a side view, and a bottom view of a pedal device for an electronic percussion instrument according to an embodiment of the present invention. This pedal device is configured as a kick pedal used for an electronic bass drum as an electronic percussion instrument, for example. This pedal device is used by being placed on the floor surface 24 as a ground contact surface, and a performance operation is performed by stepping on the foot board 20. FIG. 1 shows a free state in which the footboard 20 is in a non-operating state. Hereinafter, the front and rear and up and down directions of the pedal device are based on the state of being placed on the horizontal floor surface 24, and the left side and the upper side in FIG.

  The pedal device includes a base portion 11 that is horizontal on the floor surface 24 and a cover 12 that protrudes upward from the rear half of the base portion 11. A plate-like footboard 20 is disposed on the base portion 11.

  A heel 19 is provided at the front portion of the base portion 11, and a rotating shaft 21 is provided on the heel 19 along the left-right direction (vertical direction in FIG. 1A). A front end 20 a of the foot board 20 is pivotally supported on the rotating shaft 21. As a result, the footboard 20 has a rear end portion 20b, which is a free end portion, about the rotation shaft 21, and is rotatable in the vertical direction (clockwise and counterclockwise in FIG. 1B). Hereinafter, with regard to the rotation direction, the direction in which the rear end portion 20b rotates in the clockwise direction is also referred to as “stepping-in direction”, and the direction in which it rotates in the counterclockwise direction is also referred to as “step-up direction”. A pusher 22 extends forward in the lower part of the rear end 20b of the footboard 20.

  A coil spring 16 is disposed at an intermediate portion in the front-rear direction of the base portion 11. The coil spring 16 is connected and fixed to the upper surface of the base portion 11 and the lower surface of the foot board 20. In a non-operating state in which no foot is put on and in a free state, the foot board 20 is slightly compressed by the weight of the coil spring 16 and is in an equilibrium state as shown in FIG. The footboard 20 has a rotatable range between an upper limit position in the step-up direction and a lower limit position in the step-down direction (depression end position).

  An actuator 14 is disposed on the upper surface of the base portion 11. The actuator 14 is made of an elastic body such as rubber, and has a front end fixed to the base portion 11 and a rear half curved upward to draw an arc. A sensor having a sensor pattern (not shown) is provided on the upper surface of the base portion 11 below the actuator 14.

  The footboard 20 is stepped on and the free end (rear end) of the actuator 14 is pressed by the pusher 22. When the actuator 14 is pressed until it is almost horizontal, it becomes the forward rotation end position of the footboard 20, that is, the lower limit position of the stepping direction described above.

  When the actuator 14 contacts the sensor, a detection signal corresponding to the contact state is output. The contact area increases as the deformation of the actuator 14 increases, that is, as the rotation angle of the foot board 20 in the stepping direction with respect to the base portion 11 increases. The sensor 15 is configured such that the electrical resistance value decreases as the contact area with the actuator 14 increases. By grasping the change in the resistance value, the position and the stepping strength of the footboard 20 are detected, and the volume and tone color of the generated sound can be changed accordingly.

  The detection signal is output through a jack (not shown), and the output signal is sent as a batting performance trigger signal to a signal processing unit (not shown) and converted into batting performance data or converted into sound in real time. Any sensor configuration may be used as long as the position and pressing strength of the footboard 20 can be detected by the pressing force from the actuator 14. For example, a piezo sensor may be used.

  On the other hand, when the pedal device is held by hand and turned upside down, the footboard 20 may rotate greatly in the step-up direction. In that case, the upper limit position in the step-up direction is defined by the restriction piece 23 (FIG. 1B) fixed to the footboard 20 abutting against a stopper portion (not shown) provided on the cover 12.

  A plurality (four) of grounding elastic bodies 40 are attached and fixed to the lower surface of the base portion 11. The pedal device is supported on the floor surface 24 via the four grounding elastic bodies 40. On the other hand, the front portion of the cover 12 is attached to a pipe 29 which is an attachment member in the rack, and thereby the pedal device is fixed to the rack. In other words, the rack elastic body 30 is provided at two locations in the width direction of the cover 12 at the lower front portion of the cover 12 (FIG. 1C), and the rack elastic body 30 wraps the upper half of the pipe 29. Grabbing like Accordingly, the pedal device is supported at a fixed position by the rack pipe 29 and the floor 24.

  By the way, the rack is a drum stand that supports a plurality of pads (not shown), of which the pipe 29 is disposed so as to lie on the floor surface 24. In the example shown in FIG. 1, the direction substantially perpendicular to the pipe 29 is the front-rear direction (longitudinal direction) of the pedal device.

  FIGS. 2A and 2B are a side view and a front view of one rack elastic body 30. The configuration of the two rack elastic bodies 30 is the same. The rack elastic body 30 is formed in a U-shape that opens downward in a side view. A groove 33 is formed outside the U-shape of the rack elastic body 30. The rack elastic body 30 is attached to the cover 12 by fitting the groove 33 to the rib 12a of the cover 12 and fixing the groove 33 by adhesion or the like.

  Protrusions 31 and 32 protrude from the U-shaped inner surface 30 a of the rack elastic body 30. The projecting portions 31 and 32 project toward the center of the pipe 29 having a circular cross section. In addition, the protrusions 31 and 32 include those facing rearward, those facing frontward, and those facing downward. That is, the protrusions 31 and 32 surround the pipe 29 from the front and rear and from above.

  There are two types of protruding heights of the protruding portions 31 and 32, and the protruding portion 31 has a higher protruding height than the protruding portion 32. During a non-depressing operation when the pedal device is not played, the tip of the protrusion 31 is in contact with the outer peripheral surface 29a, which is the mounting surface of the pipe 29, but the protrusion 32 is not in contact with the outer peripheral surface 29a.

  FIG. 2C is a longitudinal sectional view of one grounding elastic body 40. FIG. 2D is a bottom view of one grounding elastic body 40. The configuration and mounting manner of the four grounding elastic bodies 40 are the same. The grounding elastic body 40 has a disk part 43, and the disk part 43 is screwed and fixed to the base part 11 with screws 24.

  From the lower surface 43a of the disk part 43, the projection parts 41 and 42 protrude downward. There are two types of protruding heights of the protruding portions 41 and 42, and the protruding portion 41 has a higher protruding height than the protruding portion 42. During a non-depressing operation when the pedal device is not played, the tip of the protrusion 41 is in contact with the floor surface 24, but the protrusion 42 is not in contact with the floor surface 24.

  Therefore, the pedal device is elastically supported by the pipe 29 and the floor surface 24 only through the rack elastic body 30 and the ground elastic body 40. The elastic materials and properties used for the rack elastic body 30 and the ground elastic body 40 are determined in consideration of the vibration of the pedal device being hardly transmitted to the pipe 29 and the floor surface 24. First, the grounding elastic body 40 will be described as a representative.

  FIGS. 3A and 3B are diagrams showing frequency characteristics of vibration transmission of the grounding elastic body 40. The natural frequency (resonance frequency) f0 varies depending on the spring constant or mass employed for the grounding elastic body 40. A curve L1 shown in FIG. 3A is a characteristic when the spring constant is reduced or the inertia is reduced by reducing the mass compared to the curve L2. The transmission efficiency of vibration becomes 1 or less at a frequency higher than 1.4 times the natural frequency f0 (= 1.4f0), and the effect of blocking the vibration is enhanced. Therefore, it is preferable to select an elastic material that has the natural frequency f0 as low as possible.

  Further, as shown by curves C1 to C4 in FIG. 3B, even if the natural frequency f0 is the same, the vibration transmission efficiency changes due to the loss of the elastic material to be selected. For example, by using a material having a high degree of attenuation, an increase in transmitted vibration can be suppressed to a low level as shown by a curve C4.

  From these viewpoints, in the present embodiment, an elastomer (natural rubber, EPDM, BR, CR, silicon, etc.) is used for the grounding elastic body 40. The same material is also used for the rack elastic body 30.

  In such a configuration, when the footboard 20 is stepped on from the non-performance operation state, the footboard 20 rotates about the rotation shaft 21 in the clockwise direction in FIG. Then, first, a rearward force is generated from the footboard 20, and the protrusion 31 is crushed (elastically deformed) among the protrusions 31 and 32 protruding rearward in the rack elastic body 30. At this time, if the force to the rear is equal to or greater than a certain level, the protrusion 32 around the collapsed protrusion 31 comes into contact with the outer peripheral surface 29 a of the pipe 29. When a very large force is applied, the protrusion 32 is also crushed and the inner surface 30 a of the rack elastic body 30 comes into contact with the outer peripheral surface 29 a of the pipe 29.

  In this way, the protrusions 31 and 32 and the inner surface 30a act in order according to the magnitude of the force, and the reaction force is increased stepwise. This is about the backward force, but with respect to the downward force, the protrusions 31 and 32 projecting from the ceiling of the inner surface 30a of the rack elastic body 30 act in the same way, and the forward force. , The protrusions 31 and 32 projecting forward act in the same manner.

  The acting spring constant varies stepwise depending on which of the protrusions 31 and 32 and the inner surface 30a are in contact. By setting so that the frequency at which the protrusions 32 do not act is high, in many cases, if only the protrusions 31 are in contact, the vibration blocking effect is high.

  On the other hand, due to the downward force from the footboard 20, the magnitudes of the forces on the protrusions 41 and 42 of the ground elastic body 40 and the lower surface 43a of the disk part 43 are the same as those of the protrusions 31 and 32 and the inner surface 30a. In response to the above, in order to contact the floor surface 24 step by step. The protrusion 42 and the lower surface 43a of the disk portion 43 can come into contact with the floor 24 when the footboard 20 is at the lower limit position in the stepping direction. By the way, with respect to the downward force from the footboard 20, the protrusions 41 and 42 of the grounding elastic body 40 and the protrusions 31 and 32 projecting downward in the rack elastic body 30. Act in cooperation.

  According to the present embodiment, the pedal device is elastically supported by the rack and the floor surface 24 via the rack elastic body 30 and the grounding elastic body 40, so that vibration transmission to the rack and the floor surface 24 is performed. Can be suppressed.

  In addition, since the rack elastic body 30 and the ground elastic body 40 each have a plurality of types of protrusions having different projecting heights, the acting spring constant can be changed stepwise. In particular, compared with a simple elastic body, it is easy to design the spring constant appropriately depending on the number and shape of the protrusions.

  By the way, although the elastic body 30 for racks was formed so that the semicircle part of the upper side of the pipe 29 might be covered (FIG. 2 (a)), you may comprise so that the perimeter of the pipe 29 may be covered.

  It is not essential that the protrusions 31, 32, 41, 42 are formed integrally with the rack elastic body 30 and the ground elastic body 40. Moreover, you may employ | adopt a different material for every projection part from which protrusion height differs. Moreover, although the protrusion height of the protrusion is two types, it may be three or more.

  When the foot board 20 is stepped on, a force is applied mainly to the pipe 29 backward. Therefore, from the viewpoint of simplifying the configuration, the protrusions 31 and 32 may be provided with only those that abut on the outer peripheral surface 29a on the front side of the pipe 29. Further, as shown in FIG. 4, the rack mounting member (pipe 29) does not necessarily extend in the left-right direction.

  4A and 4B are a plan view and a side view of the front part of the pedal device attached to the vertical pipe 29. FIG. When the pedal device is attached to the pipe 29 extending in the vertical direction in the rack, the rack elastic body 30 is configured in a U-shape that opens rearward. And the rack elastic body 30 is arrange | positioned so that the front half part of the pipe 29 may be covered. A case clamp 13 is provided at the rear of the cover 12, and an elastic body 50 is attached to the front surface of the case clamp 13. The elastic body 50 is brought into contact with the rear part of the pipe 29. The setting of the protruding heights of the protrusions 31 and 32 is the same as in the example of FIG.

  Thus, the pedal device is elastically supported on the rack and the floor surface 24 via the rack elastic body 30 and the ground elastic body 40. The rearward and left-right force of the pedal device is received by the protrusions 31 and 32 of the rack elastic body 30, and the forward force is received by the elastic body 50. The material of the elastic body 50 may be the same as that of the rack elastic body 30. Further, the elastic body 50 may be provided with a projection similar to the projections 31 and 32.

  Further, from the viewpoint of suppressing vibration transmission, the protrusions 31, 32, 41, and 42 are not essential and may have elasticity. The shape of the elastic material and the elastic body is not limited to the above examples. The modification of FIG. 5 will be described by taking the grounding elastic body 40 as an example.

  FIGS. 5A to 5E are longitudinal sectional views showing modifications of the grounding elastic body 40. First, as in the example shown in FIG. 5A, the grounding elastic body 40 may be a sponge-like elastic body having bubbles. The spring constant is appropriately set according to the hardness of the elastic body and the contact area with the floor surface 24, and the loss is adjusted in the loss of material freely and in the bubble state.

  Further, as shown in FIG. 5B, an elastic body such as solid rubber may be employed. As for the attachment mode, as shown in FIG. 5C, the grounding elastic body 40 may be disposed from the upper side of the base portion 11 so that a part thereof protrudes below the base portion 11. . In this case, since the head of the screw 45 is not below the base portion 11, the distance between the base portion 11 and the floor surface 24 can be reduced.

  Further, as shown in FIG. 5 (d), the grounding elastic body 40 may be provided with a flange portion 40 b so as to penetrate and fit into the hole of the base portion 11. In this case, a screw for fixing becomes unnecessary, and the number of parts is reduced.

  Alternatively, as shown in FIG. 5 (e), a metal spring 47 may be employed as the grounding elastic body 40. Since the spring constant can be adjusted by the wire diameter, outer shape, and effective number of turns of the metal spring 47, the spring constant can be designed more accurately than rubber or the like, and the natural frequency f0 can be easily set. Since the metal spring 47 itself has a small loss, the outer periphery of the metal spring 47 is coated with a rubber material 46 in order to ensure a high loss. In addition, when an elastic body with a small loss such as the metal spring 47 is employed, a material such as rubber may be provided in parallel.

  Each modification shown in FIG. 5 is also applicable to the rack elastic body 30 as appropriate.

  As long as the vibration transmission to the floor surface 24 is limited, the pedal device can be elastically supported on the floor surface 24 via the grounding elastic body 40 without providing the rack elastic body 30. There is a certain effect.

  DESCRIPTION OF SYMBOLS 11 Base part, 12 Cover (attached part), 20 Foot board, 21 Rotating shaft, 24 Floor surface (grounding surface), 29 Pipe (attachment member), 29a Outer peripheral surface (attachment surface), 30 Elastic body for rack ( First elastic body), 31, 32, 41, 42 protrusion, 40 grounding elastic body (second elastic body)

Claims (5)

An electronic device that includes a base portion and a footboard that is rotatable about a rotation shaft provided at a front portion of the base portion by a stepping operation, and is attached to a mounting member in a rack of an electronic percussion instrument. A pedal device for a percussion instrument,
An attached portion having a first elastic body and attached to the attachment member in the rack;
A second elastic body provided on the lower surface of the base portion and in contact with the grounding surface;
A pedal for an electronic percussion instrument, wherein the pedal is elastically supported by the rack and the grounding surface via the first elastic body of the attached portion and the second elastic body of the base portion. apparatus.   2. The electronic device according to claim 1, wherein, in the attached portion, the first elastic body includes a plurality of protrusions protruding rearward and toward an attachment surface of the attachment member. Pedal device for percussion instruments.   The plurality of types of projections having different projecting heights exist in the plurality of projections, and some types of projections do not contact the mounting surface during a non-depressing operation. Pedal device for electronic percussion instruments.   4. The electronic percussion instrument according to claim 1, wherein the second elastic body of the base portion includes a plurality of protrusions protruding toward the grounding surface. 5. Pedal device.   5. The plurality of protrusions having a plurality of types having different projecting heights, and some types of the protrusions do not contact the grounding surface during a non-depressing operation. Pedal device for electronic percussion instruments.

Images