JP2001301690A - Swimming assist device - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To obtain a small, lightweight, and highly safe swimming assist device. SOLUTION: A water inlet 11 is provided on a substrate integrated with a human body.
1a and a water flow propulsion type electric pump 110 having a drain port 109a, 109b and operated by being driven by a battery. Alternatively, grip portions 106 are provided on both front sides.
a, 106b, and an operation unit 107a provided near at least one grip unit, a hull floating above the water, and a water flow propulsion type electric pump 110 provided integrally with the hull and supplied with power by a battery. And the electric pump 11 in response to the operation of the operation unit 107a.
Control means for controlling the zero power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swimming assist device using a water flow propulsion type electric pump. The present invention can also be used for marine leisure where a person can grab and run on the water or dive into the water and enjoy it, or can be used for towing a surfboard or other water board. A swimming assist device.
The present invention also relates to a swimming assist device that is attached to a human body and assists a swimming operation.

[0002]

2. Description of the Related Art Various types of swimming assist devices and assisting devices for assisting human swimming have been put into practical use. These swimming assist devices and swimming aids are generally given a form according to the purpose. Here, some swimming assist devices and swimming aids will be introduced for each purpose.

[Apparatus for getting close to water] For example, swimming
For beginners of swimming and elderly people, floats, floats and the like are widely used. These floats and floats are generally configured so as to hermetically store air therein, and that the stored air generates buoyancy against water. The float is
It has a donut-like shape, and various types of floats, such as mat shapes and animal shapes, have been put into practical use. Such floats and floats are often used for beginners of swimming and swimming such as children to get acquainted with water, and for elderly people with reduced physical strength to enjoy swimming and swimming.

[0004] In addition, since the floating ring is easily attached to a human body and integrated with the human body, the floating ring is generally used for water rescue and self-help. As a water rescue and self-help application, a life jacket, which is an embodiment of a floating tool, is widely used.

[0005] Japanese Patent Application Laid-Open No. 11-267246 discloses a floating ring that can obtain a stronger sense of unity with the human body. The floating ring is configured such that a wear-like upper body mounting portion such as a running shirt is fixed to the inner periphery of the floating ring.

[Equipment used for swimming practice] Next, although it is similar to a float or a float in that it produces buoyancy with respect to water, as a swim aid having a strong meaning for swimming practice, Beat boards are widely used.
This beat board is a plate-like material made of a material that generates buoyancy against water.For example, it is used for practicing flapping feet and butterfly kicks by holding with both hands, or in a crawl or butterfly sandwiched between thighs. Used to practice upper body movements.

[Apparatus Mainly Used for Marine Sports] Next, as a swim assist apparatus mainly used for marine sports, a swim assist apparatus having a power source for generating a propulsive force in water has become widespread. Such a swimming assist device generally has a handle or the like that a person holds with both hands, and assists swimming on or under water using a propulsive force of a power source. As this type of swimming assist device,
Surfboards with propulsion devices that can be used by individuals to travel on water are known. For example, JP-A-55-1068
No. 86 discloses a configuration in which a propulsion device provided with a turbofan is attached to a rear portion of a surfboard, a water introduction port and a drainage port are provided, and the board is propelled by compressed drainage of water. Further, Japanese Patent Application Laid-Open No. 57-185875 discloses a configuration in which a propulsion device of a type in which a propeller is rotationally driven by a prime mover is attached to a tail portion of a surfboard, and the board is propelled by rotation of the propeller. In addition, as this type of swimming assist device, for example,
Some are disclosed in JP-A-143398 and JP-A-5-58388. The former real Kaihei 2-143398
The underwater and underwater propulsion devices disclosed in Japanese Patent Application Laid-Open Publication No. H10-15095 put the battery in a cylindrical main body having a front part and a rear part formed in an elliptical shape,
A motor driven by the battery is mounted so as to protrude rearward, a propeller is directly connected to the motor, and an outer periphery of the propeller is surrounded by a water guide ring. And a rudder is provided in the rear part. Further, Japanese Patent Laid-Open Publication No.
The underwater / underwater propulsion device disclosed in Japanese Patent No. 8388 has a battery and a motor housed in a cylindrical main body having a front part and a rear part formed in an elliptical shape, and a propeller connected to the motor via a reduction gear unit. The outer periphery of the propeller is surrounded by a water guide ring. Further, Japanese Patent Application Laid-Open No. 49-77393 discloses a swimming assist device not only having a power source for generating a propulsive force in water, but also having a float for supporting the chest of a human body.

[0008] Such a swim assist device having a power source for generating a propulsion force in water is used not only as a swim assist for marine sports, but also, for example, in various underwater and underwater environments.
Often used for seafloor surveys.

[0009]

First, the problem of a swimming assist device having a power source for generating propulsion underwater will be described.

[0010] In this type of conventional apparatus, a propeller is used, so that the entire outer shape becomes large and the weight is heavy. In particular, the main body does not float on water, and for use on the water surface, a floating body such as another board must be used in connection with the body, which is inconvenient in transportation and storage.

Further, there is a danger that the motor is locked or the propeller is damaged due to foreign matter entangled in the propeller,
To prevent this, safety measures such as providing a clutch mechanism that automatically cuts off power transmission when the load torque becomes excessive were necessary.

[0012] Further, when used underwater for diving, the floating body must be removed.
In this case, the specific gravity of the main body is heavier than water, so if you inadvertently release your hand from the handle of the main body, the main body as a propulsion unit will sink to the bottom of the water, There was a risk that it would be difficult to collect it.
In addition, when the motor is stopped due to running out of battery or the like during operation underwater, it is difficult to lift the heavy main body as a propulsion device and levitate. There were difficulties.

Further, the swim assist device using a surfboard has a problem that the surfboard itself is large, so that it becomes large and expensive as a whole. In addition, certain training is required to ride a surfboard, so that only a limited number of people can use the surfboard, and ordinary people cannot use it easily in sea bathing or the like.

Next, general problems in a swim assisting device and a swim assisting device for assisting a person in swimming will be described.

Various types of swimming assist devices and assisting devices for assisting a person's swimming operation have been put into practical use and spread according to their purposes.

However, various uses, for example, a use to get close to water, a practice for swimming, a use for marine sports, etc.
Equipment for swimming assistance that can be used in many applications
Instruments are not found in the past. Looking at this from a different perspective, conventional swimming assist devices and swim aids have a strong tendency to polarize according to application, and a single device / apparatus that can respond to almighty for various applications with a single device / apparatus. I can't say that.

In particular, a device provided with a power source tends to be large in size, and it is inappropriate to use the device only for getting close to water or for swimming practice. That is,
Technically, conventional power sources have the problem of being large and heavy, and these technical problems have hindered the practical application of a single device / apparatus that can be almighty for various applications. It is thought that there is.

Further, in the conventional swimming assist device having a power source, the nature of the power source is large and heavy, so that it is inevitably required to hold the operator's hand, which hinders the free movement of the arm of the operator. There is another problem.

The problem of hindering the movement of the human body necessary for swimming / swimming is also a problem that many swimming assist devices and swim assist devices have. For example, the floating ring hinders the movement of the arm during swimming or swimming due to the structure of being held between the sides and obtaining a sense of unity with the human body. Many of the floaters require the hand of the swimmer / swimmer to grasp the hand, and thus also hinder the movement of the arm during swimming / swimming. The same applies to beach boards. Especially for beach boards,
When used between the thighs, the movement of the arms is not hindered, but the movement of the legs is hindered.

Further, as a condition of the apparatus / apparatus capable of being almighty for various uses, it is necessary that the apparatus / apparatus can be used both on the water surface and in the water. A swimming aid that generates buoyancy with respect to natural water has a problem that it is inherently unsuitable for use in water.

An object of the present invention is to provide a swimming assist device which is light and easy to handle.

An object of the present invention is to provide a swimming assist device which is small and easy to handle.

An object of the present invention is to provide a swimming assist device which can realize a low price.

[0024] It is an object of the present invention to obtain a swimming assistance device with high safety.

An object of the present invention is to provide a swimming assist device that can be easily recovered from water.

An object of the present invention is to provide a highly practical swimming assist device which can be used easily by ordinary people in sea bathing or the like without training.

An object of the present invention is to provide a swimming assistance device which can be used for a variety of purposes in an almighty manner.

An object of the present invention is to provide a swimming assist device which does not hinder swimming / swimming operation.

[0029]

According to a first aspect of the present invention, there is provided a swimming assist device which is driven by a battery having a base integrated with a human body, and a water inlet and a drain attached to the base. And a water flow propulsion type electric pump that operates.

According to a second aspect of the present invention, there is provided a swimming assist device which has grip portions on both front sides and an operation portion near at least one of the grip portions so as to float on the water, and is integrated with the hull. And a water flow propulsion type electric pump supplied with power by a battery, and control means for controlling the power of the electric pump in response to the operation of the operation unit.

According to a third aspect of the present invention, there is provided the swimming assist device according to the second aspect, wherein electric pumps are provided on the right and left rear of the hull.

According to a fourth aspect of the present invention, there is provided the swimming assist device according to the second aspect, wherein one electric pump is provided on a center line behind the hull.

According to a fifth aspect of the present invention, in the swimming assist device according to the third or fourth aspect, the water inlets of the electric pump are arranged on the bottom surface near the right and left positions of the center of gravity of the boat.

[0034] The invention according to claim 6 is the invention according to claims 2 to 5.
The swimming assist device according to any one of the above, wherein the battery is disposed near the center of gravity of the boat.

The invention according to claim 7 is the invention according to claims 2 to 6
In the swimming assist device according to any one of the above, a display device that displays at least the remaining battery capacity is disposed at a front portion of the upper surface of the hull.

According to the invention of the eighth aspect of the invention, the buoyancy is set to be slightly larger than zero by incorporating a battery and an electric pump operated by the battery, and a handle for a person to grip is provided on the outer surface. A main body is formed, and the electric pump is disposed in a flow path that communicates a water inlet formed at a lower part or a bottom part of a waterline in front of the main part with a water outlet formed at a lower part of a waterline behind the main part. The propulsion force is generated by the reaction force of the water flow by the electric pump.

According to a ninth aspect of the present invention, there is provided the swimming assist device according to the eighth aspect, characterized in that the water-suction side and the drainage side are switchable electric pumps.

The invention according to claim 10 is the invention according to claim 8 or 9
In the above described swim assist device, the electric pump is a swim assist device which can freely absorb and drain water, having a main flow path in the motor.

According to an eleventh aspect of the present invention, in the swimming assist device according to the second, ninth or tenth aspect, a buoyancy control chamber is provided in the main body so that the amount of loaded water can be adjusted.

According to a twelfth aspect of the present invention, in the swimming assist device according to the eleventh aspect, the buoyancy adjusting chamber has a water supply / drain port communicating with a flow path provided with the electric pump and a supply / exhaust port communicating with the outside air. Formed.

According to a thirteenth aspect of the present invention, in the swimming assist device according to the eleventh or twelfth aspect, a buoyancy adjusting chamber is formed above the battery.

According to a fourteenth aspect of the present invention, in the swimming assist device according to the eighth, ninth or tenth aspect, a rotation control means for controlling increase / decrease of rotation speed and switching of rotation direction is connected to a motor of the electric pump.

According to a fifteenth aspect of the present invention, in the swimming assist device according to the fourteenth aspect, the handle of the main body is moved in the left-right direction, and the moving direction and the moving amount are used as inputs to the rotation control means to control the electric pump. Increase / decrease of the number of rotations of the motor and switching of the rotation direction are controlled.

The invention of a swimming apparatus according to a sixteenth aspect of the present invention is directed to a swimming apparatus having a band portion detachably attached to a human torso, a water inlet and a drain port at both ends, and the band portion is attached to the human torso. An electric pump provided in the band portion such that the water intake port is located on the head side and the drain port is located on the leg side in a state in which the power supply is provided in an airtight state in the band portion. A drive control circuit that drives and controls the electric pump, and a power storage unit that is provided in the band unit and stores the power supply for the drive circuit in an airtight state.

Therefore, by driving and controlling the electric pump by the drive control circuit in a state where the band portion is mounted on the body of the person, the propulsive force of the electric pump is obtained. At this time, since it is attached to the torso, it does not hinder swimming / swimming operation. Also, it can be used on the water surface or under water.

The invention according to claim 17 is based on claims 1, 2,
17. The swimming assist device according to 8 or 16, wherein the electric pump has an axial vane inside a cylindrical stator that sends out a fluid sucked in from the water intake port toward the drain port in an axial direction. Is an in-line type electric pump provided rotatably.

Accordingly, the rotation of the axial flow blade causes the fluid to be sent out from the water intake to the drain, thereby generating a propulsive force.

The invention according to claim 18 is the swimming assist device according to claim 17, wherein the in-line type electric pump rotates the fluid sent toward the drain port by the axial flow blade of the rotor. A first pressure chamber that converts kinetic energy into static pressure energy, and a second pressure that is disposed between the first pressure chamber and the drain port and is separated from the first pressure chamber by a partition wall. And a guide hole arranged on the outer peripheral portion of the partition wall and connecting between the first pressure chamber and the second pressure chamber.

Therefore, when the rotor is rotated, the fluid sucked from the water suction port is sent to the first pressure chamber by the axial flow blade, and the rotational kinetic energy is converted into static pressure energy in the first pressure chamber. Further, the water is discharged from the drain hole through the guide hole through the second pressure chamber.

A nineteenth aspect of the present invention is the swimming assist device according to the eighteenth aspect, wherein in the in-line type electric pump, the rotary shaft of the rotor is rotatable at a center of the partition wall with a predetermined clearance. A sliding bearing is provided for supporting the bearing, and a leakage flow passage communicating the second pressure chamber and an inner peripheral surface of the sliding bearing is formed in the partition wall.

Therefore, since the fluid in the second pressure chamber is interposed between the rotating shaft of the rotor and the sliding bearing with a uniform pressure distribution, the lubrication of the rotating shaft can be maintained well for a long period of time.

According to a twentieth aspect of the invention, there is provided the swimming assist device according to the eighteenth or nineteenth aspect, wherein in the in-line electric pump, the second pressure chamber has a second rotation integrally rotating with the rotor. Axial blades are provided.

Therefore, the fluid can be sent by dispersing the pressure by the axial flow blade provided inside the stator and the second axial flow blade provided in the second pressure chamber.

According to a twenty-first aspect of the present invention, there is provided the swimming assist device according to any one of the eighteenth to twentieth aspects, wherein the in-line type electric pump has a minimum radius centered on the axis of the rotor. The diameter of the concave portion of the axial flow blade is determined to be larger than the diameter of a support portion formed on the partition wall for supporting the slide bearing.

Therefore, it is possible to reduce the vortex loss due to the collision between the fluid sent by the axial flow blade and the supporting portion supporting the sliding bearing, and to prevent the occurrence of cavitation.

According to a twenty-second aspect of the present invention, in the swimming assist device according to any one of the eighteenth to twenty-first aspects, in the in-line type electric pump, the axial flow blade has a spiral shape on a cylindrical or cylindrical outer periphery. The spiral groove has a shape in which a groove is formed, and the width and the depth of the spiral groove are set to substantially equal values.

Therefore, by appropriately setting the relationship between the width and the depth of the spiral groove, the flow path resistance can be reduced and the generation of vortices can be suppressed. Thereby, the fluid can be sent more efficiently.

According to a twenty-third aspect of the present invention, there is provided the swimming assist device according to the seventeenth aspect, wherein the in-line type electric pump rotates the fluid sent toward the drain port by the axial flow blade of the rotor. A pressure chamber for converting kinetic energy to static pressure energy, a centrifugal blade arranged in the pressure chamber and rotating integrally with the rotor, and the fluid sucked from the water inlet through an outer peripheral portion of the stator. A suction flow path that is guided so as to be guided to a pressure chamber and fed toward a surface of the centrifugal blade opposite to the axial flow blade, and a rotation of the centrifugal blade causes fluid in the pressure chamber to flow through the pressure chamber. And a guide passage leading from the outer peripheral portion to the drain port.

Therefore, when the rotor is rotated, the fluid sucked in from the water suction port is sent to the pressure chamber by the axial flow blade, where the rotational kinetic energy is converted into static pressure energy by this pressure chamber, and at the same time, another system is used. It is led to the pressure chamber via the suction channel. The fluid guided to the pressure chamber via the two paths is discharged from the drain through the guide passage by the rotation of the centrifugal blade. Thereby, a fluid can be sent efficiently. In this case, the centrifugal blade rotating integrally with the axial flow blade receives the pressure of the fluid sent by the axial flow blade and the pressure of the fluid sucked from the suction flow path, but in a direction in which the bidirectional pressures cancel each other. Since it acts, the thrust load given to the rotor by the fluid can be reduced, and the loss can be reduced.

According to a twenty-fourth aspect of the present invention, in the swimming assist device according to the twenty-third aspect, in the in-line type electric pump, a connection portion between the guide passage and the pressure chamber has an energy of a flowing fluid of the rotor. It is determined to be substantially equal at a symmetric position about the axis.

Therefore, the radial load on the rotor can be reduced. The fluid energy is energy that can be represented by the product of the flow velocity and the pressure of the fluid.

According to a twenty-fifth aspect of the present invention, there is provided the swimming assist device according to any one of the sixteenth to twenty-fourth aspects, wherein the band portion includes a band-shaped abdomen band attached to a human abdomen;
A fixed portion having a hook portion provided at one end of the band and a catcher provided at the other end of the band to detachably lock the hook portion.

Therefore, the swimming assist device is attached to the human abdomen by locking the hook portion to the catcher with the abdomen band wrapped around the abdomen.

According to a twenty-sixth aspect of the present invention, there is provided the swimming assist device according to any one of the sixteenth to twenty-fifth aspects, wherein the electric pump, the drive control circuit, and the power storage unit are housed in a single casing. It is provided integrally.

Thus, the swimming assist device can be assembled simply by providing a single casing on the band portion.

According to a twenty-seventh aspect of the present invention, there is provided the swimming assist device according to any one of the sixteenth to twenty-sixth aspects, wherein the electric pump is provided on the abdomen side of a human body in a state where the band portion is mounted on a human. It is provided on the band part so as to be positioned.

Therefore, a propulsive force is generated on the abdomen side.

The invention according to claim 28 is the swimming assist device according to any one of claims 16 to 27, further comprising an additional function unit provided in the band unit, wherein the additional function unit is installed. A fluid storage chamber for storing and holding the fluid,
A supply / discharge port for communicating the fluid storage chamber with the outside; and an opening / closing valve for closing the fluid storage chamber by covering the supply / discharge port so as to be openable and closable. Here, “fluid” is
This is a broad concept including powders and powders, and even solids that can be supplied and discharged from the supply and discharge ports.

Therefore, by opening and closing the open / close valve, it is possible to supply / discharge air, liquid, powder, etc. from the supply / discharge port to the fluid storage chamber. When air is hermetically stored in the fluid storage chamber, buoyancy against water is generated, and it is possible to float a person wearing the swimming aid on the water surface. Further, when liquids, powders, and the like are hermetically stored in the fluid storage chamber, it becomes easy to sink in the water, and assists a person wearing the swimming aid in swimming underwater.

The invention according to claim 29 is the swimming assist device according to claim 28, wherein the additional function unit is detachably provided on the band unit.

Therefore, by attaching the additional function section to the band section detachably, it becomes possible to easily and quickly attach the additional function section having various functions to the band section.

[0072]

Embodiments of the present invention will be described with reference to the drawings.

[First Embodiment] FIG. 1 is a perspective view showing the overall appearance of a swimming assist device, and 101 is a hull as a base. The hull 101 has a width approximately equal to the width of a person's shoulders, and a length large enough to carry an upper body, and is easily transportable.

In the center of the hull 101, FIG.
As shown in the A sectional view, a hold 103 capable of storing a battery 102 is provided, and a lid 104 is provided on the hold 103 so as to prevent water from entering the hold 103 by rubber packing or the like. . The battery 102
Is located near the center of gravity of the ship. The battery 102 housed in the hold 103 holds the battery 10
The removal becomes possible by removing 4.

Recesses 10 are provided on both sides in front of the hull 101.
5a and 105b are formed, and the recesses 105a and 105b are formed.
As shown in the BB cross-sectional view in FIG. 6, the grip portions 106a and 106b are provided for a person to grasp by hand, and can be easily operated with the thumb as an operation portion near the grip portions 106b and 106b. Push-type operation button 1
07a and 107b are provided.

At the center of the front upper surface of the hull 101, the remaining capacity of the battery is displayed as a display device.
In addition, an indicator 108 is provided for displaying a warning when the remaining capacity becomes a certain value or less, and for displaying the speed of the hull. Further, a drain port 109 of a water flow propulsion type electric pump 110 described later is provided on both left and right sides of the rear surface of the hull 101.
a, 109b are provided.

FIG. 3 is a partially cutaway view showing an arrangement state of the electric pump 110 of the swimming assist device, and FIG. 4 is a partially enlarged view of the cutout portion.
Are provided on the left and right sides of the ship, respectively. In addition, in the figure, only the electric pump 110 arranged on the left side is shown.

Then, as shown in FIG.
The water inlets 111a, 11
1b, and filters 112a and 112b for preventing foreign matter from entering are attached to the water inlets 111a and 111b. Then, the operation of the electric pump 110 sucks water from the water suction port 111 a, sends the sucked water to the electric pump 110 via the guide water channel 113, and sends the water to the drain port 109 via the electric pump 110.
The water is drained from a. In addition, the operation of the other electric pump (not shown) sucks water from the water suction port 111b, sends the sucked water to the electric pump via a guide waterway (not shown), and passes through the electric pump. Thus, the water is drained from the drain port 109b. Then, the two drain ports 109a, 109
Propulsion is obtained by the water pressure at the time of drainage from b.

In the electric pump 110, as shown in FIG. 7, a rotor assembly 122 is rotatably housed within an inner diameter of an annular stator assembly 121. The stator assembly 1
21 is provided with a stator core 123 provided with, for example, six magnetic poles of the same shape at a pitch of 60 degrees.
The excitation winding 124 is sequentially connected to each of the magnetic poles 3 in the counterclockwise direction.
It is wound as a phase, a B phase, a C phase, an A phase, a B phase, and a C phase. Then, each phase is wired in a Y-connection or a し -connection, and three lead wires are drawn out, and the entire inner surface and the inside of the stator assembly 121 are molded with an insulating resin 125 such as polyester to be waterproof. Processing. A three-phase alternating current having a phase difference of 120 degrees is applied to each lead wire, and the rotation speed can be varied by changing the frequency.

The rotor assembly 122 has a rotor core 126 having a four-pole salient pole structure fixed to a rotor shaft 128 rotatably supported by a pair of resin or ceramic sleeve bearings 127. Each sleeve bearing 127
Are incorporated in a pair of support members 129 provided on the non-core portions on both sides of the rotor core 126 with the rotor core 126 at the center.
Each of the support members 129 has a cylindrical shape with one end closed and the other end opened.
The rotor shaft 128 is inserted through the opening at the other end and inserted into the sleeve bearing 127.

Each of the support members 129 has four rectifying plates 130 fixed to the outer periphery thereof at equal intervals in the circumferential direction, and a part of the leading end of each rectifying plate 130 is fitted to the inner diameter of the stator assembly 121. It is fixed to the fixed cylindrical member 131. That is, each support member 129 is supported by each straightening plate 130 on the cylindrical member 131.

The rotor core 126 is composed of a pair of I-shaped salient pole cores 132a and 132b having a laminated structure in which a plurality of substantially I-shaped core pieces are laminated and the laminating positions thereof are slightly shifted from each other. , 132b between the pole cores 132a, 132b in the axial direction of the rotor shaft 128. The rotor core has a four-pole salient pole structure stacked in a cross shape through permanent magnets 133 magnetized vertically. Recess 134
Are formed, and the inner diameter of the stator assembly 121 and the concave portion 134 form an axial flow path.

In this manner, in a state where the rotor assembly 122 is incorporated in the stator assembly 121 and a pair of cylindrical members 131 supporting the support members 129 by the rectifying plates 130 from both sides are incorporated, each of the cylindrical members 131 is made of rubber. The liquid inflow guide 136 and the liquid outflow guide 137 made of a thermoplastic resin are held by the end faces of the thermoplastic resin through a simple sealing member 135, and these guides 136, 137 are fixed to the stator assembly 1
21 is integrated by welding. The leading end of the liquid inflow guide 136 communicates with the guide channel 113, and the liquid outflow guide 137 has a drain port 109a at the start.

The other electric pump (not shown) has the same configuration, and the tip of the liquid outflow guide is the drain port 109b.

FIG. 8 is a circuit diagram showing the structure of a control means for controlling the power of one electric pump 110. A variable resistor 141 for changing the resistance value by pressing the operation button 107a is provided, and a triangular wave voltage is generated. A triangular wave generation circuit 142 is provided. The variable resistor 141
Has one end connected to the + 12V terminal of the battery 102 and the other end grounded.
The voltage level of the output voltage signal e ₀ is set to decrease when the pressed state of “a” is large.

The voltage signal e ₀ from the variable resistor 141
Is input to an inverting input terminal (−) of a comparator 144 via a resistor 143 and the triangular wave generation circuit 142
Is input to the non-inverting input terminal (+) of the comparator 144 via the resistor 145.
The output of the comparator 144 is input to the base of an NPN transistor 146.

The transistor 146 has its collector connected to the -10 V terminal of the battery 102 via the resistor 147 and to the input terminal of the gate control circuit 148, and its emitter grounded. The gate control circuit 148 has an output terminal connected to the gate of the MOSFET 149. The electric pump 110 is connected between the +12 V terminal of the battery 102 and the ground via the FET 149. The gate control circuit 148
When the input voltage to the input terminal becomes 0 V, the FET1
A high-level signal is supplied to the gate of the FET 49 and its FET 1
49 is turned on.

Although the configuration of the control means for controlling the power of one electric pump 110 has been described here, the control means for controlling the power of the other electric pump has the same circuit configuration diagram.

In the swimming assist device having such a structure, the sea
Float the hull 101 on a river, etc.
On each grip part 106a, 106b to the left
Hold the right hand, for example, the operation button 107 with the left thumb
When a is pressed, the power supply from the battery 102 is
Is started and the voltage signal e is output from the variable resistor 141. ₀ 
Is generated and supplied to the comparator 144. Compare
Data 144 is a voltage signal e₀ Voltage level and triangular wave generation times
Comparing the voltage levels of the triangular wave voltage signals from path 142,
The voltage level of the triangular wave voltage signal is the voltage signal e₀ Voltage level of
The high level signal of transistor 146
To the base to turn on the transistor 146.
You.

When the transistor 146 turns on, the input voltage to the gate control circuit 148 becomes 0 V. At this time, the gate control circuit 148 supplies a high level signal to the FET 149 to turn on the FET 149. FET1
When the 49 is turned on, the electric pump 110
2 and receive power supply.

When electric power is supplied, the electric pump 110
Rotates the rotor core 126 by sequentially exciting each phase coil of the stator core 123. When the rotor core 126 rotates, the axial flow blade formed by the concave portion 134 of the rotor core 126 rotates, and water is sucked from the water suction port 111a and flows into the electric pump 110 via the guide water passage 113.

In the electric pump 110, as shown by the arrow in FIG. 7, water flows in from the liquid inflow guide 136, passes between the respective flow regulating plates 130 on the inlet side, and then flows into the rotor core 126.
Through the recess 134, and then flows out between the respective flow regulating plates 130 on the outlet side to the liquid outflow guide 137, where
It is discharged to the outside from 9a. This operation is the same for the other electric pump.
When the pressing operation is performed on 7b, the other electric pump operates, and the water sucked in from the water suction port 111b passes through the other electric pump and is discharged vigorously from the drain port 109b.

Thus, a propulsive force is generated, and the hull 101 moves forward on the water. Then, the operation button 107
a (107b) when the pressed state is shallow, the variable resistor 1
Since the voltage level of the voltage signal e ₀ output from 41 is as high as e _{01 as} shown by the solid line in FIG. 9A, the period during which the voltage level of the triangular wave voltage signal is equal to or higher than the voltage level e _{01 of the} voltage signal is short. The output waveform from the comparator 144 is a signal in which a pulse waveform having a narrow pulse width is repeated at a constant cycle as shown in FIG. Therefore, at this time, the amount of electric power supplied to the electric pump 110 is small, the rotation speed of the electric pump 110 is low, and the generated thrust is small.

The operation buttons 107a (107b)
When the pressed state is deepened, the output from the variable resistor 141 is output.
Voltage signal e₀ Are indicated by dotted lines in FIG.
Like e₀₂The voltage level of the triangular wave voltage signal.
Is the voltage level e of the voltage signal. ₀₂The period of the above is long
The output waveform from the comparator 144 is shown in FIG.
As shown in the figure, the pulse waveform with a wide pulse width
The signal is repeated. Therefore, at this time,
The amount of power supplied to the pump 110 increases, and the electric pump 1
10 has a high rotational speed, and therefore generates a large propulsive force.
It becomes.

As described above, the left and right operation buttons 107a, 1
07b is operated with the thumb and the amount of operation is varied to control the width of the pulse supplied to the electric pump, so that the propulsive forces of the left and right electric pumps can be individually varied.
It is possible to freely change the speed of No. 01 and turn left and right. Therefore, it can be easily used by ordinary people in a sea bath or the like without training, and the utility as a recreational device or a sports device is high, and the practicality can be improved. The hull 10
The size of the upper part of a person's upper body can be 1
Since a small electric pump can be used as the electric pump for generating the propulsion force, the size and the price can be reduced as a whole.

Also, since the indicator 108 is arranged at the center of the front upper surface of the hull 101, when the upper body is placed on the stomach on the hull 101, the indicator 108 is in the position of the line of sight, and accordingly, the state of the speed is changed. It is possible to always easily confirm by the indicator 108 and to easily confirm the warning display when the remaining capacity of the battery 102 becomes a certain value or less.

Also, since the battery 102 is arranged near the center of gravity of the hull 101 and the water intakes 111a and 111b are arranged on the bottom surface near the left and right positions of the center of gravity of the hull 101, weight is applied to the rear of the hull 101. Also hull 101
The center of gravity of the hull moves only slightly backward, so that the front of the hull does not rise, and water can always be reliably sucked from the water intake ports 111a and 111b, and a stable propulsion force can be obtained.

Further, since the battery 102 is housed in the hold 103 and the lid 104 is put on the battery 102, the upper surface of the hull 101 can be made flush with the whole. The battery compartment does not get in the way. In addition, since filters 112a and 112b for preventing foreign matter from entering are installed in the water inlets 111a and 111b,
There is no possibility that the electric pump 110 will break down due to the entry of foreign matter.

The electric pump 110 shown in FIG.
Alternatively, various in-line electric pumps P shown in FIG. 30 can be used.

[Second Embodiment] The same parts as those in the above-described embodiment are denoted by the same reference numerals, and different parts will be described.

As shown in FIG. 10, one electric pump 1 is mounted on the hull located on the center line behind the hull 101.
61 are arranged. The left and right water intakes 111a,
The water sucked in from 111b is introduced into each guide waterway 113.
The liquid is supplied to the liquid inflow guide of the electric pump 161 through the a and 113b. The electric pump 16
Reference numeral 1 denotes a structure in which water sucked from a liquid inflow guide passes through the inside and is discharged from a liquid outflow guide to the outside through a drain port 109 by rotation. The configuration of the drive circuit for driving the electric pump 161 is the same as that of the above-described embodiment. The operation buttons are provided in any of the vicinity of the left and right grip portions. Other configurations are the same as those of the above-described embodiment.

In this embodiment, the electric pump 1
Since there is only one 61, left and right turning is performed by moving the weight of the person to the left and right and / or moving the lower body and the legs to the left and right. The speed control is performed by operating the operation buttons.

Therefore, in this embodiment, the same operation and effect as those of the above-described embodiment can be obtained.

In each of the embodiments described above, a case has been described in which the electric pump is rotated in one direction, water is sucked in from the water intake port and drained from the drain port. However, the electric pump can be rotated in the reverse direction. If the suction and drainage of the water flow are devised, the hull can be moved in the opposite direction by the reverse rotation of the electric pump.

The electric pump 110 shown in FIG.
Alternatively, various in-line electric pumps P shown in FIG. 30 can be used.

[Third Embodiment] A third embodiment of the present invention will be described with reference to FIGS. First, FIG. 11 is a perspective view showing the overall appearance. The width of the main body 201 as a base is approximately the width of a human shoulder, and the length is set to a size smaller than the upper body. A U-shaped handle 202 for grasping a person is attached to the left and right sides of the main body 201, and water intake ports 203 are provided at two lower front portions of the main body 201. A supply / exhaust port 204 for supplying / exhausting outside air is formed at an upper portion of the main body 201.

FIG. 12 is a perspective view seen from above from the rear.
The drain port 205 is located at the center of the rear lower center of the main body 201.
It is provided in several places. In the upper part of the drain 205,
An open / close switch 206 for opening and closing the drain 205 is provided. The open / close switch 206 includes an open / close valve 207 that moves up and down to open and close the drain port 205, and a knob 208 that is formed integrally with the open / close valve 207.

FIG. 13 is a vertical sectional side view of the main body 201, in which a battery 209 is disposed at a lower front part of the main body 201, and a motor 210 and an electric pump chamber 211 are disposed at a lower rear part. An integrated electric pump 212 is provided. The electric pump 212 is
If the rotation direction of 0 is switched between forward and reverse, the flow direction of the fluid is reversed. The battery 209
In the left and right space portions, water is guided from the water inlet 203.
A suction pipe 213 is arranged, merges into one in front of the electric pump 212, and the drain port 205 is connected to a drain side of the electric pump 212 to form a flow path 214.

When the electric pump 212 is rotated in the forward direction, water is removed from the front filter 2 provided near the water intake 203.
15 through the suction pipe 213 and the electric pump 2
12, the water is discharged from the drain 205 through a rear filter 216 provided on the exhaust side of the electric pump 212. A propulsive force is obtained as a reaction of the suction and discharge fluids. When it is necessary to find an obstacle in front and stop suddenly, the rotation direction of the motor 210 is reversed by operating the handle 202 as described later, and water is caused to flow from the drain 205 to the water intake 203. It is designed to obtain reverse thrust.

Next, a support wall 217 is provided at an intermediate portion of the main body 201, and an upper half of the support wall 217 is provided with:
A buoyancy control chamber 218 is provided. FIG.
A foamed material 219 is disposed above and below the support wall 217 of the main body 201, and an empty chamber constituting the buoyancy control chamber 218 is provided in the center. Have been. The buoyancy control chamber 21 comprising the vacant space
8 is filled with water, so that only the air supply / exhaust port 204 and a part of the upper part of the main body 201 rise to the surface of the water.
1 is slightly larger than zero, and when the water is discharged from the buoyancy control chamber 218 and only the air is supplied and the supply / exhaust port 204 is capped 220, the main body 201
The buoyancy can be adjusted until the apparent specific gravity of the whole becomes close to 0.5. At this time, the vacancy volume of the buoyancy control chamber 218 is adjusted by the foam material 219 so that the waterline is near the middle position of the main body 201.

Therefore, water injection into the buoyancy control chamber 218
When the drain port 205 is closed by the open / close switch 206 of the drain port 205 and the electric pump 212 is rotated forward, the water supply / drain port 221 formed so as to communicate with the buoyancy control chamber 218.
And the inside of the buoyancy control chamber 218 can be filled with water. Conversely, if the electric pump 212 is rotated in the reverse direction, water can be extracted from the buoyancy control chamber 218.

FIG. 15 is a cross-sectional view of a portion where the handle 202 is provided.
And a support plate 223 provided inside the main body 201. Specifically, a small-diameter portion 225 divided by a step portion 224 is formed at each end of the handle 202, and the small-diameter portion 225 is fitted to the support plate 223, and the step portion 224 and the support Board 2
23, and between the support plate 223 and the small-diameter portion 22.
The coil springs 227 and 28 are respectively attached between the flange portion 226 provided at the tip of the handle 5 and the handle 202 is located at the neutral position.

Grasp the left and right handles 202 with both hands,
When it is pressed toward the body 201, that is, toward the center,
The outer coil spring 227 between the support plate 223 and the step 224 of the handle 202 is compressed, and the flange 226 at the tip of the handle 202 is displaced toward the center. Also,
When the user grips the left and right handles 202 and expands them outward, the inner coil spring 228 provided between the support plate 223 and the flange 226 at the tip of the handle 202 is compressed, and the flange at the tip of the handle 202 is compressed. Part 226
Is displaced in the outer peripheral direction. This displacement is detected by a detection unit 229 fixed to one of the support plates 223. The detection unit 229 is configured by well-known light, magnetism, or mechanical means linked to the movement thereof, and controls the rotation speed of the motor 210 by the rotation control means 230 described later shown in FIG. are doing. In an equilibrium position as shown in FIG. 15 in a state where no lateral force is applied to the handle 202, the motor 210 is stopped. When the handle 202 is moved inward, the larger the displacement from the equilibrium position, the faster the rotation speed of the electric pump 212 in the forward rotation direction, and conversely, the wider the handle 202 is in the outer circumferential direction. At times, the larger the displacement from the equilibrium position, the faster the rotation speed of the electric pump 212 in the reverse rotation direction.

Next, the rotation control means 2 will be described with reference to FIG.
Thirty specific circuits will be described. First, four transistors 231 and 23 connected in series and parallel, respectively.
2, 233 and 234 are provided, and the transistor 23 is provided.
The connection midpoint between 1, 232 is connected to the connection point a of the motor 210, and the connection midpoint between the transistors 233, 234 is connected to the connection point b of the motor 210. further,
The collectors of the transistors 231 and 233 have 12
V power supply is connected. Further, transistors 235 and 236 connected to a 12V power supply are provided, and collectors P ₁ and P _{2 of} these transistors 235 and 236 are provided.
Are connected to the bases of the transistors 231 and 234 and the transistors 232 and 233. The emitters of the transistors 235 and 236 are grounded, and the bases thereof are comparators 237 and 237, respectively.
38 are connected. These comparators 237,
On the input side of 238, variable resistors 239 and 240 and triangular wave generation circuits 241 and 242 connected to a 12V power supply are connected. The variable resistors 239 and 240
Are connected by an interlocking circuit (not shown) so as to change the resistance value according to the movement of the handle 202 inward or outward by the detection unit 229.

In order to operate such a main body 201, an appropriate amount of water is injected into the buoyancy control chamber 218 by the above-described method, and the open / close switch 206 is operated to open the drain port 205. When the left and right handles 202 are firmly gripped and contracted inward, they are propelled forward. Handle 202
Is tilted forward, the main body 201 dives underwater, and conversely, if it is tilted backward, it floats out of the water. In addition, if only one of the water suction ports 203 in front of the main body 201 is selectively closed, it can be turned. If the hand is released from the handle 202, the handle 202 returns to the equilibrium position, the motor 210 stops, and the main body 201 floats on the water surface because the entire buoyancy is zero or more. And can be collected safely. By moving the handle 202 back and forth during forward movement, it is possible to turn in any direction. If it is necessary to find an obstacle ahead and stop suddenly while driving at high speed, the steering wheel 202 can be expanded left and right to rotate the motor 210 in the reverse direction to stop suddenly. The water in the buoyancy control chamber 218 can be drained and adjusted so that the body can be put on the main body 201 on the water to enjoy driving or to rest using the buoyancy.

The operation of the rotation control means 230 in the case of causing the vehicle to move forward and backward will now be described. First, when the motor 210 is rotated forward to move forward, the value of the variable resistor 239 changes due to the inward movement of the handle 202, the output voltage e ₀ increases, and the value of the variable resistor 240 changes. As a result, the output voltage e ₀ decreases. The output voltage e ₀ and the voltage of the triangular wave generation circuits 241 and 242 are
7, 238, the output voltage e _{0 of} which is higher than the voltage of the triangular wave generation circuit 241.
A low voltage is output to the base of the
₁ becomes a predetermined voltage based on the 12V power supply, and the transistors 231 and 232 are turned on. Similarly, the variable resistor 24
The output voltage e ₀ of 0 is the base to output a high voltage of lower transistor 236 than the voltage of the triangular wave generating circuit 242, its collector voltage P ₂ becomes a zero voltage, the transistor 232 and 233 is turned off. Thereby, the motor 21
A current flows from the connection point a of 0 to the connection point b, and the motor 210 rotates forward.

Then, when the handle 202 is expanded outward, the motor 210 is rotated in the reverse direction. That is, the value of the variable resistor 240 changes and the output voltage e ₀ increases, and the value of the variable resistor 239 changes and the output voltage e ₀ decreases.
The output voltage e ₀ and the voltages of the triangular wave generation circuits 241 and 242 are compared by comparators 237 and 238,
Its output voltage e ₀ is low voltage is output to the base of the higher transistor 236 than the voltage of the triangular wave generating circuit 242, its collector voltage P ₂ becomes a predetermined voltage based on the 12V power source, the transistor 232 and 233 are turned on.
Similarly, a high voltage is output to the base of the transistor 235 in which the output voltage e ₀ of the variable resistor 239 is lower than the voltage of the triangular wave generation circuit 241, the collector voltage P ₁ becomes zero voltage, and the transistors 231 and 234 are turned off. I do.
Thus, a current flows from the connection point b of the motor 210 to the connection point a, and the motor 210 rotates in the reverse direction.

The electric pump 212 is shown in FIG.
Alternatively, various in-line electric pumps P shown in FIG. 30 can be used.

[Fourth Embodiment] A fourth embodiment of the present invention will be described with reference to FIG. 1 to 17
The same parts as those described above are denoted by the same reference numerals and description thereof is omitted. The electric pump in the present embodiment is a conventional one-way rotary electric pump, in which a suction port 46 is provided below a centrifugal fan 45 directly connected to an output shaft 44 of a motor 43, and a drainage port is provided behind the main body 201. A mouth 205 is provided.

In such a configuration, when the motor 43 is driven, a force is exerted to draw the back into the water, so that a vertical movement occurs, and the movement can be enjoyed.

[Fifth Embodiment] Next, a fifth embodiment of the present invention will be described with reference to FIG. That is, the pipe 248 is provided inside the main body 201 via the valve 247.
The water inlet 20 formed in front of the main body 201
3. For this reason, in the state shown in FIG. 19, the drain 205 is closed by the open / close switch 206, the water sucked from the lower suction port 246 is prevented from flowing out from the drain 205, and the water is led forward to guide the water suction 203 From the front to perform a braking action.

The electric pump 212 is shown in FIG.
Alternatively, various in-line electric pumps P shown in FIG. 30 can be used.

[Sixth Embodiment] A sixth embodiment of the present invention will be described with reference to FIGS.

[Outline of Swimming Assisting Device] FIG. 20 is a perspective view of the whole. The swimming assistance device 1101 of the present embodiment
Band portion 1102 as a base to be attached to human abdomen
In addition, an in-line electric pump P as an electric pump,
A power supply storage unit 110 for storing the drive control circuit (not shown) and a power supply (not shown) for the drive control circuit in an airtight state.
3 and an additional function unit 1104 are attached.

Band portions 1102 are provided with hook portions 110 at both ends of an abdominal band 1105 suitable for wearing on a human abdomen.
6 and a catcher 1107 are attached. The hook portion 1106 includes a pair of hooks 1108 which are elastically deformed in the band width direction of the abdominal band 1105, and the catcher 1107 has a structure for engaging and disengaging the hooks 1108.

The in-line type electric pump P, the drive control circuit, and the power supply are integrally formed with the casing 110.
9 is held. The casing 1109 has an electric pump housing 1110 for housing and holding the inline electric pump P located at the center thereof, and a drive control circuit which is located at one side of the electric pump housing 1110 and hermetically accommodates the drive control circuit. And a power storage unit 1103 which is located on the other side of the electric pump storage unit 1110 and stores the power in an airtight state. Of these parts, only the electric pump housing part 1110 is formed to protrude outward with respect to the other parts. The casing 1109 has such a shape that its inner shape fits the shape of the human abdomen. That is, the casing 1109 is attached to the band portion 1102 so as to be located on the abdomen side of the person with the band portion 1102 attached to the human body.

Further, as shown in FIG. 20, a water absorption hole 1112 is formed in one end in the band width direction of the belly band 1105, and a drain hole (not shown) is formed in the other side in the electric pump storage portion 1110. I have. These water absorption holes 1112 and drain holes are formed corresponding to the water absorption port 317 and the drain port 319 formed in the in-line electric pump P, respectively. The circuit housing 1111 is provided with a power switch 1113 for operating and controlling power supply from a power supply to the drive control circuit.

The additional function unit 1104 includes a band unit 1102
Is detachably attached to the abdominal band band 1105 of FIG. The additional function unit 1104 includes a fluid storage chamber 1114 that stores and holds the introduced fluid in an airtight state as a main component. In this fluid storage chamber 1114,
A supply / exhaust port 1115 for communicating the inside with the outside is provided.
An opening / closing valve 1116 that seals the fluid accommodating chamber 1114 by opening and closing the cover 115 is detachably attached. Therefore, a fluid such as air or water, a powder, a powdery material, or the like is supplied to the additional function unit 1104 having such a configuration from the supply / discharge port 1115 by attaching and detaching the on / off valve 1116 as needed. It can be stored in the storage room 1114 in a closed state.

Next, examples of various in-line electric pumps P usable in this embodiment will be described below.

[Embodiment of In-Line Electric Pump P] A first embodiment of the in-line electric pump P will be described with reference to FIGS. 21 is a vertical sectional side view of the in-line electric pump P1, FIG. 22 is a sectional view taken along line AA of FIG. 21, and FIG. 23 is a vertical sectional side view showing a part of the rotor.

In FIG. 21, reference numeral 301 denotes a motor.
The motor 301 includes a cylindrical stator 302 and a rotor 303. Stator 302 has a stator core 304 formed by laminating annular iron cores.
And a coil 305 wound around the stator core 304
And a resin layer 306 that covers the coil 305 together with the end face of the stator core 304.

The rotor 303 has an axial flow blade 308 fixedly provided with a rotation shaft 307 at the center, and a magnetic pole 309 provided on a part of the outer periphery of the axial flow blade 308. The axial flow blade 308 in the present embodiment has a spiral groove 311 formed on the outer periphery of a cylindrical body 310, and as shown in FIG.
The width w and the depth h of the spiral groove 311 are set to substantially equal values.

A flange 312 is provided at one end of the stator 302.
Has been fixed. The flange 312 has a dome-shaped support portion 314 for supporting the bearing 313 and an opening 315 opening around the support portion 314, and a plurality of rectifying plates 316 are radially formed in the opening 315. ing.

A water inlet 318 having a water inlet 317 for sucking a fluid is fixed to the surface of the flange 312. On the periphery of the other end of the stator 302, the drain port 31 is provided.
9 is fixedly joined to the periphery of a cup-shaped drain port body 320 having a partition wall 321.
Is provided. This partition wall 321 is a drain port body 320.
However, it may be formed by a separate member and fixed to the drain port body 320. A first pressure chamber 322 is formed between the partition wall 321 and the ends of the stator 302 and the rotor 303, and a second pressure chamber 323 is formed between the partition wall 321 and the drain port 319. These pressure chambers 322 and 323 are connected by a plurality of guide holes 324 formed on the outer peripheral portion of the partition wall 321. At the center of these guide holes 324, as shown in FIG. 22, ribs 3 connecting the inner peripheral surface of drainage body 320 and the outer peripheral edge of partition wall 321.
25 are provided. The inclination angles of the axial flow blades 308 with respect to the rotation shaft 307 are determined so that the ribs 325 can correct the flow of the fluid in the swirling direction in the axial flow direction.

Further, as shown in FIG.
A support portion 327 that supports the outer periphery of the slide bearing 326 and a leak flow path 328 that communicates the second pressure chamber 323 and the inner peripheral surface of the slide bearing 326 are formed at the center of the slide bearing 326.

The rotating shaft 307 of the rotor 303 is rotatably supported by a bearing 313 and a sliding bearing 326. Further, the diameter of the concave portion (the bottom of the spiral groove 311 in this example) of the axial flow blade 308 whose radius around the axis (rotation center) of the rotor 303 is minimum is the support portion 32.
The diameter is larger than the diameter of 7.

In such a configuration, when the water suction port 317 is connected to the fluid supply source, the drain port 319 is connected to the fluid supply destination, and a current flows through the coil 305, the motor 301 is driven. That is, the rotor 303 having the axial flow blade 308 rotates. As a result, the fluid is sucked in from the water suction port 317, is rectified by the rectifying plate 316 formed in the opening 315 of the flange 312, is sent to the first pressure chamber 322 by the axial flow blade 308, and is further fed through the guide hole 324. The water is discharged from the drain port 319 via the second pressure chamber 323. In this case, although the fluid is sent while rotating by the rotation of the axial flow blade 308, the rotational kinetic energy is converted into static pressure energy in the first pressure chamber 322, so that the fluid can be efficiently sent out from the drain port 319. it can.

That is, the rotational speed of the fluid discharged from the spiral groove 311 becomes lower as the radius of the rotation becomes closer to the outer circumference, and the difference in the speed of the kinetic energy is converted into pressure.

In the present embodiment, a sliding bearing 326 is provided at the center of the partition wall 321 to rotatably support the rotating shaft 307 of the rotor 303 with a predetermined clearance, and the partition wall 321 has a second pressure. Since a leakage flow path 328 that connects the chamber 323 and the inner peripheral surface of the slide bearing 326 is formed, the fluid in the second pressure chamber 323 flows between the rotation shaft 307 of the rotor 303 and the slide bearing 326. Intervene with a uniform pressure distribution. Therefore, the rotation shaft 307
Lubrication can be maintained well over a long period of time.

Further, in the present embodiment, the rotor 303
The diameter of the concave portion (the bottom of the spiral groove 311 in this example) of the axial flow blade 308 whose radius centered on the axis of
Since the diameter is set to be larger than the diameter of 27, the fluid can be easily guided toward the outside of the first pressure chamber 322 in which the guide hole 324 is formed. 32 that supports the sliding bearing 326
7 can be reduced.

The concave portion of the axial flow blade that is larger than the diameter of the support portion 327 is not limited to the above example.
For example, as described in JP-A-10-246193, a plurality of core pieces are laminated to include a concave portion in an axial flow blade having salient poles and concave portions. Also,
In the case where an axial flow blade called a screw or an impeller having a plurality of inclined blades is used, the root of the blade with respect to the rotating shaft is a concave portion.

That is, to make the diameter of the concave portion of the axial flow blade larger than the diameter of the support portion 327, in other words, to increase the diameter of the axial flow blade so that the fluid can easily flow radially outward of the support portion 327. That is, the size and shape are determined. The axial blade 308 satisfies this condition. By using the axial blade 308, it is possible to reduce the loss due to collision between the sent fluid and the support portion 327 supporting the slide bearing 326.

As shown in FIG. 23, the axial flow blade 308 is formed by forming a spiral groove 311 on the outer periphery of a cylindrical body 310. In this case, as w and h are made as large as possible, the flow path resistance is reduced and the efficiency is improved. However, when h is kept constant, the larger the value of w such that w> h, the more the turbulent flow returns to the suction side behind the spiral groove 311 in the rotational direction of the spiral groove 311 as the laminar flow state is disturbed. Efficiency decreases. Also, w
In the case of <h, the above-mentioned turbulence does not occur, but the flow path resistance increases and the efficiency decreases. However, in the present embodiment, since the width w and the depth h of the spiral groove 311 are set to substantially equal values, the fluid can be sent more efficiently.

Next, a second embodiment of the in-line electric pump P will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 24 is a vertical sectional side view of the in-line electric pump P2.

In the in-line type electric pump P2 according to the present embodiment, the rotary shaft 307 of the rotor 303 extends to the second pressure chamber 323, and the second axial flow blade 329 is fixedly provided at the extending portion. Have been. The second axial blade 329 uses an axial impeller having a plurality of blades.

With such a configuration, the stator 302
Axial flow blade 308 provided inside the second pressure chamber 3
The pressure can be dispersed and the fluid can be sent by the second axial flow blade 329 provided in the nozzle 23. Also, the motor 301
Power can also be dispersed. By doing so, the rotor 3
When the 03 is downsized, the second axial vane 329 can compensate for the decrease in the fluid feeding performance of the axial vane 308. Thus, the fluid can be efficiently sent while satisfying the miniaturization of the motor 301.

Next, a third embodiment of the in-line electric pump P will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 25 is a vertical sectional side view of the in-line electric pump P3, and FIG. 26 is an in-line electric pump P3 shown in FIG.
FIG. 5 is a longitudinal sectional side view as viewed from a direction different by 90 degrees.

The motor 301 in this embodiment has a cylinder 330 that covers the outer periphery of the stator 302. One end of this motor 301 (lower end in FIGS. 25 and 26)
Is fixed to the connection port 331. This connection port 3
Reference numeral 31 denotes a pressure chamber 332 that converts the rotational kinetic energy of the fluid sucked by the axial flow blades 308 of the rotor 303 into static pressure energy, and a pressure chamber 332 at an outer peripheral portion of the pressure chamber 332 from a position separated by 180 degrees. And two pipe-shaped guide channels 333 protruding from each other. These guide channels 333 are merged on an extension of the center of the rotor 303, and a drain port 319 is formed at the junction. The pressure chamber 332 is provided with a centrifugal blade 335 fixed to the lower end of the rotating shaft 307 of the rotor 303. One end of the rotating shaft 307 penetrating the centrifugal blade 335 is rotatably supported by a bearing 337 supported by a support portion 336 provided at the center of the connection port 331.

Reference numeral 38 denotes a suction case formed in a container shape. The opening surface of the suction case 338 is covered with a suction port body 340 having a water suction port 317 formed at the center. The motor 301 and part of the connection port 331 are housed in a suction case 338.

FIG. 27 is a bottom view of the in-line electric pump P3 viewed from the direction of arrow B in FIG. In the figure,
32a is a bottom surface of the pressure chamber 332, and this bottom surface 332a is formed in a disk shape in accordance with the bottom surface of the cylindrical motor 301, but only the guide flow path 333 is a suction case 338.
Is formed in such a size as to be exposed below the bottom.

A suction passage 341 for sucking fluid is formed between the outer periphery of the motor 301 and the outer periphery of the connection port 331 and the inner surface of the suction case 338. As shown by arrows in FIGS. 25 and 26, the suction flow path 341 allows the fluid suctioned from the water suction port 317 to flow through the stator 302.
Of the centrifugal blade 33
The path is set so as to be fed toward the surface opposite to the axial flow blade 308 of No. 5. That is, this suction channel 3
Reference numeral 41 denotes a connection portion 3 connected to two connection holes 342 formed symmetrically at the bottom of the pressure chamber 332 of the connection port body 331 with the center of the rotation shaft 307 interposed therebetween, as shown in FIG.
41a. As is apparent from FIG. 25, the connection portion 341a is disposed so as to pass through between the bottom surface 332a of the pressure chamber 332 of the connection port body 331 and the guide flow path 333.

In such a configuration, when the rotor 303 is rotated, the fluid sucked from the water inlet 317 flows to the rectifying plate 316 formed in the opening 315 of the flange 312.
And the pressure chamber 332 by the axial flow blade 308.
The rotational kinetic energy is converted to static pressure energy in the pressure chamber 332 and is guided to the pressure chamber 332 via a suction passage 341 of another system. The fluid guided to the pressure chamber 332 via these two paths is discharged from the drain port 319 via the guide flow path 333 by the rotation of the centrifugal blade 335. Thereby, a fluid can be sent efficiently.

In this case, the centrifugal blade 335 that rotates integrally with the axial flow blade 308 receives the pressure of the fluid sent by the axial flow blade 308 on the upper surface in FIGS. 25 and 26, and passes through the connection portion 341a of the suction flow path 341. The pressure of the sent fluid is received on the lower surface. That is, since the bidirectional pressures act in directions that cancel each other, the thrust load applied to the rotor 303 by the fluid can be reduced.

Further, most of the suction flow path 341 formed between the motor 301 and the outer periphery of the pressure chamber 332 has an annular shape and a uniform flow path cross-sectional area. The connecting portion 341a and the guide channel 333 of the connecting port body 331 constitute a rotating shaft 307 of the rotor 303.
Are formed with symmetrical shapes and dimensions at symmetrical positions about the axis of. That is, the suction flow path 341 and the guide flow path 333 are determined so that the energy of the flowing fluid is substantially equal at a symmetric position about the axis of the rotor 303. Therefore, the radial load on the rotor 303 can be reduced. Thereby, the bearing 313, the bearing 337, and the rotating shaft 3
07, the motor 301 can be smoothly rotated for a long period of time.

Next, a preferred embodiment of the in-line electric pump P will be described with reference to FIGS.
The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 28 is a longitudinal sectional side view of the in-line electric pump P4, and FIG. 29 is an in-line electric pump P4 shown in FIG.
FIG. 30 is a longitudinal sectional side view of FIG.
FIG. 8 is a view taken along line CC in FIG.

The in-line electric pump P of the present embodiment
4 has the same basic configuration as the in-line electric pump P3 introduced as the third embodiment. The only difference is the shape of the suction case 338. That is, the suction case 338 is connected to the water intake port 317 and the drain port 31.
The 9 side is formed in a smooth shape, and is formed so as to reduce the resistance of the fluid. In other respects, there is no difference from the in-line electric pump P introduced as the third embodiment, and the description thereof is omitted.

[Operation] The swimming assist device 11 of the present embodiment.
01 will be described.

The swimming assist device 1101 is shown in FIGS.
As shown in FIG.
The hook 1106 is locked to the catcher 1107 while being wound around the abdomen 1202 of the human body 1201.
Attached to. In this state, enter the water and turn on the power switch 1
By injecting 113, the in-line type electric pump P, which is an electric motor, is driven and controlled to start operation. Then, the water sucked in from the water suction port 317 is rectified by the rectifying plate 316 formed in the opening 315 of the flange 312, and is pumped by the axial flow blade 308 to be discharged from the drain port 319. At this time, each of the in-line electric pumps P from the first embodiment to the preferred embodiment described above is used.
Is used in the swimming assist device 1101 of the present embodiment, each of the in-line type electric pumps P operates as described above. As a result, a propulsive force is generated in the in-line electric pump P positioned on the abdomen 1202 of the human body 1201 to assist swimming and swimming.

When such a swimming / swimming assisting operation is performed by the swimming assisting device 1101, the swimming assisting device 1101 is used.
Is the torso of the human body 1201, more specifically, the abdomen 120
2, the limbs and waist movements required for swimming and swimming are not hindered. In particular, the various in-line electric pumps P used in the present embodiment are extremely highly efficient, and have a volume ratio to the conventional in-line electric pump of 1/3 to 3% to obtain the same output. 1
The fact that the size can be reduced to about / 5 is also a reason not to hinder the limb and waist movements required for swimming and swimming. In addition, the fluid storage chamber 1114 in the additional function unit 1104
The swimming assist device 1101 itself does not generate buoyancy unless air or the like is stored in the water, so that it can be used not only on the water surface but also in water. In other words, it can be used both as an aid when floating on the surface of the water and swimming (see FIG. 31) and as an aid when diving underwater and swimming (see FIG. 32).

When air is hermetically stored in the fluid storage chamber 1114 in the additional function unit 1104, the swimming assist device 1101 itself generates buoyancy against water. Therefore, when a beginner of swimming / swimming such as a child or an elderly person with weak muscles is used, the fluid storage chamber 111 is used.
By making air buoyant by hermetically storing air in 4, it is possible to enjoy safer swimming and swimming.

On the other hand, when water, sand, or the like is hermetically stored in the fluid storage chamber 1114 of the additional function unit 1104, the swimming assist device 1101 tries to sink itself into the water.
Therefore, as shown in FIG. 32, when used as an aid when diving underwater and swimming, the additional function unit 1104 is used.
In this case, water, sand, or the like may be sealed and stored in the fluid storage chamber 1114.

As described above, the swimming assist device 1101 of the present embodiment is used as a marine sport for beginners of swimming / swimming to get close to water, for practicing swimming, and for diving underwater. It is possible to cope with various uses, such as a use for a more advanced swimming with a base material of scuba diving attached.

[0163] In practice, a configuration may be adopted in which the device is attached to the chest, or a configuration in which the electric pump is carried on the back side.

[0164]

According to the present invention, downsizing and cost reduction can be realized and moreover, ordinary people can easily use it in sea bathing and the like without training, and the practicality can be improved.

The invention according to claim 8 forms a main body having a built-in battery and an electric pump operated by the battery, wherein the buoyancy is set slightly larger than zero and a handle for a person to grip is provided on the outer surface. Then, the electric pump is disposed in a flow path that communicates a water inlet formed at a lower part or a bottom part of a waterline in front of the main body part and a drainage port formed at a lower part of the waterline behind the main part, Since the propulsive force is generated by the reaction force of the water flow by the electric pump,
It can be significantly smaller and lighter than conventional ones,
It is easy to carry and store, and it is possible to provide an inexpensive device because propellers and reduction gears are unnecessary as in the past,
Furthermore, since there is no danger that the main body will sink to the bottom of the water and it will not be difficult to recover, and since it is possible to steer while holding the steering wheel, there is no need to release the hand, good steering performance is obtained, and safety is improved It has the effect of improving.

According to a ninth aspect of the present invention, in the swimming assist device according to the eighth aspect, since the electric pump is switchable between the water suction side and the drainage side, an obstacle suddenly moves forward during operation at the maximum speed. In an emergent emergency, a sudden brake can be applied to stop the vehicle quickly, thereby avoiding a collision and having an effect of greatly improving safety.

The invention according to claim 10 is the invention according to claim 8 or 9
In the described swim assist device, the electric pump is a swim assist device that can freely absorb and drain water having a main flow path in the motor, so that the flow path can be linearly arranged,
Since the flow path loss is reduced, there is an effect that the size of the battery can be reduced.

According to the eleventh aspect of the present invention, in the swimming assist device according to the eighth, ninth, or tenth aspect, a buoyancy adjusting chamber is provided in the main body so that the amount of loaded water can be adjusted. Slightly larger than 1 and easy to adjust for buoyancy, making it very large when propelled on water, easy to swim underwater, and draining all water to maximize buoyancy Thus, there is an effect that it is possible to stop and take a break instead of the buoy.

According to a twelfth aspect of the present invention, in the swimming assist device according to the eleventh aspect, the buoyancy adjusting chamber has a water supply / drain port communicating with a flow path provided with an electric pump and a supply / exhaust port communicating with outside air. Since it is formed, the buoyancy can be easily adjusted by driving the electric pump, and there is an effect that swimming underwater is facilitated.

According to a thirteenth aspect of the present invention, in the swimming assist device according to the eleventh or twelfth aspect, the buoyancy adjusting chamber is formed above the battery, so that the horizontal stability is high, and thus, it is possible to rotate in the water. Even when the vertical direction cannot be determined, the posture can be naturally corrected to the downward state, and there is an effect that the turning operation and the speed adjustment can be performed safely.

According to a fourteenth aspect of the present invention, in the swimming assist device according to the eighth, ninth, or tenth aspect, the motor of the electric pump is connected to rotation control means for controlling the increase / decrease of the rotation speed and the switching of the rotation direction. There is an effect that the adjustment of the traveling speed and the selection of the forward / backward movement can be easily performed.

According to a fifteenth aspect of the present invention, in the swimming assist device according to the fourteenth aspect, the handle of the main body is moved in the left-right direction, and the moving direction and the moving amount are used as inputs to the rotation control means to control the electric pump. Since the increase and decrease of the number of rotations of the motor and the switching of the rotation direction are controlled, there is an effect that the traveling speed can be easily adjusted and forward / reverse selection can be easily performed while holding the steering wheel.

A swimming apparatus according to a sixteenth aspect of the present invention has a band portion detachably attached to a human torso, and a water inlet and a drain port at both ends, and the band portion is attached to the human torso. An electric pump provided in the band portion such that the water intake port is located on the head side and the drain port is located on the leg side in a state in which the power supply is provided in an airtight state in the band portion. A driving control circuit for driving and controlling the electric pump, and a power storage unit provided in the band unit for storing the power supply for the driving circuit in an airtight state, so that the band unit is attached to a human body. By controlling the drive of the electric pump by the drive control circuit in the state in which the swimming / swimming operation is not hindered, and also on both the water surface and the water, it is possible to obtain the propulsive force of the electric pump,
Therefore, it is possible to cope with almighty for various uses.

The invention according to claim 17 is based on claims 1 and 2,
17. The swimming assist device according to 8 or 16, wherein the electric pump has an axial vane inside a cylindrical stator that sends out a fluid sucked in from the water intake port toward the drain port in an axial direction. Is an inline type electric pump provided rotatably, so that the positional relationship between the water intake port and the drain port is suitable as the electric pump of the present invention.

On the other hand, the in-line type electric pump having such a configuration imparts rotational kinetic energy to the fluid by means of the axial flow vanes, and the kinetic energy is not converted into static pressure energy, but friction is generated at the inner wall or drain. Because it is sent after being lost as eddy loss due to loss and turbulence,
One aspect is that the efficiency as an electric pump is poor. In this regard, the invention according to claim 18 is the swimming assist device according to claim 17, wherein the in-line electric pump rotates the fluid sent toward the drain port by the axial flow blade of the rotor. A first pressure chamber that converts kinetic energy into static pressure energy, and a second pressure that is disposed between the first pressure chamber and the drain port and is separated from the first pressure chamber by a partition wall. And a guide hole arranged on the outer peripheral portion of the partition wall and connecting between the first pressure chamber and the second pressure chamber. By converting the rotational kinetic energy of the fluid to be converted into static pressure energy by the first pressure chamber, the fluid can be sent efficiently, thereby improving the energy efficiency. Therefore, large energy can be generated by the small and light electric pump, and when the swimming assist device is mounted on the human body, the propulsion force can be generated without hindering the swimming / swimming operation.

A nineteenth aspect of the present invention is the swimming assist device according to the eighteenth aspect, wherein in the in-line electric pump, the rotation axis of the rotor is rotatable at a center of the partition wall with a predetermined clearance. A sliding bearing is provided for supporting the bearing, and a leakage flow path communicating the second pressure chamber and the inner peripheral surface of the sliding bearing is formed in the partition wall. The fluid in the second pressure chamber can be interposed with a uniform pressure distribution therebetween, so that the lubrication of the rotating shaft can be favorably maintained for a long time.

[0177] The invention according to claim 20 is the swimming assist device according to claim 18 or 19, wherein in the in-line type electric pump, the second pressure chamber is provided with a second rotating member integrally rotating with the rotor. Since axial flow blades are provided,
Fluid can be sent by dispersing the pressure by the axial flow blade provided inside the stator and the second axial flow blade provided in the second pressure chamber. Therefore, when the rotor is downsized, the decrease in the fluid feeding performance of the axial flow blade can be compensated for by the second axial flow blade. Thus, the fluid can be efficiently sent while satisfying further miniaturization.

The invention according to claim 21 is the swimming assist device according to any one of claims 18 to 20, wherein in the in-line type electric pump, a radius centered on an axis of the rotor is minimized. Since the diameter of the concave portion of the axial flow blade is determined to be larger than the diameter of the support portion formed on the partition wall for supporting the slide bearing, the fluid sent by the axial flow blade and the slide bearing are supported. Loss due to collision with the supporting portion can be reduced.

The invention according to claim 22 is the swimming assist device according to any one of claims 18 to 21, wherein in the in-line type electric pump, the axial flow blade has a spiral shape around a cylindrical or cylindrical outer periphery. The spiral groove has a shape in which a groove is formed, and the width and the depth of the spiral groove are set to substantially equal values. Therefore, it is possible to reduce the flow path resistance and suppress the generation of a vortex.
Thereby, the fluid can be sent more efficiently.

According to a twenty-third aspect of the present invention, there is provided the swimming assist device according to the seventeenth aspect, wherein the in-line electric pump rotates the fluid sent toward the drainage port by the axial flow blade of the rotor. A pressure chamber for converting kinetic energy to static pressure energy, a centrifugal blade arranged in the pressure chamber and rotating integrally with the rotor, and the fluid sucked from the water inlet through an outer peripheral portion of the stator. A suction flow path that is guided so as to be guided to a pressure chamber and fed toward a surface of the centrifugal blade opposite to the axial flow blade, and a rotation of the centrifugal blade causes fluid in the pressure chamber to flow through the pressure chamber. A guide passage leading from the outer peripheral portion to the drainage port, so that the rotational kinetic energy of the fluid sucked from the water intake port and sent toward the drainage port by the axial flow blade is guided to the pressure chamber to generate static pressure energy. Fluid can be sent efficiently by converting. In addition, since the pressure acting on the centrifugal vanes from the fluid sent by the axial flow vanes and the pressure acting on the centrifugal vanes from the fluid passing through the suction flow path are offset, the thrust load given to the rotor by the fluid is reduced. Can be reduced. Therefore, large energy can be generated by the small and light electric pump, and when the swimming assist device is mounted on the human body, the propulsion force can be generated without hindering the swimming / swimming operation.

According to a twenty-fourth aspect of the present invention, in the swimming assist device according to the twenty-third aspect, in the in-line type electric pump, a connection portion between the guide passage and the pressure chamber has an energy of a flowing fluid of the rotor. Since they are determined to be substantially equal at symmetrical positions about the axis, the load on the rotor in the radial direction can be reduced.

According to a twenty-fifth aspect of the present invention, there is provided the swimming assist device according to any one of the sixteenth to twenty-fourth aspects, wherein the band portion includes a band-shaped abdomen band attached to a human abdomen,
Since it has a hook portion provided at one end of the abdominal band band and a fixing portion provided at the other end of the abdominal band band and having a catcher for detachably locking the hook portion,
By controlling the drive of the electric pump by the drive control circuit while the band is attached to the torso of the person, the propulsion force of the electric pump is obtained without hindering the swimming / swimming operation and on both the water surface and the water. Therefore, it is possible to cope with almighty for various uses.

The invention according to claim 26 is the swimming assist device according to any one of claims 16 to 25, wherein the electric pump, the drive control circuit, and the power storage unit are housed in a single casing. Since they are provided integrally, the swimming assist device can be assembled simply by providing a single casing on the band portion, and therefore, the efficiency of manufacturing and assembling work can be improved.

According to a twenty-seventh aspect of the present invention, there is provided the swimming assist device according to any one of the sixteenth to twenty-sixth aspects, wherein the electric pump is provided on the abdomen side of a human body in a state where the band portion is mounted on a human. Since it is provided in the band portion so as to be positioned, the electric pump is reliably positioned below the water surface,
Propulsion can be generated.

[0185] The invention according to claim 28 is the swimming assist device according to any one of claims 16 to 27, further comprising an additional function unit provided in the band unit, wherein the additional function unit is installed. A fluid storage chamber for storing and holding the fluid,
A supply / discharge port for communicating the fluid storage chamber with the outside, and an opening / closing valve for closing the fluid storage chamber by opening and closing the supply / discharge port are provided. Air or liquid from the outlet to the fluid storage chamber
Powder and the like can be supplied and discharged.For example, if air is stored in a fluid storage chamber in a sealed manner, buoyancy against water is generated, and a person wearing a swimming aid can float on the water surface, If liquids, powders, and the like are hermetically stored in the fluid storage chamber, it can be easily submerged in water, and a person wearing the swimming aid can assist in swimming in water.

According to a twenty-ninth aspect of the present invention, in the swimming assist device according to the twenty-eighth aspect, the additional function portion is detachably provided on the band portion, so that the additional function portion is attached to and detached from the band portion. By freely attaching, various functions can be easily and quickly added to the swimming assist device.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a perspective view illustrating an appearance of an entire swimming assist device.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partially cutaway view showing an arrangement state of a water flow propulsion type electric pump in the embodiment.

FIG. 4 is a partially enlarged view of a cutout portion in FIG. 3;

FIG. 5 is a perspective view when the embodiment is viewed from below.

FIG. 6 is a sectional view taken along the line BB of FIG. 1;

FIG. 7 is a sectional view showing a configuration of the electric pump according to the embodiment.

FIG. 8 is a circuit configuration diagram showing a configuration of a control unit of the electric pump in the embodiment.

FIG. 9 is an output waveform diagram of each part for explaining the speed control of the electric pump by the control means of FIG. 8;

FIG. 10 is a perspective view showing a second embodiment of the present invention.

FIG. 11 is a front perspective view showing a third embodiment of the present invention.

FIG. 12 is a perspective view of a main body viewed from the rear.

FIG. 13 is a vertical sectional side view of a main body.

FIG. 14 is a sectional view taken along line AA in FIG.

FIG. 15 is a vertical sectional front view of a handle mounting portion.

FIG. 16 is a horizontal sectional plan view of the main body.

FIG. 17 is a circuit diagram of a rotation control unit.

FIG. 18 is a vertical sectional side view showing a fourth embodiment of the present invention.

FIG. 19 is a vertical sectional side view showing a fifth embodiment of the present invention.

FIG. 20 is an overall perspective view showing a sixth embodiment of the present invention.

FIG. 21 is a vertical sectional side view showing an in-line electric pump used in the swimming assist device of the present invention.

22 is a sectional view taken along the line AA in FIG. 21.

FIG. 23 is a longitudinal sectional side view showing a part of a rotor.

FIG. 24 is a vertical sectional side view showing another in-line electric pump used in the swimming assist device of the present invention.

FIG. 25 is a longitudinal sectional side view of another in-line electric pump used in the swimming assist device of the present invention.

FIG. 26 shows the in-line electric pump shown in FIG.
It is the longitudinal side view seen from the direction different in degree.

FIG. 27 is a bottom view of the in-line electric pump as viewed in the direction of arrow B in FIG. 25.

FIG. 28 is a vertical sectional side view showing a preferred embodiment of an in-line electric pump used for the swimming assist device of the present invention.

FIG. 29 shows the in-line electric pump shown in FIG.
It is the longitudinal side view seen from the direction different in degree.

FIG. 30 is a view taken along line CC in FIG. 28.

FIG. 31 is a side view showing an example of actual use on the water surface.

FIG. 32 is a side view showing an example of actual use in water.

[Explanation of symbols]

111 Hull 102 Battery 106a, 106b Grip section 107a, 107b Operation section (push-type operation button) 109a, 109b Drain port 110 Electric pump 111a, 111b Water intake port 201 Main body section 202 Handle 203 Water intake port 204 Supply / exhaust port 205 Drain port 209 Battery 210 Motor 212 Electric Pump 214 Flow Path 218 Buoyancy Control Room 230 Rotation Control Means 243 Motor 302 Stator 303 Axial Blade 310 Cylindrical Body 311 Spiral Groove 317 Water Inlet 319 Drain 321 Partition Wall 322 First Pressure Chamber 323 Second Pressure Chamber 324 Guide hole 326 Sliding bearing 327 Supporting part 328 Leak flow path 329 Second axial flow blade 332 Pressure chamber 333 Guide flow path 335 Centrifugal blade 341 Suction flow path 1102 Band section 1103 Power supply storage section 1 04 additional function unit 1105 bellyband band 1106 hook 1107 catcher 1109 casing 1114 fluid storing chamber 1115 supply outlet 1116 closing valve P, P1, P2, P3, P4 electric pump

Claims (29)

[Claims] 1. A swim assist comprising: a base unit integrated with a human body; and a water flow propulsion type electric pump attached to the base unit and having a water inlet and a drain and driven by a battery to operate. apparatus. 2. A hull floating on the water, provided with grip portions on both front sides and an operation portion near at least one grip portion, and provided integrally with the hull and supplied with electric power by a battery. A swimming assist device comprising: a water flow propulsion type electric pump; and control means for controlling the power of the electric pump in response to an operation of the operation unit. 3. The swimming assist device according to claim 2, wherein electric pumps are provided on the right and left rear of the hull, respectively. 4. The swimming assist device according to claim 2, wherein one electric pump is provided on a center line behind the hull. 5. The swimming assist device according to claim 3, wherein the water suction port of the electric pump is disposed on the bottom surface near the left and right positions of the center of gravity of the boat. 6. The swimming assist device according to claim 2, wherein the storage position of the battery is arranged near the center of gravity of the boat. 7. The swimming assist device according to claim 2, wherein a display device for displaying at least the remaining battery capacity is arranged at a front portion of the upper surface of the hull. 8. A body having a built-in battery and an electric pump operated by the body, the buoyancy is set slightly larger than zero, and a handle is provided on an outer surface of the body. The electric pump is disposed in a flow path that connects a water inlet formed at a lower part or a bottom part of a front waterline and a drainage part formed at a lower part of the waterline behind the main body, and a reaction of a water flow by the electric pump is provided. A swimming assist device characterized in that a propulsive force is generated by force. 9. The swimming assist device according to claim 8, wherein an electric pump that can switch between a water suction side and a drainage side is provided. 10. The swimming assist device according to claim 8, wherein the electric pump is a submersible electric pump capable of absorbing and draining water, which has a main passage in a motor. 11. The swimming assist device according to claim 8, wherein a buoyancy control chamber is provided in the main body so as to adjust a loading amount of water. 12. The swimming assist device according to claim 11, wherein the buoyancy control chamber is formed with a water supply / drain port communicating with a flow path provided with the electric pump and a supply / exhaust port communicating with outside air. 13. The swimming assist device according to claim 11, wherein a buoyancy control chamber is formed above the battery. 14. The swimming assist device according to claim 8, wherein rotation control means for controlling increase / decrease of the number of rotations and switching of the rotation direction is connected to a motor of the electric pump. 15. A motor control method comprising: moving a handle of a main body part in a left-right direction; using the moving direction and the moving amount as inputs to a rotation control means to control increase / decrease of a rotation speed of a motor of an electric pump and switching of a rotation direction; The swimming assist device according to claim 14, wherein 16. A band which is detachably attached to a human torso, and has a water inlet and a drain at both ends, and wherein the water inlet is a head when the band is attached to the human torso. And an electric pump provided on the band portion so that the drain port is located on the leg side, and a drive that is provided in the band portion in an airtight state and controls the electric pump by power supply from a power supply. A swimming assist device comprising: a control circuit; and a power storage unit provided in the band unit and storing the power supply for the drive circuit in an airtight state. 17. The in-line electric pump in which a rotor having an axial flow vane for axially sending fluid sucked from the water intake port toward the drain port is provided inside a cylindrical stator. Claim 1 which is a type electric pump.
The swim assist device according to 2, 8 or 16. 18. The first in-line type electric pump, comprising: a first pressure chamber for converting rotational kinetic energy of the fluid sent toward the drainage port by the axial flow blade of the rotor into static pressure energy; A first pressure chamber disposed between one pressure chamber and the drain port, a second pressure chamber partitioned by a partition wall, and a first pressure chamber disposed on an outer peripheral portion of the partition wall. The swimming assist device according to claim 17, further comprising: a guide hole connecting between the chamber and the second pressure chamber. 19. The in-line type electric pump, wherein a sliding bearing is provided at a center of the partition wall to rotatably support a rotating shaft of the rotor with a predetermined clearance, and the partition wall has the second pressure. 19. The swimming assist device according to claim 18, wherein a leak passage communicating between the chamber and the inner peripheral surface of the slide bearing is formed. 20. The swimming assist device according to claim 18, wherein in the in-line electric pump, the second pressure chamber is provided with a second axial blade that rotates integrally with the rotor. 21. In the in-line type electric pump, a diameter of a concave portion of the axial flow vane having a minimum radius around an axis of the rotor is a support formed on the partition wall for supporting the sliding bearing. The swimming assist device according to any one of claims 18 to 20, wherein the diameter is set to be larger than the diameter of the part. 22. In the in-line type electric pump, the axial flow blade has a shape in which a spiral groove is formed in a cylindrical or cylindrical outer periphery, and a width and a depth of the spiral groove are substantially equal to each other. The swimming assist device according to any one of claims 18 to 21, which is determined. 23. A pressure chamber for converting rotational kinetic energy of the fluid sent to the drainage port by the axial flow vanes of the rotor into static pressure energy, wherein the in-line electric pump is disposed in the pressure chamber. A centrifugal blade that rotates integrally with the rotor, and guides the fluid sucked from the water suction port to the pressure chamber via an outer peripheral portion of the stator, and a surface of the centrifugal blade opposite to the axial flow blade. 18. A suction flow path having a path defined so as to be fed toward the pressure chamber, and a guide flow path for guiding a fluid in the pressure chamber from a peripheral portion of the pressure chamber to a drain port by rotation of the centrifugal blade. Swim assist device. 24. In the in-line type electric pump, a connection portion of the guide passage with the pressure chamber is defined such that energy of a flowing fluid is substantially equal at a symmetric position about the axis of the rotor. Claim 23
The swim assist device according to the above. 25. A band-shaped abdominal band attached to a human abdomen, a hook provided at one end of the abdominal band, and a hook provided at the other end of the abdominal band to attach and detach the hook. The swimming assist device according to any one of claims 16 to 24, further comprising: a fixing portion having a catcher that freely locks. 26. The swimming assist device according to claim 16, wherein the electric pump, the drive control circuit, and the power storage unit are integrally provided in a single casing. 27. The electric pump according to claim 16, wherein the electric pump is provided on the band so that the band is positioned on the abdominal side of a human body when the band is worn on a person.
The swim assist device according to any one of the above. 28. An apparatus according to claim 28, further comprising an additional function portion provided on said band portion, said additional function portion comprising: a fluid storage chamber for storing and holding the introduced fluid; and a supply / discharge port for connecting said fluid storage chamber to the outside. And an opening / closing valve that seals the fluid storage chamber by opening and closing the supply / discharge port.
The swim assist device according to any one of claims 7 to 10. 29. The swimming assist device according to claim 28, wherein the additional function unit is detachably provided on the band unit.