JP2866492B2 - Drive circuit of tapping massage machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving circuit for a beating massage machine applied to a health device for eliminating stiff shoulders and the like.

[0002]

2. Description of the Related Art As a first conventional example, a zero-cross point is obtained by rectifying an AC power supply to charge a capacitor to a certain voltage, and further varying the charging resistance to set a delay time from the zero-cross point of the AC power supply. In some cases, a signal with a delay of an arbitrary phase is generated, and then a pulse voltage is applied to an electromagnetic solenoid (for example, Japanese Patent Publication No. 55-26862).
No., JP-A-60-48747).

As a second conventional example, a pulse signal having a certain phase (time) is generated by using a resistor and a capacitor by using a DC voltage generated by rectifying an AC power supply.
In the case of 0 Hz, the time width of the pulse voltage applied to the electromagnetic solenoid is made substantially equal to a half cycle of 60 Hz, so that even if there is a difference in the frequency (60/50 Hz) of the AC power supply, the same tapping force is applied regardless of the frequency. Some of them were obtained (for example, JP-A-55-141241).

[0004]

In the first conventional example, when the frequency (50/60 Hz) of the AC power supply is different, the application time of the pulse voltage applied to the electromagnetic solenoid is different.
Since the application time in the case of 0 Hz is longer than that in the case of 60 Hz, there is a problem that the tapping force as the tapping massage machine is different. In addition, since the power consumption of the electromagnetic solenoid differs depending on the frequency, it is necessary to limit the specified value of the temperature rise of the coil to 50 Hz, but as a result, sufficient tapping force may not be obtained at 60 Hz. There was a problem.

In the second conventional example, since the cycle is fixed to a half cycle of 60 Hz, the tapping force as a tapping massage machine cannot be changed by changing the application time of the pulse voltage applied to the electromagnetic solenoid. There was a point. Therefore, an object of the present invention is to provide a driving circuit for a tapping massage machine that can make the pulse voltage applied to the electromagnetic solenoid substantially the same even if the frequency of the AC power source is different and that can vary the time width of the pulse voltage. That is.

[0006]

According to a first aspect of the present invention, there is provided a driving circuit for a tapping massage machine, comprising: an electromagnetic solenoid connected to an AC power supply for operating an attachment for tapping a tapping portion;
A phase control circuit connected in series to the electromagnetic solenoid for controlling the electromagnetic solenoid; and a phase for generating a detection signal delayed by a predetermined phase within a half cycle from the first zero crossing point of one cycle of the AC voltage of the AC power supply. A control circuit that has a detection circuit and a charging circuit that starts charging with the AC power supply in response to the detection signal and that generates a control signal when a charging voltage based on a voltage of a second half cycle of the AC voltage exceeds a predetermined voltage. A signal generation circuit; and a trigger signal generation circuit that receives the control signal when a predetermined set time has elapsed and generates a trigger signal to be input to the phase control circuit.

According to a second aspect of the present invention, in the driving circuit for a beating massage machine, the charging circuit of the first aspect is configured such that the charging circuit of the control signal generating circuit is configured to charge the AC voltage in a voltage direction of a half cycle of the first half of the one cycle. The resistance is smaller than the charging resistance in the voltage direction of the latter half cycle.

[0008]

According to the driving circuit of the tapping massage machine of the first aspect, the phase detection circuit generates a detection signal at a phase angle delayed by a predetermined phase within a half cycle from the first zero cross point of one cycle of the AC power supply. The charging circuit of the control signal generation circuit starts charging in response to the detection signal, but when the phase angle is 1
At 80 degrees, it is charged in the voltage direction of the second half cycle of the AC voltage, and when the phase angle is less than 180 degrees, it is charged first in the voltage direction of the first half cycle of the AC voltage, In the voltage direction, the charging voltage is reduced to zero and then charged in the same direction. At this time, the charging time from the start of charging to the zero crossing point, which is the end point of the first half cycle, and the charging time from the zero crossing point to the charging voltage becoming zero in the second half cycle are the time constants of the charging circuit. Equal for the same. The control signal generation circuit outputs a control signal when the charging voltage of the charging circuit is charged in the voltage direction of the latter half cycle of the AC voltage and reaches a predetermined voltage. The trigger signal generation circuit receives the control signal when a predetermined set time has elapsed, generates a trigger signal, and inputs the trigger signal to the phase control circuit. The phase control circuit is turned on in response to the trigger signal, and applies a pulse voltage having a time width until the zero cross point of the AC power supply is reached to the electromagnetic solenoid. Thereby, the electromagnetic solenoid operates to operate the attachment.

In this case, the time width of the pulse voltage is from the time of a half cycle of the AC voltage to the first half of the cycle of the AC voltage in the second half of the cycle of the AC voltage until the charging voltage becomes zero from the zero crossing point. It is obtained by subtracting the sum of the time and the second time during which the charging voltage is charged from zero to a predetermined voltage. The second time is almost the same even if the frequency is different, but the first time is different depending on the frequency, and the time difference is equal to the time difference of a half cycle of the frequency because the phase angle of the detection signal is the same. Therefore, even if the frequency of the AC power supply differs, the time width of the pulse voltage applied to the electromagnetic solenoid can be made substantially the same. Also, by adjusting the time constant of the charging circuit of the control signal generation circuit, the width of the pulse voltage applied to the electromagnetic solenoid can be changed arbitrarily, so that even if the frequency of the AC power supply is different, almost the same tapping force can be obtained and knocked. The power can be changed.

[0010] According to the driving circuit of the tapping massage machine of the second aspect, in the first aspect, the charging circuit of the control signal generating circuit is in a voltage direction of a half cycle of a first half of one cycle of the AC voltage. Since the charging resistance is smaller than the charging resistance in the voltage direction of the latter half cycle, the charging is performed in the latter half cycle from the charging time of the first half cycle of the AC voltage from the start of charging of the charging circuit. The time from the zero-cross point to the point at which the potential becomes zero becomes longer. Therefore, the time difference can compensate for the time difference due to the difference in the frequency of the second time during which the charging circuit is charged from zero to a predetermined voltage in the latter half cycle of the AC voltage. Therefore, the time width of the pulse voltage when the frequency of the AC power supply is different can be made the same with higher accuracy.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. First, regarding the structure of the tapping massage machine, as shown in FIG. 2, an electromagnetic solenoid 1, a head cover 2 that covers the electromagnetic solenoid 1, and an attachment 3 that is a hit ball mechanically connected to the electromagnetic solenoid 1 near the head cover 2. , A connecting spring 4 for supporting the head cover 2 and the electromagnetic solenoid 1, and a handle 5 containing a drive circuit 19.

The electromagnetic solenoid 1 has a cylindrical coil frame 11.
The exciting coil 12 wound around the outer periphery of the
A fixed core 13 which is a yoke on the outer side of 2 is a main fixing member. The plunger 14 includes a movable core 15 housed in the coil frame 11 so as to be reciprocally movable, and a drive rod 16 fixed to one end of the movable core 15 and inserted through a through hole in the center of the fixed iron 13. Have been.

At the tip of the drive rod 16 of the plunger 14, an attachment 3 that can freely contact a struck portion such as a shoulder or waist.
Is fixed. A connecting member 4 is fixed to the fixed iron core 13, and the connecting member 4 has an elongated plate shape and has a predetermined spring constant. The handle 5 includes a switch 17 and a power cord 18.
And a driving circuit 19 connected to an AC power supply which is a commercial power supply for supplying an intermittent pulse voltage to the electromagnetic solenoid 1 is provided therein. Are connected and fixed.

The operation will be described. First, the power cord 18 is connected to the AC power supply, and the handle 5 is held in hand.
When the attachment 3 comes into contact with a struck portion such as a shoulder or a waist, the plunger 14 slides from a state shown by a solid line in FIG. 1 to a position shown by an imaginary line. When the switch 17 is turned on, a pulse voltage is applied to the exciting coil 12 of the electromagnetic solenoid 1 and a pulse current is supplied to the exciting coil 12. The plunger 14 of the electromagnetic solenoid 1 performs a suction operation, and the plunger 14 having a small mass and a small inertia is covered. The striking part is pushed in, and the pushing force (the pushing amount) is applied to the struck part through the attachment 3 as the striking force, and the striking operation is performed. Further, since a pulse voltage is applied to the excitation coil 12, after the pulse voltage ends, the plunger 14 is pushed back by the return force (load) of the hit portion, and returns to the state before the pulse voltage was applied to the excitation coil 12. . On the other hand, at the time of the tapping operation, the fixed portion of the electromagnetic solenoid 1 having a large mass and a large inertia with respect to the plunger 14 slightly moves up and down with respect to the hit portion due to the reaction force of the tapping force. By applying a suitable pulse voltage to the exciting coil 12 of the electromagnetic solenoid 1, the plunger 14 pushes the hit portion through the attachment 3 to perform a series of tapping operations.

Next, the driving circuit 1 of the tapping massage machine
9 will be described with reference to FIG. That is, the drive circuit 19 is connected to the AC power supply 24 and operates the electromagnetic solenoid 1 that operates the attachment 3 that strikes a hit portion.
A phase control circuit 25 connected in series to the electromagnetic solenoid 1 to control the electromagnetic solenoid 1;
A phase detection circuit 21 that generates a detection signal delayed by a predetermined phase within a half cycle from the first zero crossing point of one cycle of the AC voltage, and a charging circuit 26 that receives the detection signal and starts charging by an AC power supply 24. A control signal generating circuit 22 for generating a control signal when the charging voltage by the voltage of the latter half cycle of the AC voltage exceeds a predetermined voltage.
And a trigger signal generating circuit 23 that receives the control signal when a predetermined set time has elapsed and generates a trigger signal to be input to the phase control circuit 25.

The operation of each circuit will be described together with the operation. Each of FIGS. 3 and 4 shows a waveform of a portion shown in FIG. 1, and FIG.
FIG. 4 shows a case where the frequency of the AC power supply 24 is 60H.
This is the case for z. That is, the AC voltage shown in FIGS. 3 and 4A is applied to the phase detection circuit 21 by the AC power supply 24. When the AC voltage is in the first half of one cycle of the AC voltage, for example, the first zero crossing of the negative phase is performed. From the point
In the same negative potential as the Zener diode Vz _1, is charged with turning on the transistor Tr2 flows to the base current increases and the potential of the capacitor C ₆ to the transistor Tr ₂ by the time constant of capacitor C6 and resistor R20, 3 and 4 substantially zero potential after a predetermined phase angle or a predetermined time (phase) T ₀ as in (b). Since the base current to the transistor Tr ₂ at this time does not flow, the transistor Tr ₂ is first made to the period during the ON for a predetermined time T _0, will exhibit a detection signal by comprising the passage off after a predetermined time T _0. Diode D according the time constant of the rise and then the resistor R ₂₀ and capacitor C ₆ until the potential of the potential instantaneously Zener diode Vz ₁ of the capacitor C ₆ when the second half of the half cycle or positive phase of the next alternating voltage
Discharge through _4, it becomes substantially zero potential after a predetermined time T _0. Therefore, in this period transistor Tr ₂ remains off. Then also the AC voltage following one cycle half of the half cycle or a negative potential is momentarily Zener diode of the capacitor C ₆ the moment became phase of Vz
It becomes the same negative potential as ₁ and the same operation as above for a predetermined time T
During transistor Tr _{2 0} is possible to output a detection signal becomes then off turned on. In the embodiment, the predetermined time T ₀ is set to a half cycle of the AC power supply 24 of about 60 Hz. D ₃ denotes a diode, R
₁₉ and R ₂₁ are resistors.

The charging circuit 26 of the control signal generating circuit 23
In response to the detection signal of the phase detection circuit 21,
Star Tr_TwoIs turned off, the AC power supply 24
₁₇, R₁₈And capacitor C_FiveThe time constant of the capacitor C
_FiveStart charging. In this case, a 60 Hz AC power supply 2
In the case of 4, the predetermined time T₀Is a half cycle, that is, the phase angle is 1
Since the angle is set to 80 degrees, as shown in FIG.
In the last half cycle of one cycle of pressure
Charge from the zero crossing point, and connect with 50Hz AC power supply 24
That is, when the phase angle is less than 180 degrees, FIG.
So, the capacitor C_FiveIs the first half cycle of the AC voltage
That is, the battery is charged first with a negative potential,
After the charging voltage goes to zero when the potential becomes positive beyond the
It is charged in the positive potential direction. At this time, the first half cycle
Charge time T to zero crossing point due to AC voltage_FourAnd de
Charged and charged in the second half cycle from the Locross point
Time T until voltage becomes zero_FourBecause the time constants are the same
equal. Next, as shown in FIG. 3 and FIG.
Capacitor C_FivePositive potential direction (the latter half cycle
The charging voltage in the pressure direction) increases, and a predetermined voltage, that is, P
UT_TwoBecomes equal to the gate potential of PUT_TwoBecomes conductive
You. This is the capacitor C of the charging circuit 26_FiveThe charging voltage of
Time T from zero potential_Two, T_Two'Has passed. PU
T_TwoIs turned on, the transistor Tr₁Base current
Flow, transistor Tr₁Turns on. PUT_TwoIs exchange
The first half of the next cycle of the power supply 24
In other words, when the current is less than the holding current in the negative phase,
In this case, the transistor Tr₁Base current flows to
Disappeared transistor Tr₁Turns off. This tran
Jista Tr₁Is turned on and off
Sa C_FourAnd resistance R₈~ R₁₂Figure at position (d) of the circuit
3 and a control signal as shown in FIG. 4 (d).
Then, the resistance R of the charging circuit 26₁₇, R₁₈And capacitor C
_FiveBy changing the time constant of
R₁₈Adjust the charging time T_Two, T_Two’
Can be set to an arbitrary phase with respect to the AC power supply 24.
Wear. R₁₃~ R ₁₆Is resistance.

The trigger signal generation circuit 23 includes an AC power supply 24
To diode D_TwoRectified by the capacitor C_ThreeAnd resistance
R_Five, R₆The time constant of the capacitor C_ThreeAnd charge
Capacitor C_ThreePUT depending on the potential of₁The anode potential of
3 and as shown in each (e) of FIG.₁
Are as shown in FIGS. 3 and 4 (d).
In sync with the output of the control signal
3 and FIG. 4 at the circuit position (f).
The trigger signal of each (f) is output. This cycle T ₁Is con
Densa C_ThreeAnd resistance R_Five, R₆Is determined by the time constant
However, the variable resistor R₆Adjust
Can be changed. R ₇Is the resistance
You.

The phase control circuit 25 inputs the trigger signal to the gate of the thyristor SCR _1, a thyristor SCR ₁ becomes conductive by trigger signals, time T _OUT as the (g) of FIG. 3 and FIG. 4, T _OUT ′ pulse voltage is applied to the electromagnetic solenoid 1. The resistor R ₁ and the capacitor C ₁ are a snubber circuit for protecting the thyristor SCR ₁ , and R ₂ is a gate resistor.

The diode D₁And the resistance R_Three, R_Four
And the capacitor C_TwoIs the control power of the control signal generation circuit 22 and the like.
The source voltage circuit. Thermo switch Th₁Is electromagnetic
A specified value at which the temperature of the exciting coil 12 of the solenoid 1 rises
For shutting off the AC power supply 24 in the case of the above
It is. Here, the predetermined time T of the phase detection circuit 21₀Haho
It is set to a half cycle of AC power supply 24
Therefore, the AC voltage is 50 Hz as shown in FIG.
, The capacitor C5 of the charging circuit 26 is a half of 50 Hz.
10 ms of cycle and predetermined time T₀That is, 60 Hz
The period of time difference from 8.3 ms of a half cycle, that is, time T4
The positive voltage of the AC power supply 24 after being charged in the negative direction
Will be charged in the positive direction, and the overall charge
Time or time T₀PUT after elapse of _TwoIs on
Time T until_ThreeIs T_Three= 2 × T_Four+ T_Two’. one
When the AC power supply 24 is 60 Hz, it is shown in FIG.
The capacitor C of the charging circuit 26_FiveIs charged in the negative direction
Charging in the positive direction only
Is time T_ThreeTime T2 is shorter. Well, here
As we did, T_Four= 10ms-8.3ms,
The application time of the pulse voltage applied to the electromagnetic solenoid 1 is
At 50 Hz, T_out'= 10ms-T_Four-T_Two′ = 10 ms− (10 ms−8.3 ms) −T_Two'= 8.3 ms-T_Two’Also at 60 Hz, T_out= 8.3ms-T_TwoIt is.
Therefore, T_Two= T_Two’, Then T_out’= T_outTona
You. That is, the frequency of the AC power supply 24 (50 / 60H
Applying pulse voltage to electromagnetic solenoid 1 even if z) is different
Time T_out’, T_outCan be equivalent. Swat for this
The tapping power as a massage machine can be made equal,
Interval T_Two, T_Two’To the capacitor C of the charging circuit 26._Fiveand
Resistance R₁₇, R₁₈Can be set arbitrarily by changing
Therefore, the tapping force can also be changed arbitrarily.

Further, since the same pulse voltage can be applied even if the frequency of the AC power supply 24 is different, the power consumption of the electromagnetic solenoid 1 can be made the same regardless of the frequency.
The device providing side can set so that the power of the electromagnetic solenoid 1 is fully exerted when the temperature rise of the exciting coil 12 is suppressed to a certain prescribed value. FIGS. 5 and 6 show a second embodiment of the present invention. That is, the charging circuit 26 of the control signal generating circuit 22 in the first embodiment, the charging resistor R ₂₂ when AC voltage is voltage direction of the half-cycle of the first half of one cycle, when the voltage direction of the second half of the half cycle It is made smaller than the charging resistor R _17. In the embodiment are connected in parallel with the resistor R ₂₂ and diode D charging resistor R ₁₇ to the series circuit diode D ₅ is oriented in the direction of the negative direction, that is the first half of the half cycle of _5.

Incidentally, in the case of the first embodiment, the charging circuit 2
The charging times T ₂ and T ₂ ′ of 6 are 50 Hz and 60 H
Although the time constant is the same for z, at the frequency of 50 Hz and 60 Hz, the AC voltage itself during the charging time is different, so that T ₂ = T ₂ ′ is not accurate, and T ₂ ′ is slightly smaller than T _2. △ T = T ₂ −T ₂ ′.

On the other hand, in the case of this embodiment,
Charge resistance R_{twenty two}Is the charging resistance R₁₇Smaller than the charging circuit
26 capacitor C6 charging time T_Four, T_Four′ In FIG.
T as in (c)_Four’> T_FourAnd the difference ΔT ′ = T
_Four'-T_FourIs set to ΔT = ΔT ′ to obtain an electromagnetic solenoid.
Application time T of the pulse voltage of the solenoid 1 _out’, T_outExchange
Even if the frequency of the power supply 24 is different, the same
So the tapping force can be even more
You.

In this embodiment, the handy massage machine is used by being held by the user, but may be applied to other large massage machines such as chairs and beds.

[0025]

According to a first aspect of the present invention, a drive circuit for a tapping massage machine is connected to an AC power supply to operate an attachment that taps a hitting portion, and is connected in series to the electromagnetic solenoid to control the electromagnetic solenoid. A phase control circuit that generates a detection signal delayed by a predetermined phase within a half cycle from the first zero crossing point of one cycle of the AC voltage of the AC power supply, and the AC power supply that receives the detection signal. A control signal generating circuit having a charging circuit for starting charging and generating a control signal when a charging voltage based on a voltage of a half cycle of the latter half of the AC voltage exceeds a predetermined voltage; and A trigger signal generating circuit for receiving a control signal and generating a trigger signal to be input to the phase control circuit, so that the frequency of the AC power supply is different. Can also be substantially the same time width of the pulse voltage applied to the electromagnetic solenoid. Also, by adjusting the time constant of the charging circuit of the control signal generation circuit, the width of the pulse voltage applied to the electromagnetic solenoid can be changed arbitrarily, so that even if the frequency of the AC power supply is different, almost the same tapping force can be obtained and knocked. The effect is that the force can be changed.

According to a second aspect of the present invention, in the driving circuit of the tapping massage machine, the charging resistor is provided when the charging circuit of the control signal generating circuit is in a voltage direction of a first half cycle of one cycle of the AC voltage. Is smaller than the charge resistance in the voltage direction of the latter half cycle,
The time width of the pulse voltage in the case where the frequency of the AC power supply is different can be made the same more accurately.

[Brief description of the drawings]

FIG. 1 is a drive circuit diagram of a tapping massage machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the entire structure.

FIG. 3 is a waveform diagram of each part of the circuit when the AC power supply is 50 Hz.

FIG. 4 is a waveform diagram of each part of the circuit when the AC power supply is 60 Hz.

FIG. 5 is a drive circuit diagram of a second embodiment.

FIG. 6 is a waveform diagram of each part of the circuit when the AC power supply is 50 Hz.

[Explanation of symbols]

 Reference Signs List 1 electromagnetic solenoid 21 phase detection circuit 22 control signal generation circuit 23 trigger signal generation circuit 24 AC power supply 25 phase control circuit 26 charging circuit

Claims (2)

(57) [Claims] 1. An electromagnetic solenoid connected to an AC power supply for operating an attachment for hitting a hit portion, a phase control circuit connected in series to the electromagnetic solenoid for controlling the electromagnetic solenoid, and an AC voltage of the AC power supply. Of 1
A phase detection circuit that generates a detection signal delayed by a predetermined phase within a half cycle from the first zero crossing point of the cycle, and a charging circuit that receives the detection signal and starts charging with the AC power supply, the second half of the AC voltage A control signal generating circuit for generating a control signal when a charging voltage based on a voltage of a half cycle exceeds a predetermined voltage, and a trigger signal input to the phase control circuit upon receiving the control signal when a predetermined set time has elapsed And a trigger signal generating circuit for generating a driving signal. 2. The charging circuit of the control signal generating circuit, wherein the charging resistance when the AC voltage is in the voltage direction of the first half cycle of the one cycle is a charging resistance when the AC voltage is in the voltage direction of the second half cycle. Claim 1 which is smaller than
The driving circuit of the tapping massage machine described.