Electronic wind instrument and exhalation detection method

Abstract

An interval Lc between an opening edge 310a of an upper blowing port 310 and an opening edge 311a of a lower blowing port 311 in the circumferential direction is formed larger than both an opening dimension La of the upper blowing port 310 and an opening dimension Lb of the lower blowing port 311 in the circumferential direction. This configuration restrains breath blown into one of the upper blowing port 310 and the lower blowing port 311 from being introduced into the other. Since the blowing ports 310 and 311 are formed on a bottom face 318a of a recessed part 318, a necessary amount of breath is easily introduced into each of the blowing ports 310 and 311 without being diffused. Thus, exhalation of the player can be accurately detected.

Description

Electronic Wind Instrument and Exhalation Detection Method 【0001】 The present invention relates to an electronic wind instrument and an exhalation detection method, and more particularly to an electronic wind instrument and an exhalation detection method capable of accurately detecting the exhalation of a performer. 【0002】 For example, in Patent Document 1, there is described an electronic wind instrument including two first breath introduction areas 4 and second breath introduction areas 5 arranged in the circumferential direction of a pipe body P, and pressure sensors 8 and 9 for detecting the exhalation blown into these first and second breath introduction areas 4 and 5. According to this electronic wind instrument, based on the pressure difference detected by the pressure sensors 8 and 9, it is possible to detect the blowing angle and strength of the exhalation by the performer. 【0003】 Japanese Patent Application Laid-Open No. 2010-262077 (for example, paragraphs 0009 to 0013, FIGS. 1 to 3) 【0004】 However, in the above-described conventional technology, since the first and second breath introduction areas 4 and 5 are formed adjacent to the outer peripheral surface of the pipe body P, for example, the exhalation that the performer tries to blow into the first breath introduction area 4 is likely to be introduced into the second breath introduction area 5. Since the exhalation introduced into this second breath introduction area 5 may be erroneously detected by the pressure sensor 9, there is a problem that the exhalation of the performer cannot be accurately detected. 【0005】 Further, when the performer blows exhalation into the first and second breath introduction areas 4 and 5 with their lips attached to the outer peripheral surface of the pipe body P (around the first and second breath introduction areas 4 and 5), the amount of exhalation introduced into the first and second breath introduction areas 4 and 5 may become excessive. In this case, the strength of the exhalation may exceed the measurable range of the pressure sensors 8 and 9. Also in this regard, there is a problem that the exhalation of the performer cannot be accurately detected. 【0006】 The present invention has been made to solve the above-described problems, and an object thereof is to provide an electronic wind instrument and an exhalation detection method capable of accurately detecting the exhalation of a performer. 【0007】To achieve this objective, the electronic wind instrument of the present invention comprises a cylindrical housing, a first and second blowing port arranged circumferentially of the housing, a first and second flow path extending into the interior of the housing from each of the first and second blowing ports, and a first and second sensor for detecting exhaled air flowing through each of the first and second flow paths, wherein the circumferential distance between the first and second blowing ports is greater than the circumferential opening dimension of at least one of the first and second blowing ports. 【0008】 The electronic wind instrument of the present invention comprises a cylindrical housing, a first and second blowing port arranged in the circumferential direction of the housing, a first and second flow path extending into the interior of the housing from each of the first and second blowing ports, and a first and second sensor for detecting exhaled air flowing through each of the first and second flow paths, wherein the housing has a recess formed therein, which includes a bottom surface in which the first and second blowing ports are formed, and an inner wall surface rising from the outer edge of the bottom surface, and the opening edges of the first and second blowing ports are formed at a position lower than the upper edge of the inner wall surface of the recess. 【0009】 The present invention provides a method for detecting exhaled breath in an electronic wind instrument, comprising: a cylindrical housing; a first inlet and a second inlet arranged circumferentially in the housing; a first flow path and a second flow path extending into the housing from each of the first and second inlet; and a first sensor and a second sensor for detecting exhaled breath flowing through each of the first and second flow paths, wherein the circumferential distance between the first and second inlet is greater than the circumferential opening dimension of at least one of the first and second inlet, and the exhaled breath blown into the first inlet is detected by the first sensor, and the exhaled breath blown into the second inlet is detected by the second sensor. 【0010】The present invention relates to a method for detecting exhaled breath in an electronic wind instrument, comprising: a cylindrical housing; a first inlet and a second inlet arranged circumferentially of the housing; a first flow path and a second flow path extending into the interior of the housing from each of the first and second inlet; and a first sensor and a second sensor for detecting exhaled breath flowing through each of the first and second flow paths, wherein a recess is formed in the housing, comprising a bottom surface on which the first and second inlet are formed, and an inner wall surface rising from the outer edge of the bottom surface, and the opening edges of the first and second inlet are formed at a position lower than the upper end of the inner wall surface of the recess, wherein the first sensor detects exhaled breath blown into the first inlet, and the second sensor detects exhaled breath blown into the second inlet. 【0011】(a) is a perspective view of the electronic wind instrument of the first embodiment, and (b) is a partially enlarged perspective view of the electronic wind instrument showing the instrument body in a disassembled state. This is an exploded perspective view of the mouthpiece unit. (a) is a perspective view of the lip plate viewed from the inside, and (b) is a partially enlarged cross-sectional view of the mouthpiece unit. This is a partially enlarged cross-sectional view of the mouthpiece unit along the line IV-IV in Figure 3(b). (a) is a partially enlarged cross-sectional view of the mouthpiece unit along the line Va-Va in Figure 4, and (b) is a partially enlarged cross-sectional view of the mouthpiece unit along the line Vb-Vb in Figure 4. This is a partially enlarged cross-sectional view of the electronic wind instrument of the second embodiment. This is an exploded perspective view of the electronic wind instrument of the third embodiment. (a) is a perspective view of the first mounting member viewed from the inside, and (b) is a perspective view of the lip plate viewed from the inside. (a) is a partially enlarged perspective view of an electronic wind instrument, and (b) is a partially enlarged cross-sectional view of the electronic wind instrument along the line IXb-IXb in Figure 9(a). (a) is a partially enlarged perspective view of an electronic wind instrument of the fourth embodiment, and (b) is a partially enlarged cross-sectional view of an electronic wind instrument. (a) is a partially enlarged perspective view of an electronic wind instrument of the fifth embodiment, and (b) is a partially enlarged cross-sectional view of an electronic wind instrument. (a) is a partially enlarged perspective view of an electronic wind instrument of the sixth embodiment, and (b) is a partially enlarged cross-sectional view of an electronic wind instrument. (a) is a partially enlarged perspective view of an electronic wind instrument of the seventh embodiment, and (b) is a partially enlarged cross-sectional view of an electronic wind instrument. (a) is a partially enlarged perspective view of an electronic wind instrument of the eighth embodiment, and (b) is a partially enlarged cross-sectional view of an electronic wind instrument. (a) is a partially enlarged perspective view of the electronic wind instrument of the ninth embodiment, and (b) is a partially enlarged cross-sectional view of the electronic wind instrument. (a) is a partially enlarged perspective view of the electronic wind instrument of the tenth embodiment, and (b) is a partially enlarged cross-sectional view of the electronic wind instrument. This is an exploded perspective view of the electronic wind instrument of the eleventh embodiment. (a) is a perspective view of the second mounting member viewed from the inside, and (b) is a perspective view of the lip plate viewed from the inside. (a) is a partially enlarged perspective view of the electronic wind instrument, and (b) is a partially enlarged cross-sectional view of the electronic wind instrument. This is a perspective view of the first mounting member and the second mounting member in a modified example. 【0012】The following describes preferred embodiments with reference to the attached drawings. First, the overall configuration of the electronic wind instrument 1 of the first embodiment will be described with reference to Figures 1 and 2. Figure 1(a) is a perspective view of the electronic wind instrument 1 of the first embodiment, and Figure 1(b) is a partially enlarged perspective view of the electronic wind instrument 1 showing the instrument body 2 in a disassembled state. Figure 2 is an exploded perspective view of the mouthpiece unit 3. In the following description, the direction perpendicular to the axial direction (longitudinal direction) of the electronic wind instrument 1 will be described as the radial direction, and the direction around the axis will be described as the circumferential direction. 【0013】 As shown in Figure 1, the electronic wind instrument 1 is an electronic instrument that imitates an acoustic wind instrument (in this embodiment, a flute). The electronic wind instrument 1 has an instrument body 2 that imitates the main tube of a flute, and a mouthpiece unit 3 that imitates the head joint is attached to the axial end of the instrument body 2. 【0014】 The instrument body 2 comprises a roughly semi-cylindrical upper housing 21 (first housing) and a lower housing 22 (second housing), with a plurality of control elements 20 attached to the outer circumferential surface of the upper housing 21. A cylindrical projection 210 is integrally formed at the end of the upper housing 21 on the side of the mouthpiece unit 3 in the axial direction. The projection 210 protrudes from the inner circumferential surface of the upper housing 21 toward the lower housing 22, and a through hole 220 for passing a bolt B1 is formed in the lower housing 22 at a position corresponding to the tip of the projection 210. 【0015】 An insertion hole 30 is formed at the end of the mouthpiece unit 3 on the instrument body 2 side in the axial direction for inserting the projection 210 of the upper housing 21, and a bolt hole (fastening hole) (not shown) is formed at the tip of the projection 210 of the upper housing 21. With the projection 210 of the upper housing 21 inserted into the insertion hole 30 of the mouthpiece unit 3, the mouthpiece unit 3 is attached to the instrument body 2 by screwing a bolt B1, which has been passed through the through hole 220, into the projection 210. 【0016】A lip plate 31 is attached to the outer circumferential surface of the mouthpiece unit 3, and an upper mouthpiece 310 (first mouthpiece) and a lower mouthpiece 311 (second mouthpiece) are formed on the lip plate 31, arranged circumferentially. Each of these mouthpieces 310, 311 is a rectangular opening formed horizontally in the axial direction of the mouthpiece unit 3. The electronic wind instrument 1 is played by the performer operating the control device 20 and switching (blowing into) the direction of exhalation into each mouthpiece 310, 311. 【0017】 Electronic components such as a circuit board 23 are housed in the internal space surrounded by the respective casings 21 and 22 of the instrument body 2. A CPU is installed on the circuit board 23, and the sound generation process performed by this CPU generates musical sounds based on the operating state of the control elements 20 and the state (amount of breath) of exhaled air into each of the mouthpieces 310 and 311. 【0018】 As shown in Figure 2, the inlet unit 3 comprises a substantially semi-cylindrical inlet-side housing 32 (third housing) and an exhaust-side housing 33 (fourth housing). Each of these housings 32 and 33 is a resin component having a relatively large diameter portion 320 and 330, and a small diameter portion 321 and 331 formed on one axial end of the large diameter portion 320 and 330, which has a smaller diameter than the large diameter portion 320 and 330. 【0019】 The large-diameter portion 320 and the small-diameter portion 321 of the blowing-side housing 32 are formed integrally, and similarly, the large-diameter portion 330 and the small-diameter portion 331 of the exhaust-side housing 33 are formed integrally. Semi-elliptical notches 321a and 331a are formed at both ends in the circumferential direction of the small-diameter portions 321 and 331 of each housing 32 and 33, respectively, and the aforementioned insertion hole 30 (see Figure 1(b)) is formed by overlapping the housings 32 and 33. 【0020】 A mounting hole 322 for attaching the lip plate 31 is formed in the large-diameter portion 320 of the blowing-side housing 32, and a substrate 34 is sandwiched between the bottom surface 322a of the mounting hole 322 and the lip plate 31. This substrate 34 is for heating the lip plate 31 to remove moisture, and the details of the heating configuration will be described later. 【0021】A boss 332 for fixing the lip plate 31 is integrally formed on the inner circumferential surface of the large-diameter portion 330 of the exhaust-side housing 33. The boss 332 is a cylindrical projection that rises from the inner circumferential surface of the large-diameter portion 330 towards the blow-in-side housing 32. An insertion hole 332a for inserting a bolt B2 is formed in the center of the boss 332, and a similar insertion hole 340 is also formed in the base plate 34 (bottom surface 322a of the mounting hole 322). By screwing the bolt B2 inserted into the respective insertion holes 332a and 340 of the boss 332 and base plate 34 into the bolt hole 312 (see Figure 3) of the lip plate 31, the lip plate 31 is fixed to the mounting hole 322 (outer circumferential surface) of the blow-in-side housing 32. 【0022】 A housing-side flow path 323 is formed at the bottom surface 322a of the mounting hole 322 for passing exhaled air blown in from each of the inlet ports 310 and 311. The housing-side flow paths 323 are formed in pairs, spaced apart in the axial direction of the blowing-side housing 32 (inlet unit 3). The exhaled air that has passed through this pair of housing-side flow paths 323 is introduced into a pair of sensor modules Sa and Sb. 【0023】 The pair of sensor modules Sa and Sb are arranged symmetrically with respect to a plane perpendicular to the axial direction of the inlet unit 3 (the plane containing each inlet 310, 311) as the plane of symmetry (hereinafter, this same symmetry will simply be referred to as "symmetry"). Sensor module Sa detects exhaled air blown into the upper inlet 310, and sensor module Sb detects exhaled air blown into the lower inlet 311. Sensor modules Sa and Sb are identical components and each comprises a resin case 35 and a substrate 36 attached to the case 35 by adhesive or the like. 【0024】 Each case 35 of the sensor modules Sa and Sb has a cylindrical section 350 through which exhaled air blown in from the respective inlets 310 and 311 passes. The exhaled air that has passed through this cylindrical section 350 is detected by a temperature sensor 360 (see Figure 4) provided on the substrate 36. Details of this exhaled air detection method will be described later. 【0025】Bosses 333 for fixing a pair of sensor modules Sa and Sb are integrally formed on the inner circumferential surfaces at both axial ends of the exhaust side housing 33. The bosses 333 are cylindrical projections that rise towards the inlet side housing 32, and an insertion hole 333a for passing a bolt B3 is formed in the center of the bosses 333. 【0026】 Similar insertion holes 361 are also formed at the end of the substrate 36 opposite to the cylindrical portion 350 in the axial direction, and bolt holes 324 (see Figure 4) are formed on the inner circumferential surface of the blowing-side housing 32 at positions corresponding to the boss 333 (insertion hole 333a). By screwing the bolts B3 inserted into the boss 333 and the respective insertion holes 333a and 361 of the substrate 36 into the bolt holes 324 of the blowing-side housing 32, the sensor modules Sa and Sb are fixed inside the blowing-out port unit 3. 【0027】 In this fixed state, the cylindrical portions 350 of the sensor modules Sa and Sb are in communication with the first exhaust ports 334 of the exhaust-side housing 33. The first exhaust ports 334 are provided in pairs, spaced apart in the axial direction (with a boss 332 in between), and the exhaled air blown into each of the inlet ports 310 and 311 is mainly discharged from these first exhaust ports 334. A pair of second exhaust ports 335 are formed on both sides of the axial direction of this pair of first exhaust ports 334. Each of these exhaust ports 334 and 335 is a hole that penetrates the large-diameter portion 330 of the exhaust-side housing 333, with the first exhaust ports 334 being circular in shape and the second exhaust ports 335 being rectangular in shape that is elongated in the axial direction. 【0028】 Each exhaust port 334, 335 is covered by an axially extending decorative body 37 (covering member). The decorative body 37 includes a first covering portion 370 that covers the first exhaust port 334, and a through hole 370a is formed in the first covering portion 370 at a position corresponding to the first exhaust port 334. On both axial sides of the first covering portion 370, a pair of second covering portions 371 are provided to cover a pair of second exhaust ports 335, and on both axial sides of this pair of second covering portions 371, a pair of third covering portions 372 are provided. 【0029】The third covering portion 372 is the part that covers the recess 333b (see Figure 4) formed on the outer circumferential surface of the exhaust side housing 33 by the boss 333, and a through hole 372a is formed in the third covering portion 372 at a position corresponding to the recess 333b. A pair of fixed parts 373 are provided on both axial sides of the pair of third covering portions 372, and this pair of fixed parts 373 are fixed to the outer circumferential surface of the exhaust side housing 33 (large diameter portion 330) by bolts (not shown). 【0030】 The parts 370 to 373 that make up these decorative elements 37 are integrally formed using a resin material. By covering the exhaust ports 334, 335 and recesses 333b (see Figure 4) with the parts 370 to 373 of the decorative elements 37, the appearance of the electronic wind instrument 1 can be improved. 【0031】 Next, with reference to Figures 2 and 3, the airflow path from each of the inlet 310 and 311 to the pair of housing-side flow paths 323 will be described. Figure 3(a) is a perspective view of the lip plate 31 seen from the inside, and Figure 3(b) is a partially enlarged cross-sectional view of the inlet unit 3 (electronic wind instrument 1). Figure 3(b) shows a cross-section cut by a plane that is perpendicular to the direction in which the performer blows air into the inlet 310 and 311 (the radial direction of the inlet-side housing 32) and includes the partition wall 313 of the lip plate 31. 【0032】 Note that Figure 3(b) is a cross-sectional view that does not include the inlets 310, 311 or the constriction walls 317a, 317b (see Figure 3(a)), but in Figure 3(b), the positions where the inlets 310, 311 are formed are shown with dashed lines. Furthermore, in the following explanation, the side with the inlets 310, 311 will be referred to as the upstream side of the exhalation flow path, and the opposite side as the downstream side. 【0033】 As shown in Figures 2 and 3, a partition wall 313 is integrally formed on the inner surface of the lip plate 31 to demarcate the exhalation flow path. The partition wall 313 is formed in the shape of a wall rising from the inner surface of the lip plate 31, and the tip of this partition wall 313 (the end on the far side in the plane of the paper in Figure 3(b)) is configured to be in contact with the substrate 34. The space surrounded by this partition wall 313 and the substrate 34 forms the first bent flow paths 314a, 314b and the second bent flow paths 315a, 315b. 【0034】 The first bent passage 314a is a passage that extends linearly from the upper inlet 310 to one axial side of the inlet housing 32 (the left side in Figure 3(b)). From the downstream end of the first bent passage 314a (the left side in Figure 3(b)), the second bent passage 315a bends vertically (in the circumferential direction of the inlet housing 32), and the downstream portion of this second bent passage 315a is connected to one of the pair of housing-side passages 323. 【0035】 The first bent passage 314b is a passage that extends linearly from the lower inlet 311 to the other axial side of the inlet housing 32 (the right side in Figure 3(b)). From the downstream end of the first bent passage 314b (the right side in Figure 3(b)), the second bent passage 315b bends vertically (in the circumferential direction of the inlet housing 32 and in the same direction as the second bent passage 315a), and the downstream portion of this second bent passage 315b is connected to the other housing-side passage 323. 【0036】 Furthermore, a diaphragm channel 316a (see Figure 3(a)) is formed at the boundary between the first bent channel 314a and the second bent channel 315a, and a diaphragm channel 316b is also formed at the boundary between the first bent channel 314b and the second bent channel 315b. These diaphragm channels 316a and 316b are formed by diaphragm walls 317a and 317b that connect the walls of the partition wall 313. 【0037】 The constricted walls 317a and 317b are walls that extend across each of the bent channels 314a, 314b, 315a, and 315b, and the height at which the constricted walls 317a and 317b are erected from the inner surface of the lip plate 31 is lower than the height at which the partition wall 313 is erected. The formation of these constricted walls 317a and 317b results in the formation of constricted channels 316a and 316b, which have a smaller channel cross-sectional area than each of the bent channels 314a, 314b, 315a, and 315b. 【0038】 As indicated by arrow A in Figure 3, exhaled air blown in from the upper inlet 310 is introduced into one of the housing-side flow paths 323 through the first bent flow path 314a, the throttling flow path 316a, and the second bent flow path 315a. On the other hand, as indicated by arrow B, exhaled air blown in from the lower inlet 311 is introduced into the other housing-side flow path 323 through the first bent flow path 314b, the throttling flow path 316b, and the second bent flow path 315b. 【0039】 Next, with reference to Figures 3 and 4, the exhaled air flow path from the housing-side flow path 323 to the first exhaust port 334 will be described. Figure 4 is a partially enlarged cross-sectional view of the inlet unit 3 along the line IV-IV in Figure 3. Note that the flow paths downstream of the housing-side flow path 323 are formed symmetrically on the sensor module Sa side and the sensor module Sb side. Therefore, in the following description, the exhaled air flow path on the sensor module Sa side (see Figure 4) will be described, and the description of the flow path on the sensor module Sb side will be omitted. 【0040】 As shown in Figures 3 and 4, a cylindrical lower projection 325 (see Figure 4) is integrally formed on the inner circumferential surface of the blowing side housing 32, opposite to the bottom surface 322a of the mounting hole 322. A throttling channel 326 connected to the housing side channel 323 is formed on the inner circumferential side of the lower projection 325, and the cases 35 of the sensor modules Sa and Sb are attached to the lower projection 325. 【0041】 The case 35 comprises the cylindrical portion 350 described above, a bottom wall portion 351 extending from the cylindrical portion 350 to one axial side of the inlet unit 3 (left side in Figure 4), and a side wall portion 352 and an end wall portion 353 rising from the bottom wall portion 351, with each of these portions 350 to 353 being integrally formed. On the inner circumference of the cylindrical portion 350, there is a fitting hole 354 into which the lower projection 325 is fitted, and a case-side flow path 355 connected to the fitting hole 354. 【0042】 The fitting hole 354 and the case-side flow path 355 are each formed with a circular cross-section. The inner diameter of the case-side flow path 355 is formed to be smaller than the inner diameter of the fitting hole 354, creating a step on the inner circumference of the cylindrical portion 350, into which the lower projection 325 is fitted. 【0043】 When the cylindrical portion 350 is attached to the lower projection 325, a flow path is formed that extends radially (approximately parallel to the direction in which exhaled air is blown into each of the inlet openings 310 and 311) by the housing-side flow path 323, the throttling flow path 326, and the case-side flow path 355. 【0044】The exhaled air blown into the upper inlet 310 (see FIG. 3) is exhausted from the first exhaust port 334 through the respective bending channels 314a, 315a (for the first bending channel 314a, see FIG. 3), the housing-side channel 323, the throttle channel 326, and the case-side channel 355 described above. Hereinafter, these channels 314a, 315a, 323, 326, 355 will be collectively described as the "main channel" of the exhaled air for explanation. 【0045】 The bottom wall portion 351 of the case 35 is formed in a flat plate shape extending in the axial direction of the inlet unit 3, and the side wall portions 352 are formed in a pair on both ends in the width direction of the bottom wall portion 351 (the direction perpendicular to the paper surface of FIG. 4) (see FIG. 5(b)). The end wall portion 353 is formed in a wall shape rising from the axial end of the bottom wall portion 351 (the end opposite to the cylindrical portion 350 side), and these wall portions 351 to 353 are formed in a box shape with one side (the blowing side housing 32 side) open. By closing this open portion with the substrate 36, a branch channel 356 surrounded by the substrate 36 and the wall portions 351 to 353 is formed in the case 35. 【0046】 The branch channel 356 is a channel extending in the axial direction of the inlet unit 3. In order to connect one end thereof to the main channel (the case-side channel 355), an opening 356a (the first opening) of the branch channel 356 is formed on the inner peripheral surface of the case-side channel 355. That is, the branch channel 356 branches so as to intersect the case-side channel 355. The other end of the branch channel 356 is connected to the outside of the case 35 through an opening 356b (the second opening) formed in the end wall portion 353. 【0047】 On the inner surface of the substrate 36 facing the branch channel 356, a temperature sensor 360 and a heater 362 are provided side by side in the axial direction (the longitudinal direction of the branch channel 356). The temperature sensor 360 can use a known temperature sensor composed of a thermistor or the like, and the heater 362 can use a known heating element such as a chip resistor, so detailed description is omitted. 【0048】The air in the branch channel 356 is heated by the heater 362, and the flow of the heated air (temperature change in the branch channel 356) is detected by the temperature sensor 360. When the case-side channel 355 side is the upstream side of the branch channel 356, in this embodiment, the temperature sensor 360 is arranged on the upstream side of the heater 362, but the temperature sensor 360 may be arranged on the downstream side of the heater 362. Further, the temperature sensor 360 and the heater 362 may be arranged side by side in the width direction (perpendicular to the plane of the drawing in FIG. 4) orthogonal to the longitudinal direction (left-right direction in FIG. 4) of the branch channel 356. 【0049】 When the flow rate (flow velocity) of the exhaled breath flowing in the main channel (case-side channel 355) changes, the airflow in the branch channel 356 (sub-channel branched from the main channel) also changes, and this change in the airflow in the branch channel 356 (temperature change due to the flow of the air heated by the heater 362) is detected by the temperature sensor 360. A musical sound signal based on the detection result of this temperature sensor 360 is generated by the sound source, and an electronic sound based on the musical sound signal is emitted from an amplifier and a speaker (both not shown). 【0050】 In order to accurately detect the flow rate of the exhaled breath flowing in the main channel based on such a change in the airflow in the branch channel 356 by the temperature sensor 360, it is necessary to prevent saliva contained in the exhaled breath and moisture generated by condensation of the moisture contained in the exhaled breath from remaining in the main channel or the branch channel 356. In particular, when such moisture adheres to the temperature sensor 360, it becomes difficult to accurately detect the exhaled breath of the performer. A configuration for solving these problems will be described below. 【0051】 The case-side channel 355 and the opening 356a of the branch channel 356 are each formed in a circular cross-section, but the diameter of the opening 356a of the branch channel 356 is formed smaller than the diameter of the case-side channel 355. That is, the cross-sectional area of the opening 356a of the branch channel 356 is formed smaller than the cross-sectional area of the portion (case-side channel 355) of the main channel to which the opening 356a of the branch channel 356 is connected. Thereby, an effect is obtained that it becomes difficult for the exhaled breath containing moisture to flow into the side of the temperature sensor 360 arranged in the branch channel 356. 【0052】One possible reason for this is that the opening 356a of the branched passage 356 is formed to be relatively small, making it difficult for exhaled air passing through the case-side passage 355 to flow into the branched passage 356. Another possible reason is that the exhaled air passing through the case-side passage 355 creates negative pressure in the branched passage 356, and this negative pressure draws the air in the branched passage 356 through the opening 356a into the case-side passage 355. 【0053】 By suppressing the inflow of humid exhaled air into the branch channel 356, moisture generated by condensation or other factors can be prevented from adhering to the temperature sensor 360. Therefore, the flow rate (flow velocity) of exhaled air flowing in the main channel can be accurately detected by the temperature sensor 360 based on changes in the airflow within the branch channel 356. 【0054】 Furthermore, a cylindrical projection 357 is integrally formed on the inner circumferential surface of the case-side flow path 355, the tip of which becomes the opening 356a of the branched flow path 356. By causing the opening 356a of the branched flow path 356 to protrude towards the inner circumferential side of the case-side flow path 355 with this projection 357, it is thought that the effects of making it difficult for humid exhaled air to flow into the branched flow path 356 and of making it easier for negative pressure to be generated in the branched flow path 356 by the exhaled air passing through the main flow path can be obtained. 【0055】 Furthermore, the tip of the projection 357 (the edge of the opening 356a of the branched passage 356) is positioned on the extension of the flow path of the throttling passage 326. That is, in a view of the direction of exhaled air inflow from the throttling passage 326 to the case-side passage 355 (up and down view in Figure 4), the throttling passage 326 and the tip of the projection 357 are positioned to overlap. This is also thought to have the effect of making it easier for negative pressure to be generated in the branched passage 356 by the exhaled air passing through the main passage. 【0056】Thus, this embodiment is a structure in which exhaled air flowing into the branch channel 356 from an opening 356a with a relatively small cross-sectional area is detected by a temperature sensor 360, or a structure in which negative pressure is generated in the branch channel 356 by exhaled air passing through the case-side channel 355, and the airflow in the branch channel 356 caused by this negative pressure is detected by the temperature sensor 360. In such a structure, the change in airflow in the branch channel 356 becomes relatively small. Here, in this embodiment, if the temperature sensor 360 detects the temperature change of the air in the branch channel 356 heated by the heater 362, even slight changes in airflow in the branch channel 356 can be detected by the temperature sensor 360. Therefore, the flow rate of exhaled air flowing in the main channel can be detected with high accuracy. 【0057】 Furthermore, since the sensor modules Sa and Sb are arranged axially so that their cylindrical sections 350 face each other (see Figure 2), and the branched flow path 356 is formed along the axial direction (longitudinal direction) of the inlet unit 3, a long branched flow path 356 for sensing exhaled breath can be formed. This makes it possible to bring each cylindrical section 350 close to the lip plate 31 and to mimic the appearance of a long, slender flute (head joint) with the inlet unit 3, while the temperature sensor 360 can accurately detect changes in the airflow within the branched flow path 356. 【0058】 Furthermore, in this embodiment, the exhaled air blown into the upper inlet 310 and the exhaled air blown into the lower inlet 311 are detected by separate sensor modules Sa and Sb (see Figure 2). That is, instead of forming two branched flow channels 356 in one case 35, the two cases 35 are made into separate parts (the cases 35 are made smaller) and the branched flow channels 356 are formed individually, so the shape of the branched flow channels 356 can be formed with high precision. Therefore, the airflow in the branched flow channels 356 can be detected with high precision by the temperature sensor 360. 【0059】As described above, in this embodiment, exhaled breath is detected based on the airflow in the branched channel 356, and a tapered surface 356c is formed in the branched channel 356 to stabilize this airflow. The tapered surface 356c is an inclined surface that is connected to one end (the end on the opening 356a side) of the inner surface of the bottom wall portion 351 or the side wall portion 352 of the case 35 (see Figure 5(b) for the point where the tapered surface 356c is connected to the side wall portion 352). By forming such a tapered surface 356c, the cross-sectional area of ​​the branched channel 356 can be made to gradually decrease toward the opening 356a side. This suppresses the occurrence of irregular airflow (turbulence) in the branched channel 356, so that the flow rate of exhaled breath flowing in the main channel can be accurately detected by the temperature sensor 360. 【0060】 Furthermore, a vent 333c is formed on the side surface of the boss 333 facing the end wall portion 353 of the case 35, and the recess 333b formed on the outer circumferential surface of the exhaust-side housing 33 by the boss 333 and the opening 356b of the branched passage 356 are connected via the vent 333c. As a result, the inside of the branched passage 356 can be ventilated by the airflow passing through the vent 333c and the opening 356b, thereby suppressing condensation on the temperature sensor 360. 【0061】 Furthermore, by utilizing the boss 333 (recess 333b) for fixing the sensor modules Sa and Sb to ventilate the branched channel 356, it becomes unnecessary to separately provide holes or recesses in the exhaust-side housing 33 for such ventilation. Therefore, the number of holes and recesses formed in the exhaust-side housing 33 can be reduced, thereby improving the appearance of the electronic wind instrument 1. 【0062】 Here, for example, when the performer takes a breath while playing, air may be drawn in from the upper mouthpiece 310 (see Figure 3). Also, for example, if the performer performs an action with their mouth away from the upper mouthpiece 310, outside air may flow in from the upper mouthpiece 310 due to the movement of the electronic wind instrument 1. When the temperature sensor 360 detects such airflow due to intake or inflow of outside air, a problem arises in which unintended musical tones are generated. 【0063】Furthermore, when a performer forcefully blows air into the upper inlet 310, the airflow rate may exceed the measurable range of the temperature sensor 360. Outside this range, changing the airflow rate does not affect the generated musical tone, making it difficult to produce the musical tone intended by the performer. 【0064】 In contrast, in this embodiment, as described above, the lip plate 31 has a first bent passage 314a (see Figure 3) that extends in a direction perpendicular to the direction in which exhaled air is blown into the upper inlet 310 (in this embodiment, in the axial direction of the inlet unit 3). Furthermore, the second bent passage 315a, which is connected downstream of the first bent passage 314a, extends in a direction that bends further from the connection point (in this embodiment, in a direction perpendicular to the direction in which exhaled air is blown and the axial direction of the inlet unit 3). 【0065】 By forming such a curved channel upstream of the main channel, for example, compared to the case where the upper inlet 310 and the housing-side channel 323 are connected in a straight line, it is possible to suppress the generation of airflow in the case-side channel 355 even when the performer inhales air or outside air flows in as described above. 【0066】 Furthermore, at the boundary portions of each of these bent passages 314a and 315a, a constricted passage 316a (see Figure 3(a)) is formed, which has a smaller cross-sectional area than each of the bent passages 314a and 315a. In addition, a constricted passage 326 is formed between the housing-side passage 323 and the case-side passage 355, which has a smaller cross-sectional area than each of the respective passages 323 and 355. By providing such a constricted portion, which partially reduces the cross-sectional area of ​​the main passage, in the middle of the main passage (upstream of the connection portion of the branch passage 356), it is possible to suppress the generation of airflow in the case-side passage 355 due to the performer's inhalation and the inflow of outside air as described above. 【0067】 By suppressing the airflow generated in the case-side passage 355 due to the performer's inhalation and the inflow of outside air, it is possible to prevent the temperature sensor 360 from falsely detecting that airflow. Therefore, it is possible to prevent the generation of musical sounds that the performer did not intend. 【0068】Furthermore, by adjusting the flow path length of each bent flow path 314a, 315a and the flow path cross-sectional area of ​​the constricted flow paths 316a, 326, it is possible to suppress the exhaled air that the performer forcefully blows into the upper inlet 310 from exceeding the measurable range of the temperature sensor 360. As a result, the musical tone intended by the performer is more easily generated. 【0069】 Thus, while providing bends and constrictions in the main channel makes it easier to generate the musical tones intended by the performer, a complex path in the main channel makes it easier for saliva contained in exhaled breath and moisture generated by condensation to remain in the main channel. If this moisture blocks, for example, the opening 356a of the constricted channel 326 or the branched channel 356, it becomes difficult for the temperature sensor 360 to detect the exhaled breath blown in from each of the inlets 310 and 311. 【0070】 Therefore, in this embodiment, a configuration is adopted in which moisture is dried by heating the upstream portion of the main channel with the substrate 34. Furthermore, this configuration also has the effect of preventing condensation from occurring in the main channel. This effect of preventing condensation is that it prevents the water vapor contained in the air from liquefying, and is a different action from drying the moisture. That is, the higher the temperature, the larger the saturated water vapor amount (the mass of water vapor that can exist in a unit volume of air), so by heating the upstream portion of the main channel, it is possible not only to dry the moisture but also to prevent condensation from occurring. This configuration will be explained with reference to Figures 4 and 5. 【0071】 Figure 5(a) is a cross-sectional view of the nozzle unit 3 along the line Va-Va in Figure 4, and Figure 5(b) is a cross-sectional view of the nozzle unit 3 along the line Vb-Vb in Figure 4. 【0072】 As shown in Figures 4 and 5, the substrate 34 is provided with a heater 341 and a sensor 342 (see Figure 5(a) for both). The heater 341 can use a known heat-generating element such as a chip resistor, and the sensor 342 can use a known temperature sensor such as a thermistor, so a detailed explanation is omitted. 【0073】The temperature of the substrate 34, as a result of heating by the heater 341, is detected by the sensor 342, and the heater 341 is controlled to repeatedly turn on and off (or the temperature of the heater 341 changes) based on the detection result of the sensor 342. This control of the heater 341 ensures that the temperature of the substrate 34 is maintained at around 30°C to 35°C. 【0074】 By heating the substrate 34 that constitutes the bottom surface of each bent channel 314a, 315a with the heater 341, saliva adhering to each bent channel 314a, 315a can be dried, and the generation of moisture due to condensation in each bent channel 314a, 315a can be suppressed. 【0075】 Furthermore, by heating the substrate 34 with the heater 341, the housing-side flow path 323 connected to the second bent flow path 315a and the throttling flow path 326 located downstream of the housing-side flow path 323 can also be heated. Therefore, saliva adhering to the housing-side flow path 323 and the throttling flow path 326 can be dried, and the generation of moisture due to condensation in the housing-side flow path 323 and the throttling flow path 326 can be suppressed. 【0076】 By preventing moisture from accumulating in the main channel upstream of the throttling channel 326 and the opening 356a of the branch channel 356 (see Figure 4), it is possible to prevent that moisture from flowing downstream of the main channel along with the exhaled breath. As a result, the throttling channel 326 and the opening 356a of the branch channel 356 are prevented from being blocked by moisture, allowing the exhaled breath flowing in the main channel to be accurately detected by the temperature sensor 360 (see Figure 4). 【0077】 In this embodiment, the exhaled air flowing through the main channel is mainly exhausted from the first exhaust port 334, but a portion of the exhaled air is introduced into the internal space S1 of each housing 32, 33 through the leak channel 322b (see Figure 5(a)). 【0078】More specifically, the housing-side flow path 323 opens in the middle of the second bent flow path 315a, and a leak flow path 322b (see Figure 5(a)) is formed in the mounting hole 322 to which the lip plate 31 is attached, connecting the downstream end of the second bent flow path 315a to the internal space S1 side of each housing 32, 33. This leak flow path 322b is formed by the gap between the edge of the substrate 34 in the circumferential direction of the blowing-side housing 32 and the inner circumferential surface of the blowing-side housing 32. 【0079】 By forming a leak channel 322b that branches off from the main channel, a portion of the airflow generated in the second bent channel 315a can be introduced into the internal space S1 of the inlet unit 3 (i.e., a portion of the airflow can be discharged to the outside of the main channel). This suppresses the generation of airflow in the case-side channel 355 due to the performer's inhalation and the inflow of outside air, thus preventing the temperature sensor 360 (see Figure 4) from falsely detecting this airflow. Therefore, it is possible to suppress the generation of musical sounds that the performer did not intend. 【0080】 Furthermore, by adjusting the cross-sectional area of ​​the leak channel 322b, it is possible to suppress the exhaled air blown forcefully into the upper inlet 310 by the performer from exceeding the measurable range of the temperature sensor 360. As a result, the musical tone intended by the performer is more easily generated. 【0081】 Exhaled air flowing into the internal space S1 of each housing 32, 33 from the leak passage 322b is exhausted from the second exhaust port 335 (see Figure 5(b)) which penetrates the exhaust-side housing 33. The second covering portion 371 of the decorative body 37 that covers the second exhaust port 335 is formed to be installed between the first covering portion 370 and the third covering portion 372 (extending in the axial direction) (see Figure 4), and a cavity S2 (see Figure 5(b)) is formed between the exhaust-side housing 33 (second exhaust port 335) and the second covering portion 371. 【0082】As a result, even when the electronic wind instrument 1 is placed on a table or the like, the second exhaust port 335 is prevented from being blocked by the placement surface, and ventilation through the cavity S2 and the second exhaust port 335 is ensured. Therefore, even with a structure that allows some of the exhaled air to leak into the internal space S1 of each housing 32, 33 through the leak passage 322b (see Figure 5(a)), condensation on the components of each housing 32, 33 (for example, the substrate 36 shown in Figure 5(b)) can be prevented. 【0083】 Furthermore, a pair of inclined surfaces 371a (see Figure 5(b)) are formed on the inner circumferential surface of the second covering portion 371 facing the second exhaust port 335, and these surfaces are aligned in the circumferential direction. The pair of inclined surfaces 371a are planes that slope away from the exhaust side housing 33 (second exhaust port 335) from their central vertices (intersecting ridges) to their outer ends in the circumferential direction. By forming such mountain-shaped inclined surfaces 371a, the flow velocity of air passing through the cavity S2 along the circumferential direction (left-right direction in Figure 5(b)) is increased by the inclined surfaces 371a. This increase in air flow velocity creates negative pressure in the internal space S1 of each housing 32, 33, and this negative pressure allows the air in the internal space S1 to be exhausted to the outside through the second exhaust port 335. 【0084】 Furthermore, since the circumferential opening size of the second exhaust port 335 gradually increases from the internal space S1 to the outer surface of the exhaust-side housing 33, the airflow passing through the cavity S2 makes it easier for the air in the internal space S1 to be exhausted to the outside through the second exhaust port 335. As a result, even with a structure that leaks a portion of the exhaled air into the internal space S1 of each housing 32, 33 through the leak passage 322b (see Figure 5(a)), condensation on the components of each housing 32, 33 can be suppressed. 【0085】 As described above, through holes 370a and 372a (see Figure 4 for through hole 372a) are formed in the covering portions 370 and 372 of the decorative body 37 that covers the first exhaust port 334 and the recess 333b (vent 333c) of the boss 333 (see Figure 4). For example, recesses 370b are formed on both circumferential edges of the through hole 370a. Similarly, recesses 372b are formed on the edge of the through hole 372a shown in Figure 4. 【0086】By forming such recesses 370b and 372b in the through holes 370a and 372a, it is possible to prevent the first exhaust port 334 and the recesses 333b (ventilation port 333c) from being blocked by the mounting surface, even when the electronic wind instrument 1 is placed on a table or the like. Therefore, ventilation through the first exhaust port 334 and the recesses 333b (ventilation port 333c) can be ensured. 【0087】 Next, with reference to Figure 6, the electronic wind instrument 201 of the second embodiment will be described. In the first embodiment, the case in which the temperature change of the air in the branched channel 356 heated by the heater 362 is detected by the temperature sensor 360 was described, but in the second embodiment, the case in which the change in airflow (atmospheric pressure) in the branched channel 380 is detected using the pressure sensor 363 will be described. In the first embodiment described above and in each embodiment described below, the same parts are denoted by the same reference numerals and their descriptions are omitted. 【0088】 As shown in Figure 6, the sensor module Sa of the electronic wind instrument 201 in the second embodiment is provided with a pressure sensor 363 in place of the temperature sensor 360 and heater 362 (see Figure 4) described in the first embodiment, and cylindrical conduits 38 are provided in place of the walls 351 to 353 (see Figure 4) of the case 35. The pressure sensor 363 is a sensor that detects changes in atmospheric pressure, and a known configuration can be used, so a detailed explanation is omitted. 【0089】 The pressure sensor 363 is mounted on the upper surface of the substrate 36, and a cylindrical connection port 363a is formed in the pressure sensor 363. One end of the conduit 38 is connected to the connection port 363a, and the other end of the conduit 38 is connected to the cylindrical portion 350 of the case 35. The conduit 38 may be formed integrally with the case 35 (cylindrical portion 350), or it may be a separate tube (for example, a flexible tube) from the case 35. 【0090】The cavity inside the conduit 38 is configured as a branched passage 380, and the opening 380a of this branched passage 380 is formed on the inner circumferential surface of the cylindrical portion 350 (case-side passage 355). That is, in this embodiment as well, the branched passage 380 branches off so as to intersect with the case-side passage 355. When the flow rate (flow velocity) of exhaled air flowing in the main passage (case-side passage 355) changes, a change also occurs in the airflow generated in the branched passage 380 (a secondary passage branching off from the main passage), and this change in airflow (atmospheric pressure) in the branched passage 380 is detected by the pressure sensor 363. 【0091】 In this embodiment as well, the cross-sectional area of ​​the opening 380a of the branch channel 380 is formed to be smaller than the cross-sectional area of ​​the part of the main flow channel to which the opening 380a of the branch channel 380 is connected (case-side flow channel 355). This has the effect of making it difficult for moisture-containing exhaled air to flow into the pressure sensor 363 side. Possible reasons for this effect include the fact that exhaled air passing through the case-side flow channel 355 is less likely to flow into the branch channel 380 side, and that exhaled air passing through the case-side flow channel 355 creates negative pressure in the branch channel 380, which in turn draws the air in the branch channel 380 into the case-side flow channel 355 through the opening 380a. 【0092】 Next, the electronic wind instrument 301 of the third embodiment will be described with reference to Figures 7 to 9. In the first embodiment, the case in which the upper blowing port 310 and the lower blowing port 311 are formed adjacent to each other in the circumferential direction was described, but in the third embodiment, the case in which the distance between the upper blowing port 310 and the lower blowing port 311 is formed to be wider than in the first embodiment will be described. 【0093】 Figure 7 is an exploded perspective view of the electronic wind instrument 301 of the third embodiment, Figure 8(a) is a perspective view of the first mounting member 39 viewed from the inside, and Figure 8(b) is a perspective view of the lip plate 331 viewed from the inside. Figure 9(a) is a partially enlarged perspective view of the electronic wind instrument 301, and Figure 9(b) is a partially enlarged cross-sectional view of the electronic wind instrument 301 along the line IXb-IXb in Figure 9(a). In Figure 9(b), the cross-section is shown, which is a plane including each of the blowing holes 310, 311 and is cut by a plane perpendicular to the axial direction of each of the housings 32, 33 (the same applies to the cross-sectional views of other embodiments described later). 【0094】As shown in Figures 7 and 8, the mounting hole 322 of the electronic wind instrument 301 of the third embodiment has a protrusion 322c (see Figure 7) that protrudes from the inner circumferential surface of the mounting hole 322. The protrusion 322c is formed in an annular shape that is continuous in the circumferential direction along the inner circumferential surface of the mounting hole 322, and the outer edge of the disc (elliptical) shaped first mounting member 39 is hooked onto the protrusion 322c. When the first mounting member 39 is hooked onto the protrusion 322c (see Figure 9(b) for this state), the bottom surface of the mounting hole 322 is formed by the surface (outer surface, hereinafter the same) of the first mounting member 39. 【0095】 The first mounting member 39 is formed from rubber or elastomer, and a cylindrical tube portion 391 is integrally formed on the inner surface 390 (see Figure 8(a)) of the first mounting member 39. The tube portions 391 are formed in pairs, aligned in the axial direction, and when the pair of tube portions 391 are inserted into the fitting holes 354 of the left and right cases 35 (see Figure 7), the inner circumference of the tube portion 391 becomes a housing-side flow path 323 that connects to the case-side flow path 355. 【0096】 An insertion hole 392 is formed in the center of the first mounting member 39, and the bolt B2 inserted from the inside into the boss 332 and the insertion holes 332a and 392 of the first mounting member 39 is screwed into the bolt hole 312 of the lip plate 331 (see Figure 8(b)), thereby attaching the lip plate 331 to the mounting hole 322 (outer surface of the blowing side housing 32). In this mounting state, the first mounting member 39 is sandwiched between the protrusion 322c of the mounting hole 322 and the partition wall 313 of the lip plate 331. 【0097】 Furthermore, when the lip plate 331 is installed, the partition wall 313 comes into contact with the surface of the first mounting member 39 which constitutes the bottom surface of the mounting hole 322, thereby forming the bent passages 314a, 315a, 314b, and 315b (see Figure 8(b)) surrounded by the first mounting member 39 and the partition wall 313. The first bent passage 314a is a passage that extends linearly from the upper inlet 310 in one axial direction (to the right in Figure 8(b)). 【0098】From the downstream end of the first bent channel 314a (right side in Figure 8(b)), the second bent channel 315a curves smoothly (to one side in the circumferential direction) so as to approach the lower inlet 311. One of the pair of housing-side channels 323 is connected to the downstream end of this second bent channel 315a (lower side in Figure 8(b)). 【0099】 The first bent passage 314b is a passage that extends linearly from the lower inlet 311 to the other side in the axial direction (left side in Figure 8(b)). From the downstream end of the first bent passage 314b (left side in Figure 8(b)), the second bent passage 315b curves smoothly (to the other side in the circumferential direction) so as to approach the upper inlet 310, and the other of the pair of housing-side passages 323 is connected to the downstream end of this second bent passage 315b (upper side in Figure 8(b)). 【0100】 In the first embodiment, a leak channel 322b (see Figure 5(a)) was described in which the downstream ends of the second bent channels 315a and 315b are connected to the internal space S1 side of each housing 32 and 33. However, in this embodiment, the downstream ends of the second bent channels 315a and 315b are closed off by a partition wall 313. That is, each bent channel 314a, 314b, 315a, and 315b is entirely surrounded by a partition wall 313. 【0101】 As described above, in this embodiment, the partition wall 313 is pressed against the bottom surface of the mounting hole 322 (first mounting member 39) to form the bent passages 314a, 314b, 315a, and 315b (first and second passages), and the lip plate 331, which is equipped with the inlet ports 310, 311 and the partition wall 313, can be attached to and detached from the mounting hole 322 of the inlet housing 32. This makes it easy to perform maintenance (such as cleaning) on ​​the inlet ports 310, 311 and the bent passages 314a, 314b, 315a, and 315b. 【0102】Furthermore, while the first embodiment (see Figure 3) described a case where there is only one partition wall 313 separating the first bent passages 314a and 314b, in this embodiment, a circumferential gap G (see Figure 8(b)) is formed between the partition wall 313 surrounding the first bent passage 314a and the partition wall 313 surrounding the first bent passage 314b in the region between the respective inlets 310 and 311. That is, the partition wall 313 separating the first bent passage 314a and the partition wall 313 separating the first bent passage 314b are separated by a circumferential gap. 【0103】 This prevents, for example, exhaled air flowing through the first and second bent channels 314a and 315a from flowing into the first and second bent channels 314b and 315b. Therefore, it is possible to prevent exhaled air blown into one of the inlet ports 310 and 311 from being falsely detected by the temperature sensor 360 (see Figure 4) (hereinafter simply referred to as "sensor") for the other inlet port, thereby enabling accurate detection of the performer's exhaled air. 【0104】 Furthermore, since the first mounting member 39 is formed using a softer material (rubber or elastomer) than the resin lip plate 331, the partition wall 313 of the lip plate 331 can more easily adhere to the surface of the first mounting member 39. This prevents, for example, exhaled air flowing through the first and second bent channels 314a and 315a from flowing into the first and second bent channels 314b and 315b. Therefore, it is possible to prevent exhaled air blown into one of the inlet 310 and 311 from being falsely detected by the sensor for the other inlet, thereby enabling accurate detection of the performer's exhaled air. 【0105】 Furthermore, a groove 393 (see Figure 7) for fitting the partition wall 313 is formed on the surface of the first mounting member 39 (see Figure 9(b) for the state in which the partition wall 313 is fitted into the groove 393). The groove 393 is formed in a shape (rectangle) that corresponds to the tip of the partition wall 313, and by fitting the partition wall 313 into this groove 393, it is possible to suppress the flow of exhaled air through the first and second bent passages 314a and 315a to the first and second bent passages 314b and 315b. Therefore, it is possible to suppress the false detection of exhaled air blown into one of the inlet 310 and 311 by the sensor for the other inlet, thereby enabling accurate detection of the performer's exhaled air. 【0106】 Here, when playing a flute-like instrument using the electronic wind instrument 301, as shown in Figure 9(b), exhaled air is blown in with the lips L resting against the surface (outer surface) of the lip plate 331 near the lower mouthpiece 311. When the performer blows air towards the upper mouthpiece 310, the air is blown in a direction close to the tangential direction of the outer surface of each housing 32, 33 (hereinafter referred to as "upward direction A"). On the other hand, when blowing air towards the lower mouthpiece 311, the air is blown in a direction tilted lower than upward direction A (at an angle closer to the radial direction than upward direction A) (hereinafter referred to as "downward direction B"). When blowing air into each mouthpiece 310, 311 in this way, especially when blowing air in downward direction B, some of that exhaled air also flows towards the upper mouthpiece 310. 【0107】 In contrast, in this embodiment, the distance Lc between the opening edge 310a of the upper air intake 310 and the opening edge 311a of the lower air intake 311 in the circumferential direction is formed to be larger than the opening dimension La of the opening edge 310a of the upper air intake 310 in the circumferential direction of each housing 32, 33. Also, the distance Lc between the opening edges 310a, 311a of each air intake 310, 311 is formed to be larger than the opening dimension Lb of the opening edge 311a of the lower air intake 311 in the circumferential direction. 【0108】 In this way, by forming a relatively large spacing Lc between each of the inlet ports 310, 311 in the circumferential direction, it is possible to suppress the introduction of exhaled air blown upward A (towards the upper inlet port 310) into the lower inlet port 311, and conversely, to suppress the introduction of exhaled air blown downward B (towards the lower inlet port 311) into the upper inlet port 310. This prevents exhaled air blown into one of the inlet ports 310, 311 from being falsely detected by the sensor for the other inlet. Therefore, the performer's exhaled air can be detected with high accuracy. 【0109】 Furthermore, each of the inlet ports 310 and 311 is formed in a recess 318 provided on the surface of the lip plate 331. The recess 318 comprises a bottom surface 318a that is lower in height than the surface of the lip plate 331, and an inner wall surface 318b that rises from the outer edge of the bottom surface 318a, with the upper end of the inner wall surface 318b being connected to the surface of the lip plate 331. 【0110】By forming the inlets 310 and 311 on the bottom surface 318a of the recess 318 (the inside of the recess 318), the height of the opening edges 310a and 311a of each inlet 310 and 311 can be made lower than the surface of the lip plate 331. This makes it easier to introduce the necessary amount of exhaled air into each inlet 310 and 311 without diffusion when exhaled air is blown upward A or downward B with the lips L (see Figure 9(b)) resting on the surface of the lip plate 331 near the lower inlet 311. Furthermore, it is possible to suppress the sensor from falsely detecting natural wind other than the performer's exhaled air. Therefore, the performer's exhaled air can be detected with high accuracy. 【0111】 Next, with reference to Figure 10, the electronic wind instrument 401 of the fourth embodiment will be described. In the third embodiment, the case in which the opening edges 310a and 311a of each blowing port 310 and 311 are formed on the bottom surface 318a of the recess 318 was described. In the fourth embodiment, the case in which the opening edges 310a and 311a of each blowing port 310 and 311 are surrounded by partition walls 319a and 319b rising from the bottom surface 318a of the recess 318 will be described. Figure 10(a) is a partially enlarged perspective view of the electronic wind instrument 401 of the fourth embodiment, and Figure 10(b) is a partially enlarged cross-sectional view of the electronic wind instrument 401. 【0112】 As shown in Figure 10, the lip plate 431 of the electronic wind instrument 401 of the fourth embodiment has partition walls 319a and 319b (first partition wall and second partition wall) formed around each of the mouthpieces 310 and 311. Each of the partition walls 319a and 319b comprises a first wall portion 319a1 and 319b1 formed in the region between the mouthpieces 310 and 311, and a pair of second wall portions 319a2 and 319b2 connected to the axial ends of the first wall portion 319a1 and 319b1, and each of these wall portions 319a1, 319a2, 319b1 and 319b2 is integrally formed on the bottom surface 318a of the recess 318. 【0113】Each of the wall portions 319a1, 319a2, 319b1, and 319b2 is formed as a wall that rises vertically from the bottom surface 318a of the recess 318, and the first wall portions 319a1 and 319b1 extend linearly in the axial direction. The second wall portions 319a2 and 319b2 extend linearly in the circumferential direction, and both circumferential ends of the second wall portions 319a2 and 319b2 are connected to the first wall portions 319a1 and 319b1 and the inner wall surface 318b of the recess 318. 【0114】 By surrounding each inlet 310, 311 with partition walls 319a and 319b, even if exhaled air blown upward A bounces off the inner wall surface 318b and flows towards the lower inlet 311, the partition wall 319b can block the flow of exhaled air toward the lower inlet 311. Also, if exhaled air is blown downward B, the partition wall 319a can block the flow of exhaled air toward the upper inlet 310. Therefore, it is possible to suppress the introduction of exhaled air blown into one of the inlets 310, 311 into the other inlet, thereby enabling accurate detection of the performer's exhaled air. 【0115】 Furthermore, the height of the partition wall 319a from the bottom surface 318a of the recess 318 is formed to be higher than the height of the partition wall 319b from the bottom surface 318a. This effectively prevents exhaled air blown downwards B from being introduced into the upper inlet 310. Therefore, the performer's exhaled air can be detected with high accuracy. 【0116】 When partition walls 319a and 319b are formed surrounding each of the inlet ports 310 and 311, the inner and radial upper ends of the partition walls 319a and 319b become the opening edges 310a and 311a of each of the inlet ports 310 and 311. In this embodiment as well, the distance Lc between the opening edges 310a and 311a of each of the inlet ports 310 and 311 is made larger than the opening dimensions La and Lb of the opening edges 310a and 311a of each of the inlet ports 310 and 311 in the circumferential direction of each housing 32 and 33. This prevents exhaled air blown upward A from being introduced into the lower inlet port 311 and exhaled air blown downward B from being introduced into the upper inlet port 310, thereby enabling accurate detection of the performer's exhaled breath. 【0117】Furthermore, the upper ends of the partition walls 319a and 319b (i.e., the opening edges 310a and 311a of each inlet 310 and 311) are formed lower than the upper end of the inner wall surface 318b (the surface of the lip plate 431). This allows the necessary amount of exhaled air to be introduced into each inlet 310 and 311 without diffusion when exhaled air is blown into the surface of the lip plate 431 with the lips resting on it near the lower inlet 311. Thus, the performer's exhaled air can be detected with high accuracy. 【0118】 Next, with reference to Figure 11, the electronic wind instrument 501 of the fifth embodiment will be described. In the fourth embodiment, a case was described in which partition walls 319a and 319b are formed around each of the blowing holes 310 and 311. In the fifth embodiment, a case will be described in which a partition wall 319a is formed around the upper blowing hole 310, while inclined surfaces 311b to 311d are formed around the lower blowing hole 311. Figure 11(a) is a partially enlarged perspective view of the electronic wind instrument 501 of the fifth embodiment, and Figure 11(b) is a partially enlarged cross-sectional view of the electronic wind instrument 501. 【0119】 As shown in Figure 11, in the fifth embodiment, the lip plate 531 of the electronic wind instrument 501 has a partition wall 319a surrounding the upper blowing port 310, while the partition wall 319b (see Figure 10) surrounding the lower blowing port 311 is omitted. The partition wall 319a comprises a pair of second wall portions 319a2 and a third wall portion 319a3 that connects the pair of second wall portions 319a2 in the axial direction. That is, the partition wall 319a does not have the first wall portion 319a1 (see Figure 10) described in the fourth embodiment. The third wall portion 319a3 is formed in the shape of a wall that rises substantially vertically from the surface of the lip plate 531, and one end of the second wall portions 319a2 in the circumferential direction of each housing 32, 33 (the end opposite to the lower blowing port 311) is connected by the third wall portion 319a3. 【0120】Thus, in this embodiment, a third wall portion 319a3 is formed on one side of the opening edge 310a of the upper inlet 310 in the circumferential direction of each housing 32, 33 (the edge opposite to the lower inlet 311), while a partition wall 319a is not formed on the other side of the circumferential direction (the edge on the lower inlet 311 side). As a result, the exhaled air blown upward A can be received by the third wall portion 319a3, making it easier for exhaled air to be introduced into the upper inlet 310. Therefore, the exhaled air blown into the upper inlet 310 can be detected with high accuracy. 【0121】 Furthermore, a second wall portion 319a2 is formed on both sides of the opening edge 310a of the upper inlet 310 in the axial direction of each housing 32, 33. As a result, even if the exhaled air received by the third wall portion 319a3 flows to spread out on both sides of the third wall portion 319a3 (upper inlet 310) in the axial direction, the exhaled air that has flowed in this manner can be introduced into the upper inlet 310 by the second wall portion 319a2. Therefore, the exhaled air blown into the upper inlet 310 can be detected with high accuracy. 【0122】 In particular, in this embodiment, the height of the second and third wall portions 319a2 and 319a3 from the bottom surface 318a of the recess 318 is formed to be higher than the height of the inner wall surface 318b. This allows the exhaled air blown upward A to be effectively introduced into the upper inlet 310 by the second and third wall portions 319a2 and 319a3. Therefore, the exhaled air blown into the upper inlet 310 can be detected with high accuracy. 【0123】The opening edge 311a of the lower inlet 311 has inclined surfaces 311b to 311d that guide the introduction of exhaled air into the lower inlet 311. Inclined surface 311b is a plane that slopes downward from the upper inlet 310 side toward the opening edge 311a of the lower inlet 311, and the upper end of inclined surface 311b is connected to the bottom surface 318a of the recess 318. Also, inclined surfaces 311c and 311d are planes that slope downward from both sides in the axial direction of the lower inlet 311 toward the opening edge 311a of the lower inlet 311, and the upper ends of inclined surfaces 311c and 311d are connected to the bottom surface 318a of the recess 318. By forming such inclined surfaces 311b to 311d on the lower inlet 311, exhaled air blown downward B is more easily introduced into the lower inlet 311 along each of the inclined surfaces 311b to 311d. Therefore, the exhaled air blown into the lower inlet 311 can be detected with high accuracy. 【0124】 Furthermore, in this embodiment as well, the distance Lc between the opening edges 310a and 311a of each inlet 310 and 311 is made larger than the opening dimensions La and Lb of the opening edges 310a and 311a of each inlet 310 and 311 in the circumferential direction. This prevents exhaled air blown upward A from being introduced into the lower inlet 311, and exhaled air blown downward B from being introduced into the upper inlet 310, thereby enabling accurate detection of the performer's exhaled breath. 【0125】 Furthermore, the opening edge 311a of the lower inlet 311 is formed at a lower position than the upper end of the inner wall surface 318b of the recess 318 (the surface of the lip plate 531). This makes it easier to introduce the necessary amount of exhaled air into the lower inlet 311 without diffusing the exhaled air when exhaled air is blown in with the lips resting on the surface of the lip plate 531 near the lower inlet 311. 【0126】 Furthermore, the lower air inlet 311 (see Figures 12-14) in the sixth to eighth embodiments described below has the same configuration as in this embodiment. Inclined surfaces 311b to 311d connected to the lower air inlet 311 are formed, and the opening edge 311a of the lower air inlet 311 is formed at a position lower than the upper end of the inner wall surface 318b of the recess 318, thus achieving the same effects as in this embodiment. 【0127】Next, with reference to Figure 12, the electronic wind instrument 601 of the sixth embodiment will be described. In the fifth embodiment, the case in which one circumferential end of a pair of second wall portions 319a2 is connected by a third wall portion 319a3 was described, but in the sixth embodiment, the case in which the upper ends of a pair of second wall portions 319a2 are also connected by a third wall portion 319a3 will be described. Figure 12(a) is a partially enlarged perspective view of the electronic wind instrument 601 of the sixth embodiment, and Figure 12(b) is a partially enlarged cross-sectional view of the electronic wind instrument 601. 【0128】 As shown in Figure 12, the lip plate 631 of the electronic wind instrument 601 of the sixth embodiment is formed in a curved shape in which the third wall portion 319a3 is convex in the direction away from the lower blowing port 311. The third wall portion 319a3 is inclined upward from its lower end to its upper end so as to approach the lower blowing port 311, and in addition to the ends of the pair of second wall portions 319a2 in the circumferential direction of each housing 32, 33 (the ends opposite to the lower blowing port 311), the upper ends of the pair of second wall portions 319a2 are also connected by the third wall portion 319a3. 【0129】 The opening edge 310a of the upper inlet 310, surrounded by these second and third wall portions 319a2 and 319a3 and the bottom surface 318a of the recess 318, is formed to face the lower inlet 311 side (it opens toward the lower inlet 311 side). This allows exhaled air blown upward A to be effectively introduced into the upper inlet 310, so that exhaled air blown into the upper inlet 310 side can be detected with high accuracy. 【0130】 Furthermore, in this embodiment as well, the distance Lc between the opening edges 310a, 311a of each inlet 310, 311 is formed to be larger than the opening dimension Lb of the opening edge 311a of the lower inlet 311 in the circumferential direction. This prevents exhaled air blown upward A from being introduced into the lower inlet 311, and exhaled air blown downward B from being introduced into the upper inlet 310, thereby enabling accurate detection of the performer's exhaled air. 【0131】Next, with reference to Figure 13, the electronic wind instrument 701 of the seventh embodiment will be described. In the fifth and sixth embodiments, the case in which the height of the partition wall 319a is higher than the height of the inner wall surface 318b of the recess 318 was described, but in the seventh embodiment, the case in which the height of the partition wall 319a is the same as the height of the inner wall surface 318b of the recess 318 will be described. Figure 13(a) is a partially enlarged perspective view of the electronic wind instrument 701 of the seventh embodiment, and Figure 13(b) is a partially enlarged cross-sectional view of the electronic wind instrument 701. 【0132】 As shown in Figure 13, in the seventh embodiment of the electronic wind instrument 701, the lip plate 731 has a height such that the height of the partition wall 319a (first and second wall portions 319a1 and 319a2) from the bottom surface 318a of the recess 318 matches the height of the inner wall surface 318b from the bottom surface 318a. In other words, the opening edge 310a of the upper blowing port 310 surrounded by the first and second wall portions 319a1 and 319a2 is formed at a height that matches the surface of the lip plate 731. 【0133】 Even when such first and second wall portions 319a1 and 319a2 are formed around the upper inlet 310, when exhaled air is blown downward B, the flow of exhaled air toward the upper inlet 310 can be effectively blocked by the first and second wall portions 319a1 and 319a2. Therefore, it is possible to suppress the introduction of exhaled air blown toward the lower inlet 311 into the upper inlet 310. 【0134】 Furthermore, in this embodiment as well, the distance Lc between the opening edges 310a and 311a of each inlet 310 and 311 is made larger than the opening dimensions La and Lb of each inlet 310 and 311 in the circumferential direction of each housing 32 and 33. This prevents exhaled air blown upward A from being introduced into the lower inlet 311, and exhaled air blown downward B from being introduced into the upper inlet 310, thereby enabling accurate detection of the performer's breath. 【0135】Next, with reference to Figure 14, the electronic wind instrument 801 of the eighth embodiment will be described. In the seventh embodiment, the case in which the partition wall 319a comprises first and second wall portions 319a1 and 319a2 was described, but in the eighth embodiment, the case in which a fourth wall portion 319a4 is connected to the radial upper ends of the first and second wall portions 319a1 and 319a2 will be described. Figure 14(a) is a partially enlarged perspective view of the electronic wind instrument 801 of the eighth embodiment, and Figure 14(b) is a partially enlarged cross-sectional view of the electronic wind instrument 801. 【0136】 As shown in Figure 14, in the eighth embodiment, the lip plate 831 of the electronic wind instrument 801 is connected radially by a fourth wall portion 319a4 extending axially from each housing 32, 33, to the radially upper ends of the first and second wall portions 319a1 and 319a2. That is, the radially upper end portion of the upper blowing port 310 is closed by the fourth wall portion 319a4. 【0137】 The opening edge 310a of the upper inlet 310, surrounded by these walls 319a1, 319a2, and 319a4, is formed to face away from the lower inlet 311 side (the performer's side). This effectively prevents exhaled air blown downwards (B) from being introduced into the upper inlet 310, allowing for accurate detection of the performer's breath. 【0138】 Furthermore, in this embodiment as well, the distance Lc between the opening edges 310a, 311a of the upper inlets 310, 311 is larger than the opening dimension Lb of the opening edge 311a of the lower inlet 311 in the circumferential direction of each housing 32, 33. This prevents exhaled air blown upward A from being introduced into the lower inlet 311, and exhaled air blown downward B from being introduced into the upper inlet 310, thereby enabling accurate detection of the performer's exhaled air. 【0139】Next, the electronic wind instrument 901 of the ninth embodiment will be described with reference to Figure 15. In the fifth to eighth embodiments, the case in which inclined surfaces 311b to 311d are formed on the lower blowing port 311 was described, but in the ninth embodiment, the case in which inclined surfaces 310b to 310d are also formed on the upper blowing port 310 will be described. Figure 15(a) is a partially enlarged perspective view of the electronic wind instrument 901 of the ninth embodiment, and Figure 15(b) is a partially enlarged cross-sectional view of the electronic wind instrument 901. 【0140】 As shown in Figure 15, the lip plate 931 of the electronic wind instrument 901 of the ninth embodiment has inclined surfaces 310b to 310d that guide the introduction of exhaled air into the upper mouthpiece 310. The inclined surface 310b is a plane that slopes downward from the lower mouthpiece 311 side toward the opening edge 310a of the upper mouthpiece 310, and the upper end of the inclined surface 310b is connected to the upper end of the inclined surface 311b of the lower mouthpiece 311. 【0141】 Each of the inclined surfaces 310c and 310d slopes downward from both sides in the axial direction of the upper inlet 310 toward the opening edge 310a of the upper inlet 310. In this embodiment, except for the areas where each inlet 310 and 311 are formed, the lower end of the inner wall surface 318b of the recess 318 is connected to the inclined surfaces 310c, 310d, 311c, and 311d around its entire circumference. That is, in this embodiment, the entire bottom surface of the recess 318 is formed by the inclined surfaces 310b to 310d and 311b to 311d. 【0142】 By forming such inclined surfaces 310b to 310d and 311b to 311d, for example, exhaled air blown upward A is more easily introduced into the upper inlet 310 along each of the inclined surfaces 310b to 310d. Furthermore, even if the exhaled air blown upward A bounces back from the inner wall surface 318b on the upper inlet 310 side of the recess 318 towards the lower inlet 311, the bounced air can be released along the inclined surface 310b in a direction away from the lower inlet 311 (upward in the radial direction). Therefore, it is possible to suppress the introduction of exhaled air blown upward A into the lower inlet 311. 【0143】Furthermore, when exhaled air is blown downwards (B), it is easier for that exhaled air to be introduced into the lower inlet 311 along the inclined surfaces 311b to 311d, and the exhaled air flowing towards the upper inlet 310 can be released away from the upper inlet 310 (towards the upward radial direction) by the inclined surface 311b. Therefore, the performer's exhaled air can be detected with high accuracy. 【0144】 Furthermore, in this embodiment as well, the distance Lc between the opening edges 310a and 311a of each inlet 310 and 311 in the circumferential direction of each housing 32 and 33 is made larger than the opening dimensions La and Lb of the opening edges 310a and 311a of each inlet 310 and 311a. This makes it possible to suppress, for example, the introduction of exhaled air blown upward A into the lower inlet 311, and the introduction of exhaled air blown downward B into the upper inlet 310. 【0145】 Furthermore, since the opening edges 310a and 311a of each inlet 310 and 311 are formed at a lower position than the upper end of the inner wall surface 318b of the recess 318 (the surface of the lip plate 931), when exhaled air is blown into the mouthpiece with the lips resting on the surface of the lip plate 931 near the lower inlet 311, the required amount of exhaled air is easily introduced into each inlet 310 and 311 without the exhaled air being dispersed. Therefore, the performer's exhaled air can be detected with high accuracy. 【0146】 Next, with reference to Figure 16, the electronic wind instrument 1001 of the tenth embodiment will be described. In the ninth embodiment, the case in which inclined surfaces 310b to 310d and 311b to 311d are formed on each of the blowing holes 310 and 311 was described. In the tenth embodiment, in addition to these inclined surfaces 310b to 310d and 311b to 311d, the case in which a partition wall 319c is formed between each of the blowing holes 310 and 311 will be described. Figure 16(a) is a partially enlarged perspective view of the electronic wind instrument 1001 of the tenth embodiment, and Figure 16(b) is a partially enlarged cross-sectional view of the electronic wind instrument 1001. 【0147】As shown in Figure 16, the lip plate 1031 of the electronic wind instrument 1001 of the 10th embodiment is provided with inclined surfaces 310b to 310d and 311b to 311d formed on each of the mouthpieces 310 and 311. The inclined surfaces 311b to 311d of the lower mouthpiece 311 have the same configuration as the inclined surfaces 311b to 311d of the 5th to 8th embodiments (see Figures 11 to 14). The upper ends of the inclined surfaces 310b to 310d of the upper mouthpiece 310 are connected to the bottom surface 318a of the recess 318, and the upper end of the inclined surface 310b of the upper mouthpiece 310 and the upper end of the inclined surface 311b of the lower mouthpiece 311 are separated in the circumferential direction of each housing 32 and 33. 【0148】 By forming these inclined surfaces 310b-310d and 311b-311d, exhaled air blown upward A or downward B can be received by each of the inclined surfaces 310b-310d and 311b-311d towards the respective inlet 310 and 311 sides. Therefore, the performer's exhaled air can be detected with high accuracy. 【0149】 In this embodiment, the partition wall 319a comprises only a third wall portion 319a3 formed on one side of the circumferential edge of the upper inlet 310 (the edge opposite to the lower inlet 311). Even with this configuration, the exhaled air blown upward A can be received by the third wall portion 319a3 and introduced into the upper inlet 310. Therefore, the exhaled air blown into the upper inlet 310 can be detected with high accuracy. 【0150】 A partition wall 319c (third partition wall) is formed on the bottom surface 318a of the recess 318, which separates each of the air inlets 310 and 311. The partition wall 319c is formed in the shape of a wall that extends linearly along the axial direction of each housing 32 and 33, and both ends of the partition wall 319c extend on both sides in the axial direction beyond the opening edges 310a and 311a (inclined surfaces 310b to 310d, 311b to 311d) of each of the air inlets 310 and 311, and are connected to the inner wall surface 318b of the recess 318. That is, the length of the partition wall 319c in the axial direction is formed to be larger than the opening dimensions of the opening edges 310a and 311a in the axial direction. 【0151】By partitioning each of the inlets 310 and 311 with such a partition wall 319c, even if exhaled air blown upward A bounces back from the third wall 319a3 towards the lower inlet 311, the flow of that bounced exhaled air can be blocked by the partition wall 319c. Also, if exhaled air is blown downward B, the flow of exhaled air toward the upper inlet 310 can be blocked by the partition wall 319c. Therefore, it is possible to suppress the introduction of exhaled air blown into one of the inlets 310 and 311 into the other inlet, thereby enabling accurate detection of the performer's exhaled air. 【0152】 Furthermore, in this embodiment as well, the distance Lc between the opening edges 310a and 311a of each inlet 310 and 311 in the circumferential direction of each housing 32 and 33 is made larger than the opening dimensions La and Lb of the opening edges 310a and 311a of each inlet 310 and 311a. This makes it possible to suppress, for example, the introduction of exhaled air blown upward A into the lower inlet 311, and the introduction of exhaled air blown downward B into the upper inlet 310. 【0153】 Furthermore, since the opening edges 310a and 311a of each inlet 310 and 311 are formed at a lower position than the upper end of the inner wall surface 318b of the recess 318 (the surface of the lip plate 1031), when exhaled air is blown into the mouthpiece with the lips resting on the surface of the lip plate 1031 near the lower inlet 311, the required amount of exhaled air is easily introduced into each inlet 310 and 311 without the exhaled air being dispersed. Therefore, the performer's exhaled air can be detected with high accuracy. 【0154】 Next, an electronic wind instrument 1101 of the 11th embodiment will be described with reference to Figures 17 to 19. In the above embodiments, the case in which each of the mouthpieces 310 and 311 is formed on the lip plate was described, but in the 11th embodiment, the case in which a second mounting member 40 equipped with each of the mouthpieces 310 and 311 is sandwiched between the first mounting member 39 and the lip plate 1131 will be described. 【0155】Figure 17 is an exploded perspective view of the electronic wind instrument 1101 of the 11th embodiment, Figure 18(a) is a perspective view of the second mounting member 40 viewed from the inside, and Figure 18(b) is a perspective view of the lip plate 1131 viewed from the inside. Figure 19(a) is a partially enlarged perspective view of the electronic wind instrument 1101, and Figure 19(b) is a partially enlarged cross-sectional view of the electronic wind instrument 1101. 【0156】 As shown in Figures 17 and 18, in the 11th embodiment of the electronic wind instrument 1101, the second mounting member 40 and the lip plate 1131 are superimposed on the first mounting member 39. The second mounting member 40 is made of rubber or elastomer, and an upper blowing port 410 and a lower blowing port 411 pass through the second mounting member 40. These blowing ports 410 and 411 have the same configuration as the blowing ports 310 and 311 of the fifth embodiment described above (see Figure 11). 【0157】 An insertion hole 412 is formed in the center of the second mounting member 40, and bolts B2 inserted from the inside into the insertion holes 392 and 412 of each mounting member 39 and 40 are screwed into the bolt holes 312 of the lip plate 1131 (see Figure 18(b)), thereby attaching the lip plate 1131 to the mounting hole 322 (outer surface of the blowing side housing 32). In this mounting state, the second mounting member 40 is sandwiched between the first mounting member 39 and the lip plate 1131, and the blowing ports 410 and 411 of the second mounting member 40 are positioned inside the through holes 1131a and 1131b that penetrate the lip plate 1131 (see Figure 19(a)). 【0158】 A partition wall 413 (see Figure 18(a)) is integrally formed on the back surface (inner surface) of the second mounting member 40. The partition wall 413 has the same configuration as the partition wall 313 (see Figure 8(b)) of the third embodiment described above. 【0159】When the lip plate 1131 is installed, the partition wall 413 of the second mounting member 40 comes into contact with the surface of the first mounting member 39 which constitutes the bottom surface of the mounting hole 322, thereby forming each of the bent channels 414a, 415a, 414b, and 415b (see Figure 18(a)) surrounded by the first mounting member 39 and the partition wall 413. Each of these bent channels 414a, 415a, 414b, and 415b of the first mounting member 39 has the same configuration as each of the bent channels 314a, 315a, 314b, and 315b of the third embodiment (see Figure 8(b)). 【0160】 In this embodiment as well, the partition wall 413 is pressed against the first mounting member 39 which constitutes the bottom surface of the mounting hole 322, thereby forming the bent passages 414a, 414b, 415a, and 415b, and the second mounting member 40, which is equipped with the inlet ports 410, 411 and the partition wall 413, is detachable from the mounting hole 322 of the inlet housing 32. This makes it easy to perform maintenance (such as cleaning) on ​​the inlet ports 410, 411 and the bent passages 414a, 414b, 415a, and 415b. 【0161】 Furthermore, since the first and second mounting members 39 and 40 are formed using a softer material (rubber or elastomer) than the resin lip plate 1131, the partition wall 413 of the second mounting member 40 can more easily adhere to the surface of the first mounting member 39. This makes it possible to suppress, for example, the inflow of exhaled air flowing through the first and second bent passages 414a and 415a into the first and second bent passages 414b and 415b. 【0162】 Furthermore, the partition wall 413 of the second mounting member 40 is fitted into the groove 393 (see Figure 17) formed on the surface of the first mounting member 39. This also prevents exhaled air flowing through the first and second bent passages 414a and 415a from flowing into the first and second bent passages 414b and 415b. Therefore, it is possible to prevent exhaled air blown into one of the inlet 410 and 411 from being falsely detected by the sensor for the other inlet, thereby enabling accurate detection of the performer's exhaled air. 【0163】As shown in Figure 19, the lip plate 1131 has a recess 318 formed therein, which has the bottom surface 318a and the inner wall surface 318b described above. In the region where the through holes 1131a and 1131b of the lip plate 1131 are formed, the bottom surface 318a of the recess 318 is formed by the surface of the second mounting member 40. 【0164】 The second mounting member 40 has a partition wall 416 that surrounds the opening edge 410a of the upper inlet 410, and this partition wall 416 is fitted into the through hole 1131a of the lip plate 1131. The partition wall 416 has the same configuration as the partition wall 319a of the fifth embodiment (which includes the second and third wall portions 319a2 and 319a3 shown in Figure 11). This allows the exhaled air blown upward A to be received by the partition wall 416 and introduced into the upper inlet 410. 【0165】 Furthermore, the opening edge 411a of the lower inlet 411 is formed with inclined surfaces 411b to 411d similar to the inclined surfaces 311b to 311d of the fifth embodiment (see Figure 11). This allows the exhaled air blown downward B to be received by the lower inlet 311 side by each of the inclined surfaces 411b to 411d. 【0166】 Furthermore, in this embodiment as well, the distance Lc between the opening edges 410a and 411a of each inlet 410 and 411 is made larger than the opening dimensions La and Lb of the opening edges 410a and 411a of each inlet 410 and 411 in the circumferential direction. This makes it possible to suppress, for example, the introduction of exhaled air blown upward A into the lower inlet 411, and the introduction of exhaled air blown downward B into the upper inlet 410. 【0167】 Furthermore, since the opening edge 411a of the lower inlet 411 is formed at a lower position than the upper end of the inner wall surface 318b of the recess 318 (the surface of the lip plate 1131), when exhaled air is blown in with the lips resting against the surface of the lip plate 1131 near the lower inlet 411, the required amount of exhaled air is easily introduced into the lower inlet 411 without the exhaled air being dispersed. 【0168】Next, a modified example of the first mounting member 39 and the second mounting member 40 will be described with reference to Figure 20. Figure 20 is a perspective view of the first mounting member 39 and the second mounting member 40 in the modified example. 【0169】 As shown in Figure 20, in the modified example, the first mounting member 39 and the second mounting member 40 are connected via a hinge 41 (connecting part) at the outer edges of each mounting member 39 and 40. The first mounting member 39, the second mounting member 40 and the hinge 41 are integrally formed using rubber or elastomer, and the hinge 41 is formed in a flat plate shape that connects the surface of the first mounting member 39 and the back surface of the second mounting member 40. 【0170】 Figure 20 illustrates the state in which a force is applied to resist the elastic force of the hinge 41, pulling the second mounting member 40 away from the first mounting member 39. However, when no such force is applied, the second mounting member 40 overlaps the first mounting member 39. The state in which the mounting members 39 and 40 overlap is a state in which the relative positions of the groove 393 of the first mounting member 39 and the partition wall 413 of the second mounting member 40 are generally determined. 【0171】 By connecting the mounting members 39 and 40 with such hinges 41, the mounting members 39 and 40 can be simultaneously attached to the mounting holes 322 (see Figure 17) of the blowing-side housing 32. In this attached state of the mounting members 39 and 40, as described above, the partition wall 413 of the second mounting member 40 is fitted into the groove 393 of the first mounting member 39, thereby forming the bent passages 414a, 415a, 414b, and 415b surrounded by the surface of the first mounting member 39 and the partition wall 413, and the blowing ports 410 and 411 are connected to the housing-side passage 323 by these bent passages 414a, 415a, 414b, and 415b. 【0172】 On the other hand, when removing each mounting member 39, 40 from the mounting hole 322 (see Figure 17), the first mounting member 39 connected to the hinge 41 can also be removed at the same time by pulling the second mounting member 40. Therefore, when performing maintenance (such as cleaning) or replacement of each mounting member 39, 40, each mounting member 39, 40 can be easily attached to and detached from the mounting hole 322, thereby improving the work efficiency of the attachment and detachment process. 【0173】 Although the above-described embodiments have been explained, the present invention is not limited in any way to the above embodiments, and it can be easily inferred that various improvements and modifications are possible without departing from the spirit of the present invention. 【0174】 In the embodiments described above, the electronic wind instrument 1,201 was described as an electronic instrument that imitates a flute, but it is not necessarily limited to this. For example, the electronic wind instrument 1,201 may imitate other wind instruments (such as a saxophone, clarinet, recorder, flute, piccolo, etc.). 【0175】 In the embodiments described above, a configuration was described in which each of the bent passages 314a and 315a is heated by a heater 341, that is, a configuration in which a substrate 34 is provided on the bottom surface 322a of the mounting hole 322 of the lip plate 31, but the invention is not limited to this. For example, the substrate 34 (heater 341) may be provided on the inner circumferential surface of the blowing-side housing 32 on the opposite side of the bottom surface 322a, or the substrate 34 (heater 341) may be omitted. In addition, a substrate (heater) may be provided to heat the case-side passage 355. 【0176】 In the embodiments described above, the main flow path is described as being composed of a first bent flow path 314a, a second bent flow path 315a, a housing-side flow path 323, a throttling flow path 326, and a case-side flow path 355, but the invention is not necessarily limited to this. For example, some or all of the connection parts of each of these flow paths 314a, 315a, 323, 326, and 355 may be modified, or a part of each of the flow paths 314a, 315a, 323, 326, and 355 may be bent. In other words, the shape of the main flow path connecting each of the inlet ports 310 and 311 to the first exhaust port 334 can be arbitrarily changed, and the present invention can be applied to any electronic wind instrument that has branched flow paths that intersect the main flow path. 【0177】In the embodiments described above, the case-side flow path 355, which is part of the main flow path, is formed by the case 35 of the sensor modules Sa and Sb (the sensor modules Sa and Sb provide part of the main flow path), but this is not necessarily the only case. For example, in addition to the case-side flow path 355, the sensor modules Sa and Sb may also provide part or all of the first bent flow path 314a, the second bent flow path 315a, the housing-side flow path 323, and the throttling flow path 326. That is, the lip plate 31 that forms the main flow path, part of the blowing-side housing 32 (for example, the mounting holes 322 and the lower projection 325), and part or all of the substrate 34 may also be components of the sensor modules Sa and Sb. 【0178】 In the embodiments described above, the case in which the lip plate 31 has first bent channels 314a, 314b and second bent channels 315a, 315b is formed, has been explained, but the invention is not limited to this. For example, either the first bent channels 314a, 314b or the second bent channels 315a, 315b may be omitted, and the inlets 310, 311 and the housing-side channel 323 may be connected via the other bent channel. Alternatively, both the first bent channels 314a, 314b and the second bent channels 315a, 315b may be omitted, and the inlets 310, 311 and the housing-side channel 323 may be connected in a straight line. 【0179】 In the embodiments described above, cases in which diaphragm channels 316a and 326 are formed in the middle of each bent channel 314a and 315a, or between the housing-side channel 323 and the case-side channel 355 (i.e., in the main channel upstream of the branched channel) have been explained, but the invention is not limited to these cases. For example, either one or both of the diaphragm channels 316a and 326 may be omitted, or a diaphragm channel may be formed in the case-side channel 355 (i.e., in the case 35). 【0180】 In the embodiments described above, a case in which a leak channel 322b is formed in the second bent channel 315a (the main channel upstream of the branch channel) was explained, but the invention is not necessarily limited to this. For example, the leak channel 322b may be omitted (the gap between the substrate 34 and the blowing-side housing 32 may be sealed), or a channel equivalent to the leak channel 322b may be formed in another part of the main channel. 【0181】In the embodiments described above, the cases in which the first and second exhaust ports 334 and 335 are formed in the exhaust-side housing 33 have been explained, but the invention is not necessarily limited to these cases. For example, an exhaust port corresponding to the first exhaust port 334 (i.e., an exhaust port for exhausting exhaled air from the main flow path) may be formed in the inlet-side housing 32, or the second exhaust port 335 may be omitted (or in addition to the second exhaust port) and an exhaust port for ventilating the internal space S1 of each housing 32, 33 may be formed in the inlet-side housing 32. 【0182】 In the embodiments described above, the case in which the opening dimension of the second exhaust port 335 in the circumferential direction expands toward the outer circumference has been explained, but this is not necessarily the only case. For example, the opening dimension of the second exhaust port 335 in the circumferential direction may be constant from the inner circumference to the outer circumference, or it may narrow from the inner circumference to the outer circumference. 【0183】 In the embodiments described above, the exhaust ports 334, 335 and recesses 333b are covered by a decorative body 37 in which the first to third covering portions 370 to 372 are integrally formed, but the invention is not limited to this. For example, the first to third covering portions 370 to 372 may be formed separately, or some or all of the first to third covering portions 370 to 372 may be omitted. 【0184】 In the embodiments described above, the second exhaust port 335 is covered by a second covering portion 371 that extends in the axial direction, but the invention is not limited to this. For example, the second exhaust port 335 may be covered with a covering portion having a through hole that penetrates radially, similar to the first covering portion 370 and the third covering portion 372, or the first exhaust port 334 and the recess 333b may be covered with a covering portion that extends in the axial direction. 【0185】 In the embodiments described above, a case was described in which a pair of inclined surfaces 371a are formed on the inner circumferential surface of the second covering portion 371 so as to be aligned via a ridge, but the invention is not necessarily limited to this. For example, a flat or curved surface may be formed at the boundary between the pair of inclined surfaces 371a, or the inner circumferential surface of the second covering portion 371 may be flat. 【0186】 In the embodiments described above, bolts are used to fix the components of the electronic wind instrument 1 together, but other screw parts or fastening parts may also be used. 【0187】In the first embodiment described above, a case was described in which a projection 357 is formed on the inner circumferential surface of the case-side flow path 355 (main flow path), but the invention is not necessarily limited to this. For example, the projection 357 may be omitted, and an opening 356a for the branch flow path 356 may be formed on the inner circumferential surface of the case-side flow path 355. Alternatively, in the second embodiment, a projection 357 connected to the conduit 38 (branch flow path 380) may be formed on the inner circumferential surface of the case-side flow path 355. 【0188】 In the first embodiment described above, a case in which a tapered surface 356c is formed in the branched channel 356 was explained, but the invention is not necessarily limited to this. For example, the tapered surface 356c may be omitted, and the cross-sectional area of ​​the branched channel 356 may be constant across both ends in the axial direction, or a surface similar to the tapered surface 356c may be formed on the opening 356b side. 【0189】 In the first embodiment described above, a case was described in which a vent 333c connecting the opening 356b of the branched passage 356 to the outside is formed in the boss 333 (recess 333b), but the invention is not necessarily limited to this. For example, the opening 356b of the branched passage 356 may be connected to the outside via a vent (exhaust port) provided in a part other than the boss 333 (recess 333b). 【0190】 In the third to eleventh embodiments described above, each component such as the inlet 310, 311, 410, 411, inclined surfaces 310b to 310d, 311b to 311d, 411b to 411d, partition wall 319a, partition wall 319b, partition wall 319c, and partition wall 416 is described as being formed in the recess 318 (bottom surface 318a) of the lip plate, but is not necessarily limited to this. For example, the recess 318 may be omitted, and each component may be formed directly on the surface of the lip plate. Alternatively, the lip plate may be omitted, and each component may be formed directly on the outer circumferential surface of the inlet side housing 32. In this configuration as well, the recess 318 may be formed, or it may be omitted. 【0191】In the third to eleventh embodiments described above, a case in which a groove 393 is formed in the mounting member 39 has been explained, but the invention is not limited to this. For example, the groove 393 of the mounting member 39 may be omitted. Also, if the electronic wind instrument does not have a mounting member 39 that can be detachably attached to the blowing side housing 32 (for example, a structure equivalent to the mounting member 39 is integrally formed in the blowing side housing 32), and the bottom surface of the mounting hole 322 is formed by the blowing side housing 32, then a groove 393 may be formed on the bottom surface of the mounting hole 322. 【0192】 In the fourth embodiment described above, a case was explained in which partition walls 319a and 319b are formed around the upper air inlet 310 and the lower air inlet 311, respectively, but the embodiment is not necessarily limited to this. For example, either one of the partition walls 319a or 319b may be omitted, or partition walls 319a and 319b may be added to other embodiments (for example, a partition wall 319b may be formed around the inclined surfaces 311b to 311d of the lower air inlet 311 in the fifth to eighth embodiments). 【0193】 In the fourth embodiment described above, the case in which the height of partition wall 319a is higher than the height of partition wall 319b was explained, but it is not necessarily limited to this. For example, the height of partition wall 319a may be lower than the height of partition wall 319b, or the heights of partition walls 319a and 319b may be made the same. 【0194】 In the tenth embodiment described above, a case in which a partition wall 319c is formed between the upper air inlet 310 and the lower air inlet 311 was explained, but the invention is not necessarily limited to this. For example, the partition wall 319c may be omitted, or a configuration in which the partition wall 319c is added to other embodiments may be used. 【0195】301, 401, 501, 601, 701, 801, 901, 1001, 1101 Electronic wind instrument 331, 431, 531, 631, 731, 831, 931, 1031, 1131 Lip plate 32 Inlet side housing (housing) 322 Mounting hole 33 Exhaust side housing (housing) 310 Upper inlet (first inlet) 310a Opening edge 310b-310d Inclined surface 311 Lower inlet (second inlet) 311a Opening edge 311b-311d Inclined surface 313 Partition 314a, 314b First bent passage (part of the first passage) 315a, 315b Second bent passage (part of the second passage) 318 Recess 318a Bottom surface 318b Inner wall surface 319a Partition wall (first partition wall) 319b Partition wall (second partition wall) 319c Partition wall 360 Temperature sensor (first sensor, second sensor) 363 Pressure sensor (first sensor, second sensor) 39 First mounting member (mounting member) 393 Groove 40 Second mounting member 410 Upper inlet (first inlet) 410a Opening edge 411 Lower inlet (second inlet) 411a Opening edge 413 Partition wall 416 Partition wall (first partition wall) 411b-411d Inclined surface

Claims

1. An electronic wind instrument comprising a cylindrical housing, a first and second inlet arranged circumferentially of the housing, a first and second flow path extending into the interior of the housing from each of the first and second inlet, and a first and second sensor for detecting exhaled air flowing through each of the first and second flow paths, characterized in that the circumferential distance between the first and second inlet is greater than the circumferential opening dimension of at least one of the first and second inlet.

2. An electronic wind instrument comprising a cylindrical housing, a first and second inlet arranged circumferentially of the housing, a first and second flow path extending into the interior of the housing from each of the first and second inlet, and a first and second sensor for detecting exhaled air flowing through each of the first and second flow paths, wherein the housing has a recess formed therein, which includes a bottom surface in which the first and second inlet are formed, and an inner wall surface rising from the outer edge of the bottom surface, and the opening edges of the first and second inlet are formed at a position lower than the upper edge of the inner wall surface of the recess.

3. The electronic wind instrument according to claim 1 or 2, characterized in that it comprises a first partition wall formed around the first inlet and surrounding the opening edge of the first inlet.

4. The electronic wind instrument according to claim 3, characterized in that it comprises a second partition wall formed around the second inlet and surrounding the opening edge of the second inlet.

5. The electronic wind instrument according to claim 4, characterized in that the height of the first partition wall is greater than the height of the second partition wall.

6. The electronic wind instrument according to claim 1 or 2, comprising a lip plate that is detachably attached to a mounting hole provided in the housing, wherein the lip plate comprises a first blowhole and a second blowhole, and a partition wall that protrudes from the inner surface of the lip plate and demarcates the first flow path and the second flow path, and the first flow path and the second flow path are formed by a space surrounded by the partition wall and the bottom surface of the mounting hole.

7. The electronic wind instrument according to claim 6, characterized in that the partition wall forming the first channel and the partition wall forming the second channel are formed with a gap between them in the circumferential direction.

8. The electronic wind instrument according to claim 6, characterized in that a groove is formed in the bottom surface of the mounting hole into which the partition wall is fitted.

9. The electronic wind instrument according to claim 6, further comprising a mounting member that constitutes the bottom surface of the mounting hole, wherein the mounting member is formed using a material softer than the lip plate.

10. The electronic wind instrument according to claim 9, characterized in that the mounting member has a groove formed therein into which the partition wall is fitted.

11. The electronic wind instrument according to claim 1 or 2, comprising: a first mounting member that constitutes the bottom surface of a mounting hole provided in the housing; a second mounting member that is superimposed on the first mounting member; and a lip plate that is attached to the housing with the first mounting member and the second mounting member sandwiched between the housing, wherein the second mounting member comprises a first blowhole and a second blowhole, and a partition wall that protrudes from the inner surface of the second mounting member and demarcates the first flow path and the second flow path, wherein the first flow path and the second flow path are formed by the space surrounded by the partition wall and the first mounting member, and the first mounting member and the second mounting member are each formed using a material softer than the lip plate.

12. The electronic wind instrument according to claim 11, characterized in that the first mounting member has a groove formed therein into which the partition wall is fitted.

13. The electronic wind instrument according to claim 1 or 2, characterized in that the opening edge of the first mouthpiece is formed to face the second mouthpiece.

14. The electronic wind instrument according to claim 1 or 2, characterized in that the opening edge of the first mouthpiece is formed to face the opposite side from the second mouthpiece.

15. An electronic wind instrument according to claim 1 or 2, comprising a first partition wall formed around the first inlet, wherein the first partition wall is formed on the edge of the opening of the first inlet opposite to the second inlet, while the first partition wall is not formed on the edge on the second inlet side.

16. The electronic wind instrument according to claim 15, characterized in that the first partition wall is formed on both sides of the opening edge of the first inlet in the axial direction of the housing.

17. An electronic wind instrument according to claim 1 or 2, characterized in that a partition wall extending in the axial direction of the housing is formed between the first inlet and the second inlet, and both axial ends of the partition wall extend further in the axial direction than the first inlet and the second inlet.

18. The electronic wind instrument according to claim 1 or 2, characterized in that at least one of the first and second blowholes has an inclined surface that slopes downward toward the opening edge of the one blowhole.

19. A method for detecting exhaled breath in an electronic wind instrument, comprising a cylindrical housing, a first inlet and a second inlet arranged circumferentially of the housing, a first flow path and a second flow path extending into the interior of the housing from each of the first inlet and the second inlet, and a first sensor and a second sensor for detecting exhaled breath flowing through each of the first and second flow paths, wherein the circumferential distance between the first inlet and the second inlet is greater than the circumferential opening dimension of at least one of the first inlet and the second inlet, characterized in that the exhaled breath blown into the first inlet is detected by the first sensor, and the exhaled breath blown into the second inlet is detected by the second sensor.

20. A method for detecting exhaled breath in an electronic wind instrument, comprising a cylindrical housing, a first inlet and a second inlet arranged circumferentially of the housing, a first flow path and a second flow path extending into the interior of the housing from each of the first inlet and the second inlet, and a first sensor and a second sensor for detecting exhaled breath flowing through each of the first and second flow paths, wherein a recess is formed in the housing having a bottom surface on which the first inlet and the second inlet are formed, and an inner wall surface rising from the outer edge of the bottom surface, and the opening edges of the first inlet and the second inlet are formed at a position lower than the upper end of the inner wall surface of the recess, characterized in that the exhaled breath blown into the first inlet is detected by the first sensor, and the exhaled breath blown into the second inlet is detected by the second sensor.

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