Physiotherapy waveform processing circuit and physiotherapy instrument

Abstract

The utility model provides a physiotherapy waveform processing circuit and a physiotherapy instrument, and relates to the technical field of physiotherapy instruments, the physiotherapy waveform processing circuit comprises a signal power amplification processing module, a power output processing module, a boost output module and a load detection module which are connected in sequence, the power output processing module comprises a switching tube, and the switching tube is arranged between the output end of the power output processing module and the boosting transformer and used for receiving a control signal to control conduction between the power output processing module and the boosting transformer. The problem that in the prior art, when a physical therapy function is not started, a human body is subjected to a high stimulation signal, and the use experience is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of physical therapy equipment, in particular to a physical therapy waveform processing circuit and a physical therapy instrument. Background Art

[0002] The physiotherapy waveform processing circuit in the existing physiotherapy instrument, such as Figure 2 As shown, before the therapy function is turned on, since there is no signal input to pin 4 of the power amplifier chip, the output pin of the power amplifier chip will continue to output a high-level signal, which will quickly charge and discharge the primary coil of the boost transformer in the therapy waveform processing circuit.

[0003] Since the above process will cause the secondary coil of the above-mentioned step-up transformer to quickly generate an induced current, and then the current will be discharged to the human body through the output interface, the human body will be exposed to a higher stimulation signal when the physical therapy function is not turned on, affecting the user experience. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a physiotherapy waveform processing circuit and a physiotherapy instrument, which solves the problem in the prior art that when the physiotherapy function is not turned on, the human body will also be exposed to a high stimulation signal, affecting the user experience.

[0005] At least one embodiment of the present utility model provides a physical therapy waveform processing circuit, comprising: a signal power amplification processing module, a power output processing module, a boost output module and a load detection module connected in sequence, wherein:

[0006] The boost output module includes a boost transformer, and the power output processing module includes a switch tube, which is arranged between the output end of the power output processing module and the boost transformer, and is used to receive a control signal to control the conduction between the power output processing module and the boost transformer.

[0007] The technical solution disclosed by the utility model has at least the following beneficial effects:

[0008] A switch tube is used to control the conduction between the output end of the power output processing module and the boost transformer. When the physical therapy function is not turned on, the switch tube is used to cut off the line between the power output processing module and the boost output module to prevent the high-level signal output by the power amplifier chip from passing through the power output processing module and the boost output module in sequence and stimulating the human body, thereby increasing the user experience. After the physical therapy function is turned on, the switch tube can be activated by a control signal to reconnect the line between the power output processing module and the boost output module, thereby not affecting normal use.

[0009] In a physical therapy waveform processing circuit provided in one embodiment of the present invention, it also includes: a charging filter shaping unit, which is connected to the switching tube to receive the control signal and transmit it to the switching tube.

[0010] The beneficial effects of adopting the above scheme are:

[0011] Through the charging filter shaping circuit, when the control signal is transmitted to the switch tube, the switch tube can be slowly opened, so that the signal output from the output end of the power output processing module is also a slowly rising signal, thereby reducing current fluctuations and increasing user experience during physical therapy of the human body.

[0012] In a physical therapy waveform processing circuit provided in one embodiment of the present invention, the switching tube is an N-channel MOS tube, the output end of the power output processing module is connected to the boost transformer through the source and drain of the MOS tube, and the charging filter shaping unit is connected to the gate of the MOS tube.

[0013] The beneficial effects of adopting the above scheme are:

[0014] By using an N-channel MOS tube, the purpose of controlling the conduction between the power output processing module and the boost output module can be achieved by controlling the gate of the MOS tube.

[0015] In a physical therapy waveform processing circuit provided in one embodiment of the present invention, the charging filtering and shaping unit includes a resistor R166 and a capacitor C123, one end of the resistor R166 is connected to a signal terminal to receive the control signal, the other end of the resistor R166 is connected to one end of the capacitor C123, the other end of the resistor R166 is also connected to the gate of the MOS tube, and the other end of the capacitor C123 is connected to the source of the MOS tube.

[0016] The beneficial effects of adopting the above scheme are:

[0017] The RC charging filter unit composed of resistor R165 and capacitor C123 can control the source and drain of the MOS tube to open slowly.

[0018] In a physical therapy waveform processing circuit provided in one embodiment of the present invention, a bias resistor R165 is also included, and two ends of the bias resistor R165 are respectively connected to the source and gate of the MOS tube.

[0019] The beneficial effects of adopting the above scheme are:

[0020] The bias resistor R165 is used to divide the voltage and prevent the source and gate of the MOS tube from being damaged when it malfunctions.

[0021] In a physical therapy waveform processing circuit provided in one embodiment of the present invention, the source of the MOS tube is connected to the first common terminal.

[0022] In a physical therapy waveform processing circuit provided in one embodiment of the present invention, it also includes a transient voltage absorption unit, and the transient voltage absorption unit is connected to the step-up transformer to absorb the transient induced voltage generated by the switching of the step-up transformer.

[0023] The beneficial effects of adopting the above scheme are:

[0024] The instantaneous voltage absorption unit absorbs the instantaneous high voltage generated when the step-up transformer is disconnected, thereby preventing the human body from receiving stimulation signals when the step-up transformer is disconnected, thereby increasing the user experience.

[0025] In a physical therapy waveform processing circuit provided by one of the embodiments of the present invention, the output end of the power output processing module is connected to the primary coil of the step-up transformer through a switching tube, the instantaneous voltage absorption unit includes a capacitor C121 and a resistor R163, and one end of the primary coil is connected to the other end of the primary coil through the capacitor C121 and the resistor R163 in turn.

[0026] The beneficial effects of adopting the above scheme are:

[0027] By connecting the capacitor C121 and the resistor R163 in parallel at both ends of the primary coil, the instantaneous high voltage generated on the primary coil when the step-up transformer is turned off can be absorbed.

[0028] In a physical therapy waveform processing circuit provided in one embodiment of the present invention, it also includes an MCU control chip, and the MCU control chip is connected to the switch tube to send the control signal to the switch tube.

[0029] The beneficial effects of adopting the above scheme are:

[0030] The MCU control chip can be used to conveniently and efficiently send control signals and control the opening and closing of the switch tube.

[0031] One embodiment of the present invention further provides a physical therapy apparatus, comprising a physical therapy waveform processing circuit as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the connection relationship of the functional modules of a physical therapy waveform processing circuit of the utility model;

[0033] Figure 2 This is the existing physiotherapy control circuit diagram;

[0034] Figure 3This is a schematic diagram of the connection relationship between various functional modules and corresponding components in a physical therapy waveform processing circuit of the utility model;

[0035] Figure 4 This is a schematic diagram of the connection relationship of various components in a physical therapy waveform processing circuit of the utility model;

[0036] Figure 5 The utility model is a schematic diagram of the specific connection relationship between the boost transformer, the charging filter shaping unit, the switch tube and the instantaneous high-voltage absorption unit. DETAILED DESCRIPTION

[0037] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0038] Furthermore, those skilled in the art may combine and associate different embodiments or examples and features of different embodiments or examples described in this specification without mutual contradiction.

[0039] The control circuit in the existing physiotherapy instrument can refer to Figure 2 As shown, when the power amplifier chip U22 is powered on, the positive electrode of the power supply enters the 5th pin of the power amplifier chip U22, and the negative electrode enters the 3rd pin of the power amplifier chip U22. When the signal of the 1VINA2 interface (represented by 1VINA2 in each figure) is at a low level of 0, there is no signal input to the 1st pin of the power amplifier chip U22, and the 4th pin of the U22 chip will output a high level. The high level is sequentially charged through the inductor L15, the resistor R140 and the capacitor C120 to quickly charge the primary coil of the step-up transformer T3, and then through the capacitor C1 22 quickly discharges to the ground. At this time, the secondary coil of the step-up transformer T3 will generate a high voltage due to the rapid induced electricity of the primary coil. The high voltage is discharged to the human body through the resistor R143, the resistor R164 and the diode D20 to the output interface OUT2_P (represented by OUT2_P in each figure) and the output interface OUT2_N (represented by OUT2_N in each figure), so that the human body will feel a high stimulation signal when the physical therapy function is not turned on, affecting the experience.

[0040] The utility model provides a physical therapy waveform processing circuit, please combine Figure 1 as well as Figure 3 As shown, it includes: a signal power amplification processing module, a power output processing module, a boost output module and a load detection module connected in sequence, wherein:

[0041] Figure 3In the figure, module A1 is a signal power amplification processing module, which can be used to input a low-power signal and output a high-power signal; module A2 is a power output processing module, which is used to perform switch processing on the high-power signal to remove the high-voltage useless clutter signal generated by the switch signal; module A3 is a boost output module, which is used to convert the processed switch signal into an intermediate frequency signal useful for human body therapy and output it; module A4 is a load detection module, which is used to detect whether the output intermediate frequency signal is used by the human body.

[0042] The boost output module includes a boost transformer T3, and the power output processing module includes a switch tube, which is arranged between the output end of the power output processing module and the boost transformer T3, and is used to receive a control signal to control the conduction between the power output processing module and the boost transformer T3.

[0043] In the above structure, the switch tube can be used to control the conduction between the output end of the power output processing module and the boost transformer T3. When the physical therapy function is not turned on, the switch tube is used to cut off the line between the power output processing module and the boost output module to prevent the high-level signal output by the power amplifier chip U22 from passing through the power output processing module and the boost output module in sequence and stimulating the human body, thereby increasing the user experience; after the physical therapy function is turned on, the switch tube can be activated by a control signal to re-connect the line between the power output processing module and the boost output module, thereby not affecting normal use.

[0044] Specifically, the circuit further includes: a charging filter and shaping unit, which is connected to the switch tube to receive the control signal and transmit it to the switch tube.

[0045] In the above structure, the charging filter shaping circuit can be used to slowly open the switch tube when the control signal is transmitted to the switch tube, so that the signal output from the output end of the power output processing module is also a slowly rising signal, thereby reducing current fluctuations and increasing user experience during physical therapy of the human body.

[0046] Specifically, please combine Figure 3 , Figure 4 and Figure 5 As shown, the switch tube is an N-channel MOS tube Q11, the output end of the power output processing module is connected to the boost transformer T3 through the source and drain of the MOS tube Q11, and the charging filter shaping unit is connected to the gate of the MOS tube Q11.

[0047] In the above structure, an N-channel MOS transistor Q11 is used, and the purpose of controlling the conduction between the power output processing module and the boost output module can be achieved by controlling the gate of the MOS transistor Q11.

[0048] Specifically, the charging filter shaping unit includes a resistor R166 and a capacitor C123, one end of the resistor R166 is connected to a signal terminal to receive a control signal, the other end of the resistor R166 is connected to one end of the capacitor C123, the other end of the resistor R166 is also connected to the gate of the MOS tube, and the other end of the capacitor C123 is connected to the source of the MOS tube.

[0049] In the above structure, the RC charging filter unit composed of the resistor R165 and the capacitor C123 can be used to control the source and drain of the MOS tube Q11 to open slowly.

[0050] Specifically, the circuit further includes a bias resistor R165, and two ends of the bias resistor R165 are respectively connected to the source and the gate of the MOS tube Q11.

[0051] In the above structure, the bias resistor R165 can be used to divide the voltage and prevent the source and gate of the MOS tube Q11 from being damaged when it malfunctions.

[0052] Specifically, the source of the MOS transistor Q11 is connected to the first common terminal (denoted by GND-A in each figure).

[0053] Specifically, the circuit further includes a transient voltage absorption unit, which is connected to the step-up transformer T3 to absorb the transient induced voltage generated when the step-up transformer T3 is turned off.

[0054] In the above structure, the instantaneous high voltage generated when the step-up transformer T3 is disconnected can be absorbed by the instantaneous voltage absorption unit, thereby preventing the human body from receiving stimulation signals when the step-up transformer T3 is disconnected, thereby increasing the user experience.

[0055] Specifically, the output end of the power output processing module is connected to the primary coil of the boost transformer T3 through a switch tube, the transient voltage absorption unit includes a capacitor C121 and a resistor R163, and one end of the primary coil is connected to the other end of the primary coil through the capacitor C121 and the resistor R163 in turn.

[0056] In the above structure, the capacitor C121 and the resistor R163 can be connected in parallel at both ends of the primary coil to absorb the instantaneous high voltage generated on the primary coil when the step-up transformer T3 is turned off.

[0057] Specifically, the circuit also includes an MCU control chip, which is connected to the switch tube to send a control signal to the switch tube.

[0058] In the above structure, the MCU control chip can be used to conveniently and efficiently send control signals and control the opening and closing of the switch tube.

[0059] After adopting the above solution:

[0060] When the power amplifier chip U22 is powered on, the positive pole of the power supply enters pin 5 of the power amplifier chip U22, and the negative pole enters pin 3 of the power amplifier chip U22. When the signal at the input interface 1VINA2 is low level 0, there is no signal input to pin 1 of the power amplifier chip U22, and pin 4 of the power amplifier chip U22 will output a high level. At this time, the MCU control chip does not output a control signal to the signal interface Amplifier-A (represented by Amplifier-A in the accompanying drawings), so the MOS tube Q11 cannot be turned on to the ground, and the circuit composed of the inductor L15, the resistor R140, the capacitor C120, the boost transformer T3, the capacitor C122 and the MOS tube Q11 components cannot form a loop, and the secondary coil of the boost transformer T3 will not generate a high voltage to discharge to the human body through the output interfaces OUT2_P and OUT2_N.

[0061] When the MCU control chip needs to output a medium-frequency therapy signal to the input interface 1VINA2, the MCU control chip will give a signal of a certain frequency (several hundred kilohertz) to the signal interface Amplifier-A in advance and then output it at a high level. The signal is charged through an RC filter shaping unit composed of resistor R166 and capacitor C123, so that the voltage of the signal is given to the gate of the MOS tube Q11 from low to high and is slowly opened to the ground until it is fully opened. At this time, the voltage obtained by the primary coil of the step-up transformer T3 is also a slowly rising DC voltage. The secondary coil of the step-up transformer T3 obtains an induced potential and outputs a medium-frequency therapy signal to perform medium-frequency therapy on the human body.

[0062] One embodiment of the present invention further provides a physical therapy apparatus, comprising a physical therapy waveform processing circuit as described above.

[0063] This physical therapy instrument will not output a useless stimulation voltage to the human body when it is turned on and no intermediate frequency signal is output, so that users will have a better experience during physical therapy and the circuit will be safer and more reliable.

[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A physical therapy waveform processing circuit, characterized in that: include: The signal power amplification processing module, the power output processing module, the boost output module and the load detection module are connected in sequence, wherein: The boost output module includes a boost transformer, and the power output processing module includes a switch tube, which is arranged between the output end of the power output processing module and the boost transformer, and is used to receive a control signal to control the conduction between the power output processing module and the boost transformer.

2. A physical therapy waveform processing circuit according to claim 1, characterized in that: Also includes: A charging filter and shaping unit is connected to the switch tube to receive the control signal and transmit it to the switch tube.

3. A physical therapy waveform processing circuit according to claim 2, characterized in that: The switch tube is an N-channel MOS tube, the output end of the power output processing module is connected to the boost transformer through the source and drain of the MOS tube, and the charging filter shaping unit is connected to the gate of the MOS tube.

4. A physical therapy waveform processing circuit according to claim 3, characterized in that: The charging filter shaping unit includes a resistor R166 and a capacitor C123, one end of the resistor R166 is connected to a signal terminal to receive the control signal, the other end of the resistor R166 is connected to one end of the capacitor C123, the other end of the resistor R166 is also connected to the gate of the MOS tube, and the other end of the capacitor C123 is connected to the source of the MOS tube.

5. A physical therapy waveform processing circuit according to claim 4, characterized in that: It also includes a bias resistor R165, and two ends of the bias resistor R165 are respectively connected to the source and the gate of the MOS tube.

6. A physical therapy waveform processing circuit according to claim 4, characterized in that: The source of the MOS tube is connected to the first common terminal.

7. A physical therapy waveform processing circuit according to claim 1, characterized in that: It also includes a transient voltage absorption unit, which is connected to the step-up transformer to absorb the transient induced voltage generated when the step-up transformer is turned off.

8. A physical therapy waveform processing circuit according to claim 7, characterized in that: The output end of the power output processing module is connected to the primary coil of the step-up transformer through a switch tube, the transient voltage absorption unit includes a capacitor C121 and a resistor R163, and one end of the primary coil is connected to the other end of the primary coil through the capacitor C121 and the resistor R163 in turn.

9. A physical therapy waveform processing circuit according to claim 1, characterized in that: It also includes an MCU control chip, which is connected to the switch tube to send the control signal to the switch tube.

10. A physical therapy apparatus, characterized in that: It comprises a physical therapy waveform processing circuit as described in any one of claims 1 to 9.

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