Airflow release device, and airflow release system

Abstract

To provide a technique for reducing release sound generated when discharging airflow in an airflow release device.SOLUTION: An airflow release device that includes an airflow release section for releasing airflow, a signal generation section that is electrically connected to the airflow release section and generates a drive signal to drive the airflow release section, has a cylindrical portion with a first end and a second end, a main body that has an airflow outlet for releasing the gas inside the cylindrical portion, and a speaker section provided with at least one of a first speaker with a first diaphragm as a vibration plate provided at the first end of the cylindrical portion with the first vibration plate side directed to the inside of the main body, and a second speaker with a second diaphragm as a vibration plate provided at the second end of the cylindrical portion with the second vibration plate side directed inward of the main body, wherein the signal generation section generates a drive signal by adding an acoustic signal to a fundamental wave signal with a single cycle of 300 Hz or less and inputs it to the airflow release section.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an air flow discharging device.

Background Art

[0002] Conventionally, a technique has been proposed to discharge air quality components such as aromatic components to a predetermined position, such as a vehicle driver, using the principle of an air cannon (see, for example, Patent Documents 1 to 5).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the techniques described in the above patent documents, since the principle of an air cannon is used, a discharge sound is generated when discharging air quality components. Therefore, for example, as described in Patent Document 5, when an air cannon is operated together with an image to give a sense of presence to a viewer of the image, the sense of presence may be impaired by the discharge sound.

[0005] However, in the above patent documents, a method for reducing the discharge sound during air quality component discharge has not been studied.

[0006] Therefore, an object of the present disclosure is to provide a technique for reducing the discharge sound generated during air flow discharge in an air flow discharging device.

Means for Solving the Problem

[0007] The present disclosure has been made to solve at least a part of the above-described problems and can be realized in the following forms.

[0008] (1) According to one aspect of the present disclosure, there is provided an airflow discharging device including an airflow discharging unit that discharges an airflow, and a signal generation unit that is electrically connected to the airflow discharging unit and generates a drive signal for driving the airflow discharging unit. The airflow discharging device includes a main body unit having a cylindrical portion having a first end and a second end, and an air outlet for discharging the gas inside the cylindrical portion, and a speaker unit including at least one of a first speaker having a first diaphragm as a diaphragm and provided at the first end of the cylindrical portion with the first diaphragm side facing the inside of the main body unit, and a second speaker having a second diaphragm as a diaphragm and provided at the second end of the cylindrical portion with the second diaphragm side facing the inside of the main body unit. The signal generation unit adds an acoustic signal to a fundamental wave signal having a single period of 300 Hz or less to generate the drive signal and inputs it to the airflow discharging unit.

[0009] According to this configuration, the signal generation unit adds an acoustic signal to a fundamental wave signal having a single period of 300 Hz or less to generate the drive signal and inputs it to the airflow discharging unit. Then, the diaphragm of the speaker unit vibrates based on the low-frequency fundamental wave signal, and the gas in the main body unit can be discharged from the air outlet. Further, since the drive signal includes an acoustic signal, environmental sounds such as music and voices can be output from the speaker unit. That is, according to the airflow discharging device having this configuration, an airflow can be discharged from the airflow discharging unit and at the same time environmental sounds can be output. Therefore, the airflow discharging sound can be masked by the environmental sounds. Further, airflow discharging can be performed together with acoustic stimulation, and tactile stimulation can be given without discomfort. That is, according to the airflow discharging device having this configuration, an airflow can be discharged from the airflow discharging unit and at the same time environmental sounds can be output. Therefore, the airflow discharging sound can be masked by the environmental sounds. Further, airflow discharging can be performed together with acoustic stimulation, and tactile stimulation can be given without discomfort.

[0010] Moreover, according to this configuration, by inputting a drive signal to a speaker, which is a general-purpose device, it is possible to simultaneously realize the above-described acoustic stimulation and air flow discharge. That is, since the device configuration can be composed of general-purpose components and the technology has high versatility, it can be easily applied, for example, in services using existing video and audio systems.

[0011] (2) For the air flow discharge device of the above form, when the volume of the space formed by the diaphragm and the main body portion when the diaphragm is not displaced is V (m 3 ) and the area of the air discharge port is A (m 2 ), and the single period of the fundamental wave signal is F (Hz), and the volume when the volume of the space becomes minimum due to the displacement of the diaphragm by the fundamental wave signal is V·Z (m 3 ) (Z is less than 1), the following (Equation 1) may be satisfied. [Number]

[0012] In this way, when the air of volume change V(1 - Z) is discharged from the discharge port of area A in half a cycle (1 / (2F) seconds) of the fundamental wave, the average velocity can be 0.1 m / s or more. Therefore, the tactile stimulation due to the air flow discharge can be made more perceptible.

[0013] (3) For the air flow discharge device of the above form, the signal generation unit may change the addition ratio of the acoustic signal for each time. In this way, for example, by changing the volume of the sound according to the video for each time, the sense of immersion can be enhanced more.

[0014] (4) For the air flow discharge device of the above form, an aromatic substance addition unit may be further provided near the air discharge port of the air flow discharge unit to add an aromatic substance to the air flow discharged from the air discharge port. In this way, a fragrance can be discharged together with the air flow.

[0015] (5) According to another aspect of the present disclosure, there is provided an airflow discharge system including a plurality of airflow discharge devices and a control unit configured to control the plurality of airflow discharge devices. In this airflow discharge system, the plurality of airflow discharge devices are the airflow discharge devices of the above aspect.

[0016] According to this configuration, since a plurality of airflow discharge devices are provided, the sense of presence can be enhanced by varying the airflow discharge timing or the sound of each airflow discharge device. Since the airflow discharge device is of the above aspect, environmental sound can be played along with the airflow discharge, and the airflow discharge sound can be masked by the environmental sound. Further, airflow discharge can be performed together with an acoustic stimulus, and a tactile stimulus can be given without a sense of incongruity.

[0017] (6) In the airflow discharge system of the above aspect, the control unit may vary the addition ratio of the acoustic signals for each of the plurality of airflow discharge devices. By doing so, for example, when the acoustic signal is a stereo signal, the sense of presence can be further improved by changing the addition ratio of the acoustic signals in the drive signals input to the airflow discharge device arranged on the right and the airflow discharge device arranged on the left, respectively.

[0018] Note that the present disclosure can be realized in various aspects, for example, in the form of a vehicle including an airflow discharge device, a planting including an airflow discharge device, an entertainment system including an airflow discharge device, and the like. It can be realized in the form of a vehicle including an airflow discharge device, a planting including an airflow discharge device, an entertainment system including an airflow discharge device, and the like.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0020] <First Embodiment> FIG. 1 is a functional block diagram showing the configuration of an air flow discharging device 1 as the first embodiment of the present disclosure. The air flow discharging device 1 is a device that discharges an air flow while flowing ambient sound based on an acoustic signal indicating ambient sound such as music and voice. The air flow discharging device 1 includes an air flow discharging part 100 that discharges an air flow, and a signal generation part that is electrically connected to the air flow discharging part 100, generates a drive signal for driving the air flow discharging part 100, and inputs it to the air flow discharging part 100.

[0021] FIG. 2 is an explanatory diagram conceptually showing the configuration of the air flow discharging part 100. FIG. 2(A) shows the overall configuration of the air flow discharging part 100, and FIG. 2(B) shows an enlarged view of part X in FIG. 2(A). As shown in FIG. 2(A), the air flow discharging part 100 includes a main body part 10 and a speaker part 50.

[0022] The main body part 10 has a cylindrical tubular part 12 having a first end 14 and a second end 16, and an air flow outlet 18 for discharging the gas inside the tubular part 12. In the present embodiment, the air flow outlet 18 is provided in the tubular part 12. In FIG. 2(A), the air flow outlet 18 is indicated by a broken line. The planar shape of the air flow outlet 18 is not particularly limited, and various shapes such as a circular shape, an elliptical shape, and a polygonal shape can be adopted. The tubular part 12 is a cylindrical shape with the axis L as the central axis, and the opening shapes of the first end 14 and the second end 16 of the tubular part 12 are circular shapes having substantially the same diameter as the planar shape of the first diaphragm 222 described later. Here, the axis L is the center line that becomes the axis of the tubular part 12.

[0023] The speaker unit 50 of this embodiment has two speakers, a first speaker 20 and a second speaker 30. The first speaker 20 has a vibrating portion 22 and a driving portion 24. Similarly, the second speaker 30 has a vibrating portion 32 and a driving portion 34.

[0024] As shown in FIG. 2(B), the vibrating portion 22 includes a first diaphragm 222, a voice coil 224, and a bobbin 226. The voice coil 224 is wound around the bobbin 226, and the bobbin 226 is fixed to the first diaphragm 222. The first diaphragm 222 of this embodiment is in a cone shape (conical shape). In other embodiments, the diaphragm may be in other shapes such as a dome shape.

[0025] The driving portion 24 includes a frame portion 244 that supports the outer periphery of the first diaphragm 222, and a magnet 242 fixed to the frame portion 244. By attaching the frame portion 244 to the inner wall of the cylindrical portion 12 by the joint portion 40, the first speaker 20 is provided at the first end 14 of the cylindrical portion 12 with the first diaphragm 222 side facing the inside of the main body portion 10. Also, the outer periphery of the diaphragm 222 is attached to the inner wall of the cylindrical portion 12 by the joint portion 40, and the first end 14 of the main body portion 10 is closed by the first diaphragm 222. A slit SL is provided in the frame portion 244, and the outside of the diaphragm 222 (the left side in FIG. 2) is open to the atmosphere.

[0026] The magnet 242 has an annular planar shape, and a bobbin 226 around which a voice coil 224 is wound is arranged in a state of being inserted into the magnet 242. A signal line 210 is connected to the voice coil 224, and a current corresponding to a drive signal input from the signal generation unit 200 flows through the voice coil 224. Then, due to the magnet 242, a force corresponding to the current flowing through the voice coil 224 is applied to the voice coil 224. Since the magnet 242 is fixed to the frame portion 244 and does not move, the voice coil 224 vibrates in the direction of the axis L together with the bobbin 226. Since the bobbin 226 is fixed to the first diaphragm 222, the first diaphragm 222 vibrates in the direction of the axis L together with the bobbin 226. In FIG. 2(B), the vibration direction is illustrated by a white arrow. Here, the axis L passes through the center of the first diaphragm 222 and the center of the second diaphragm.

[0027] The second speaker 30 has the same configuration as the first speaker 20. That is, the vibrating portion 32 of the second speaker 30 has the same configuration as the vibrating portion 22 of the first speaker 20, and the driving portion 34 has the same configuration as the driving portion 24 of the first speaker 20. When distinguishing between the first speaker 20 and the second speaker 30, the diaphragm of the second speaker 30 is referred to as the second diaphragm.

[0028] The second speaker 30 is provided at the second end 16 of the cylindrical portion 12 with the second diaphragm side facing the inside of the main body portion 10. That is, the first diaphragm 222 of the first speaker 20 and the second diaphragm of the second speaker are provided to face each other. The second end 16 of the main body portion 10 is closed by the second diaphragm. In the following description, when not distinguishing between the first diaphragm 222 and the second diaphragm, it is simply referred to as the "diaphragm".

[0029] The signal generation unit 200 adds an acoustic signal to a fundamental wave signal with a single period of 300 Hz or less to generate a drive signal for driving the airflow discharge unit 100, and inputs it to the airflow discharge unit 100. The signal generation unit 200 includes, for example, a signal processing device and an amplifier. The signal processing device reads a sound source stored in a CD, memory, etc., converts it into an electrical signal, and generates an acoustic signal. In the signal generation unit 200, the signal processing device adds the acoustic signal to the fundamental wave signal that the signal processing device has in advance to generate a drive signal, and the amplifier amplifies the drive signal and inputs it to the airflow discharge unit 100. The signal generation unit 200 is composed of a microcomputer including a CPU, ROM, RAM, etc. and its peripheral circuits, and performs various calculations and processes based on a program stored in the ROM, and functions as a signal processing device and an amplifier. Here, the computer includes a PLC (Programmable Logic Controller).

[0030] The signal generation unit 200 may add the acoustic signal to the fundamental wave signal as it is, or may add the acoustic signal at a predetermined ratio. The signal generation unit 200 may keep the addition ratio of the acoustic signal constant, or may change it, for example, for each speaker or for each time. For example, the addition ratio of the acoustic signal may be different between the drive signal input to the first speaker 20 and the drive signal input to the second speaker 30. The addition ratio of the acoustic signal may be determined experimentally in advance, for example, with the ratio of the fundamental wave signal as α and the ratio of the acoustic signal as β, α + β = 1, and changing the value of α to obtain the range of α that can mask the airflow discharge sound. Also, the addition ratio may be changed based on the loudness level of the acoustic signal. When changing the addition ratio based on the loudness level of the acoustic signal included in the video content, for example, even in the case of a large acoustic signal generated in a scene where a monster appears in the video, the airflow can be discharged while maintaining the masking effect, thereby enhancing the sense of presence more. The addition ratio to the acoustic signal may be adjusted according to the user's preference, etc. by further providing an input interface to the signal generation unit in FIG. 1.

[0031] The acoustic signal added by the signal generation unit 200 to the fundamental wave signal may be input from outside the airflow discharge device 1. For example, an acoustic signal input from a so-called player that reads a sound source stored in a CD, a memory, etc. and converts it into an electrical signal to generate an acoustic signal may be used.

[0032] FIG. 3 is an explanatory diagram conceptually showing the principle of airflow discharge. In the example shown in FIG. 3, the same drive signal is input to the first speaker 20 and the second speaker 30. In a general speaker, the displacement of the diaphragm due to a low-frequency input is dominant. At low frequencies, the amplitude of the diaphragm is constant and large, and as the frequency increases, the amplitude of the diaphragm decreases. That is, without the fundamental wave signal, only with the acoustic signal, it is not possible to discharge the airflow using a speaker.

[0033] In the airflow discharge unit 100, due to the amplitude of the diaphragm of the speaker unit 50, the volume V of the space S formed by the diaphragm and the main body unit 10 S varies, and a pressure change in the space S occurs. When the pressure in the space S becomes higher than the atmospheric pressure, the gas (air) in the space S is discharged. Conversely, when the pressure in the space S becomes lower than the atmospheric pressure, air flows in from outside the airflow discharge unit 100.

[0034] FIG. 3(A) shows the state when the displacement of the diaphragm of the airflow discharge unit 100 is minimum. At this time, the volume V of the space S S is V, and the pressure is lower than the atmospheric pressure. Therefore, gas flows into the airflow discharge unit 100 from outside the airflow discharge unit 100 through the airflow outlet 18. In FIG. 3, the flow of gas is conceptually shown by arrows.

[0035] FIG. 3(B) shows the state in which the two diaphragms in the airflow discharge unit 100 are displaced inward in the direction of the axis L (the direction in which the first diaphragm 222 and the second diaphragm approach each other), and the volume V of the space S S is reduced. In FIG. 3(B), the movement of the diaphragm is shown by a white arrow. When the volume V of the space S S is reduced, the pressure in the space S becomes higher than the atmospheric pressure, and the gas (air) in the airflow discharge unit 100 is discharged to the outside through the airflow outlet 18.

[0036] Figure 3(C) shows the state when the displacement of the diaphragm is maximum in the airflow discharge unit 100. At this time, the two diaphragms are closest to each other, and the volume V of the space S S is at its minimum. Also at this time, the gas in the airflow discharge unit 100 is discharged to the outside through the air discharge port 18. The airflow discharge flow rate in Figure 3(C) is larger than that shown in Figure 3(B).

[0037] The volume V of the space S at this time S is not particularly limited, but the volume V S is set to V·Z (Z is less than 1), the area of the air discharge port 18 is A (m 2 ), and when the single period of the fundamental wave signal is F (Hz), it is preferable to satisfy the following (Equation 1).

Equation

[0038] By doing so, the average velocity when the air inside the volume change amount V(1 - Z) is discharged from the discharge port with an area A within a half cycle (1 / (2F) seconds) of the fundamental wave can be made 0.1 m / s or more. Therefore, the tactile stimulus caused by the airflow discharge can be made more perceptible.

[0039] Figure 3(D) shows the state where the two diaphragms in the airflow discharge unit 100 are displaced outward in the axial direction L (the direction in which the first diaphragm 222 and the second diaphragm are separated), and the volume of the space formed by the diaphragm and the main body 10 expands. In Figure 3(D), the movement of the diaphragm is indicated by a white arrow. When the above volume expands, the gas outside the airflow discharge unit 100 flows into the airflow discharge unit 100 through the air discharge port 18. The airflow inflow rate in Figure 3(D) is smaller than that shown in Figure 3(A) shown.

[0040] As shown in FIG. 3, in the airflow discharging unit 100, the displacements of the two diaphragms are repeated. In the airflow discharging unit 100, the displacement of the diaphragm repeats a plurality of cycles with the sequence of FIG. 3(A) → (B) → (C) → (D) as one cycle. Due to the displacements of the two diaphragms, the airflow discharge from the airflow discharging unit 100 is repeatedly performed.

[0041] FIG. 4 is an explanatory diagram conceptually showing an example of the generation of a drive signal. As shown in the figure, weights are assigned to the values at each time of the fundamental wave signal A (low-frequency signal) and the acoustic signal B (masking sound source), and they are added. At this time, a composite acoustic signal obtained by multiplying the acoustic signal B by (1-α) times and adding it to α times of the fundamental wave signal A is used as the drive signal. As α, any value greater than 0 and less than 1 can be set. The larger the value of α, the larger the airflow discharged from the airflow discharging device 1 and the smaller the ambient sound.

[0042] The fundamental wave signal A' (the signal A' which is the fundamental wave signal A having periodicity and is multiplied by the gain α (<1)) and the masking signal B' (the signal B' which is the acoustic signal B such as natural ambient sound and is multiplied by the gain (1-α)) are added to generate a composite acoustic signal (FIG. 4). At this time, the maximum amplitudes of the fundamental wave signal A and the acoustic signal B are the same. When generating the composite acoustic signal, as described above, α may be changed by time division. Also, the frequency of the fundamental wave signal A which is a low-frequency signal may be set to, for example, 40 Hz corresponding to the γ wave of brain activity for which a therapeutic effect on dementia is expected.

[0043] FIG. 5 is a diagram showing the relationship between frequency and sound pressure threshold in the equal-loudness curve (ISO226). The airflow discharging device 1 utilizes the auditory characteristic of humans that a single-cycle fundamental wave signal below 300 Hz sounds smaller compared to acoustic signals of higher frequencies. The equal-loudness contour is a map of frequency and sound pressure connected as contour lines where a person feels the same loudness. In order to feel the same magnitude at a lower frequency compared to a higher frequency, a larger sound pressure is required. In FIG. 5, as shown by the dashed line, at the perception threshold in the equal-loudness curve, there is no change at frequencies higher than 300 Hz, and the sensitivity to sound pressure decreases below 300 Hz.

[0044] In a general speaker, the amplitude of the diaphragm of the speaker remains constant up to several tens of Hz and decreases when it becomes higher than that. The acceleration of the diaphragm involved in sound pressure is low below several tens of Hz in the sound pressure frequency characteristics and often becomes almost constant when it becomes higher than that. Therefore, even when the same amplitude signal is input, the sound pressure level in the low frequency range often decreases. Furthermore, in the perception threshold in the equal loudness curve (Figure 5) representing the way people feel, as described above, there is no change at frequencies higher than 300 Hz, and the sensitivity to sound pressure decreases below 300 Hz. Therefore, it can be said that the sound pressure change caused by a signal below 300 Hz is more likely to be masked by the sound pressure change caused by a frequency higher than that.

[0045] As described above, according to the air flow discharging device 1 of the present embodiment, the signal generation unit 200 adds an acoustic signal to a fundamental wave signal of a single cycle below 300 Hz to generate a drive signal and inputs it to the air flow discharging unit 100. Then, the diaphragm of the speaker unit 50 vibrates based on the low frequency fundamental wave signal, and the gas in the main body unit 10 can be discharged from the air flow discharge port 18. Further, since the drive signal includes an acoustic signal, environmental sounds such as music and voices can be flowed from the speaker unit 50. That is, according to the air flow discharging device 1 having this configuration, air flow can be discharged from the air flow discharging unit 100 and at the same time environmental sounds can be flowed. Therefore, the air flow discharging sound can be hidden (masked) by the environmental sound. In addition, air flow discharging can be performed together with acoustic stimulation, and tactile stimulation can be given without discomfort.

[0046] Further, according to the air flow discharging device 1, by inputting the drive signal to a speaker which is a general-purpose device acoustic stimulation and air flow discharging can be realized simultaneously. That is, since the air flow discharging device 1 can be configured with general-purpose products and has high versatility, it can be easily applied, for example, also in services using existing video and audio systems.

[0047] <Second Embodiment> FIG. 6 is an explanatory diagram conceptually showing the configuration of the airflow discharge unit 100A of the second embodiment. The difference between the airflow discharge unit 100A of this embodiment and the airflow discharge unit 100 of the first embodiment is that the speaker unit 50A does not include the second speaker 30. In other words, in the airflow discharge unit 100A, the speaker unit 50A includes one speaker (the first speaker 20). In the embodiments described below, the same components as those of the airflow discharge unit 100 of the first embodiment are denoted by the same reference numerals, and reference is made to the preceding description.

[0048] In the airflow discharge unit 100A, the main body unit 10A has a wall surface portion 17 at the second end 16 of the cylindrical portion 12. And, in the airflow discharge unit 100A, unlike the airflow discharge unit 100 of the first embodiment, the air discharge port 18 is provided in the wall surface portion 17. The planar shape of the air discharge port 18A is circular, and its center is on the axis L.

[0049] In the airflow discharge unit 100A, when the vibrating portion 22 of the first speaker 20 is displaced, the volume of the space formed by the first diaphragm and the main body unit 10A changes, and airflow is discharged from the air discharge port 18A, and at the same time, sound waves flow. Even if the airflow discharge unit 100A of this embodiment is used in place of the airflow discharge unit 100 in the airflow discharge device 1 of the first embodiment, the same effects as those of the airflow discharge device 1 of the first embodiment can be obtained.

[0050] The airflow discharge unit 100A of the second embodiment has a configuration including one speaker, and since the configuration is simpler, it can be easily applied to an existing system or the like.

[0051] <Third Embodiment> FIG. 7 is an explanatory diagram conceptually showing the configuration of the airflow discharge device 1B as the third embodiment of the present disclosure. The difference between the airflow discharge device 1B of this embodiment and the airflow discharge device 1 of the first embodiment is that it includes an aromatic substance addition unit 300.

[0052] The aromatic substance addition unit 300 is provided near the air outlet 18 (Fig. 2) of the air flow discharge unit 100, and adds an aromatic substance to the air flow discharged from the air outlet 18. Here, "nearby" means close enough to add a directional substance to the air flow discharged from the air outlet 18. As the aromatic substance, for example, an aromatic component obtained by volatilizing a fragrance, an aroma component obtained from essential oil extracted from plants, etc. can be used. The aromatic substance addition unit 300 includes a storage chamber that forms a space in which a predetermined aromatic substance is stored in advance, and a nozzle for discharging the aromatic substance. The nozzle of the aromatic substance addition unit 300 is open toward the air outlet 18 of the air flow discharge unit 100, and the aromatic substance discharged from the nozzle of the aromatic substance addition unit 300 is mixed with the discharged gas (air) by the air flow discharged from the air outlet 18 of the air flow discharge unit 100. As a result, a gas having an aroma can be sent. The aromatic substance addition unit 300 may be provided inside the main body 10 of the air flow discharge unit 100, or may be provided outside the main body 10. Note that the aromatic substance addition unit 300 may continuously discharge the aromatic substance, or may discharge it at a predetermined timing. Further, the signal generation unit 200 may control the aromatic substance addition unit 300 to synchronize the discharge of the air flow and the discharge of the directional substance in the air flow discharge unit 100.

[0053] As described above, according to the air flow discharge device 1B of the present embodiment, an air flow having an aroma can be conveyed in accordance with sound such as music. When the addition ratio of the fundamental wave signal corresponding to the loudness level of the acoustic signal is adopted, the strength of the air flow is proportional to the loudness of the sound. The direction of the sound and the air flow coincide, and it is also possible to release the aroma accompanying the shaking of an object by the discharged air flow or the shaking from an object such as a herb, and to provide a situation close to the stimulating experience experienced in daily life. Further, for example, by using and controlling a video device in combination, an air flow having an aroma can be conveyed in accordance with the video and music.

[0054] Also, similar to the air flow discharge device 1 of the first embodiment, since the discharge sound of the air flow can be hidden, olfactory stimulation and tactile stimulation can be given without discomfort together with the acoustic stimulation.

[0055] <Fourth Embodiment> FIG. 8 is an explanatory diagram conceptually showing the configuration of an airflow discharge system 1000 as a fourth embodiment of the present disclosure. The airflow discharge system 1000 of the present embodiment includes an airflow discharge device 1L, an airflow discharge device 1R, and a control unit 2 that controls the airflow discharge devices 1L and 1R. The airflow discharge devices 1L and 1R of the present embodiment have the same configuration as the airflow discharge device 1 of the first embodiment.

[0056] The control unit 2 is a computer including a ROM, a RAM, and a CPU, and controls the entire airflow discharge system 1000. Here, the computer includes a PLC (Programmable Logic Controller). For example, when the airflow discharge device 1L is arranged on the left side and the airflow discharge device 1R is arranged on the right side of the user, and the acoustic signal is a stereo signal, the control unit 2 may control the airflow discharge device 1L and the airflow discharge device 1R to set different addition ratios respectively. That is, α (FIG. 4) in the first embodiment may be set to different values for the airflow discharge device 1L and the airflow discharge device 1R respectively. In this way, the sense of presence can be further improved. Note that the control unit 2 may control the airflow discharge device 1L and the airflow discharge device 1R to add the acoustic signal at the same addition ratio. Also, the control unit 2 may control to generate the same drive signal for each of the airflow discharge devices 1L and 1R.

[0057] In the airflow discharge system 1000, similar to the first embodiment, the acoustic signal may be input from outside the airflow discharge device 1. For example, the control unit 2 may function as a so-called player that reads a sound source stored in a CD, a memory, etc. and converts it into an electrical signal to generate an acoustic signal. Also, an acoustic signal generated outside the airflow discharge system 1000 may be input to the control unit 2. Also, an acoustic signal generated outside the airflow discharge system 1000 may be input to each of the airflow discharge devices 1L and 1R.

[0058] <Example of Product Form> The airflow discharge device 1 and the like of the above embodiment can be realized, for example, in the following product forms. (1) Implementation on a driving assistance system interface by arranging the airflow discharge device 1 inside the seat headrest of a vehicle. Wind and fragrance according to the control from the driving assistance system can be delivered to the driver together with sound. (2) Implementation on planting or the like in a relaxation room. For example, by arranging the airflow discharge device 1 near a plant in a pot, the leaves and flowers of the planting can be swayed by the airflow discharged together with sound, and the fragrance of the plant can be delivered to the user. (3) Implementation on a vase or a planter on an airplane. The leaves and flowers of the planting can be swayed by the airflow discharged together with sound by the airflow discharge device 1, and the fragrance of the plant can be delivered to the user. For example, it contributes to relaxation during work, study, etc. (4) Implementation on an entertainment system. By arranging the airflow discharge device 1 inside the seat sheet of a theater or the like, wind and fragrance according to the scene can be delivered from the seat speaker system to the theater-goers.

[0059] <Modification example of the present embodiment> The present disclosure is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist thereof. For example, the following modifications are also possible.

[0060] ·In the above embodiment, an example in which the cylindrical portion 12 is linear (not bent) is shown, but the cylindrical portion may be bent. For example, it may be deformed according to the shape of the place to be arranged. Further, an exterior case containing the airflow discharge device 1 may be further provided.

[0061] ·In the above embodiment, an example in which an aromatic substance is added to the discharged airflow is shown, but for example, a humidity component obtained by volatilizing moisture, an oxygen component, a collagen component, an anti-allergen component, an ion component, a cold air component, a warm air component, etc. may be added. By doing so, effects corresponding to each of the substances to be added can be achieved.

[0062] ·In the above embodiment, an example was shown in which the ratio was set so that the sum of the ratio of the fundamental wave signal and the ratio of the acoustic signal was 1. However, the ratio of each signal is not limited to the above embodiment. For example, the ratio of the fundamental wave signal may be 1 and the ratio of the acoustic signal may be 0.5, and the sum may be 1.5.

[0063] As described above, the present aspect has been described based on the embodiment and the modification example. However, the embodiments of the above-described aspects are for facilitating the understanding of the present aspect and do not limit the present aspect. The present aspect can be changed and improved without departing from the gist and the scope of the claims, and equivalents thereof are included in the present aspect. Further, if the technical features are not described as essential in this specification, they can be deleted as appropriate.

[0064] The present disclosure can also be realized in the following forms. [Application Example 1] An air flow discharging device having an air flow discharging portion that discharges an air flow, and a signal generating portion that is electrically connected to the air flow discharging portion and generates a driving signal for driving the air flow discharging portion, wherein the air flow discharging portion has a main body portion having a cylindrical portion having a first end and a second end, and an air flow outlet for discharging the gas inside the cylindrical portion, and includes at least one of a first speaker having a first diaphragm and provided at the first end of the cylindrical portion with the first diaphragm side facing the inside of the main body portion, and a second speaker having a second diaphragm and provided at the second end of the cylindrical portion with the second diaphragm side facing the inside of the main body portion, and the signal generating portion adds an acoustic signal to a fundamental wave signal having a single period of 300 Hz or less to generate the driving signal and inputs it to the air flow discharging portion. Air flow discharging device. [Application Example 2] The air flow discharging device according to Application Example 1, When the diaphragm is not displaced, the volume of the space formed by the diaphragm and the main body is V (m 3 ), the area of the air flow outlet is A (m 2 ), the single period of the fundamental wave signal is F (Hz), and when the volume of the space becomes minimum due to the displacement of the diaphragm by the fundamental wave signal, the volume is V·Z (m 3 ) (Z is less than 1), an air flow discharging device satisfying the following (Equation 1). Air flow discharging device. [Numerical formula] [Application Example 3] The air flow discharging device according to claim 1 or Application Example 2, wherein the signal generation unit changes the addition ratio of the acoustic signals for each time. Air flow discharging device. [Application Example 4] The air flow discharging device according to any one of Application Examples 1 to 3, wherein an aromatic substance adding unit that is provided near the air flow outlet of the air flow discharging unit and adds an aromatic substance to the air flow discharged from the air flow outlet is further provided. further comprising Air flow discharging device. [Application Example 5] An air flow discharging system including a plurality of air flow discharging devices and a control unit that controls the plurality of air flow discharging devices, wherein the plurality of air flow discharging devices are the air flow discharging devices according to any one of claims 1 to 4. Air flow discharging system. [Application Example 6] The air flow discharging system according to Application Example 5, wherein the control unit makes the addition ratio of the acoustic signals different for each of the plurality of air flow discharging devices. Air flow discharging system. [Explanation of reference numerals]

[0065] 1, 1B, 1L, 1R... Air flow discharging device 2... Control unit 10, 10A... Body part 12... Cylindrical part 14... First end 16... Second end 17... Wall surface part 18, 18A... Air flow outlet 20... First speaker 22, 32... Vibration part 24, 34... Driving part 30... Second speaker 40... Joint part 50, 50A... Speaker part 100, 100A... Air flow discharge part 200... Signal generation part 210... Signal line 222... First diaphragm 224... Voice coil 226... Bobbin 242... Magnet 244... Frame part 300... Aromatic substance addition part 1000... Air flow discharge system L... Axis S... Space SL... Slit

Claims

1. An air flow discharging device having an air flow discharging portion that discharges an air flow, and a signal generating portion that is electrically connected to the air flow discharging portion and generates a drive signal for driving the air flow discharging portion, wherein the air flow discharging portion comprises a main body portion having a cylindrical portion having a first end and a second end, and an air flow outlet for discharging the gas inside the cylindrical portion, a speaker portion including at least one of a first speaker having a first diaphragm provided at the first end of the cylindrical portion with the first diaphragm side facing the inside of the main body portion, and a second speaker having a second diaphragm provided at the second end of the cylindrical portion with the second diaphragm side facing the inside of the main body portion, and the signal generating portion adds an acoustic signal to a fundamental wave signal of a single cycle of 300 Hz or less to generate the drive signal and inputs it to the air flow discharging portion, an air flow discharging device.

2. The air flow discharging device according to claim 1, When the volume of the space formed by the diaphragm and the main body when the diaphragm is not displaced is V (m ３ ), the area of the air outlet is A (m ２ ), the single period of the fundamental wave signal is F (Hz), and the volume when the volume of the space becomes minimum due to the displacement of the diaphragm by the fundamental wave signal is V·Z (m ３ ) (Z is less than 1), the following (Equation 1) is satisfied: an air flow discharging device. [Number 4]

3. The air flow discharging device according to claim 1, wherein the signal generating portion changes the addition ratio of the acoustic signal for each time, an air flow discharging device.

4. The air flow discharging device according to claim 1, further comprising an aromatic substance adding portion provided near the air flow outlet of the air flow discharging portion and adding an aromatic substance to the air flow discharged from the air flow outlet, an air flow discharging device.

5. An air flow discharging system comprising a plurality of air flow discharging devices and a control portion for controlling the plurality of air flow discharging devices, wherein the plurality of air flow discharging devices are the air flow discharging devices according to any one of claims 1 to 4, an air flow discharging system.

6. The air flow discharging system according to claim 5, wherein the control portion makes the addition ratio of the acoustic signal different for each of the plurality of air flow discharging devices, an air flow discharging system. ​

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