JP2999811B2 - Low frequency treatment device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low frequency therapy device for home use, and more particularly to a device for generating a high voltage by using a chopper type booster.

[Related Art] In recent years, various types of low frequency treatment devices for home use have been proposed which can provide not only simple repetitive stimulation but also stimulation that simulates acupressure such as "momming" and "slapping".

[Problems to be Solved by the Invention] However, in the conventional low-frequency therapeutic device, the configuration becomes extremely complicated and large as the number of operation modes increases, and the battery is greatly consumed. Is growing.

The present invention has been made in view of such a problem,
It is an object of the present invention to provide a low-frequency treatment device capable of obtaining a variety of treatment modes while maintaining a relatively simple configuration and further reducing battery consumption as much as possible.

[Means for Solving the Problems] As shown in a schematic configuration in FIG. 1, a low-frequency therapeutic device according to the present invention includes a booster circuit 40 for converting a terminal voltage of a battery 45 to a high voltage, the high voltage formed by the circuit 40, in conjunction with input of the driving signal S ₃ output from the driving signal generating means, a high-voltage pulse generating circuit 41 for outputting an amount of time corresponding to the pulse width of the drive signal S ₃ It has.

The step-up circuit 40 described above, the on-off timing is controlled by the boost signal S ₂ sent from the step-up signal generating means, the battery 45
A switching means for intermittently the current flowing through the coil 44 from the capacitor 48 for sequentially integrating the high-voltage pulse signal S ₁₄ which is formed intermittently at by said switching means, connected in parallel with the capacitor 48, which is integrated in the capacitor 48 Constant voltage means for regulating the voltage value to a predetermined constant voltage or less.

Also constituting a pulse train the boost signal S ₂ as described above, changes to A · B of such high and low two stages at least, for example, 16kHz and 2kHz frequency. On the other hand, the driving signal S ₃ is also in the manner switched alternatively to the frequency a · b of such high and low two stages by the switching means such as 64Hz and 4 Hz. Furthermore, the drive signal
When selecting the higher frequency a as S _3, the boosting signal S ₂ having the lower frequency B, it alone is set so as to become a value Shitamawaru the regulation value due to the constant voltage means further predetermined time interval in the frequency of the boost signal S ₂ is constituted as periodically switched between a and B.

Note frequency of the boost signal S ₂ described above, the time signal S ₇ output from the frequency dividing means for converting a signal outputted from the reference signal generating means divide to lower frequency selected by the switching means, the drive signal or cyclically changed in sufficiently long for example 2 seconds than the period of the S _3, is changed in synchronization with the driving signal S ₃ described above, at least a predetermined time during one cycle of the driving signal S _3, lower frequency A pulse train of B can be output.

Also the boost signal S ₂ described above, it is preferable to construct so as to regulate the energization timing to the display device 17.

[The effect "described above arrangement, when the switching means by the input of the boost signal S ₂ is turned on, a current flows from the battery 45 to the coil 44. When such current is turned off by the switching means, the pulse shape of the counter electromotive force is generated in the coil 44, the voltage S ₁₄ is integrated by the capacitor 48, the capacitor 48
Although the terminal voltage gradually rises, a constant voltage means such as a Zener diode is provided at both ends of the capacitor 48, and when the voltage reaches the regulation value by the constant voltage means, the value is maintained.

On the other hand, the driving signal S ₃ is high-voltage pulse generating circuit of the pulse interval and the pulse width corresponding to the therapeutic pulse signal to be output
It is input to 41, emitting production circuit 41 releases the charge stored in the capacitor 48, and can supply predetermined electrical stimulation S _13.

Here, the boost signal S ₂ is thereby composed of at least two kinds of pulse trains A · B different frequencies, at least the higher frequency a one frequency B, as a drive signal S ₃
When you select, together with the alone is set to such a value drive signal S ₃ to the high-voltage pulse generating circuit 41 is input before reaching the regulation value due to the constant voltage means, it is by at least a predetermined time under this The frequency B on the side is set to be sent to the booster circuit 40. Thus, the setting time described above, by setting sufficiently larger than the time interval between pulses of the driving signal S _3, the amplitude of the high-voltage pulse signal S ₁₃ output from the high-voltage pulse signal generating circuit 41, for example, Fig. 6 It changes periodically as shown in (b). Is set smaller than the time interval between opposite to the driving signal S ₃ pulse, the capacitor 48 is always charged to the regulation value or a value close to the voltage regulating means, period Working voltage regulating means is reduced as much as possible Thus, waste of the battery 45 is prevented.

Incidentally, using the boost signal S ₂ as described above, by energizing the display element 17 such as a LED in response to changes in the pulse rate of the signal S _2, if as perform display due to a difference in the substantial conduction time In addition, the energization time for the display element 17 per unit time indicates a change in a plurality of stages, and a display with different brightness is performed according to the operation mode.

EXAMPLES low-frequency electric therapy apparatus 1 according to the present invention, as shown in FIG. 2, the treatment device body 2 for generating a therapeutic pulse signal S _1, detachably via the plug 3 to the treatment device body 2 And a conductor 4 which is connected to

Two conductors 4 having the same configuration are used as one set, and each of the conductors 4 includes a plate-shaped electrode 6 on a rectangular plate-shaped insulating base material 5. , And further covered with a conductive adhesive pad 7. With this configuration, the application of a therapeutic pulse signals S ₁ between the electrodes 6, 6 in a state in which the adhesive pad 7 side of Kakushirubeko 4.4 was stuck spaced treatment affected area, while Ryoshirubeko 4.4 A predetermined current flows on the skin surface of the skin to give electrical stimulation.

The treatment device main body 2 includes a jack 12 into which the plug 3 of the lead 4 is removably fitted on the upper surface 11 side of the flat main body case 10, and a polarity switching and use mode at the center on the front surface 13 side. Three changeover switches 14, 15, and 16 for switching and for switching the use time are arranged in the vertical direction, and a display element 17 indicating an operation state is provided at an upper position. In addition, a variable resistor for output adjustment with a power switch 19 on the side 18 side
By providing 20, the changeover switches 14, 15,.
In combination with 16, various kinds of manual switching operations of the electronic circuit 21 housed in the main body case 10 can be performed.

The electronic circuit 21 housed in the main body case 10 includes a control signal generation unit 22 and a control signal generation unit 22, as shown in a general block diagram in FIG.
A therapeutic voltage generator 23 capable of generating a predetermined high-voltage low-frequency pulse signal based on a plurality of types of control signals output from the generator 22 and a control state of the therapeutic voltage generator 23 are displayed. And a display unit 24.

The control signal generator 22 is constituted by a CMOS gate array formed as an LSI, and is shown in FIGS. 5 (b) and 5 (d).
The pulse width is as narrow as tens of microseconds as in 16kHz and 2kHz
The boost signal S ₂ to pulse signal A · B is a pulse train following the alternate frequency, FIG. 5 (a) pulse width as the (c) is about 120μ sec boost signal S ₂稍広rather than, the frequency 4,
The drive signal S ₃ , which is selected from three types of pulse signals of 8, 64 Hz, can be individually output as a control signal, and the pulse interval of the boost signal S ₂ is changed to about 60 μsec or 500 μsec. while capable of changing a peak value of the therapeutic voltage S ₁ by, 250 meters sec pulse interval of the drive signal S _3, 12
By alternatively be chosen from among 5m sec or 16m seconds, and the like can be changed pulse interval of a therapeutic pulse signals S ₁ in three stages.

Here at the same time turning on the power switch 19 is sent to the timer circuit 26 of the control signal generating unit 22 subsequently reset signal S ₄ and a start signal S ₅ from the reset unit 25, the control signal generating unit 22 to start. A reset signal generation circuit 27 and a start signal generation circuit constituting the reset unit 25
28 together, as a specific configuration in FIG. 4, a integrating circuit using a CR, by driving the start signal generation circuit 28 by a signal S ₄ that is output from the reset signal generating circuit 27, and the reset signal S ₄ and the start signal S ₅ with a predetermined time difference is in the manner are sequentially input to the timer circuit 26.

The timer circuit 26 has been made to generate a predetermined signal corresponding to count a predetermined time, in the present embodiment starts generation immediately after the start signal S ₅ is input, used the signal S ₆ to stop with 7.5 or 15 minutes which is selected has elapsed by the time the changeover switch 16, to regulate the longest operating time that allows the electrical therapy. The aforementioned signal S ₆
Is applied to the reference oscillation circuit 30 to start the oscillation circuit 30.

Reference oscillation circuit 30, there is a pulse width of several tens of μ seconds or even frequency below generates a reference pulse signal S ₈ to about 65 kHz, half the frequency of such reference pulse signal S ₈ in divider circuit 31 In addition, the frequency is repeatedly reduced to half, and frequency-divided signals S ₇ , S ₉ , and S ₁₅ of various frequencies are formed. Approximately 32kHz and 16kHz signals among the formed divided signals
Send S ₉ to the step-up signal generating circuit 33, the use mode switch 15, the time signal S ₇ and 4Hz of 0.25 Hz, and sends a signal S ₁₅ consisting 8Hz and 64 Hz.

Then, "hitting slow" is selected by the mode changeover switch 15 to the "fast hit" or "massaging" the three modes of use feeling, 4 Hz, first from within signal S ₁₅ of 8Hz and 64Hz for 1 circuit 3 contacts by sending one signal S ₁₀ to alternatively drive signal generating circuit 34 by the first switch contact 15a, in the drive signal generating circuit 34, the pulse width of the frequency at approximately 120μ sec 4,8 or 64Hz driving signal S ₃ can be selectively generated. First switch contact 15 described above
via a second switch contact 15b which moves in conjunction with a, 4 and 8Hz whereas during selection sends a signal S ₁₁ in synchronization with the signal sent to the drive signal generating circuit 34 side, at the time of selecting the 64 Hz, frequency divider described above inverted at 2 second intervals output from 31, the frequency is sent to each boost control circuit 35 time signal S ₇ of 0.25 Hz.

The boost signal generating circuit 33 directs a continuous pulse train to the therapeutic voltage generating section 23 while switching between the 16 kHz and 2 kHz pulse signals A and B in response to the signal S ₁₂ input from the boost control circuit 35 side. be one that outputs, when the user selects the 4 or 8Hz use mode changeover switch 15, for example as shown in FIG. 5 (b) (d), from the time t ₀ when the driving signal S ₃ is inputted The next drive signal S ₃ in FIG.
Time to t ₁ but that is about half of the time until the input has elapsed
After maintaining the pulse A of 16 kHz, the signal is switched to the signal B of 2 kHz, and the state is changed until the time when the next drive signal S ₃ is output, for example, at time t _{2 at} 8 Hz and at time t ₃ at 4 Hz. I try to last. On the other hand, when 64 Hz is selected, the sixth
As in FIG. (D), the drive signal without particular relationship to the output time of the S _3, Figure 6 16kHz signal A at 2 second intervals in synchronism with the time signal S ₇ shown in (a) and 2kHz signal B And the pulse interval is periodically changed between 60 μsec and 500 μsec.

Therapeutic voltage generator 23, as shown specifically in the electric circuit diagram of FIG. 4, a booster circuit 40 of the chopper type, pulse width and pulse interval by the drive signal S ₃ output from the control signal generator 22 a high-voltage pulse generating circuit 41 for generating a high voltage pulse signal S ₁₃ is restricted, the formed high-voltage pulse signal
A circuit 42 for limiting the output of the S _13, composed of circuit 43 to be converted output polarity.

Booster circuit 40, the current supplied from the battery 45 for large choke coil 44 inductance, the boost signal S ₂
In be one that utilizes a counter electromotive force of the coil 44 which occurs when the on-off control to being controlled high speed transistor 46 for switching the pulse signal S ₁₄ of the high voltage generated between the collector and emitter of the transistor 46 Is integrated by a capacitor 48 through a diode 47,
The Zener voltage of the constant voltage diode 49 connected in parallel with the voltage is increased up to about 70 [V] as an upper limit. At the same time, through the diode 50, the terminal voltage of the capacitor 51 on the high-voltage pulse generating circuit 41 side is also increased by the capacitor 48 on the boosting circuit 40 side.
To the same potential as. By connecting the capacitors 48 and 51 with a diode 50 instead of a conventional resistor, the charging of the capacitors 48 and 51 is prevented from being delayed in time, while the backflow from the capacitor 51 to the 48 is prevented during discharging. Thus, the charged electric charge is effectively used as a treatment pulse.

The high-voltage pulse generation circuit 41 has a first
A switching transistor 52 is connected between the capacitor 51 and the output limiting circuit 42 by a second switching transistor 53.
With each interposed, and the first and second transistors 52, 53 described above, substantially off control simultaneously by the third switching transistor 54 to be on-off controlled by the driving signal S ₃ output from the control signal generator 22 It is configured like this. With this configuration, normally in conjunction with the but off all the first to third switching transistors 52, 53, 54, the driving signal S ₃ is inputted to the base terminal of the third transistor 54 the When the transistor 54 is turned on and the first and second transistors 52 and 53 are turned on, the capacitors 48 and 51 are connected in series to connect the capacitors 48 and 51 to each other.
Thereby boosted to the extent 140 [V] of double the voltage value stored individually in 51, after sending the boosted voltage to the output side, after the lapse of time is regulated by a pulse width of the drive signal S ₃ the first to third transistors 52, 53, 54 by turning off the pulse width is in the manner to form a pressure pulse signal S ₁₃ which is limited to about 120μ sec.

Output limiting circuit 42, a variable resistor 20 whose resistance value in conjunction with the ON operation of the power switch 19 is changed, by interposed in series in the output circuit of the high-voltage pulse signal S _13,
Change the dividing ratio of the peak voltage of the therapeutic pulse signal S ₁ output from the output terminal 12, and the like can be continuously changed manually electrical stimulation by the current flowing through the affected area.

The output polarity conversion circuit 43 includes two switch contacts 14a and 14b, which are switched in an interlocking manner, in parallel with a resistor 55 connected in series with the output limiting circuit 42. by the way can reverse the direction of, and can be applied a therapeutic pulse signals S ₁ of a desired polarity Shirubeko 4.4 side.

The display unit 24 includes a display element 17 such as a light emitting diode on the front side of the main body case 10, and controls a current flowing from the battery 45 toward the display element 17 by a switching transistor 56. 56 off timing, by regulating with a boosting signal S ₂ output from the control signal generator 22, causes in conjunction with the start of the boost operation is turned only the output period of the therapeutic pulse signal S _1, the step-up in response to the pulse rate of the signal S _2, the display brightness of the visual changes to the five stages is performed. That is, when the driving signal S ₃ shown in FIG. 6 selects the mode of 16m sec intervals,
Since the boost signal S ₂ to 16kHz and 2kHz at 2 second intervals switched, the display device 17 displays repeating light and dark every 2 seconds is made. Next, when the driving signal S ₃ to 125m sec interval of FIG. 5 (a), the repeating pulse signals A and B for each half cycle, a somewhat darker display than if the result 16kHz persists. Further, the drive signal S ₃ at 250 ms intervals shown in FIG.
Is selected, the ratio of the signal A of 16kHz becomes one quarter in one cycle.
The display is reduced to the extent that the display feels brighter than when only the 2 kHz signal B is continuous, and a display that changes according to the selected operation mode is performed.

Incidentally, it can be switched using by increasing the kinds of pulse signals A · B constituting the boosting signal S ₂ 3 or more,
The frequency and the pulse width can also be changed and changed appropriately.

Also, when switching the pulse signals of A · B in tandem with the drive signal S _3, it is possible to change the ratio between the two and output order, for example, time period of the frequency A in FIG. 5 (d) t ₂ By extending the drive signal S ₃ to 4 and
In either case of 8 Hz, may be as switches the frequency of the boost signal S ₂ for each half cycle of the driving signal S _3.

Furthermore, even when selecting a drive signal S ₃ of 4Hz or 8 Hz, may be as performing amplitude control of the therapeutic pulse signals S ₁ at time signal S _7.

[Effect of the Invention] The present invention as described above, with the frequency of the boost signal S ₂ having as a on-off control of the switching means constituting the booster circuit 40 is composed of different pulse signal A · B,
Since the signal B of lower frequency by itself it was set so as Shitamawaru the regulation value due to the constant voltage means, by simply increasing or decreasing the rate or duration of the signal B, the amplitude control of the therapeutic pulse signal S _1, or The power saving of the booster circuit 40 is achieved, and various treatment modes can be realized without complicating the structure.

Further, by performing the display control of the display device 17 by using a boost signal S _2, with a simple configuration, such as enabling the display corresponding to the operating mode, a number of advantages.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a basic configuration of the present invention. 2 to 4 show an embodiment of the present invention, FIG. 2 is a front view showing an external configuration, FIG. 3 is a block diagram illustrating a schematic configuration of an electronic circuit, FIG. FIG. 4 is an electric circuit diagram showing a specific configuration of FIG. 5 and 6 are explanatory diagrams showing the relationship between the drive signal and the boost signal. FIGS. 5A and 5B show a case where the pulse interval of the drive signal is short. 6 (d) show the case where the voltage is long, and FIGS. 6 (a) to 6 (e) show the case where the boost signal is controlled using the time signal. S ₁ … therapeutic pulse signal, S ₂ … boost signal, S ₃ … drive signal, 17… display element, 40… boost circuit, 41… high voltage pulse generating circuit, 44… coil, 45… ... batteries, 46 ... switching transistors, 48 ... capacitors, 49 ... constant voltage diodes.

Claims (4)

(57) [Claims] And 1. A OFF timing by the step-up signal S ₂ is controlled to interrupt the current flowing from the battery (45) to the coil (44) switching means, a high-voltage pulse signal S ₁₄ which is formed during the intermittent by said switching means A booster circuit (40) comprising: a capacitor (48) for integration; and a constant voltage means connected in parallel with the capacitor (48) and regulating a voltage value integrated in the capacitor (48) to a predetermined constant voltage or less.
When a high voltage formed in the step-up circuit (40), in conjunction with input of the driving signal S _3, and a high voltage pulse generating circuit (41) for taking out only the time corresponding to the pulse width of the drive signal S ₃ a low-frequency electric therapy apparatus having a boost signal S ₂ and the drive signal S ₃ described above respectively, with frequency is composed of at least (a · B) and (a · b) pulse train that changes in high and low stages of , when selecting the frequency a the higher as at least a drive signal S _3, the lower the frequency B in the pulse train of the boost signal S ₂
And it alone is set to a value Shitamawaru the regulation value due to the constant voltage means, further at predetermined time intervals, low-frequency electric therapy apparatus, wherein the switching frequency A · B of the boost signal S ₂ periodically. Of 2. A boost signal S ₂ described above the frequency A · B, the time signal S ₇ output from the frequency dividing means, is periodically changed with sufficient time interval longer than the period of the driving signal S ₃ The low frequency treatment device according to claim 1. Frequency A · B of wherein boost signal S ₂ described above is for changes in synchronization with the drive signal S ₃ described above, at least a predetermined time during one cycle of the driving signal S _3, lower 2. The low-frequency treatment device according to claim 1, wherein a pulse train having a frequency B is output. By wherein boost signal S ₂ described above, the display device (1
The low-frequency treatment device according to any one of claims 1 to 3, wherein the timing of energizing the 7) is regulated.