JP2007017525A - Input structure of blowing information of electric wind instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an input structure of of blowing information of an electric wind instrument, capable of stabilizing tone pitch of reproduced playing sound by correctly detecting the direction of breath. <P>SOLUTION: The electric wind instrument 10 comprises a conversion device 16 for outputting an electrical signal by detecting pressure of the breath; and a guide member 13 for guiding the breath to the conversion device 16, which is arranged apart from lips P1 and P2 of the player P. Position sensors 28 and 28 are provided in the guide member 13. One position sensor 28 is provided so that a position of an upper lip P2 can be detected; while the other position sensor 28 is provided so that the position of the lower lip P1 can be detected. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an input structure for playing information of an electric wind instrument, and more particularly to an input structure for playing information of an electric wind instrument that can detect the playing state of a performer.

  In recent years, various electric musical instruments that can output an electric signal using a performance operation as an input and reproduce an electric sound based on the output have come into wide use. Here, for example, in the case of configuring an electric musical instrument that can be input by a blowing operation similar to a flute, a structure disclosed in Patent Document 1 is known as a structure for detecting the expiration.

  In Patent Document 1, a flute-type electric musical instrument is provided on a tube body including a head tube, an air outlet provided in the head tube, and an inner surface side of the head tube around the air outlet. And a sensor. A plurality of sensors are installed along the circumferential direction of the head tube, and detect the exhalation pressure and the exhalation direction of the performer. That is, when the performer plays through the air outlet, each sensor outputs a detection signal corresponding to the expiration pressure, and at the same time, the detection signal is compared and controlled, and the difference in the expiration pressure between the sensors is also detected. Detecting and detecting the direction of exhalation from the difference in pressure, and adjusting the pitch to be reproduced based on the difference in the direction.

JP-A-7-199919

  However, in the structure of Patent Document 1, it is difficult to detect exhalation by a sensor when performing in the same manner as an acoustic type flute. This is because, in general, the change in the pressure of exhalation accompanying the performance of the flute is small, and since the breath is blown into the open space, the pressure of the exhalation reaching the sensor is more likely to be lower than at the time of blowing. Therefore, the difference in pressure between the sensors is also reduced, which leads to inconvenience that it is difficult to detect the direction of expiration and it is difficult to stably adjust the pitch.

[Object of invention]
The present invention has been devised by paying attention to such inconveniences, and an object of the present invention is to detect the direction of expiration well and stabilize the pitch of the performance sound to be reproduced. An object of the present invention is to provide an input structure for wind information of an electric wind instrument.

In order to achieve the above object, the present invention provides a conversion device that detects an exhalation pressure and outputs an electrical signal, and a guide member that guides the exhalation to the conversion device and that is disposed away from the lips of the performer. An electric wind instrument input structure comprising:
The guide member is provided with a position sensor capable of detecting the position of the lips.

  In the present invention, a plurality of the position sensors are provided, and at least one position sensor is provided so as to detect the position of the upper lip, while at least one other position sensor can detect the position of the lower lip. It is preferable to be provided.

  Furthermore, it is preferable that the guide member includes a hole having an opening on the lip side, and the position sensor is provided in the hole.

  Moreover, it is good to employ | adopt the structure that the cover member in which an outer surface is located in the open part side of the said hole on the substantially the same surface as the formation surface of a guide member is provided.

  According to the present invention, it is possible to stably detect the direction of expiration during performance by detecting the position of the lips without detecting the pressure of expiration as in the prior art. More specifically, for example, in the flute, the position of the lips inevitably changes when the direction of exhalation is changed in order to adjust the pitch. Regardless of the strength of the pressure, information on the required pitch can be obtained, and the pitch of the reproduced sound can be stabilized.

  Further, by detecting the positions of the upper lip and the lower lip, the direction of expiration can be detected more accurately.

  Further, since the position sensor is provided in the hole of the guide member, the position sensor can be made inconspicuous or the position sensor can be protected from protruding from the surface of the guide member. Further, for example, when the position sensor includes a light emitting element and a light receiving element to perform position detection, the light emission can be narrowed by the hole, and the position sensor can avoid the reflected light from the lips being received by another position sensor. Detection stabilization can be achieved.

  In addition, the position sensor can be better protected by providing a cover member at the opening of the hole. In addition, since the formation surface of the guide member and the outer surface of the cover member are located on substantially the same surface, it is possible to prevent the flow of exhalation from being disturbed inadvertently and to stabilize the detection of exhalation pressure by the conversion device. .

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

[First Embodiment]
FIG. 1 shows a front view of a part of the electric brass instrument according to the first embodiment, and FIG. 2 shows a partial right side view of FIG. In these drawings, an electric wind instrument 10 includes a flute forming body 11 having a structure substantially similar to a so-called acoustic type flute, and a guide member 13 located in the vicinity of a lip plate 12 provided on the flute forming body 11. The conversion device 16 is connected to the guide member 13 via a flow passage 15 made of a hose and the like, and a connecting portion 17 that connects the guide member 13 and the flute forming body 11 is provided.

  The flute forming body 11 includes a head tube forming body 19 formed in a cylindrical shape or a columnar shape, and a main tube and a foot tube forming body (not shown) located on the right side of the head tube forming body 19 in FIG. It is prepared for. The main tube and the foot tube forming body are formed in a cylindrical shape or a column shape extending along substantially the same axis as the head tube forming body 19. Further, the main tube and the foot tube forming body are provided with a plurality of keys (not shown) connected to a control device, which will be described later, on the outer peripheral surface side so that each key can be operated such as pressing by the fingertip of the player P It has become.

  The lip plate 12 is provided along the outer peripheral surface of the head tube forming body 19 from the upper side of the head tube forming body 19 in FIG. 1 toward the player P side. The lip P1 and its periphery are in contact with each other. The lip plate 12 is a lip plate used for an acoustic-type flute, that is, a plate having an oval shape in plan view, and has a shape that is cut out in a region indicated by a two-dot chain line L1 in FIG. Is set to non-interference. As shown in FIG. 1, a hole or notch having the same position and shape as the flute mouth is formed at the position indicated by a two-dot chain line L2 in the same figure in the lip plate 12 and the head tube forming body 19. May be.

  The guide member 13 includes a main body cylinder 20 provided in a megaphone shape, a first opening 21 formed on one end side of the main body cylinder 20, that is, an upper right end side in FIG. 1, and the other end side of the main body cylinder 20. That is, the second opening 22 formed on the lower left side in the figure is provided so that the exhalation of the player P can be guided to the conversion device 16.

  The main body cylinder 20 has a tapered shape in which the opening area gradually decreases from the first opening 21 toward the second opening 22. The main body cylinder 20 is arranged so that the axial direction thereof is along the blowing direction F of the performer P exhalation (the diagonally lower left direction in FIG. 1), and the exhaled air that is blown into the first opening 21 is the second opening. 22 is passed through. The axial length C1 of the main body cylinder 20 is set to be longer than the maximum inner diameter D1 of the first opening 21, and is not particularly limited, but is set to about three times the maximum inner diameter D1.

  Here, as shown in FIG. 3, the main body cylinder 20 includes a thick portion 24 formed in a region along the outer periphery on the first opening 21 side, and a region in which the thick portion 24 is formed. An upper hole 25 and a lower hole 26 formed on both the middle and upper sides are provided. The upper hole 25 includes an open portion 25A directed toward the upper lip P2, while the lower hole 26 includes an open portion 26A directed toward the lower lip P1. Transparent cover members 27, 27 having a thin plate shape are provided on the open portions 25A, 26A side, respectively, and the outer surfaces of these cover members 27, 27 are located on substantially the same plane as the inner peripheral surface of the main body cylinder 20. It becomes the shape to do. Thereby, it is possible to prevent the exhalation flow from being disturbed unintentionally on the outer surface of the cover member 27 and to prevent the exhalation from flowing into the upper hole 25 and the lower hole 26.

  Position sensors 28 and 28 are provided at positions inside the upper hole 25 and the lower hole 26 and inward from the cover member 27, respectively. The position sensor 28 in the upper hole 25 is provided so as to detect the position of the upper lip P2 of the player P, while the position sensor 28 in the lower hole 26 is provided so as to detect the position of the lower lip P1. Yes. Each position sensor 28 is not particularly limited, but a light emitting element that emits near infrared light and irradiates the lower lip P1 or the upper lip P2, and a light receiving element that receives the near infrared light reflected from the lower lip P1 or the upper lip P2. The thing of the type provided with can be illustrated. Each position sensor 28 is connected to a control device described later.

  Although the detailed structure of the conversion device 16 is omitted here, it is constituted by an atmospheric pressure sensor, and functions according to the function of detecting the pressure of exhaled air flowing through the second opening 22 and the detected pressure. And a function of outputting an electrical signal that changes. The electrical signal output from the conversion device 16 is input to the control device 30 connected via a predetermined wiring structure.

The control device 30 is provided so as to perform predetermined processing to reproduce the electric signal of the conversion device 16 as electric sound, and to output the processed signal to a sound source device (not shown) including an amplifier, a speaker, and the like. Examples of the control device 30 include an integration circuit and a low-pass filter circuit. The control circuit 30 outputs a signal obtained by converting the electrical signal of the conversion device 16 into wind speed information by the integration circuit, and the signal is stabilized by the low-pass filter circuit. It is detected as a parameter close to the wind speed. Specifically, the integration circuit integrates electrical signals including pressure information that is strong at the rise of the wind and then weakens, thereby imitating a function that simulates stable wind speed information that is not strong but remains constant. Demonstrate. On the other hand, the low-pass filter circuit exhibits a function of cutting a high-frequency signal component and passing only a DC stable signal.
In addition, the control device 30 amplifies the electrical signals output from the position sensors 28 and 28 into an analog signal, which is converted into a digital signal by the CPU, and then obtains position information via a predetermined calculation routine. It is provided as follows.
The control device 30 is also provided so as to be able to control signals from the respective keys of the flute forming body 11 described above, and can also adjust the pitch and pitch of the reproduced sound from the reproducing device.

  The connecting portion 17 penetrates the head tube forming body 19 and is located at the left and right sides of the lip plate 12 in FIG. 2, respectively, and a lower portion of the holding members 32, 32 in the drawing. A bar 33 extending substantially parallel to the head tube forming body 19, a rail member 34 supported by the bar 33 and extending while bending in the upper left direction in FIG. 1, and an extension of the rail member 34 The slider 36 is movable along the direction, and the holding member 37 is supported by the slider 36 and sandwiches the guide member 13 from both sides in the direction orthogonal to the paper surface in FIG. A stopper (not shown) is provided between the rail member 34 and the slider 36, and the slider 36 is restricted from moving at any position along the rail member 34 by the stopper. Therefore, the position and orientation of the guide member 13 can be changed via the rail member 34 and the slider 36, and as a result, it is easy to blow against the guide member 13, and the exhaled air is well blown into the guide member 13. The relative position and relative angle between the head tube forming body 19 and the lips of the player P and the guide member 13 can be adjusted.

  In the above configuration, when the electric wind instrument 10 is played, after the position and orientation of the guide member 13 are adjusted, the wind may be performed in the same manner as the flute. Specifically, the lower lip P1 and the periphery thereof are brought into contact with the lip plate 12, and the first opening 21 of the guide member 13 is separated from the lower lip P1 and the upper lip P2, so that the first opening 21 The exhalation is blown in between the lower lip P1 and the upper lip P2. Thus, exhaled air collects in the conversion device 16 through the inside of the main body cylinder 20, the second opening 22 and the flow passage 15. Here, since the main body cylinder 20 has a megaphone shape as described above, the pressure increases as the exhalation collects inside the main body cylinder 20, and the expiratory pressure when passing through the first opening 21 is increased. Large pressure is delivered to the transducer 16. Then, the converter 16 detects the increased pressure and outputs an electrical signal to the control device 30.

  Further, during the performance of the electric wind instrument 10, the position sensors 28, 28 detect the position information of the upper lip P2 and the lower lip P1 and output them to the control device 30. The control device 30 calculates the orientation of the upper lip P2 and the lower lip P1 based on the position information of the upper lip P2 and the lower lip P1, and the pitch required by the player P through a predetermined determination algorithm from the calculation result. Information is obtained.

  Therefore, according to the first embodiment, the orientation of the upper lip P2 and the lower lip P1 can be detected even when the pressure change of the expiration is relatively small, such as a flute performance. Can be easily detected. This makes it possible to easily and stably control the pitch adjustment of the reproduced sound based on the direction of expiration. Further, since the position sensor 28 is disposed in the upper hole 25 and the lower hole 26, it is possible to reduce the radiation emission angle of near infrared rays emitted by the light emitting elements, and to stabilize the sensing in the position sensor 28. It becomes possible.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the following description, the same or equivalent components as those in the first embodiment are denoted by the same reference numerals as necessary, and the description is omitted or simplified.

FIG. 4 shows a second embodiment according to the electric wind instrument 10 of the present invention. In the second embodiment, the orientations of the open portions 25A and 26A of the upper hole 25 and the lower hole 26 are changed with respect to the first embodiment, and the lips P1 and P2 detected by the position sensors 28 and 28 are changed. It is.
That is, the upper hole 25 is provided with the opening 25A directed toward the lower lip P1, and the internal position sensor 28 is provided so that the position of the lower lip P1 can be detected. On the other hand, the opening 26A is directed to the lower lip P2 side of the lower hole 26, and an internal position sensor 28 is provided so that the position of the upper lip P2 can be detected.
According to this, the relative angle between the light emitting directions of the position sensors 28 and 28 is increased, so that it is possible to avoid receiving near infrared rays reflected by the lips between the upper and lower position sensors 28 and 28 due to misplacement. The positions of the lips P1 and the upper lips P2 can be detected more stably.

The best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this.
That is, the present invention has been particularly shown and described with respect to particular embodiments, but is not limited to the embodiments described above without departing from the scope and spirit of the present invention. Various modifications can be made by those skilled in the art in terms of position, orientation, and other detailed configurations.
Therefore, the description limited to the shape disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded one part or all part is included in this invention.

  For example, in the above-described embodiment, a form imitating a flute and a performance method are adopted, but instead of this, a configuration in which a performance can be performed by a wind instrument similar to a wind instrument such as a bass flute, an alto flute, or a piccolo is possible.

  The number of the position sensors 28 can be variously changed. For example, two position sensors 28 for detecting the positions of the lower lip P1 and the upper lip P2 are provided. Or a configuration in which one of the two position sensors 28 is omitted. However, providing at least one position sensor 28 at the top and bottom is advantageous in that it is easier to detect the orientation of the upper and lower lips.

The front view which carried out partial cross-sectional view of the electric wind instrument concerning 1st Embodiment. The partial right view of FIG. The principal part enlarged view of FIG. The front view similar to FIG. 1 of the electric brass instrument which concerns on 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Electric wind instrument, 13 ... Guide member, 16 ... Conversion apparatus, 25 ... Upper hole, 25A ... Opening part, 26 ... Lower hole, 26A ... Opening part, 27 ... cover member, 28 ... position sensor, P ... performer, P1 ... lower lip, P2 ... upper lip

Claims (4)

Input of wind information of an electric wind instrument having a conversion device that detects an exhalation pressure and outputs an electrical signal, and a guide member that guides the exhalation to the conversion device and is arranged away from the lips of the performer Structure,
The guide member is provided with a position sensor capable of detecting the position of the lips.   A plurality of the position sensors are provided, and at least one position sensor is provided so as to be able to detect the position of the upper lip, while at least one other position sensor is provided so as to be able to detect the position of the lower lip. The structure for inputting wind information of an electric wind instrument according to claim 1.   The structure for inputting wind information of an electric wind instrument according to claim 1 or 2, wherein the guide member includes a hole having an opening on the lip side, and the position sensor is provided in the hole.   The structure for inputting wind information of an electric wind instrument according to claim 3, wherein a cover member having an outer surface positioned substantially on the same plane as the guide member forming surface is provided on the opening portion side of the hole. .

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