Patent ID: 12203467

DETAILED DESCRIPTION

Hereinafter, a pump system and an electronic device of the present disclosure will be described in detail with reference to certain embodiments shown in the accompanying drawings.

FIG.1is a plan view showing a smart watch according to an embodiment of the present disclosure.FIG.2is a diagram showing an overall configuration of a pump system applied to the smart watch.FIG.3is a cross-sectional view of a pump.FIG.4is a cross-sectional view showing a driving principle of the pump shown inFIG.3.FIG.5is another cross-sectional view showing the driving principle of the pump shown inFIG.3.FIG.6is a diagram showing an AC voltage applied to the pump when the pump is in a vibration suppression mode.FIG.7is a diagram showing a driving state of each pump in the vibration suppression mode.FIG.8is a diagram showing an AC voltage applied to the pump when the pump is in a first vibration generation mode.FIG.9is a diagram showing a driving state of each pump in the first vibration generation mode.FIG.10is a diagram showing an AC voltage applied to the pump when the pump is in a second vibration generation mode.FIG.11is a diagram showing a driving state of each pump in the second vibration generation mode.FIG.12is a diagram showing a state of a pump drive mode.FIG.13is a diagram showing a state of a vibrator drive mode.FIGS.14and15are diagrams respectively showing modified examples of the pump system.

In the following description, it is noted that an X axis, a Y axis and a Z axis which are orthogonal to each other are illustrated in the drawings except forFIGS.1,6,8and10for convenience of explanation. Further, a direction along the X axis is also referred to as an X axis direction, a direction along the Y axis is also referred to as a Y axis direction and a direction along the Z axis direction is also referred to as a Z axis direction. A positive side (an arrowed side) in the Y axis direction is also referred to as “an upper side” and a negative side (an opposite side of the arrowed side) is also referred to as “a lower side”.

An electronic device shown inFIG.1is a wearable terminal, more specifically, a smart watch1. The smart watch1includes a watch body11in which a pump system2is provided and a belt12for attaching the watch body11to an arm of a user.

A touch panel type display13is provided on a surface of the watch body11. Various information can be displayed on the display13. The watch body11has a communication function such as Wi-Fi and Bluetooth and can cooperate with a smartphone or the like. Various applications can be installed in the watch body11. For example, the smart watch1can use the various applications to provide various functions such as time confirmation, mail transmission/reception, voice communication, video communication, music player, electronic payment, blood pressure measurement, pedometer and game. Selection and execution of these applications are performed by touch input through the display13.

The belt12has a buckle side belt14extending from one end (12 o'clock side end) of the watch body11and a blade tip side belt15extending from the other end (6 o'clock side end) of the watch body11. A buckle16having a buckle tongue161is provided at a tip end portion of the buckle side belt14. On the other hand, a plurality of small holes17into which the buckle tongue161can be inserted are formed in the blade tip side belt15along an extending direction of the blade tip side belt15. The smart watch1can be attached to a wrist of the user by passing the blade tip side belt15through the buckle16and inserting the buckle tongue161into one of the small holes17corresponding to a size of the wrist of the user.

A bladder18(a supply target) into which fluid should be supplied from the pump system2is provided at each of the buckle side belt14and the blade tip side belt15. Although the fluid is not particularly limited to a specific kind and may be liquid or gas, in some embodiments, the fluid is the gas. For convenience of explanation, the following description will be provided with assuming that the fluid is air.

In the present embodiment, the bladder18is embedded in each of the buckle side belt14and the blade tip side belt15. However, the present disclosure is not limited thereto. For example, the bladder18may be provided on a rear surface or a front surface of each of the buckle side belt14and the blade tip side belt15. The air is supplied into each of the bladders18from the pump system2to expand each of the bladders18in a state that the smart watch1is attached to the wrist of the user by using the buckle16as described above. As a result, the belt12can be closely contact with the wrist of the user, and thereby it is possible to improve a fitting feeling (a wear feeling) of the smart watch1to the wrist of the user.

Although the smart watch1has been briefly explained in the above description, the configuration of the smart watch1is not particularly limited. For example, the pump system2may be provided in the belt12. Further, the watch body11may include at least one physical button in addition to the display13.

The belt12is not particularly limited as long as it can be attached to the wrist of the user. For example, the belt12may be configured so that the buckle side belt14and the blade tip side belt15are coupled with each other by using a magnet or a hook and loop fastener instead of the buckle16. In addition, the belt12may be configured so that the buckle side belt14and the blade tip side belt15are integrally formed, that is, the belt12has a ring shape connecting the 12 o'clock side end and the 6 o'clock side end of the watch body11and is attached to the wrist of the user only by expansion of the bladders18.

Alternatively, the smart watch1may has a base to which the belt12is connected and the watch body11may be detachably attached to the base. In this case, the pump system2may be provided in the watch body11or may be provided in the base.

Next, the pump system2provided in the smart watch1will be described. As described above, the pump system2has the function of supplying the air into the bladders18to expand the bladders18.

As shown inFIG.2, the pump system2includes a pair of pumps3A,3B, a pipe line4connecting the pumps3A,3B and the bladders18and a control device5for controlling drive of each of the pumps3A,3B. Hereinafter, each of these components will be described in detail.

Pumps3A,3B

A configuration of the pump3A is the same as a configuration of the pump3B. Each of the pumps3A,3B includes a housing7, a vibration actuator8and four pump units9as shown inFIG.3.

The vibration actuator8includes a shaft portion81, a movable body82supported by the shaft portion81so as to be movable with respect to the housing7and a pair of coil core portions85,86fixed to the housing7. The movable body82has an elongated shape extending in the X axis direction. The movable body82is connected to the housing7so that a center portion of the movable body82is supported by the shaft portion81. Thus, the movable body82can perform reciprocating rotation with respect to the housing7around the shaft portion81(the Z axis) like a seesaw.

Magnets83,84are respectively provided at both end portions of the movable body82. The magnets83,84are disposed so as to be symmetrical with each other across the shaft portion81. The magnets83,84respectively have arc-shaped magnetic pole faces831,841respectively facing the coil core portions85,86. S poles and N poles are alternately arranged on each of the magnetic pole faces831,841along its arc direction. Each of the magnets83,84is a permanent magnet.

Pushers87,88are provided on the movable body82for pushing the pump units9when the movable body82performs the reciprocating rotation around the Z axis. The pushers87,88are disposed so as to be symmetrically with each other across the shaft portion81. The pusher87is disposed between the shaft portion81and the magnet83so as to protrude toward both sides in a width direction of the movable body82(both sides of the Y axis direction). Further, the pusher88is disposed between the shaft portion81and the magnet84so as to protrude toward both sides in the width direction of the movable body82(both sides of the Y axis direction).

The coil core portions85,86are respectively disposed on both X axis direction sides of the movable body82. The coil core portion85faces the magnetic pole face831of the magnet83. The coil core portion86faces the magnetic pole face841of the magnet84. The coil core portions85,86are disposed so as to be symmetrical with each other across the shaft portion81.

The coil core portion85includes a core portion851and a coil859wound around the core portion851. The core portion851has a core852around which the coil859is wound and a pair of core magnetic poles853,854respectively extending from both ends of the core852. The core magnetic poles853,854respectively have magnetic pole faces853a,854afacing the magnetic pole face831of the magnet83. Each of the magnetic pole faces853a,854ais curved in an arc shape so as to correspond to a shape of the magnetic pole face831of the magnet83. When electric power is supplied to the coil859from the control device5, the core magnetic poles853,854are excited with different polarities.

The coil core portion86includes a core portion861and a coil869wound around the core portion861. The core portion861has a core862around which the coil869is wound and a pair of core magnetic poles863,864respectively extending from both ends of the core862. The core magnetic poles863,864respectively have magnetic pole faces863a,864afacing the magnetic pole face841of the magnet84. Each of the magnetic pole faces863a,864ais curved in an arc shape so as to correspond to a shape of the magnetic pole face841of the magnet84. When the electrical power is supplied to the coil869from the control device5, the core magnetic poles863,864are excited with different polarities.

The four pump units9are respectively disposed on an upper left side, an upper right side, a lower left side and a lower right side of the shaft portion81. Specifically, two of the pump units9are disposed so as to face each other in the vertical direction (the Y axis direction) across the pusher87. Further, remaining two of the pump units9are disposed so as to face each other in the vertical direction (the Y axis direction) across the pusher88. The four pump units9have the same configuration as each other. Each of the pump units9has a sealed chamber91and a movable wall92.

The sealed chamber91is connected to a suction port98for sucking the air from the outside into the sealed chamber91and a discharge port99for discharging the air in the sealed chamber91toward the outside. In the present embodiment, two of the sealed chambers91located on the upper side of the movable body82share one discharge port99. Remaining two of the sealed chambers91located on the lower side of the movable body82share another discharge port99.

The movable wall92constitutes a part of the sealed chamber91. The movable wall92can be displaced to change a volume in the sealed chamber91when the movable wall92is pushed by the pusher87or88. When the volume in the sealed chamber91reduces due to displacement of the movable wall92, pressure in the sealed chamber91increases and thus the air in the sealed chamber91is discharged from the discharge port99. On the other hand, when the volume in the sealed chamber91increases due to the displacement of the movable wall92, the pressure in the sealed chamber91reduces and thus the air flows into the sealed chamber91through the suction port98. When the above-mentioned reduction and increase of the volume in each of the sealed chambers91are repeated, the air is continuously discharged from the discharge ports99. The movable walls92may be a diaphragm, for example. The movable wall92can be formed from elastically deformable material. Each of the movable walls92has an insertion portion921into which the pusher87or88should be inserted. Each of the movable walls92is connected to the pusher87or88through the insertion portion921.

Valves93are respectively provided between the sealed chambers91and the suction ports98. Each of the valves93allows the air to be suctioned into each of the sealed chambers91through the suction port98and prevents the air from being discharged from each of the sealed chambers91through the suction port98. Further, valves94are respectively provided between the sealed chambers91and the discharge ports99. Each of the valves94allows the air to be discharged from each of the sealed chambers91through the discharge port99and prevents the air from being suctioned into each of the sealed chambers91through the discharge port99. With this configuration, it is possible to more reliably and more efficiently perform the suction and the discharge of the air.

The configurations of the pumps3A,3B have been explained in the above description. However, the configurations of the pumps3A,3B are not particularly limited. For example, the coil core portions85,86may be provided at the movable body82and the magnets83,84may be provided at the housing7. Further, the magnets83,84may be replaced with electromagnets. Furthermore, the number of pump units9may be at least one. The vibration of the movable body82is not limited to the reciprocating rotational vibration and may be, for example, reciprocating linear vibration as described later.

Next, the drive of the pumps3A,3B will be described. In the following description, the four pump units9are distinguished from each other by labeling them as the “pump unit9A”, the “pump unit9B”, the “pump unit9C” and the “pump unit9D” for convenience of explanation.

When an AC (alternating-current) voltage is applied from the drive control device5to the coils859,869, the movable body82performs the reciprocating rotation around the shaft portion81(around the Z axis). Thus, each of the pumps3A,3B is driven by repeatedly alternating between a first state in which the movable body82rotates toward one direction as shown inFIG.4and a second state in which the movable body82rotates toward another direction as shown inFIG.5. In the first state shown inFIG.4, the core magnetic poles853,864are excited with the N pole and the core magnetic poles854,863are excited with the S pole. Conversely, in the second state shown inFIG.5, the core magnetic poles853,864are excited with the S pole and the core magnetic poles854,863are excited with the N pole.

In the first state, torque F1directed toward an arrow direction illustrated inFIG.4is generated by magnetic force (attractive force and repulsive force) acting between the magnets83,84and the coil core portions85,86, and thereby the movable body82rotates in the direction of the torque F1. With this movement, the movable walls92of the pump units9A,9D are respectively pushed by the pushers87,88, and thereby the volumes in the sealed chambers91of the pump units9A,9D are reduced. As a result, the air in the sealed chambers91of the pump units9A,9D is discharged from the discharge ports99. On the other hand, since the volumes in the sealed chambers91of the pump units9B,9C increase, the air flows into the sealed chambers91of the pump units9B,9C through the suction ports98.

In the second state, torque F2directed toward a direction opposite to the direction of the torque F1is generated by the magnetic force (attractive force and repulsive force) acting between the magnets83,84and the coil core portions85,86, and thereby the movable body82rotates in the direction of the torque F2. With this movement, the movable walls92of the pump units9B,9C are respectively pushed by the pushers87,88, and thereby the volumes in the sealed chambers91of the pump unit9B,9C are reduced. As a result, the air in the sealed chambers91of the pump unit9B,9C is discharged from the discharge ports99. On the other hand, since the volumes in the sealed chambers91of the pump units9A,9D increase, the air flows into the sealed chambers91of the pump units9A,9D through the suction ports98.

As described above, when each of the pumps3A,3B repeatedly alternates between the first state and the second state, it is possible to repeatedly alternate the state in which the air is discharged from the pump units9A,9D and the state in which the air is discharged from the pump units9B,9C. As a result, the air can be continuously discharged from the pumps3A,3B.

The drive of the pumps3A,3B has been explained in the above description. Next, a driving principle of the pumps3A,3B will be explained. The vibration actuator8of each of the pumps3A,3B is driven according to a motion equation expressed by the following equation (1) and a circuit equation expressed by the following equation (2).

Equation⁢1J⁢d2⁢θ⁢(t)dt2=Kf⁢i⁡(t)-Ksp⁢θ⁡(t)-D⁢d⁢θ⁢(t)dt(1)J:Inertial⁢moment[Kg*m2]θ⁢(t):Displacement⁢angle⁢[rad]Kf:Thrust⁢constant[Nm/A]i⁡(t):Current[A]Ksp:Spring⁢constant[Nm/rad]D:Damping⁢coefficient[Nm/(rad/s)]Equation⁢2e⁡(t)=Ri⁡(t)+L⁢d⁢i⁢(t)dt+Ke⁢d⁢x⁢(t)dt(2)e⁡(t):Voltage[V]R:Resistance[Ω]L:Inductance[H]Ke:Counter-electiomotive⁢force⁢constant[V/(rad/s)

As described above, the inertial moment J [Kg*m2], the displacement angle (rotational angle) θ(t) [rad], the thrust constant Kf[Nm/A], the current i(t) [A], the spring constant Ksp[Nm/rad], the damping coefficient D [Nm/(rad/s)] and the like of the movable body82can be appropriately set as long as they satisfy the equation (1). Similarly, the voltage e(t) [V], the resistance R [Ω], the inductance L [H] and the counter-electromotive force constant Ke[V/(rad/s)] can be appropriately set as long as they satisfy the equation (2).

Further, a flow rate of each of the pumps3A,3B is determined by the following equation (3) and pressure of each of the pumps3A,3B is determined by the following equation (4).

Equation⁢3Q=Axf*60(3)Q:Flow⁢rate⁢[L/min]A:Piston⁢area[m2]x:Piston⁢displacement[m]f:Drive⁢frequency[Hz]Equation⁢4P=P0(V+Δ⁢VV-Δ⁢V-1)(4)P:Increased⁢pressure[kPa]P0:Atmospheric⁢pressure[kPa]V:Sealed⁢chamber⁢volumn[m3]Δ⁢V:Changed⁢volume[m3]Δ⁢V:AxA:Piston⁢area[m2]x:Piston⁢displacement[m]

As described above, the flow rate Q [L/min], the piston area A [m2], the piston displacement x [m], the drive frequency f [Hz] and the like of each of the pumps3A,3B can be appropriately set as long as they satisfy the equation (3). Similarly, the increased pressure P [kPa], the atmospheric pressure P0[kPa], the sealed chamber volume V [m3], the changed volume ΔV [m3] and the like can be appropriately set as long as they satisfy the equation (4).

Next, a resonance frequency of the vibration actuator8of each of the pumps3A,3B will be explained. The vibration actuator8has a spring mass system structure for supporting the movable body82by magnetic springs formed by the magnetic force acting between the coil core portions85,86and the magnets83,84and air springs (fluid springs) formed by elastic force of compressed air in the sealed chambers91. Thus, the movable body82has a resonant frequency frexpressed by the following equation (5). By applying an AC voltage whose frequency is substantially equal to the resonance frequency frto the coils859,869of each of the pumps3A,3B, it is possible to allow the movable body82of each of the pumps3A,3B to perform the resonance drive, thereby efficiently driving each of the pumps3A,3B.

Equation⁢5fr=12⁢π⁢KspJ(5)fr:Resonance⁢frequency[Hz]Ksp:Spring⁢constant[Nm/rad]J:Inertial⁢moment[Kg*m2]

The pumps3A,3B have been explained in the above description. As shown inFIG.2, the pumps3A,3B are arranged in parallel to each other along the Y axis direction with being directed toward the same direction. Thus, vibration directions of the vibration actuators8of the pumps3A,3B coincide with each other. By arranging the pumps3A,3B so that the vibration directions of the vibration actuators8of the pumps3A,3B coincide with each other, it becomes easier to cancel the vibration of the vibration actuators8of the pumps3A,3B with each other or easier to superimpose the vibration of the vibration actuators8of the pumps3A,3B with each other. Thus, it is possible to drive the pump system2in a vibration suppression mode M1or a vibration generation mode M2with simple control as described later. However, arrangements of the pumps3A,3B are not particularly limited. For example, the pumps3A,3B may be arranged in parallel to each other along the X axis direction with being directed toward the same direction. Alternatively, the pumps3A,3B may be arranged so as to overlap each other in the Z axis direction with being directed toward the same direction.

Pipe Line4

As shown inFIG.2, the pipe line4connects the pumps3A,3B to the bladders18. Specifically, the pipe line4includes a discharge port connection pipe line41for connecting the four discharge ports99of the pumps3A,3B to each other, a bladder connection pipe line42for connecting the two bladders18provided in the belt12, an intermediate pipe line43for connecting the discharge port connection pipe line41and the bladder connection pipe line42and an electromagnetic valve44provided in the middle of the intermediate pipe line43. Under the control of the control device5, the electromagnetic valve44can switch among an open state (a first state) in which the discharge port connection pipe line41and the bladder connection pipe line42are communicated with each other, a closed state (a second state) in which a connection between the discharge port connection pipe line41and the bladder connection pipe line42is cut and a release state (a third state) in which the bladder connection pipe line42is closed and the discharge port connection pipe line41is opened to the atmosphere.

Control Device5

The control device6has a function of controlling the drive of the pumps3A,3B and the electromagnetic valve44. The control device5is composed of a computer or the like. The control device5has a processor for processing information, a memory communicatively connected to the processor and an external interface. In addition, the memory stores various programs which can be executed by the processor and the processor can read and execute the various programs stored in the memory for providing required functions.

Further, the control device5has the vibration suppression mode M1and the vibration generation mode M2which can be used as a drive mode for driving the pumps3A,3B. The vibration suppression mode M1is a drive mode in which the pumps3A,3B are driven so that the vibration of the vibration actuators8of the pumps3A,3B is canceled each other and no vibration is generated from the pump system2. On the other hand, the vibration generation mode M2is a drive mode in which the pumps3A,3B are driven so that the vibration of the vibration actuators8of the pumps3A,3B are superimposed with each other, thereby generating vibration from the pump system2. Furthermore, the vibration generation mode M2of the control device5contains a first vibration generation mode M21and a second vibration generation mode M22. An intensity and a rhythm of vibration in the first vibration generation mode M21are different from an intensity and a rhythm of vibration in the second vibration generation mode M22.

The vibration generation mode M2is used when the pump system2should be serves as notification means for notifying information to the user by using the vibration, like a vibrator. As described above, since the pump system2can be also used as the notifying means, it becomes unnecessary to provide any notifying means such as a vibrator separately from the pump system2. Thus, it is possible to reduce the size of the smart watch1, simplify the structure of the smart watch1and reduce the cost of the smart watch1. In particular, since the smart watch1can switch between the vibration suppression mode M1and the vibration generation mode M2, it is possible to turn on/off the vibration. Therefore, it is possible to generate the vibration only when the vibration is required.

As described above, when the pumps3A,3B are driven, the movable body82of each of the pumps3A,3B performs the reciprocating rotation around the shaft portion81. As a result, the vibration corresponding to the reciprocating rotation of the movable body82of each of the pumps3A,3B generates from each of the pumps3A,3B. Thus, the control device5switches among the vibration suppression mode M1, the first vibration generation mode M21and the second vibration generation mode M22by changing a phase difference between the vibration of the movable body82of the pump3A and the vibration of the movable body82of the pump3B to cancel the two kinds of the vibration with each other or superimpose the two kinds of the vibration with each other for amplifying the two kinds of the vibration. According to the above-mentioned method, it is possible to easily and instantaneously switch among these modes.

In the vibration suppression mode M1, the drive of the pumps3A,3B is controlled so that the vibration generated in the pump3A and the vibration generated in the pump3B are counterbalanced with each other, that is, canceled each other. Specifically, the pumps3A,3B are respectively driven in opposite phases by respectively applying AC voltages Va, Vb, whose phases are opposite to each other (that is, shifted from each other by 180°) as shown inFIG.6, to the pumps3A,3B. In the vibration suppression mode Ml, when the pump3A is in the first state, the pump3B is in the second state. On the other hand, when the pump3A is in the second state, the pump3B is in the first state as shown inFIG.7. Thus, the vibration of the pump3A and the vibration of the pump3B are canceled each other. As a result, the vibration of the pump system2is suppressed as a whole and may become zero. In this regard, the language of “opposite phases” used in the above description contains not only the case where phases are shifted from each other by 180° but also a case where the phase difference between the opposite phases varies from 180° due to an error that may occur due to some technical problems or the like.

According to the above-described vibration suppression mode M1, it is possible to drive the pump system2in a state that the vibration of the pump system2is suppressed, for instance, in a state that the vibration of the pump system2is not generated. Thus, the vibration suppression mode M1is suitable for a case where the air should be supplied to the bladders18without generating the vibration of the pump system2, for example.

In the first vibration generation mode M21, the drive of the pumps3A,3B is controlled so that the vibration generated in the pump3A and the vibration generated in the pump3B are superimposed with each other, that is, overlapped and amplified with each other. Specifically, the pumps3A,3B are driven in-phase with each other by respectively applying in-phase AC voltages Va, Vb to the pumps3A,3B as shown inFIG.8. In the first vibration generation mode M21, when the pump3A is in the first state, the pump3B is also in the first state. Further, when the pump3A is in the second state, the pump3B is also in the second state as shown inFIG.9. Thus, the vibration of the pump3A and the vibration of the pump3B are superimposed with each other. As a result, the vibration of the pump system2is generated as a whole. In particular, it is possible to generate larger vibration by driving the pumps3A,3B in-phase. In this regard, the language of the “in-phase” contains not only in the case where the phases for the pumps3A,3B are completely matched but also a case where the phase difference between the phases for the pumps3A,3B varies from 0° due to an error that may occur due to some technical problems or the like.

In the second vibration generation mode M22, the drive of the pumps3A,3B is controlled so that the vibration generated in the pump3A and the vibration generated in the pump3B are superimposed with each other, similarly to the first vibration generation mode M21. Specifically, the pumps3A,3B are respectively driven with different phases which are shifted with each other by 90° by applying different AC voltages Va, Vb whose phases are shifted from each other by 90° as shown inFIG.10to the pumps3A,3B. In the second vibration generation mode M22, when the pump3A is in the first state, the pump3B is in the middle of transition from the second state to the first state. When the pump3B is in the first state, the pump3A is in the middle of transition from the first state to the second state. When the pump3A is in the second state, the pump3B is in the middle of transition from the first state to the second state. When the pump3B is in the second state, the pump3A is in the middle of transition from the second state to the first state as shown inFIG.11. Thus, the vibration of the pump3A and the vibration of the pump3B are superimposed with each other and the vibration of the pump system2is generated as a whole.

In the second vibration generation mode M22, since there is timing at which the two kinds of vibration are canceled each other, an intensity of the vibration of the pump system2generated in the second vibration generation mode M22is weaker than an intensity of the vibration of the pump system2generated in the first vibration generation mode M21. Further, since timing at which the movable body82of the pump3A reaches a dead center is shifted from timing at which the movable body82of the pump3B reaches a dead center, a cycle of the vibration of the pump system2generated in the second vibration generation mode M22is shorter than a cycle of the vibration of the pump system2generated in the first vibration generation mode M21. Specifically, the cycle of the vibration of the pump system2generated in the second vibration generation mode M22is substantially half of the cycle of the vibration of the pump system2generated in the first vibration generation mode M21. In this regard, it should be noted that the phase difference between the phases for the pumps3A,3B in the second vibration generation mode M22is not limited to 90° and may be appropriately changed within a range of about 90°±45°, for example.

The vibration suppression mode M1and the vibration generation mode M2have been explained in the above description. The control device5further has a pump drive mode Mp for supplying the air into the bladders18from the pump system2and a vibration drive mode Mv for vibrating the pump system2without supplying the air into the bladders18from the pump system2. Thus, since the control device5has the pump drive mode Mp and the vibration drive mode Mv, the pump system2can be uses as not only a pump but also a vibrator. As a result, it is possible to significantly improve the convenience of the pump system2. In this regard, the switching between the pump drive mode Mp and the vibration drive mode Mv can be performed by the drive of the electromagnetic valve44. Thus, it is possible to easily switch between the pump drive mode Mp and the vibration drive mode Mv.

Pump Drive Mode Mp

In the pump drive mode Mp, the pump system2is driven so that the air is supplied into the bladders18from the pump system2. Specifically, the pumps3A,3B are driven in a state that the electromagnetic valve44is in the open state as shown inFIG.12. As a result, the air discharged from the pumps3A,3B is supplied into the bladders18to expand the bladders18. In this pump drive mode Mp, the pumps3A,3B may be driven in the vibration suppression mode M1or may be driven in the vibration generation mode M2. When the pumps3A,3B are driven in the vibration suppression mode M1, the pump system2does not generate the vibration while the air is suppled into the bladders18. When the pumps3A,3B are driven in the vibration generation mode M2, the pump system2vibrates while the air is supplied into the bladders18. For example, when the air supply into the bladders18should be notified to the user or when the user wishes to receive notification of the air supply, the pumps3A,3B may be driven in the vibration generation mode M2. Alternatively, when the air supply into the bladders18needs not to be notified to the user or when the user does not wish to receive the notification of the air supply, the pumps3A,3B may be driven in the vibration suppression mode M1. For example, the user can freely change settings regarding the vibration suppression mode M1and the vibration generation mode M2.

The above-described pump drive mode Mp is mainly used when the smart watch1is attached to the user. Specifically, the pump drive mode Mp is used when the air is supplied to the bladders18to closely attach the belt12to the wrist of the user after the smart watch1is attached to the wrist of the user by the buckle16. However, the pump drive mode Mp can be used for other applications and operations.

Vibration Drive Mode Mv

In the vibrating drive mode Mv, the pump system2is driven so that the air is not supplied into the bladders18from the pump system2. Specifically, the pumps3A,3B are driven in the vibration generation mode M2in a state that the electromagnetic valve44is in the release state as shown inFIG.13. Thus, the air discharged from the pumps3A,3B is released to the atmosphere through the electromagnetic valve44and is not supplied into the bladders18. Therefore, the function as the pump is not provided and the pump system2substantially serves as only the vibrator.

The above-described vibration drive mode Mv can be used for various applications such as a response to an input operation from the user, mail transmission/reception, voice call transmission/reception, video call transmission/reception, complete of electronic payment and the like.

The air released to the atmosphere through the electromagnetic valve44may be used for an appropriate application. Although this application is not particularly limited, it is possible to cool the components contained in the watch body11by blowing the released air onto the components contained in the watch body11, for example. In addition, if the smart watch1has a configuration that the air is discharged to the outside of the watch body11, it is possible to cool down the user by directing the air discharged from the watch body11to a face, a neck or the like of the user.

Although the pump system and the electronic device of the present disclosure have been described with reference to the illustrated embodiment, the present disclosure is not limited thereto. The configuration of each part can be replaced with any configuration having a similar function. Further, other optional component(s) may also be added to the present disclosure.

Further, although the smart watch1has been described as one example of the electronic device in the above-described embodiment, the electronic device is not limited thereto. For example, the present disclosure can be applied to all devices which can have the pump function and the vibrator function. Although the pump system2includes the pair of pumps3A,3B in the above-described embodiment, the pump system2is not limited thereto. For example, the pump system2may include plural pairs of pumps3A,3B. Further, although the movable body82of each of the pumps3A,3B can perform the reciprocating rotational vibration around the shaft portion81in the above-described embodiment, the present disclosure is not limited thereto. For example, the movable body82may be configured to perform reciprocating linear vibrate in the X axis direction as shown inFIG.14.

Further, the configuration of the pipe line4is not particularly limited. For example, the pipe line4may contain a first pipe line4A for connecting the pump3A and one of the bladders18and a second pipe line4B for connecting the pump3B and the other one of the bladders18as shown inFIG.15.