JP2006055741A - Jet flow generator and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jet flow generator that is capable of effectively radiating heat emitted from a heating element while suppressing the generation of noise, and to provide an electronic apparatus which mounts the same. <P>SOLUTION: The jet flow generator 1 has nozzles 3a and 2b and is provided with a box 2 including a cooling medium in the inner parts 2a and 2b, a vibration plate 5 which is arranged in the box 2 and which discharges the cooling medium alternatively through the nozzles 3a and 3b so as to be synchronized with the vibration by vibrating the cooling medium, and a drive mechanism 10 which is arranged in the box 2, which has a symmetrical structure to the vibration plate in the vibration direction R of the vibration plate 5 and which drives the vibration of the vibration plate 5. The generation of the noise can be consequently suppressed because the drive mechanism 10 has the symmetrical structure to the vibration plate 5 and, as a result, the symmetrical aerodynamic force characteristics to the vibration plate 5 in the box 2 is obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a jet generating device that generates a jet to cool a heating element such as an electronic component, and an electronic apparatus equipped with the jet generating device.

  Conventionally, an increase in the amount of heat generated from a heating element such as an IC (Integrated Circuit) associated with high performance of a PC (Personal Computer) has been a problem, and various heat radiation technologies have been proposed or commercialized. Yes. As a heat dissipation method, for example, there is a method in which a heat dissipation fin made of a metal such as aluminum is brought into contact with the IC, and heat from the IC is conducted to the fin to dissipate heat. Also, there is a method of dissipating heat by forcibly removing, for example, warm air in a PC housing by using a fan and introducing ambient low-temperature air around the heating element. Alternatively, there is a method of forcibly removing the warm air around the radiating fin by the fan while using the radiating fin and the fan together to increase the contact area between the heating element and the air with the radiating fin.

  However, in such forced convection of air by the fan, there is a problem that a temperature boundary layer on the surface of the fin occurs on the downstream side of the radiating fin, and heat from the radiating fin cannot be efficiently taken. In order to solve such a problem, for example, it is possible to increase the wind speed of the fan to make the temperature boundary layer thinner. However, increasing the number of rotations of the fan in order to increase the wind speed has a problem in that noise from the bearing portion of the fan or noise due to wind noise caused by the wind from the fan occurs.

As a method of destroying the temperature boundary layer and efficiently releasing the heat from the radiation fins to the air, there is a method using a synthetic jet. This is to cause air movement generated by a reciprocating piston or the like provided in the chamber to be ejected from a hole provided at one end of the chamber. The air ejected from the hole is called a synthetic jet, which promotes air mixing and causes destruction of the temperature boundary layer, and can dissipate heat more efficiently than conventional forced convection by a fan (for example, Patent Document 1). reference.).
US Pat. No. 6,123,145 (FIG. 8 etc.)

  However, in the technique described in Patent Document 1, air vibration due to the reciprocating motion of the piston propagates as a sound wave, and noise due to this sound becomes a problem. In addition, since the amount of heat generated by the recent increase in the clock frequency of ICs is steadily increasing, for example, in order to destroy the temperature boundary layer formed near the heat radiating fins due to the heat generation, You have to send more air towards you. Then, the FIG. Even in a device that vibrates the vibrating membrane and ejects air, such as the device shown in 1A and the like, the amplitude of the vibration must be increased to increase the amount of air ejected. Therefore, when the vibration frequency of the diaphragm is in the audible band, the noise of the diaphragm is also a problem.

  In view of the circumstances as described above, an object of the present invention is to provide a jet generating device capable of effectively radiating heat generated from a heating element while suppressing generation of noise as much as possible, and an electronic apparatus equipped with the jet generating device. There is to do.

  In order to achieve the above object, a jet flow generating apparatus according to the present invention has a first and a second opening, a casing containing a gas inside, a casing disposed in the casing, and a vibration to the gas. And a vibration plate that alternately discharges the gas as a pulsating flow through the first and second openings so as to be synchronized with the vibration, and a vibration direction of the vibration plate. And a drive mechanism that has a symmetrical structure with respect to the diaphragm and drives the vibration of the diaphragm.

  In the present invention, the diaphragm is vibrated by the drive of the drive mechanism, so that the gas is alternately discharged as a pulsating flow from the inside of the housing through the first and second openings. By alternately discharging gas in this way, the frequency of the sound wave generated from the opening becomes equal, and the phases become opposite and weaken. Thereby, noise is reduced. In addition, since the drive mechanism has a target structure with respect to the diaphragm, aerodynamic characteristics symmetrical to the diaphragm can be obtained in the housing. As a result, the amplitudes of the sound waves generated from the first and second openings are equalized, contributing to the weakening of the respective sound waves, and further reducing noise.

  In the present invention, examples of the gas include air, but other gases may be used. A plurality of first and second openings may be provided. In the case where a plurality of openings are provided in this manner, it is preferable that the number of the first openings and the number of the second openings be equal in order to reduce noise. As the drive mechanism, for example, an electromagnetic drive can be used, but in addition, piezoelectric drive or electrostatic drive may be used. The same applies hereinafter.

  According to one form of this invention, the said diaphragm is flat form. Thereby, since a diaphragm becomes a symmetrical shape in the direction to vibrate, a noise can be reduced.

  According to an aspect of the present invention, the diaphragm includes a first surface that is substantially perpendicular to the direction of vibration, and a second surface that faces the first surface, and the drive mechanism includes: The first actuator disposed on the first surface side and the second actuator disposed on the second surface side, driven in synchronization with the first actuator, and having the same structure as the first actuator Actuator. By providing two actuators in this manner, symmetry in the vibration direction can be ensured, a large driving force can be obtained, and the amount of gas discharged can be increased.

  According to an aspect of the present invention, the casing has an inner wall, and the jet flow generating device is attached to the outer periphery of the diaphragm, and is attached to the inner wall and includes a support member that supports the diaphragm. In addition. By directly attaching the diaphragm to the inner wall of the housing via the support member, for example, the structure is simplified compared to the case where a speaker-type vibration device having a frame is provided in the housing, the size of the jet flow generating device is reduced, Cost reduction can be achieved. In addition, compared with the case where there is such a frame, when there is no frame as in the present invention, the aerodynamic characteristics are improved.

  According to one form of this invention, the shape of the outer periphery of the said diaphragm and the shape in the circumferential direction of the said inner wall in the position in which the said supporting member was attached are substantially the same. Thereby, when a diaphragm vibrates, the vibration by the largest area can be given with respect to the gas contained in the housing | casing. Accordingly, the flow rate from each opening is increased accordingly, and the cooling efficiency can be improved.

  According to an aspect of the present invention, the drive mechanism includes a stator, an internal space in which at least a part of the stator enters and exits when operated, and a flow hole through which the gas communicating with the internal space can flow. And a cylindrical movable member connected to the diaphragm. In the present invention, the movable member operates, and the stator enters and exits the internal space by relative movement between the stator and the movable member. When there is no flow hole, the stator enters the internal space, for example, the volume of the chamber on the side where the volume is to be reduced is increased by the bending of the diaphragm, and the volume change of the chamber cancels each other and the efficiency is poor. Become. However, according to the present invention, since the flow hole is provided, the gas in the internal space can escape to the outside of the movable member through the flow hole, so that such a problem can be solved. In the present invention, for example, an electromagnetic drive mechanism can be used as the drive mechanism. For example, although a coil is wound around a cylindrical movable member, the present invention is not limited thereto, and a coil may be provided on the stator.

  According to an aspect of the present invention, the movable member has a bottom portion provided so that the flow hole faces the diaphragm, and the driving mechanism includes the bottom portion of the movable member, the diaphragm, Having a rod to connect. When the rod is provided, since the bottom portion of the movable member and the diaphragm are separated from each other, a flow hole may be provided in the bottom portion.

  According to an aspect of the present invention, the diaphragm is erected so as to be along the direction of vibration, and is provided on the opposite side of the first end and the first end in the vibration direction. The jet flow generating device includes a first support member that supports the first end, and a second support member that supports the second end. Is further provided. Thus, by supporting the side wall by the first support member and the second support member arranged in the vibration direction, it is possible to prevent lateral vibration of the diaphragm and obtain stable vibration. Further, by suppressing the lateral vibration, for example, when the drive mechanism is of an electromagnetic drive, it is possible to make it difficult for the stator and the movable member to collide. Thus, by making it hard to collide, the clearance gap between a stator and a movable member can be narrowed, and the magnetic field concerning a coil can be strengthened. As a result, the drive mechanism can efficiently obtain a driving force. Furthermore, by making it hard to collide, it is possible to suppress high-order mode vibrations and reduce noise.

  According to one form of this invention, the said diaphragm has a side wall standingly arranged so that the direction of a vibration may be met, and the said jet flow generator supports the said side wall so that a slide is possible in the said vibration direction. A support member is further provided. Thereby, since the support area of the side wall which a bearing member supports can be enlarged, the horizontal vibration of a diaphragm can be prevented and the stable vibration can be obtained.

  According to an aspect of the present invention, the lubricant further includes a lubricant interposed between the side wall and the support member. Thereby, a diaphragm can vibrate smoothly and the airtightness between the two chambers formed by partitioning with the diaphragm in the housing can be enhanced. The lubricant may be solid or fluid.

  According to one aspect of the invention, the lubricant is a magnetic fluid. Thereby, for example, if the side wall and the support member are magnetic bodies, the lubricant can be easily held.

  According to an aspect of the present invention, the casing has an inner wall, and the diaphragm is erected so as to follow a vibration direction, and is supported by the inner wall so as to be slidable in the vibration direction. Have In this way, the side wall of the diaphragm is in direct sliding contact with the inner wall of the housing, so that the jet flow generating device can be downsized as compared with the case where the support member that supports the side wall is provided as described above. Also, the aerodynamic characteristics are improved as compared with the case where there is a support member. Also in the present invention, a lubricant may be provided between the side wall and the inner wall as in the case of the support member.

  According to one aspect of the present invention, the jet flow generating device is wired so as to be attached to at least the support member and supporting the diaphragm on the outer periphery of the diaphragm, and supplies power to the drive mechanism. The conductor is further provided. Thereby, disconnection of a conducting wire can be suppressed compared with the case where a conducting wire is wired in the air. The conducting wire may be attached to the diaphragm.

  According to one form of this invention, the said conducting wire is wired helically along the circumference | surroundings of the said diaphragm. Even if the conductor is attached to the diaphragm and the support member and is configured to move integrally with the diaphragm and the support member, for example, the conductor is in the direction in which the deformation amount of the support member is large, that is, from the center of the diaphragm to the outside. When the wiring is routed along the direction toward the wire, there is a possibility that a large stress is applied to the conducting wire and the wire is broken. However, in the present invention, since the wiring is spirally formed along the periphery of the diaphragm, the stress applied to the conducting wire can be reduced and disconnection can be prevented.

  According to one form of this invention, the said conducting wire may be embed | buried under the said supporting member. By burying the conducting wire, a highly reliable vibration device can be realized. Further, when manufacturing the vibration device, assembly such as soldering of the conductive wire is not necessary, and the cost can be reduced.

  According to one form of this invention, the said supporting member has a groove | channel formed in the spiral shape along the circumference | surroundings of the said diaphragm, and the said conducting wire is wired along the said groove | channel. Thereby, when manufacturing a jet flow generator, the wiring to the support member becomes easy.

  According to an aspect of the present invention, the jet flow generating device includes a first groove spirally formed on the first surface side along the periphery of the diaphragm, and the first groove includes a ridge line. A second groove spirally formed on the second surface side, and a support member for supporting the diaphragm on the outer periphery of the diaphragm, and wiring along the first groove And a first conductor for supplying power to the first actuator, and a second conductor for supplying power to the second actuator, which is wired along the second groove. That is, in the present invention, the support member has a bellows shape. Wiring can be performed using the first and second grooves on both surfaces (the first surface side and the second surface side) of the bellows-like support member.

  An electronic device according to the present invention has a heating element, a housing having first and second openings, and a gas contained therein, and is disposed in the housing to give vibration to the gas. A vibration plate that alternately discharges the gas as a pulsating flow toward the heating element through the first and second openings, and is disposed in the housing so as to be synchronized with the vibration, A driving mechanism that has a symmetric structure with respect to the vibration plate in the vibration direction and that drives the vibration of the vibration plate.

  In the present invention, since the drive mechanism has a target structure with respect to the diaphragm, it is possible to obtain aerodynamic characteristics symmetrical to the diaphragm in the housing, and to efficiently cool the heating element. . Examples of the heating element include an electronic component such as an IC chip and a resistor, a heat radiating fin, and the like. Examples of the electronic device include a computer, a PDA (Personal Digital Assistance), a camera, a display device, an audio device, and other electrical appliances. The same applies hereinafter.

  As described above, according to the present invention, it is possible to effectively dissipate heat generated from the heating element while suppressing generation of noise as much as possible.

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

  FIG. 1 is a perspective view showing a jet flow generating apparatus according to the first embodiment of the present invention. 2 and 3 are cross-sectional views taken along line AA and BB shown in FIG. 1, respectively.

  The jet flow generator 1 has a housing 2, and for example, two vibration devices 10 are arranged in the housing 2. The two vibrating devices 10 have substantially the same configuration. The housing 2 is made of a highly rigid material, for example, a metal such as aluminum, but is not limited to a metal and may be a resin. A partition member 2c is provided in the housing 2 to form two chambers 2a and 2b in the upper and lower directions in the figure, and the vibration device 10 is mounted in an opening 2d provided in the partition member 2c. . The interior of the housing 2 is divided by the partition member 2c, the diaphragm 5 and the edge member 18, which will be described later, whereby the chamber 2a and the chamber 2b are formed.

  The vibration device 10 is a vibration device having a structure in which, for example, two speakers face each other. The vibration device 10 includes two actuators 11 and 21 sharing one flat diaphragm 5. The diaphragm 5 is made of, for example, a flexible film-like substance, and is formed of, for example, a PET (polyethylene terephthalate) film. The actuators 11 and 21 have substantially the same configuration, and are respectively attached to the frame 17 fitted in the opening 2d of the partition member. The frame 17 is provided with a plurality of flow holes 17a through which the refrigerant in the housing 2, for example air, flows, on the chambers 2a and 2b side. The actuators 11 and 21 hold, for example, cylindrical yokes 12 and 22, magnets 13 and 23 fixed to the yoke 12, plates 14 and 24 that function as a yoke, coils 15 and 25, and coils 15 and 25. Coil holding members 16 and 26 and the like. The diaphragm 5 is supported by an edge member 18 as a support member attached to the frame. The edge member 18 has, for example, elasticity or flexibility so that the diaphragm 5 can vibrate, and is made of resin or rubber. Coil holding members 16 and 26 that are movable parts are fixed to both surfaces of the diaphragm 5. As a result, the diaphragm 5 and the coil holding members 16 and 26 integrally vibrate in the direction of arrow R. Thus, the vibration device 10 has a symmetric structure with respect to the vibration direction R of the diaphragm 5.

  As shown in FIG. 3, a control unit 19 that controls driving of the actuators 11 and 21 is electrically connected to the coils 15 and 25. The control unit 19 includes, for example, a power supply circuit for applying a sinusoidal AC voltage to the coils 15 and 25, a control circuit for controlling the power supply circuit, and the like. The controller 19 controls the current to flow through the coils 15 and 25 so that the movements of the coil holding member 16 and the coil holding member 26 are in the same direction in synchronization.

  On the side surface of the housing 2, for example, nozzles 3 a and 3 b each having an internal flow path communicating with the chambers 2 a and 2 b are provided, respectively. As shown in FIGS. 1 and 2, a plurality of these nozzles 3a and 3b are arranged in a plane substantially perpendicular to the vibration direction R (FIG. 3). The nozzle 3a and the like do not have to have a shape protruding from the housing 2 or the like, and for example, the side surface of the housing 2 or the like may be opened.

  The operation of the jet flow generating device 1 configured as described above will be described. When the control unit 19 drives the vibration device 10 to vibrate the diaphragm 5 in a sine wave, the volumes in the chambers 2a and 2b increase or decrease. As the volumes of the chambers 2a and 2b change, the pressures in the chambers 2a and 2b change, and along with this, air flows alternately as pulsating flows through the nozzles 3a and 3b, respectively. For example, when the diaphragm 5 is displaced in a direction that increases the volume of the chamber 2b, the pressure in the chamber 2a increases, and the air in the housing 2 is ejected through the nozzle 3a. At this time, the pressure in the chamber 2b becomes low, and air flows into the chamber 2b from the outside through the nozzle 3b. Conversely, when the diaphragm 5 is displaced in a direction that increases the volume of the chamber 2a, the pressure in the chamber 2b increases, and the air in the housing 2 is discharged through the nozzle 3b. At this time, the pressure in the chamber 2a becomes low, and air flows into the chamber 2b from the outside through the nozzle 3a. By blowing the air thus ejected onto, for example, the high heat part, the high heat part can be cooled.

  On the other hand, the vibration of the diaphragm 5 propagates in the air as sound waves. If air is discharged separately from the nozzles 3a and 3b, noise is generated from the nozzles 3a and 3b. However, in this jet flow generator 1, discharge sound is alternately generated from the nozzles 3a and 3b. That is, since the sound waves generated from the nozzles 3a and 3b are in opposite phases, they weaken or cancel each other. Thereby, noise is reduced as a whole.

  In particular, in this embodiment, since the vibration device 10 has a target structure with respect to the diaphragm 5, aerodynamic characteristics that are symmetrical with respect to the diaphragm 5 can be obtained in the housing 2. As a result, the amplitudes of the sound waves generated from the nozzles 3a and 3b become equal, contributing to the weakening of the respective sound waves, and further reducing noise. The lower the symmetry with respect to the diaphragm, the larger the noise (harmonic component of the sound wave) generated by driving the diaphragm 5, the actuator 11, and the like. However, it is possible to reduce noise by ensuring high symmetry as in the present embodiment. Further, by providing the two actuators 11 and 21, a large driving force can be obtained, and the discharge amount of the refrigerant can be increased.

  As shown in FIG. 1, when the distance between the nozzle 3a and the nozzle 3b is d (distance between the openings) and the wavelength of the sound wave (wavelength of the fundamental wave) is λ (m), d <λ / 2, It is desirable that d <λ / 6 is satisfied. In this way, there is no place where the sound waves generated from the nozzles 3a and the like are strengthened at almost the maximum amplitude, so that the generation of noise can be prevented as much as possible.

  FIG. 4 is a cross-sectional view showing a jet flow generating apparatus according to the second embodiment of the present invention. In the description after the second embodiment, the description of the same members and functions of the jet flow generating device 1 according to the first embodiment will be simplified or omitted, and different points will be mainly described.

  In the jet flow generating device 31 shown in FIG. 4, the frame 17 shown in FIG. 3 is not provided, and the actuators 11 and 21 are directly attached to the inner wall 2 e of the housing 2. The diaphragm 5 is directly attached to the partition member 2 c via the edge member 18. According to such a configuration, for example, the structure is simplified and the jet flow generating device 31 can be reduced in size and cost compared to the case where the frame 17 is provided. In addition, the resistance of the air flowing in the housing 2 is reduced and the aerodynamic characteristics are improved as compared with the case where such a frame 17 is provided. Further, the smaller the number of members, the easier it is to maintain symmetry with respect to the diaphragm 5.

  FIG. 5 is a cross-sectional view showing a jet flow generating apparatus according to the third embodiment of the present invention. The edge member 18 that supports the diaphragm 5 of the jet flow generating device 41 is directly attached to the inner wall 2 e of the housing 2. Even with such a configuration, an effect similar to that of the jet flow generating device 31 according to the second embodiment can be obtained.

  In this way, when the edge member 18 is directly attached to the inner wall 2e of the casing 2, as shown in FIG. 6, the diaphragm 5 and the edge member 18 may have a rectangular shape similar to the shape in the circumferential direction of the inner wall 2e. . That is, the shape of the inner wall 2e in the circumferential direction, the outer shape of the diaphragm 5, and the outer shape of the edge member 18 may be similar to each other. The circumferential direction here is a circumferential direction in a plane substantially perpendicular to the vibration direction of the diaphragm 5. According to such a configuration, when the diaphragm 5 vibrates, it is possible to apply vibration to the air contained in the housing 2 with a large area as much as possible. Therefore, the flow rate from the nozzles 3a and 3b is increased accordingly, and the cooling efficiency can be improved. One actuator 11 may be provided on each side of the diaphragm 5.

  FIG. 7 is a cross-sectional view showing a jet generating apparatus according to the fourth embodiment of the present invention. In the jet flow generating device 51, a flow hole 36 a for allowing air to flow through the coil holding member 36 is provided. For example, when a voltage is applied to the coil 35 and the coil holding member 36 moves up and down, the relative movement of the coil holding member 36 and the stator made up of the magnet 13 fixed to the yoke 12 and a plate (not shown) and the like, The stator enters and leaves the space inside the coil holding member 36. If there is no flow hole 36a, the volume of the chamber 2a (or 2b) on the side where the volume is to be reduced due to the bending of the diaphragm 5, for example, is increased by the stator entering the internal space, and the chamber 2a The volume changes of (or 2b) cancel each other out, and the efficiency when generating a jet is deteriorated. Moreover, when there is no flow hole 36a, it is conceivable that a pressure change locally occurs in the internal space of the coil holding member 36 when the diaphragm 5 vibrates, resulting in poor efficiency. As a result, the amount of air discharged is reduced. However, by providing the flow hole 36a, air can escape from the flow hole 36a, so that such a problem can be solved.

  FIG. 8 is a cross-sectional view showing a jet flow generating apparatus according to the fifth embodiment of the present invention. In this jet flow generating device 61, the coil holding member 36 and the diaphragm 5 are connected and fixed by a rod 27. As shown in FIG. 9, a flow hole 46 a is provided at the bottom of the coil holding member 36. Even with such a configuration, when the diaphragm 5 moves in the direction of reducing the volume of the chamber 2a, the air in the internal space 46b of the coil holding member 46 can be released from the circulation hole 46a. Thereby, a jet can be generated efficiently.

  FIG. 10 is a cross-sectional view showing a vibrating device according to another embodiment of the present invention. The vibration device 20 includes a rectangular parallelepiped frame 57, for example, and actuators 11 and 21 are attached to an upper portion and a lower portion of the frame 57, respectively. The frame 57 is provided with a flow hole 57a through which air flows. The diaphragm 55 according to the present embodiment has a cylindrical side wall 55a. The side wall 55a is erected along the vibration direction R, and the upper and lower ends of the side wall 55a are supported by edge members 18a and 18b attached to the frame 57, respectively. . The side wall 55a may be provided continuously in the circumferential direction or may be provided intermittently. The vibrating device 20 is disposed, for example, in the housing 2 shown in FIG. 3, and a jet flow generating device is configured by fitting a frame 57 into the opening 2d of the partition member 2c.

  According to the vibration device 20 as described above, the side wall 55a is supported by the edge members 18a and 18b arranged along the vibration direction R, so that the vibration of the vibration plate 55 is prevented and a stable vibration is obtained. Can do. The longer the length in the vibration direction R of the side wall 55a, the longer the distance between the edge member 18a and the edge member 18b, and the diaphragm 55 vibrates more stably.

  FIG. 11 is a diagram illustrating a modification of the vibration device 20 illustrated in FIG. 10. A lubricant 56 is interposed between the side wall 55a of the vibration plate 55 of the vibration device and the frame 57. As a result, the diaphragm 55 can vibrate smoothly, and as a lubricant that can enhance the airtightness between two chambers formed by partitioning the diaphragm 5 in a housing (not shown), mineral oil is used. And synthetic lubricants. A molybdenum-based solid lubricant may be used. If it is a liquid lubricant, it is effective for improving the airtightness of the front and back of the diaphragm 55. Further, for example, if the frame 57 is a magnetic body, the magnetic material can be easily held if a magnetic fluid is used as the lubricant.

  Next, the wiring structure of the power supply lead wire in the vibration device described so far will be described.

  FIG. 12 is a cross-sectional view showing a vibrating device to which the wiring structure is applied. The actuator 370 of the vibration device 280 includes a yoke 376, a magnet 372, a plate 373 having a yoke function, a coil 378, a movable member 374 around which the coil 378 is wound and a diaphragm 285 is fixed. . The actuator 370 is the same as the actuator 370 shown in FIG. The yoke 376 of the actuator 370 is attached to a frame 286 having a vent hole 286a, and the diaphragm 285 is also attached to the open end of the frame 286 via an edge member 287.

  FIG. 13 is a plan view showing the diaphragm 285, the edge member 287, and the like shown in FIG. As shown in the drawing, a conductive wire 284 for supplying a control signal from a control unit (for example, the control unit 310 shown in FIG. 3) to the coil 378 is formed along a spiral groove 287 a formed in the edge member 287. Wired. The conducting wire 284 is connected to the terminal block 288 fixed to the frame 286. A portion indicated by reference numeral 287 b is a ridge line of the edge member 287. With such a configuration, disconnection of the conductor 284 can be suppressed as compared with the case where the conductor 284 is wired in the air.

  In a general speaker, such a conducting wire (generally referred to as a tinsel wire) is directly connected to the terminal block from the electromagnetic coil through the air. That is, although the diaphragm moves, the terminal block is fixed, so that one side of the tinsel wire moves and the other side is fixed. Since the tinsel wire is subjected to repeated stress following the movement of the diaphragm of tens or hundreds of Hz, the life of the tinsel wire becomes a problem when discussing the durability of the speaker.

  In particular, when the jet flow generating device according to each of the above embodiments is downsized, there is a problem if the conducting wire is simply attached to the diaphragm or the edge member. That is, since the area of the diaphragm is reduced as the jet flow generating device is downsized, it is necessary to increase the amplitude and increase the amount of refrigerant jetted accordingly. In this case, since the length of the tinsel wire is short and the amplitude of the diaphragm is large, the stress applied to the tinsel wire tends to be large. That is, the durability tends to be a bad condition. Specifically, for example, when the conductive wire 289 is wired as shown by a broken line in FIG. 13 (when the conductive wire 289 is wired from the center of the diaphragm 285 along the outer periphery), the stress applied to the conductive wire 284 is large. Therefore, as shown in FIG. 13, the configuration in which the tinsel wire 284 is spirally wired to the edge member 287 is very effective for preventing disconnection. In particular, in the present embodiment, since the conducting wire 284 is wired along the groove 287a, wiring to the edge member 287 becomes easy.

  FIG. 14 is a cross-sectional view showing a vibration device in which two vibration devices 280 shown in FIG. 13 are arranged symmetrically. In this vibration device 290, a conducting wire 284 is wired in a spiral groove provided on both the front and back surfaces of the edge member 287. In this way, by using the bellows shape of the edge member 287, the conductive wire 284 can be spirally wired on the front and back surfaces. The vibration device 290 configured as described above is disposed instead of the vibration device 10 in, for example, the housing 2 shown in FIG.

  The tinsel wire as described above may be embedded in the edge member 287. Further, even if it is not fixed to the edge member 287 or the like, if it can be retained for a long period of time, it can be floated in the air like a spiral coil independently of the edge member 287. Good. In this case, the edge member does not need a spiral groove. This also reduces the stress applied to the conductor.

  The present invention is not limited to the embodiment described above, and various modifications are possible.

  The shape of the casing 2 and the like of the jet flow generating device according to each of the above embodiments is not limited to a rectangular parallelepiped, and may be a cylindrical shape. The diaphragm 5 can also be deformed according to the outer shape of the housing 2 or the shape inside the housing 2.

  In the form shown in FIG. 10, the edge members 18 a and 18 b that support the side wall 55 a of the diaphragm 55 are attached to the frame 57. However, the edge members 18a and 18b may be directly attached to the housing 2 (see FIG. 3 and the like). Thereby, compared with the case where the flame | frame 57 which supports the side wall 55a is provided as mentioned above, a jet flow generator can be reduced in size. In addition, the aerodynamic characteristics are improved as compared with the case where the frame 57 is provided.

It is a perspective view which shows the jet flow generator which concerns on the 1st Embodiment of this invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is sectional drawing which shows the jet flow generator which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the jet flow generator which concerns on the 3rd Embodiment of this invention. It is a cross-sectional view of the jet flow generator shown in FIG. It is sectional drawing which shows the jet flow generator which concerns on the 4th Embodiment of this invention. It is sectional drawing which shows the jet flow generator which concerns on the 5th Embodiment of this invention. It is a perspective view of the coil holding member shown in FIG. It is sectional drawing which shows the vibration device which concerns on other embodiment of this invention. It is a figure which shows the modification of the vibration device shown in FIG. It is sectional drawing which shows the vibration device to which the wiring structure of the conducting wire for electric power feeding to a drive mechanism was applied. It is a top view which shows the diaphragm shown in FIG. 12, an edge member, etc. FIG. FIG. 14 is a cross-sectional view showing a vibrating device configured by symmetrically arranging two vibrating devices shown in FIG. 13.

Explanation of symbols

R ... Vibration direction 1, 31, 41, 51, 61 ... Jet generator 2, 382 ... Housing 2e ... Inner wall 3a ... Nozzle 3b ... Nozzle 5, 55, 285 ... Vibration plate 10, 20, 280, 290 ... Vibration device DESCRIPTION OF SYMBOLS 11, 21, 370 ... Actuator 17 ... Frame 18, 18a, 18b, 287, 387 ... Edge member 36, 46 ... Coil holding member 36a, 46a ... Flow hole 46b ... Internal space 55a ... Side wall 56 ... Lubricant 284 ... Conductor 287a …groove

Claims (18)

A housing having first and second openings and containing gas therein;
A vibration plate disposed in the casing and configured to discharge the gas as a pulsating flow alternately through the first and second openings so as to synchronize with the vibration by giving vibration to the gas;
A jet flow generating device comprising: a drive mechanism disposed in the housing, having a symmetrical structure with respect to the vibration plate in a vibration direction of the vibration plate, and driving the vibration of the vibration plate. The jet generator according to claim 1,
The vibrating plate is a flat plate-shaped jet generating device. The jet generator according to claim 1,
The diaphragm has a first surface substantially perpendicular to the direction of vibration, and a second surface facing the first surface,
The drive mechanism is
The first actuator disposed on the first surface side;
A jet flow generating device, comprising: a second actuator disposed on the second surface side, driven in synchronization with the first actuator, and having the same structure as the first actuator. A jet generator according to claim 1,
The housing has an inner wall;
The jet generating device further includes a support member that is attached to the outer periphery of the diaphragm and is attached to the inner wall and supports the diaphragm. A jet generator according to claim 4,
The jet generating device characterized in that the shape of the outer periphery of the diaphragm is substantially the same as the shape of the inner wall in the circumferential direction at the position where the support member is attached. The jet generator according to claim 1,
The drive mechanism is
A stator,
A cylindrical movable member having an internal space through which at least a part of the stator enters and exits by operation and a flow hole through which the gas communicating with the internal space can flow, and connected to the diaphragm; A jet flow generator characterized by having. The jet generator according to claim 6,
The movable member has a bottom portion provided so that the flow hole faces the diaphragm,
The drive mechanism includes a rod that connects a bottom portion of the movable member and the vibration plate. The jet generator according to claim 1,
The diaphragm is erected so as to extend along a vibration direction, and has a side wall having a first end portion and a second end portion provided on the opposite side of the first end portion in the vibration direction. Have
The jet generator is
A first support member supporting the first end;
And a second support member that supports the second end portion. The jet generator according to claim 1,
The diaphragm has a side wall erected along the direction of vibration,
The jet generating apparatus further includes a support member that supports the side wall so as to be slidable in the vibration direction. The jet generator according to claim 9,
The jet generator according to claim 1, further comprising a lubricant interposed between the side wall and the support member. The jet generator according to claim 10,
The jet generator according to claim 1, wherein the lubricant is a magnetic fluid. The jet generator according to claim 1,
The housing has an inner wall;
The jet generating apparatus according to claim 1, wherein the diaphragm has a side wall that is erected along the direction of vibration and is slidably supported by the inner wall in the direction of vibration. The jet generator according to claim 1,
A support member for supporting the diaphragm on the outer periphery of the diaphragm;
A jet flow generating device, further comprising: a conductor that is wired so as to be attached to at least the support member, and that feeds power to the drive mechanism. The jet generator according to claim 13,
The jet generator according to claim 1, wherein the conductive wire is spirally wired along the periphery of the diaphragm. The jet generator according to claim 13,
The jet generator according to claim 1, wherein the conducting wire is embedded in the support member. The jet generator according to claim 14,
The support member has a groove formed in a spiral shape along the periphery of the diaphragm,
The jet generator according to claim 1, wherein the conducting wire is wired along the groove. The jet generator according to claim 3,
A first groove spirally formed around the diaphragm on the first surface side, and a spiral formed on the second surface side so that the first groove becomes a ridge line. A second groove, and a support member that supports the diaphragm on the outer periphery of the diaphragm;
A first conductor wire routed along the first groove for supplying power to the first actuator;
A jet flow generating device, further comprising: a second conductive wire that is wired along the second groove and supplies power to the second actuator. A heating element;
A housing having first and second openings and containing gas therein;
Arranged in the housing, by applying vibration to the gas, the gas is pulsated alternately toward the heating element through the first and second openings so as to synchronize with the vibration. A diaphragm to be discharged;
An electronic device comprising: a drive mechanism disposed in the housing, having a symmetrical structure with respect to the vibration plate in a vibration direction of the vibration plate, and driving the vibration of the vibration plate.

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