Protection circuit of laser therapeutic instrument and laser therapeutic instrument

Abstract

The invention relates to a protection circuit of a laser therapeutic instrument and the laser therapeutic instrument. The protection circuit comprises at least one state detection module, a logic module and a control module, the input end of the state detection module is connected with a laser therapeutic instrument peripheral key state signal, the output end of the state detection module is connected to the first input end of the logic module, the second input end of the logic module is connected with a laser therapeutic instrument master control signal, and the output end of the logic module is connected to the input end of the control module. The output end of the control module provides power for the optical shutter of the laser therapeutic instrument. The existing software is replaced by the hardware circuit design, the laser output state is rapidly controlled, the logic calculation time is shortened, the use experience of a user is ensured, and the safety of laser output is improved.

Description

Technical Field

[0001] The present invention relates to the field of laser therapy, and in particular to a protection circuit of a laser therapy apparatus and the laser therapy apparatus. Background Art

[0002] In recent years, with the rapid development of science and technology, the performance of lasers has been continuously improved, the quality of beams has also been greatly improved, and the power output has also become more stable. By designing a good external drive circuit, the laser can meet medical requirements very well. Therefore, lasers have shown great development space in medical applications, and high-power lasers have gradually developed into an indispensable laser light source equipment in laser medical devices. Currently, common laser therapeutic devices, including carbon dioxide laser therapeutic devices, thulium-doped fiber lasers, holmium laser therapeutic devices, etc., are used in many medical fields such as oral and urological diseases. Therefore, the safety research and development of laser output for users has become an important task.

[0003] At present, laser therapy devices generally use peripherals such as foot pedals and hand tools to control laser output. The main control detects the button status of the foot pedal or hand tool in real time and controls the output or stop of the laser through software algorithms. However, in most cases, due to the complexity of software logic calculations, very short delays often occur, resulting in a short time delay when the foot pedal or hand tool switches the laser output state, which seriously affects the user experience and poses a safety hazard. Summary of the invention

[0004] The object of the present invention is to provide a protection circuit for a laser therapeutic apparatus and a laser therapeutic apparatus, so as to solve the problem of time delay in switching the laser output state of the current laser therapeutic apparatus.

[0005] An embodiment of the present invention provides a protection circuit for a laser therapy device, the protection circuit comprising: at least one state detection module, a logic module and a control module; the input end of the state detection module is connected to the state signal of a button of a laser therapy device peripheral, the output ends of the state detection modules are all connected to the first input end of the logic module, the second input end of the logic module is connected to the main control signal of the laser therapy device, the output end of the logic module is connected to the input end of the control module, and the output end of the control module provides power for the laser therapy device shutter; wherein the number of the state detection modules is consistent with the number of the first input ends of the logic modules, and the output end of each of the state detection modules corresponds one-to-one to each of the first input ends of the logic modules; The logic module includes at least one first NOT gate, at least one AND gate, an OR gate and a second NOT gate; wherein the number of the first NOT gates and the number of the AND gates are consistent with the number of the state detection modules, and each of the first NOT gates corresponds to each of the first input terminals of the logic module one by one; the first end of the first NOT gate is connected to the first input terminal of the logic module, the second end of the first NOT gate is connected to the first end of the AND gate, the first end of each of the AND gates is also connected to the second input terminal of the logic module, the second end of each of the AND gates is connected to the first end of the OR gate, the second end of the OR gate is connected to the first end of the second NOT gate, and the second end of the second NOT gate is connected to the output terminal of the logic module; The status detection module is used to detect the status of the laser therapy instrument peripheral buttons in real time, and transmit the laser therapy instrument peripheral button status signal to the logic module after filtering; the logic module is used to receive the filtered laser therapy instrument peripheral button status signal and the laser therapy instrument main control signal and perform logical judgment, and output a control signal to the control module; the control module is used to control the opening and closing of the laser therapy instrument light gate according to the control signal.

[0006] Optionally, the status detection module includes a transistor output optocoupler and a pull-up resistor; the positive electrode of the light-emitting diode at the input end of the transistor output optocoupler is connected to the working voltage, the negative electrode of the light-emitting diode at the input end of the transistor output optocoupler is connected to the input end of the status detection module, the first end of the pull-up resistor is connected to the working voltage, the second end of the pull-up resistor is connected to the collector of the phototransistor at the output end of the transistor output optocoupler, the collector of the phototransistor at the output end of the transistor output optocoupler is connected to the output end of the status detection module, and the emitter of the phototransistor at the output end of the transistor output optocoupler is grounded.

[0007] Optionally, the status detection module also includes a diode, a current limiting resistor and a capacitor; the first end of the diode is connected to the power supply voltage, and the second end of the diode is connected to the first end of the current limiting resistor; the second end of the current limiting resistor is connected to the positive electrode of the light-emitting diode at the input end of the transistor output optocoupler; the first end of the capacitor is connected to the positive electrode of the light-emitting diode at the input end of the transistor output optocoupler, and the second end of the capacitor is connected to the negative electrode of the light-emitting diode at the input end of the transistor output optocoupler.

[0008] Optionally, the control module includes a solid-state relay and a light gate motor; the positive pole of the light-emitting diode at the input end of the solid-state relay is connected to the working voltage, the negative pole of the light-emitting diode at the input end of the solid-state relay is connected to the input end of the control module, the first drain and the second drain of the power field effect transistor at the output end of the solid-state relay are both connected to the working voltage, the source of the power field effect transistor at the output end of the solid-state relay is connected to the positive pole of the light gate motor, and the negative pole of the light gate motor is grounded.

[0009] Optionally, the control module also includes a first current limiting resistor and a second current limiting resistor; the first end of the first current limiting resistor is connected to the working voltage, the first drain and the second drain of the power field effect transistor at the output end of the solid-state relay are both connected to the second end of the first current limiting resistor, the first end of the second current limiting resistor is connected to the working voltage, and the second end of the second current limiting resistor is connected to the positive electrode of the light-emitting diode at the input end of the solid-state relay.

[0010] Optionally, when the external button status signal of the laser therapy instrument is at a low level, the light emitting diode at the input end of the transistor output optocoupler is turned on, the collector and emitter of the phototransistor at the output end of the transistor output optocoupler are turned on, and the status detection module outputs a low level; when the external button status signal of the laser therapy instrument is at a high level, the light emitting diode at the input end of the transistor output optocoupler is not turned on, the collector and emitter of the phototransistor at the output end of the transistor output optocoupler are not turned on, and the status detection module outputs a high level.

[0011] Optionally, when the main control signal of the laser therapy instrument is at a high level and the output end of at least one of the status detection modules is at a low level, at least one of the first NOT gates outputs a high level, at least one of the AND gates outputs a high level, the OR gate outputs a high level, the second NOT gate outputs a low level, and the logic module outputs a low level; when the main control signal of the laser therapy instrument is at a high level and the output ends of each of the status detection modules are at a high level, each of the first NOT gates outputs a low level, each of the AND gates outputs a low level, the OR gate outputs a low level, the second NOT gate outputs a high level, and the logic module outputs a high level; when the main control signal of the laser therapy instrument is at a low level, each of the AND gates outputs a low level, the OR gate outputs a low level, the second NOT gate outputs a high level, and the logic module outputs a high level.

[0012] Optionally, when the output end of the logic module is at a low level, the light emitting diode at the input end of the solid-state relay is turned on, the source and drain of the power field effect transistor at the output end of the solid-state relay are turned on, the light gate motor is powered on, and the light gate of the laser therapy device is opened; when the output end of the logic module is at a high level, the light emitting diode at the input end of the solid-state relay is not turned on, the source and drain of the power field effect transistor at the output end of the solid-state relay are not turned on, the light gate motor is not powered on, and the light gate of the laser therapy device is closed.

[0013] The protective circuit of the laser therapeutic apparatus provided by the embodiment of the present invention has the following beneficial effects: The protection circuit of the laser therapeutic instrument includes at least one state detection module, a logic module and a control module, and the state detection module, the logic module and the control module are connected to form the protection circuit of the laser therapeutic instrument. Among them, the state detection module can detect the state of the laser therapeutic instrument peripheral button in real time, and transmit the laser therapeutic instrument peripheral button state signal to the logic module after filtering; the logic module can receive the filtered laser therapeutic instrument peripheral button state signal and the laser therapeutic instrument main control signal and perform logical judgment, and output the control signal to the control module; the control module can control the opening and closing of the laser therapeutic instrument shutter according to the control signal. In addition, the specific logic judgment design of the logic module can ensure that the logic module correctly processes the state signal of at least one laser therapeutic instrument peripheral button, outputs the correct control signal, and improves the safety and reliability of laser output. The embodiment of the present invention uses the hardware circuit design to replace the existing software, quickly controls the laser output state, shortens the logic calculation time, ensures the user experience, and improves the safety of laser output.

[0014] An embodiment of the present invention provides a laser therapeutic apparatus, which includes the protection circuit of the laser therapeutic apparatus.

[0015] The laser therapy device provided by the embodiment of the present invention has the following beneficial effects: This laser therapeutic device has all the same advantages as the protection circuit of the above-mentioned laser therapeutic device, can shorten the logic calculation time, and realize the rapid switching of the laser output state. To avoid repetition, it will not be described here.

[0016] Optionally, the laser therapy device further includes a laser, a laser therapy device peripheral button and a laser therapy device shutter.

[0017] In the embodiment of the present invention, the laser therapy device shutter is controlled to open and close by the laser therapy device peripheral button, so as to switch the laser output state of the laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a protection circuit structure of a laser therapeutic apparatus provided by an embodiment of the present invention; Figure 2 is a circuit diagram of a state detection module according to an embodiment of the present invention; Figure 3 is a circuit diagram of a logic module according to an embodiment of the present invention; Figure 4 FIG. 4 is a circuit diagram of a control module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] An embodiment of the present invention provides a protection circuit for a laser therapy device, which includes: at least one state detection module, a logic module and a control module; the input end of the above-mentioned state detection module is connected to the peripheral button state signal of the laser therapy device, the output ends of the above-mentioned state detection modules are all connected to the first input end of the above-mentioned logic module, the second input end of the above-mentioned logic module is connected to the main control signal of the laser therapy device, the output end of the above-mentioned logic module is connected to the input end of the above-mentioned control module, and the output end of the above-mentioned control module provides power for the laser therapy device light shutter; wherein, the number of the above-mentioned state detection modules is consistent with the number of the first input ends of the above-mentioned logic modules, and the output end of each of the above-mentioned state detection modules corresponds one-to-one to each of the first input ends of the above-mentioned logic modules.

[0022] The above-mentioned logic module includes at least one first NOT gate, at least one AND gate, an OR gate and a second NOT gate; wherein, the number of the above-mentioned first NOT gates and the number of the above-mentioned AND gates are consistent with the number of the above-mentioned state detection modules, and each of the above-mentioned first NOT gates corresponds to each of the first input terminals of the above-mentioned logic module one by one; the first end of the above-mentioned first NOT gate is connected to the first input terminal of the above-mentioned logic module, the second end of the above-mentioned first NOT gate is connected to the first end of the above-mentioned AND gate, the first end of each of the above-mentioned AND gates is also connected to the second input terminal of the above-mentioned logic module, the second end of each of the above-mentioned AND gates is connected to the first end of the above-mentioned OR gate, the second end of the above-mentioned OR gate is connected to the first end of the above-mentioned second NOT gate, and the second end of the above-mentioned second NOT gate is connected to the output terminal of the above-mentioned logic module.

[0023] It should be noted that the first end of the above-mentioned AND gate includes two input ends, which respectively receive the output signal of the corresponding first NOT gate and the main control signal of the laser therapy device; the first end of the above-mentioned OR gate includes at least one input end, the number of which is the same as the number of the above-mentioned AND gates, and corresponds one-to-one to the output ends of each of the above-mentioned AND gates.

[0024] The above-mentioned status detection module is used to detect the status of the laser therapy instrument peripheral buttons in real time, and transmit the above-mentioned laser therapy instrument peripheral button status signal to the above-mentioned logic module after filtering; the above-mentioned logic module is used to receive the filtered laser therapy instrument peripheral button status signal and the laser therapy instrument main control signal and perform logical judgment, and output a control signal to the control module; the control module is used to control the opening and closing of the laser therapy instrument light gate according to the above-mentioned control signal.

[0025] In an embodiment of the present invention, the protection circuit of the laser therapeutic apparatus includes at least one state detection module, a logic module and a control module, and the state detection module, the logic module and the control module are connected to form the protection circuit of the laser therapeutic apparatus. Among them, the state detection module can detect the state of the laser therapeutic apparatus peripheral key in real time, and transmit the laser therapeutic apparatus peripheral key state signal to the logic module after filtering; the logic module can receive the filtered laser therapeutic apparatus peripheral key state signal and the laser therapeutic apparatus main control signal and perform logical judgment, and output the control signal to the control module; the control module can control the opening and closing of the laser therapeutic apparatus shutter according to the control signal. In addition, the logic module uses at least one first NOT gate, at least one AND gate, an OR gate and a second NOT gate to construct a correct logic calculation method, which can ensure that the logic module correctly processes one or more laser therapeutic apparatus peripheral key state signals, outputs the correct control signal, and improves the safety and reliability of laser output. The embodiment of the present invention uses the above hardware circuit design to replace the existing software, quickly controls the laser output state, shortens the logic calculation time, ensures the user experience, and improves the safety of laser output.

[0026] Optionally, the state detection module includes a transistor output optocoupler and a pull-up resistor; the positive electrode of the light-emitting diode at the input end of the transistor output optocoupler is connected to the working voltage, the negative electrode of the light-emitting diode at the input end of the transistor output optocoupler is connected to the input end of the state detection module, the first end of the pull-up resistor is connected to the working voltage, the second end of the pull-up resistor is connected to the collector of the phototransistor at the output end of the transistor output optocoupler, the collector of the phototransistor at the output end of the transistor output optocoupler is connected to the output end of the state detection module, and the emitter of the phototransistor at the output end of the transistor output optocoupler is grounded.

[0027] In the embodiment of the present invention, by setting a transistor output optocoupler and a pull-up resistor, the potential of the laser therapy instrument peripheral key status signal is readjusted to ensure that the laser therapy instrument peripheral key status signal processed by the status detection module can be correctly identified by the logic module.

[0028] Optionally, the above-mentioned status detection module also includes a diode, a current limiting resistor and a capacitor; the first end of the above-mentioned diode is connected to the power supply voltage, and the second end of the above-mentioned diode is connected to the first end of the above-mentioned current limiting resistor; the second end of the above-mentioned current limiting resistor is connected to the positive electrode of the light-emitting diode at the input end of the above-mentioned transistor output optocoupler; the first end of the above-mentioned capacitor is connected to the positive electrode of the light-emitting diode at the input end of the above-mentioned transistor output optocoupler, and the second end of the above-mentioned capacitor is connected to the negative electrode of the light-emitting diode at the input end of the above-mentioned transistor output optocoupler.

[0029] In the embodiment of the present invention, the diode acts as a protection circuit, and the current limiting resistor and capacitor form a filter circuit.

[0030] Optionally, the control module includes a solid-state relay and a light gate motor; the positive pole of the light-emitting diode at the input end of the solid-state relay is connected to the working voltage, the negative pole of the light-emitting diode at the input end of the solid-state relay is connected to the input end of the control module, the first drain and the second drain of the power field effect transistor (MOSFET) at the output end of the solid-state relay are both connected to the working voltage, the source of the power field effect transistor at the output end of the solid-state relay is connected to the positive pole of the light gate motor, and the negative pole of the light gate motor is grounded.

[0031] In the embodiment of the present invention, the control module receives the control signal to control the opening and closing of the solid-state relay, thereby controlling the power-on state of the photogate motor.

[0032] Optionally, the control module further includes a first current limiting resistor and a second current limiting resistor; the first end of the first current limiting resistor is connected to the working voltage, the first drain and the second drain of the power field effect transistor at the output end of the solid-state relay are both connected to the second end of the first current limiting resistor, the first end of the second current limiting resistor is connected to the working voltage, and the second end of the second current limiting resistor is connected to the positive electrode of the light-emitting diode at the input end of the solid-state relay.

[0033] In the embodiment of the present invention, both the first current limiting resistor and the second current limiting resistor play a role in protecting the circuit by limiting current.

[0034] Optionally, when the above-mentioned laser therapy instrument peripheral button status signal is at a low level, the light emitting diode at the input end of the above-mentioned transistor output optocoupler is turned on, the collector and emitter of the phototransistor at the output end of the above-mentioned transistor output optocoupler are turned on, and the above-mentioned status detection module outputs a low level; when the above-mentioned laser therapy instrument peripheral button status signal is at a high level, the light emitting diode at the input end of the above-mentioned transistor output optocoupler is not turned on, the collector and emitter of the phototransistor at the output end of the above-mentioned transistor output optocoupler are not turned on, and the above-mentioned status detection module outputs a high level.

[0035] In an embodiment of the present invention, the state detection module is used for when the laser therapy instrument peripheral key is pressed, the corresponding laser therapy instrument peripheral key state signal is low level, so that the light emitting diode at the input end of the transistor output optocoupler is turned on, and then the collector and emitter of the phototransistor at the output end of the transistor output optocoupler are turned on, and finally the state detection module outputs a low level; the state detection module is also used for when the laser therapy instrument peripheral key is not pressed, the corresponding laser therapy instrument peripheral key state signal is high level, so that the light emitting diode at the input end of the transistor output optocoupler is not turned on, and then the collector and emitter of the phototransistor at the output end of the transistor output optocoupler are not turned on, and finally the state detection module outputs a high level. The processing of the laser therapy instrument peripheral key state signal is realized so that it can be correctly identified by the logic module.

[0036] Optionally, when the main control signal of the laser therapy instrument is at a high level and the output end of at least one of the state detection modules is at a low level, at least one of the first NOT gates outputs a high level, at least one of the AND gates outputs a high level, the OR gate outputs a high level, the second NOT gate outputs a low level, and the logic module outputs a low level; when the main control signal of the laser therapy instrument is at a high level and the output ends of each of the state detection modules are at a high level, each of the first NOT gates outputs a low level, each of the AND gates outputs a low level, the OR gates output a low level, the second NOT gate outputs a high level, and the logic module outputs a high level; when the main control signal of the laser therapy instrument is at a low level, each of the AND gates outputs a low level, the OR gates output a low level, the second NOT gate outputs a high level, and the logic module outputs a high level.

[0037] In an embodiment of the present invention, the above-mentioned logic module is used for when the laser therapy device main control is started and at least one laser therapy device peripheral button is pressed, the corresponding laser therapy device main control signal is high level and the output end of at least one state detection module is low level, so that at least one first NOT gate outputs high level, and then at least one AND gate outputs high level, so that the OR gate outputs high level, and then the second NOT gate outputs low level, and finally the logic module outputs low level; the above-mentioned logic module is also used for when the laser therapy device main control is started and none of the laser therapy device peripheral buttons are pressed, the corresponding laser therapy device main control signal is high level and the output ends of each state detection module are high level connected to the first input end of the logic module, so that each first NOT gate outputs low level, and then each AND gate outputs low level, so that the OR gate outputs low level, and then the second NOT gate outputs high level, and finally the logic module outputs high level; the above-mentioned logic module is also used for when the laser therapy device main control is not started, the corresponding laser therapy device main control signal is low level, so that each AND gate outputs low level, so that the OR gate outputs low level, and then the second NOT gate outputs high level, and finally the logic module outputs high level. The logic module can output the correct control signal according to the main control state of the laser therapy device and the state of the peripheral buttons of the laser therapy device.

[0038] Optionally, when the output end of the above-mentioned logic module is at a low level, the light-emitting diode at the input end of the above-mentioned solid-state relay is turned on, the source and drain of the power field effect tube at the output end of the above-mentioned solid-state relay are turned on, the light gate motor is powered on, and the light gate of the above-mentioned laser therapy instrument is opened; when the output end of the above-mentioned logic module is at a high level, the light-emitting diode at the input end of the above-mentioned solid-state relay is not turned on, the source and drain of the power field effect tube at the output end of the solid-state relay are not turned on, the light gate motor is not powered on, and the light gate of the above-mentioned laser therapy instrument is closed.

[0039] In an embodiment of the present invention, the control module is used for when the laser therapy instrument main control is started and at least one laser therapy instrument peripheral button is pressed, the output end of the corresponding logic module is low level, so that the input end light emitting diode of the solid-state relay is turned on, and then the source and drain of the power field effect tube of the output end of the solid-state relay are turned on, so as to control the light gate motor to be powered on, and finally the laser therapy instrument light gate is opened; the control module is also used for when the laser therapy instrument main control is started and none of the laser therapy instrument peripheral buttons are pressed and when the laser therapy instrument main control is not started, the output end of the corresponding logic module is high level and connected to the input end of the control module, so that the input end light emitting diode of the solid-state relay is not turned on, and then the source and drain of the power field effect tube of the output end of the solid-state relay are not turned on, so as to control the light gate motor not to be powered on, and finally the laser therapy instrument light gate is closed. The control module can accurately control the opening and closing of the laser therapy instrument light gate according to the control signal.

[0040] An embodiment of the present invention provides a laser therapeutic apparatus, which includes the protection circuit of the laser therapeutic apparatus.

[0041] In the embodiment of the present invention, the laser therapeutic apparatus has all the same advantages as the protection circuit of the above-mentioned laser therapeutic apparatus, and can realize rapid switching of the laser output state. To avoid repetition, it will not be described here.

[0042] Optionally, the above-mentioned laser therapy device also includes a laser, a laser therapy device peripheral button and a laser therapy device shutter.

[0043] In the embodiment of the present invention, the laser therapy device shutter is controlled to open and close by the laser therapy device peripheral button, so as to switch the laser output state of the laser.

[0044] The protection circuit of the laser therapy device provided in the embodiment of the present invention can switch the laser output state after the user controls the peripheral state switching of the laser therapy device without waiting for the main control software of the laser therapy device to perform signal judgment and processing on the peripheral state, thereby shortening the delay time of controlling the switching of the laser output state. In addition, the real-time performance of controlling the opening and closing of the laser therapy device's light gate is improved, thereby ensuring the user experience and improving the safety of the laser output of the laser.

[0045] The embodiment of the present invention provides a specific protection circuit of a laser therapeutic apparatus, see Figure 1 Schematic diagram of the protection circuit structure of the laser therapeutic apparatus shown in the figure; in the embodiment of the present invention, the protection circuit of the laser therapeutic apparatus is used to shorten the signal processing delay time of the laser therapeutic apparatus main control software, improve the safety of the product, and enable the laser therapeutic apparatus to timely and accurately control the laser output mode and the laser output waveform and power, thereby achieving a therapeutic effect on the patient. Specifically, the protection circuit of the laser therapeutic apparatus includes a state detection module 110, a logic module 120 and a control module 130.

[0046] In the embodiments of the present invention, see further Figure 2 The circuit diagram of the state detection module shown is as follows; the state detection module 110 is composed of a transistor output optocoupler U101, a current limiting resistor R101, a capacitor C101, a diode D101 and a pull-up resistor R111.

[0047] The internal circuit connection relationship of the above-mentioned status detection module 110 is as follows: one end of the diode D101 is connected to the power supply voltage Vcc, the other end of the diode D101 is connected to one end of the current limiting resistor R101, the other end of the current limiting resistor R101 is simultaneously connected to one end of the capacitor C101 and the positive electrode of the light emitting diode at the input end of the transistor output optocoupler U101, the negative electrode of the light emitting diode at the input end of the transistor output optocoupler U101 is simultaneously connected to the other end of the capacitor C101 and the laser therapy instrument peripheral button, the collector of the output end phototransistor of the transistor output optocoupler U101 is simultaneously connected to the status signal output end P_STATE_1 and one end of the pull-up resistor R111, the other end of the pull-up resistor R111 is connected to the operating voltage Vee, and the emitter of the output end phototransistor of the transistor output optocoupler U101 is grounded; wherein, the laser therapy instrument peripheral button can output the laser therapy instrument peripheral button status signal.

[0048] The working principle of the above-mentioned state detection module 110 is as follows: when the laser therapy instrument peripheral button is pressed, the laser therapy instrument peripheral button status signal is low-level and connected to the input end of the state detection module 110, so that the input end light emitting diode of the transistor output optocoupler U101 is turned on, and then the collector and emitter of the phototransistor at the output end of the transistor output optocoupler U101 are turned on, and finally the state signal output end P_STATE_1 is low-level, that is, the output end of the above-mentioned state detection module 110 is low-level; when the laser therapy instrument peripheral button is not pressed, the laser therapy instrument peripheral button status signal is high-level and connected to the input end of the state detection module 110, so that the input end light emitting diode of the transistor output optocoupler U101 is not turned on, and then the collector and emitter of the phototransistor at the output end of the transistor output optocoupler U101 are not turned on, and finally the state signal output end P_STATE_1 is high-level, that is, the output end of the above-mentioned state detection module 110 is high-level.

[0049] Among them, the working voltage Vcc supplies power to the light-emitting diode at the input end of the transistor output optocoupler U101; the diode D101 plays a reverse protection role when the voltage of the laser therapy instrument peripheral button status signal is greater than the power supply voltage Vcc; the current limiting resistor R101 plays a current limiting role, limiting the conduction current of the light-emitting diode at the input end of the transistor output optocoupler U101 to prevent the transistor output optocoupler U101 from burning out; the current limiting resistor R101 and the capacitor C101 form an RC filter circuit, which plays a debouncing role on the laser therapy instrument peripheral button status signal; the pull-up resistor R111 ensures that the status signal output terminal P_STATE_1 is at a high level when the laser therapy instrument peripheral button is not pressed, and the status signal output terminal P_STATE_1 is at a low level when the laser therapy instrument peripheral button is pressed.

[0050] It should be noted that the state detection module 110 is composed of a plurality of similar detection circuits. The embodiment of the present invention describes one of the detection circuits in detail, and the other multiple detection circuits can be deduced similarly. Figure 2 shown.

[0051] In the embodiments of the present invention, see further Figure 3 The circuit diagram of the logic module shown is as follows; the logic module 120 may be composed of a NOT gate U211, an AND gate U221, an OR gate U231 and a NOT gate U241.

[0052] The internal circuit connection relationship of the above-mentioned logic module 120 is as follows: the input end of the NOT gate U211 is connected to the state signal output end P_STATE_1, the output end of the NOT gate U211 is connected to one of the input ends of the AND gate U221, the other input end of the AND gate U221 is connected to the control enable signal output end Out_EN of the laser therapy device main control, the output end of the AND gate U221 is connected to one of the input ends of the OR gate U231, the output end of the OR gate U231 is connected to the input end of the NOT gate U241, the output end of the NOT gate U241 is connected to the control signal output end Shutter_CTL of the logic module 120, and the control signal output end Shutter_CTL is connected to the control module 130.

[0053] The working principle of the above-mentioned logic module 120 is as follows: when the laser therapy device main control is started and the laser therapy device peripheral button is pressed, the control enable signal output terminal Out_EN of the laser therapy device main control is high level, and the state signal output terminal P_STATE_1 is low level, so that the NOT gate U211 outputs a high level, and then the AND gate U221 outputs a high level, so that the OR gate U231 outputs a high level, and then the NOT gate U241 outputs a low level, and finally the control signal output terminal Shutter_CTL is low level; when the laser therapy device main control is started and the laser therapy device peripheral button is not pressed, the control enable signal output terminal Out_EN of the laser therapy device main control is high level, and the state signal output terminal P_STATE_1 is high level, so that the NOT gate U211 outputs a low level, and then the AND gate U221 outputs a low level, so that the OR gate U231 outputs a low level, and then the NOT gate U241 outputs a high level, and finally the control signal output terminal Shutter_CTL is low level. TL is a high level; when the laser therapy device main control is not started and the laser therapy device peripheral button is pressed, the control enable signal output terminal Out_EN of the laser therapy device main control is a low level, and the state signal output terminal P_STATE_1 is a low level, so that the NOT gate U211 outputs a high level, and then the AND gate U221 outputs a low level, so that the OR gate U231 outputs a low level, and then the NOT gate U241 outputs a high level, and finally the control signal output terminal Shutter_CTL is a high level; when the laser therapy device main control is not started and the laser therapy device peripheral button is not pressed, the control enable signal output terminal Out_EN of the laser therapy device main control is a low level, and the state signal output terminal P_STATE_1 is a high level, so that the NOT gate U211 outputs a low level, and then the AND gate U221 outputs a low level, so that the OR gate U231 outputs a low level, and then the NOT gate U241 outputs a high level, and finally the control signal output terminal Shutter_CTL is a high level.

[0054] Among them, the control enable signal output terminal Out_EN of the laser therapy device main control is at a high level when the laser therapy device main control is started, and is at a low level when the laser therapy device main control is not started. When the laser therapy device's main control is started, when laser output is required, the user controls the peripheral button to be pressed, and the status signal output terminal P_STATE_1 is low level, which is converted to high level after passing through the NOT gate U211, and the high level of the control enable signal output terminal Out_EN of the laser therapy device's main control is converted to high level after passing through the AND gate U221, and then converted to high level after passing through the OR gate U231, and then converted to low level after passing through the NOT gate U241, which plays a role in timely controlling the opening of the laser therapy device's light gate; when the laser therapy device's main control is started, when the laser output needs to be stopped, the user releases the peripheral button, and the status signal output terminal P_STATE_1 is high level, which is converted to low level after passing through the NOT gate U211, and the high level of the control enable signal output terminal Out_EN of the laser therapy device's main control is converted to low level after passing through the AND gate U221, and then converted to low level after passing through the OR gate U231, and then converted to high level after passing through the NOT gate U241, which plays a role in timely controlling the closing of the light gate. When the laser therapy device main control is not started, no matter whether the status signal output terminal P_STATE_1 is at a low level or a high level, the output of AND gate U221 will only be at a low level, which will be converted to a low level after passing through OR gate U231, and then converted to a high level after passing through NOT gate U241.

[0055] In addition, in order to receive more status signals of buttons of laser therapy device peripherals, the logic module 120 may also be provided with NOT gates U212, ···, NOT gate U21N, and AND gates U222, ···, AND gate U22N; thereby, the logic module 120 includes a circuit of a plurality of similar status signal output terminals P_STATE constructed by a plurality of NOT gates and a plurality of AND gates, which are inversely ANDed with the control enable signal output terminal Out_EN of the laser therapy device main control, and can respectively detect the status of multiple different peripheral buttons, so as to realize the control of the opening and closing of the laser therapy device light gate by different laser therapy device peripheral buttons.

[0056] Specifically, when the laser therapy device main control is started and at least one laser therapy device peripheral button is pressed, the control enable signal output terminal Out_EN of the laser therapy device main control is high and at least one state signal output terminal P_STATE_1 is low, so that at least one of the NOT gates U211, U212, ..., and U21N outputs a high level, and then at least one of the AND gates U221, U222, ..., and U22N outputs a high level, so that the OR gate U231 outputs a high level, and then the NOT gate U241 outputs a low level, and finally the control signal output terminal Shutter_CTL is low, that is, the output terminal of the logic module 120 is low, and this low level is the control signal for opening the laser therapy device shutter; when the laser therapy device main control is started and none of the laser therapy device peripheral buttons are pressed, the control enable signal output terminal Out_EN of the laser therapy device main control is high and each state signal output terminal P_STATE_1 is high, so that The NOT gates U211, U212, ..., and U21N all output low levels, which in turn make the AND gates U221, U222, ..., and U22N all output low levels, so that the OR gate U231 outputs a low level, which in turn makes the NOT gate U241 output a high level, and finally makes the control signal output terminal Shutter_CTL a high level, that is, the output terminal of the logic module 120 is a high level, and this high level is the control signal for closing the shutter of the laser therapy device; in the laser therapy When the main control of the laser therapy device is not started, the control enable signal output terminal Out_EN of the main control of the laser therapy device is at a low level, so that the AND gates U221, U222, ..., and U22N all output low levels, so that the OR gate U231 outputs a low level, and then the NOT gate U241 outputs a high level, and finally the control signal output terminal Shutter_CTL is at a high level, that is, the output terminal of the logic module 120 is at a high level, and this high level is the control signal for closing the shutter of the laser therapy device.

[0057] In the embodiments of the present invention, see further Figure 4 As shown in the circuit diagram of the control module, the control module 130 is composed of a current limiting resistor R301, a solid-state relay U301, a current limiting resistor R302, and a light shutter motor M301.

[0058] The internal circuit connection relationship of the above-mentioned control module 130 is as follows: one end of the current limiting resistor R301 is connected to the working voltage Vcc, the other end of the current limiting resistor R301 is connected to the positive electrode of the light-emitting diode at the input end of the solid-state relay U301, the negative electrode of the light-emitting diode at the input end of the solid-state relay U301 is connected to the control signal output end Shutter_CTL of the logic module 120, one end of the current limiting resistor R302 is simultaneously connected to the two drains of the power field effect transistor at the output end of the solid-state relay U301, the other end of the current limiting resistor R302 is connected to the working voltage Vdd, the source of the power field effect transistor at the output end of the solid-state relay U301 is connected to the positive electrode of the light gate motor M301, and the negative electrode of the light gate motor M301 is grounded.

[0059] The working principle of the above-mentioned control module 130 is as follows: when the laser therapy device main control is started and at least one laser therapy device peripheral button is pressed, the control signal output terminal Shutter_CTL is at a low level, so that the input end light emitting diode of the solid-state relay U301 is turned on, and then the source and drain of the power field effect transistor at the output end of the solid-state relay U301 are turned on, so that the working voltage Vdd is limited by the current limiting resistor R302 to supply power to the shutter motor M301, and finally the laser therapy device shutter is opened; when the laser therapy device main control is started and none of the laser therapy device peripheral buttons are pressed and when the laser therapy device main control is not started, the control signal output terminal Shutter_CTL is at a high level, so that the input end light emitting diode of the solid-state relay U301 is not turned on, the source and drain of the power field effect transistor at the output end of the solid-state relay U301 are not turned on, the shutter motor M301 is not powered, and the shutter is closed.

[0060] Among them, the current limiting resistor R301 plays a current limiting role, limiting the conduction current of the light-emitting diode at the input end of the solid-state relay U301, preventing the solid-state relay U301 from being damaged by overcurrent; the current limiting resistor R302 plays a current limiting role, limiting the working current of the light gate motor M301, preventing the light gate motor M301 from being damaged by overcurrent; the light gate motor M301 controls the opening or closing of the light gate.

[0061] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the control device through a computer, and the program can be stored in a computer-readable storage medium. When the program is executed, it may include the processes of the above-mentioned method embodiments, wherein the storage medium may be a memory, a disk, an optical disk, etc.

[0062] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements. The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0063] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A protection circuit for a laser therapeutic apparatus, characterized in that: The protection circuit includes: at least one state detection module, a logic module and a control module; The input end of the state detection module is connected to the external button state signal of the laser therapy instrument, the output ends of the state detection modules are all connected to the first input end of the logic module, the second input end of the logic module is connected to the main control signal of the laser therapy instrument, the output end of the logic module is connected to the input end of the control module, and the output end of the control module provides power for the laser therapy instrument shutter; wherein the number of the state detection modules is consistent with the number of the first input ends of the logic modules, and the output ends of the state detection modules correspond one-to-one to the first input ends of the logic modules; The logic module includes at least one first NOT gate, at least one AND gate, an OR gate and a second NOT gate; wherein the number of the first NOT gates and the number of the AND gates are consistent with the number of the state detection modules, and each of the first NOT gates corresponds to each of the first input terminals of the logic module one by one; The first end of the first NOT gate is connected to the first input end of the logic module, the second end of the first NOT gate is connected to the first end of the AND gate, the first end of each AND gate is also connected to the second input end of the logic module, the second end of each AND gate is connected to the first end of the OR gate, the second end of the OR gate is connected to the first end of the second NOT gate, and the second end of the second NOT gate is connected to the output end of the logic module; The state detection module is used to detect the state of the laser therapy instrument peripheral key in real time, and transmit the laser therapy instrument peripheral key state signal to the logic module after filtering; The logic module is used to receive the filtered state signals of the peripheral buttons of the laser therapy instrument and the main control signal of the laser therapy instrument, perform logic judgment, and output a control signal to the control module; The control module is used to control the opening and closing of the laser therapy device shutter according to the control signal.

2. The protection circuit of the laser therapeutic apparatus according to claim 1, characterized in that: The state detection module includes a transistor output optocoupler and a pull-up resistor; The positive electrode of the light-emitting diode at the input end of the transistor output optocoupler is connected to the working voltage, the negative electrode of the light-emitting diode at the input end of the transistor output optocoupler is connected to the input end of the status detection module, the first end of the pull-up resistor is connected to the working voltage, the second end of the pull-up resistor is connected to the collector of the phototransistor at the output end of the transistor output optocoupler, the collector of the phototransistor at the output end of the transistor output optocoupler is connected to the output end of the status detection module, and the emitter of the phototransistor at the output end of the transistor output optocoupler is grounded.

3. The protection circuit of the laser therapeutic apparatus according to claim 2, characterized in that: The state detection module also includes a diode, a current limiting resistor and a capacitor; The first end of the diode is connected to the power supply voltage, and the second end of the diode is connected to the first end of the current limiting resistor; the second end of the current limiting resistor is connected to the positive electrode of the light-emitting diode at the input end of the transistor output optocoupler; the first end of the capacitor is connected to the positive electrode of the light-emitting diode at the input end of the transistor output optocoupler, and the second end of the capacitor is connected to the negative electrode of the light-emitting diode at the input end of the transistor output optocoupler.

4. The protection circuit of the laser therapeutic apparatus according to claim 1, characterized in that: The control module includes a solid-state relay and a light shutter motor; The positive pole of the light-emitting diode at the input end of the solid-state relay is connected to the working voltage, the negative pole of the light-emitting diode at the input end of the solid-state relay is connected to the input end of the control module, the first drain and the second drain of the power field effect transistor at the output end of the solid-state relay are both connected to the working voltage, the source of the power field effect transistor at the output end of the solid-state relay is connected to the positive pole of the light gate motor, and the negative pole of the light gate motor is grounded.

5. The protection circuit of the laser therapeutic apparatus according to claim 4, characterized in that: The control module also includes a first current limiting resistor and a second current limiting resistor; The first end of the first current limiting resistor is connected to the operating voltage, the first drain and the second drain of the power field effect transistor at the output end of the solid-state relay are both connected to the second end of the first current limiting resistor, the first end of the second current limiting resistor is connected to the operating voltage, and the second end of the second current limiting resistor is connected to the positive electrode of the light-emitting diode at the input end of the solid-state relay.

6. The protection circuit of the laser therapeutic apparatus according to claim 2, characterized in that: When the state signal of the button of the laser therapy instrument peripheral is at a low level, the light emitting diode at the input end of the transistor output optocoupler is turned on, the collector and emitter of the phototransistor at the output end of the transistor output optocoupler are turned on, and the state detection module outputs a low level; When the laser therapy instrument peripheral button status signal is at a high level, the light emitting diode at the input end of the transistor output optocoupler is not conducting, the collector and emitter of the phototransistor at the output end of the transistor output optocoupler are not conducting, and the status detection module outputs a high level.

7. The protection circuit of the laser therapeutic apparatus according to claim 1, characterized in that: When the main control signal of the laser therapy device is at a high level and the output end of at least one of the state detection modules is at a low level, at least one of the first NOT gates outputs a high level, at least one of the AND gates outputs a high level, the OR gate outputs a high level, the second NOT gate outputs a low level, and the logic module outputs a low level; When the main control signal of the laser therapy instrument is at a high level and the output ends of the state detection modules are all at a high level, each of the first NOT gates outputs a low level, each of the AND gates outputs a low level, the OR gate outputs a low level, the second NOT gate outputs a high level, and the logic module outputs a high level; When the main control signal of the laser therapeutic apparatus is at a low level, each of the AND gates outputs a low level, the OR gate outputs a low level, the second NOT gate outputs a high level, and the logic module outputs a high level.

8. The protection circuit of the laser therapeutic apparatus according to claim 4, characterized in that: When the output end of the logic module is at a low level, the light emitting diode at the input end of the solid-state relay is turned on, the source and drain of the power field effect transistor at the output end of the solid-state relay are turned on, the shutter motor is powered on, and the shutter of the laser therapy device is opened; When the output end of the logic module is at a high level, the light emitting diode at the input end of the solid-state relay is not conducting, the source and drain of the power field effect transistor at the output end of the solid-state relay are not conducting, the shutter motor is not powered on, and the shutter of the laser therapy device is closed.

9. A laser therapeutic apparatus, characterized in that: The laser therapeutic apparatus comprises the protection circuit of the laser therapeutic apparatus according to any one of claims 1-8.

10. The laser therapeutic apparatus according to claim 9, characterized in that: The laser therapeutic apparatus further comprises a laser, a laser therapeutic apparatus peripheral key and a laser therapeutic apparatus shutter.

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