JPH0578349B2 - - Google Patents

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a blood circulation promoting device.

[Background technology]

To recover from stiff shoulders and muscle pain, it is effective to apply electromagnetic fields to specific parts of the body to promote blood circulation.

To this end, it is simple and effective to attach the blood circulation promoting device directly to the skin where stiff shoulders are occurring or to wear it on the person's body. Recently, as a device for pasting in this way, a unit is constructed by incorporating an electromagnetic field generating circuit, a battery to drive the circuit, and an antenna for forming the electromagnetic field into a case that is attached to the affected area. There is.
Since this device is unitized, it is very convenient to handle.

An example is shown in FIGS. 7a and 7b. As shown in these figures, the circuit board 40 incorporated into the case is formed in an annular shape.
As shown in FIG.
are arranged in a loop. circuit board 4
As shown in FIG. 7b, a plurality of elements 42 are disposed on the opposite surface of 0, and these elements 42 are connected by wires 43. There is a ground pattern on the inner peripheral edge of the circuit board 40.
A GND pattern 44 is arranged in a loop shape, and a VDD pattern 45 is also arranged in a loop shape on the outer periphery of the circuit board 40. GND pattern 4
4, a first circuit terminal 47 is connected to the negative side of the battery 46.
The VDD pattern 45 is connected to the positive side of the battery 46 via the second circuit terminal 48, and thus the electromagnetic field generating circuit 4
9 are configured. Transistor in oscillator circuit
Q ₁ is connected to the first antenna terminal 50 of the antenna 41,
The second circuit terminals 48 are connected to the second antenna terminals 52 through the circuit board 40, respectively.

As shown in FIG. 8, the antenna 41 includes:
When an alternating current flows, an alternating magnetic field is generated in which the direction of the magnetic field alternates as shown by arrow A. Since this type of device is required to be as compact as possible, the electromagnetic field generating circuit 49 is connected to the antenna 41.
They are parallel to each other and placed very close to each other. Therefore, the alternating magnetic field A generated by the antenna 41 acts even on the patterns 44 and 45 of the electromagnetic field generating circuit 49.

However, in the conventional electromagnetic field generation circuit 49, as shown in FIG.
formed a closed loop, the alternating magnetic field A
An induced current is generated, and a magnetic field as indicated by the broken line arrow B is generated in the electromagnetic field generation circuit 49 due to the induced current. As shown in FIG. 9, the direction in which this magnetic field B is generated acts in the opposite direction to the alternating magnetic field A generated by the antenna 41, so that the force of the alternating magnetic field A is weakened. In addition, the conventional electromagnetic field generation circuit 49 includes a seventh
As shown in FIG. 10, a planar conductor portion 45a is provided in a part of the VDD pattern 45 with a slightly wide area, so when the alternating magnetic field A acts on this planar conductor portion 45a, as shown in FIG. In some cases, an eddy current D is generated, and this eddy current D generates a magnetic field E in the opposite direction to the alternating magnetic field A, thereby weakening the alternating magnetic field A.

[Purpose of the invention]

In view of the above circumstances, the present invention aims to make the antenna and electromagnetic field generation circuit close to each other to make it thin and compact so that it can be easily used anywhere. It is an object of the present invention to provide a blood circulation promoting device that acts on the blood circulation.

[Disclosure of the invention]

In order to achieve the above object, the present invention includes an antenna that radiates an electromagnetic field by supplying alternating current, and an electromagnetic field generating circuit that supplies alternating current to this antenna, wherein the antenna and the electromagnetic field generating circuit are parallel to each other. The gist of the present invention is a blood circulation promoting device arranged in a blood circulation promoting device, characterized in that a plurality of circuit elements of the electromagnetic field generating circuit are connected by a connection with both ends open.

Hereinafter, the present invention will be explained in detail with reference to the drawings showing embodiments thereof.

FIG. 1 shows an example of the blood circulation promoting device according to the present invention, in which FIG. 1a shows the circuit board 20 seen from the side worn on the body, and FIG. 1b shows the circuit board 20 seen from the other side. This blood circulation promoting device is shown in an exploded view from above in FIG. 2, and in an assembled state in FIGS. 3 and 4. As seen in these figures, this blood circulation promoting device is equipped with a case C made of plastic material. Case C consists of a case body 1 and a case cover (battery cover) 2. The case body 1 is formed by stacking a lower case 3 and an upper case 4 one above the other and sealingly joining them together using an ultrasonic welder. This is to improve waterproofness. The lower case 3 is shaped like a flat disk and has a number of ventilation grooves 5 on its bottom surface. This device case C is adapted to be attached to the affected area via a breathable cushion sheet 6 having adhesive sheets 7 and 8 laminated on both sides. That is, one adhesive sheet 7 is attached to the bottom surface of the lower case 3, and the other adhesive sheet 8 is attached to the affected area. The adhesive sheets 7 and 8 are provided with a large number of ventilation holes 9. The cushion sheet 6 is made of a soft elastic material.

The upper case 4 has a spherical upper surface 10 that is high at the center and low at the outer periphery. A circular battery mounting opening 12 is formed in the center of the upper case 4. A cylindrical partition wall 11 is formed from the periphery of the mounting opening 12 toward the inside.
The case cover 2 is fitted into the mounting opening 12 from above. case cover 2
The upper surface thereof is spherical like the upper case 4, and the peripheral edge 2a thereof extends in the axial direction to form a cylindrical shape. An O-ring 13 is attached to the outer peripheral surface of this peripheral edge portion 2a. A cover-side hook 14 is formed at the edge of the peripheral edge portion 2a. This cover-side hook 14 is adapted to detachably engage with a case-side engagement protrusion 15 provided protrudingly on the inner circumferential surface of the partition wall 11 of the upper case 4 . This engagement and disengagement is accomplished by inserting a coin into a coin groove 16 formed in the center of the upper part of the case cover 2 and rotating the case cover 2 in either direction. Partition wall 11
A battery accommodating portion 17 is formed on the inner circumferential side, and an accommodating space 18 for circuit components and antennas is formed on the outer circumferential side. A button type battery 19 is fitted in the battery housing portion 17 . on the other hand,
In the circuit component/antenna housing space 18, a circuit element 21 for an electromagnetic field generating circuit is installed via a circuit board 20.
A loop-shaped antenna 22 is provided. The circuit board 20 is formed of a circular annular plate, and a first battery connection fitting 23 protruding from one location on the bottom surface connects to one pole of the battery 19, and a second battery connection fitting 23 protrudes from another location on the bottom surface. Connection fitting 24 is battery 1
They are connected to the other poles located at the center bottom of 9.

By the way, a loop-shaped antenna 22 as shown in FIG. 1A is provided on the side of the circuit board 20 that is worn on the body, that is, on the bottom surface as seen in the figure. On the other hand, on the side opposite to the mounting surface of the printed circuit board 20, that is, on the upper surface as seen in the figure, a plurality of circuit elements 21 as shown in FIG. 1B are arranged. Each of the circuit elements 21 is connected by a wire connection 31, which is a wire connection on the inner peripheral edge of the circuit board 20.
The GND pattern 32 and the VDD pattern 33 that connects the outer peripheral edge of the circuit board 20 each form an open loop with both ends open. In other words, GND
One end of the pattern 32 is connected to the first circuit terminal 34 connected to the negative side of the battery 19, and the other end is connected to the circuit element 2.
Connected to 1. Also, VDD pattern 33
One end is connected to a second circuit terminal 35 connected to the positive side of the battery 19, and the other end is connected to the circuit element 21. The GND current flows in the X direction, the VDD current also flows in the same X direction, and the antenna current also flows in the same direction as the X direction. Note that the first antenna terminal 36 is a transistor in the oscillation circuit 27 indicated by a broken line in FIG. 1b.
In Q ₁ , the second antenna terminal 37 is connected to the second circuit terminal 35 .

The circuit element 21 is mainly a component for an electromagnetic field generating circuit, and its detailed circuit configuration is as follows. In other words, as shown in Figure 5, the oscillation circuit consists of resistors R ₁ and R ₂ , capacitors C ₁ and C ₂ , transistor Q ₁ , and inductance.
A Colpitts-type LC oscillation circuit 27 consisting of _L1 ,
Resistor R ₃ ~ _{R 6} , capacitor C ₃ , C ₄ , transistor
It consists of a multivibrator 28 consisting of Q ₂ and Q ₃ and a display circuit 29 consisting of a resistor R ₇ , a transistor Q ₄ and a light emitting diode LED. When the battery power switch SW is turned on, the multivibrator 28 oscillates. The oscillation output supplies the base current of the transistor Q ₁ of the oscillation circuit 27, causing the oscillation circuit 27 to operate in oscillation and generate an electromagnetic field modulated by the output of the multivibrator 28. This electromagnetic field is radiated via antenna 22 coupled to inductance L ₁ . Here, the modulation by the multivibrator 28 is intended to maintain the blood circulation promotion device to the living body and to save power. The output of the multivibrator 28 is applied to the base of the transistor Q ₄ of the display circuit 29 to intermittently switch the transistor Q ₄ , and the transistor Q ₄ is connected to a light emitting diode connected in series.
Display the usage status by blinking the LED.

As mentioned above, the blood circulation promoting device of this invention has the following features:
Since both the GND pattern 32 and the VDD pattern 33 are connected with both ends open, even if the electromagnetic field (alternating magnetic field) A generated by the antenna 22 acts on each pattern 32, 33, as shown in FIG. No induced current is generated, so that the electromagnetic field caused by the induced current does not act in the opposite direction on the electromagnetic field A caused by the antenna 22 and weaken the electromagnetic field A. Moreover, GND current and VDD
The electromagnetic field B generated by the current is shown by the dotted arrow in FIG. , will act synergistically on the electromagnetic field A. This results in
The electromagnetic field A generated by the antenna 22 is slightly strengthened, and the current is effectively used for generating the electromagnetic field without loss. Furthermore, in the conventional VDD pattern 33, the presence of the planar conductor portion 45a generates eddy current, which acts to weaken the electromagnetic field A generated from the antenna 22, but in the blood circulation promoting device described above, teeth,
Since such a planar conductor part does not exist, the electromagnetic field is no longer weakened. If the circuit element 21 and the antenna 22 are arranged so as to surround the battery 19 as in the above embodiment, the space around the battery 19 can be effectively utilized, and the entire device can be made very thin and compact. Ru.
It is preferable that the antenna 22 be placed as far outside as possible. This is because by doing so, the radiation area of the electromagnetic field can be maximized.

〔Effect of the invention〕

As seen above, the blood circulation promoting device according to the present invention includes an antenna that radiates an electromagnetic field by supplying an alternating current, and an electromagnetic field generating circuit that supplies the alternating current to the antenna. The blood circulation promoting device in which the circuits are arranged in parallel is characterized in that the plurality of circuit elements of the electromagnetic field generating circuit are connected by a connection with both ends open, so that the device can be easily installed anywhere. In order to make the antenna and the electromagnetic field generation circuit close to each other to make it thinner and more compact, the electromagnetic field generated by the antenna can effectively act on the body without being weakened.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the blood circulation promoting device according to the present invention, in which FIG. 2 is an exploded perspective view of this blood circulation promoting device, FIG. 3 is a perspective view showing the state of this blood circulation promoting device after assembly, FIG. 4 is its overall sectional view, and FIG. 5 is an exploded perspective view of this blood circulation promoting device. The circuit configuration diagram, FIG. 6, is an explanatory diagram showing the state of generation of an electromagnetic field, and FIG. 7 shows a conventional example. Figure b is another side view of the circuit board seen from the side opposite to the mounting surface, Figure 8 is a perspective view showing the state of the alternating magnetic field acting on the circuit pattern from the antenna in the conventional example, and Figure 9
The figure is an explanatory diagram showing the relationship between the electromagnetic field generated in the circuit pattern by electromagnetic induction and the electromagnetic field generated by the antenna. Figure 10 is a perspective explanatory diagram showing the state of eddy currents generated in the planar conductor part. It is. 22... Antenna, 21... Electromagnetic field generating circuit element, 32, 33... Connection.

Claims (1)

[Claims] 1. An antenna that radiates an electromagnetic field by supplying an alternating current, and an electromagnetic field generating circuit that supplies the alternating current to the antenna, the antenna and the electromagnetic field generating circuit being arranged in parallel. A blood circulation promoting device characterized in that a plurality of circuit elements of the electromagnetic field generating circuit are connected by a connection with both ends open. 2 Claim 1 in which the direction of current flowing through the electromagnetic field generating circuit and the antenna is the same direction
Blood circulation promoting device as described in . 3. The antenna pattern is arranged on one side of an annular circuit board with a cavity in the center for arranging the battery, and the elements of the electromagnetic field generating circuit are arranged on the other side of the circuit board. The blood circulation promoting device according to claim 1 or 2, wherein each element is connected by a wire connection that is arranged along the periphery of the circuit board and is open at both ends.