Two-way power supply adaptive switching circuit, laser mainframe and laser treatment instrument

Abstract

The utility model provides a two-way power supply self -adaptation switching circuit, laser mainframe and laser therapeutic instrument, two-way power supply self -adaptation switching circuit includes: interface, first switch module, second switch module, voltage dividing circuit and NAND module, interface is used for accessing power voltage, voltage dividing circuit carries out voltage division to power voltage, and the voltage value after voltage division is output to NAND module, NAND module is used for outputting first instruction to first switch module and outputting second instruction to second switch module, first switch module is under the condition of receiving first instruction, and the passage between interface and first power end is conducted, second switch module is under the condition of receiving first instruction, and the passage between interface and second power end is conducted, the utility model carries out the distinction to the voltage after voltage division, and the corresponding combined instruction is output to two switch modules, and the passage between interface and the corresponding power end of the power voltage value of access is conducted, and the power end of output matching is adaptively switched according to power voltage.

Description

Technical Field

[0001] This utility model relates to the field of power switching circuit technology, and in particular to a two-way power adaptive switching circuit, a laser host, and a laser therapy device. Background Technology

[0002] Power switching circuits are typically used to adapt the input voltage to a suitable interface or circuit in order to match the voltage with the circuit's operating voltage.

[0003] In existing technologies, a controller typically switches the appropriate interface based on the detected input voltage value; however, this method relies on a voltage detection circuit and a controller for control, which consumes computational resources, is slow to respond, and may stop working due to software failures. Currently, there is a need for a purely hardware-based adaptive power switching circuit. Utility Model Content

[0004] The main purpose of this invention is to provide a two-way power adaptive switching circuit, a laser host, and a laser therapy device, aiming to provide a power adaptive switching circuit implemented purely in hardware.

[0005] To achieve the above objectives, this utility model proposes a two-way power supply adaptive switching circuit, which includes:

[0006] Interface, first switch module, second switch module, voltage divider circuit, NOT gate module;

[0007] The interfaces are respectively connected to the input terminals of the first switch module, the second switch module, and the voltage divider circuit; the output terminal of the first switch module is connected to the first power supply terminal, and the output terminal of the second switch module is connected to the second power supply terminal; the output terminal of the voltage divider circuit is connected to the input terminal of the NOT gate module; the output terminal of the NOT gate module is connected to the controlled terminal of the first switch module and the controlled terminal of the second switch module.

[0008] An interface is used to connect to a power supply voltage; a voltage divider circuit is used to divide the power supply voltage when it is connected to the interface, and output the divided voltage value to the NOT gate module; the NOT gate module is used to output a first command to the first switch module and a second command to the second switch module when the divided voltage value is greater than a preset threshold; the NOT gate module is also used to output a second command to the first switch module and a first command to the second switch module when the divided voltage value is less than a preset threshold.

[0009] The first switch module is used to connect the path between the interface and the first power supply terminal upon receiving a first instruction.

[0010] The second switch module is used to connect the interface and the second power supply terminal when the first instruction is received.

[0011] Optionally, the voltage divider circuit includes: a first impedance unit, a second impedance unit, and at least one Zener diode;

[0012] At least one Zener diode is connected in series in the same direction to form a first positive terminal and a first negative terminal;

[0013] The first end of the first impedance unit is connected to the interface, and the second end is connected to the first negative terminal of at least one Zener diode; the first positive terminal of at least one Zener diode is connected to the first end of the second impedance unit and the input terminal of the NOT gate module; the second end of the second impedance unit is grounded.

[0014] Optionally, the first impedance unit includes a first resistor; the second impedance unit includes a second resistor and a first capacitor.

[0015] The first end of the first resistor is connected to the interface, and the second end is connected to the first negative terminal; the first positive terminal is connected to the first end of the second resistor and the first end of the first capacitor; the second end of the second resistor is grounded.

[0016] Optionally, the NOT gate module includes: a first NOT gate and a second NOT gate;

[0017] The input of the first NOT gate is connected to the output of the voltage divider circuit, and the output is connected to the controlled terminal of the first switching module and the input of the second NOT gate; the output of the second NOT gate is connected to the controlled terminal of the second switching module.

[0018] Optionally, the first switching module includes: a first switching device, a second switching device, a third resistor, and a fourth resistor;

[0019] The interface connects the first terminal of the first switching device, the first terminal of the second switching device, and the first terminal of the third resistor; the first power supply terminal connects the second terminal of the first switching device and the second terminal of the second switching device; the second terminal of the third resistor connects the controlled terminal of the first switching device, the controlled terminal of the second switching device, and the first terminal of the fourth resistor; the second terminal of the fourth resistor connects to the output terminal of the first NOT gate.

[0020] Both the first and second switching devices are used to connect the interface and the first power supply terminal when a first instruction is received.

[0021] Optionally, the NOT gate module further includes: a first driving circuit and a second driving circuit;

[0022] The first end of the first driving circuit is connected to the controlled end of the first switching module, the second end is connected to the first voltage, and the controlled end is connected to the output end of the first NOT gate.

[0023] The first end of the second driving circuit is connected to the controlled end of the second switching module, the second end is connected to the second voltage, and the controlled end is connected to the output end of the second NOT gate.

[0024] The first driving circuit is used to turn on the path between the first switching module and the first voltage upon receiving a first instruction.

[0025] The second driving circuit is used to connect the first switching module and the second voltage when a second instruction is received.

[0026] Optionally, the second terminal of the first driving circuit is grounded; the second terminal of the second driving circuit is grounded.

[0027] The first driving circuit is used to connect the first switching module to ground upon receiving a first instruction.

[0028] The second driving circuit is used to connect the first switching module to ground upon receiving the second instruction.

[0029] Optionally, the two-power adaptive switching circuit further includes: a fifth switching device;

[0030] The first terminal of the fifth switching device is connected to the second terminal of the first driving circuit and the second terminal of the second driving circuit; the second terminal of the fifth switching device is grounded.

[0031] The fifth switching device is used to connect the second terminal of the first driving circuit and ground when the voltage at the controlled terminal of the fifth switching device is greater than the third set threshold.

[0032] This utility model also proposes a laser host, which includes two power supply adaptive switching circuits.

[0033] This utility model also proposes a laser therapy device, including a handle, an optical transmission module, and the laser host; the laser host is used to emit laser light and transmit it to the handle through the optical transmission module.

[0034] This invention proposes a two-way power supply adaptive switching circuit, comprising: an interface, a first switching module, a second switching module, a voltage divider circuit, and a NOT gate module; the interface is connected to the input terminals of the first switching module, the second switching module, and the voltage divider circuit; the output terminal of the first switching module is connected to a first power supply terminal, and the output terminal of the second switching module is connected to a second power supply terminal; the output terminal of the voltage divider circuit is connected to the input terminal of the NOT gate module; the output terminal of the NOT gate module is connected to the controlled terminals of the first and second switching modules; the interface is used to connect to the power supply voltage; the voltage divider circuit is used when the power supply voltage is connected to the interface. The power supply voltage is divided and the divided voltage value is output to the NOT gate module. The NOT gate module is used to output a first command to the first switch module and a second command to the second switch module when the divided voltage value is greater than a preset threshold. The NOT gate module is also used to output a second command to the first switch module and a first command to the second switch module when the divided voltage value is less than the preset threshold. The first switch module is used to connect the interface and the first power supply terminal when it receives the first command. The second switch module is used to connect the interface and the second power supply terminal when it receives the first command.

[0035] This invention divides the power supply voltage using a voltage divider circuit and uses a NOT gate module to distinguish the divided voltages, outputting corresponding combinations of commands to two switching modules. This enables the connection between the interface and the power supply terminal corresponding to the input power supply voltage value to be turned on, while the other connection is turned off. This achieves adaptive switching of the output power terminal to match the power supply voltage. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the first structure of the first embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0038] Figure 2 This is a second structural schematic diagram of the first embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0039] Figure 3 This is a schematic diagram of the third structure of the first embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0040] Figure 4 This is a schematic diagram of the first structure of the second embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0041] Figure 5 This is a schematic diagram of the second structure of the second embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0042] Figure 6 This is a schematic diagram of the first structure of the third embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0043] Figure 7 This is a schematic diagram of the second structure of the third embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0044] Figure 8 This is a schematic diagram of the first structure of the fourth embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0045] Figure 9 This is a schematic diagram of the second structure of the fourth embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0046] Figure 10 This is a schematic diagram of the third structure of the fourth embodiment of the two-way power supply adaptive switching circuit of this utility model;

[0047] Figure 11 This is a schematic diagram of the fifth embodiment of the two-way power supply adaptive switching circuit of this utility model.

[0048] Explanation of icon numbers:

[0049]

[0050] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0052] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0055] This utility model proposes a two-way power supply adaptive switching circuit. In the first embodiment, the two-way power supply adaptive switching circuit includes: interface 10, first switch module 30, second switch module 40, voltage divider circuit 20, and NOT gate module 50.

[0056] Interface 10 is connected to the input terminal of the first switch module 30, the input terminal of the second switch module 40, and the input terminal of the voltage divider circuit 20, respectively; the output terminal of the first switch module 30 is connected to the first power supply terminal, and the output terminal of the second switch module 40 is connected to the second power supply terminal; the output terminal of the voltage divider circuit 20 is connected to the input terminal of the NOT gate module 50; the output terminal of the NOT gate module 50 is connected to the controlled terminal of the first switch module 30 and the controlled terminal of the second switch module 40.

[0057] Interface 10 is used to connect to a power supply voltage; voltage divider circuit 20 is used to divide the power supply voltage when it is connected to interface 10, and output the divided voltage value to NOT gate module 50; NOT gate module 50 is used to output a first command to the first switch module 30 and a second command to the second switch module 40 when the divided voltage value is greater than a preset threshold; NOT gate module 50 is also used to output a second command to the first switch module 30 and a first command to the second switch module when the divided voltage value is less than a preset threshold.

[0058] The first switch module 30 is used to connect the path between the interface 10 and the first power supply terminal when a first instruction is received.

[0059] The second switch module 40 is used to connect the interface 10 and the second power supply terminal when a first instruction is received.

[0060] like Figure 1 As shown, interface 10 is connected to a power supply voltage; this invention does not limit the voltage value of the power supply. It should be noted that the two-way power supply adaptive switching circuit proposed in this invention allows interface 10 to be connected to either of the two power supplies. This two-way power supply adaptive switching circuit outputs the connected voltage value to either the first power supply terminal or the second power supply terminal based on the voltage amplitude at interface 10. The devices connected to the first and second power supply terminals are not limited in this invention. It is easy to understand that the voltage amplitudes of the two power supplies are matched to the first and second power supply terminals respectively. The first and second power supply terminals require different voltage values, and therefore the amplitudes of the connected power supply voltages are also different. The first power supply terminal can be used to connect to the first load, and the second power supply terminal can be used to connect to the second load; the operating voltage of the first load and the operating voltage of the second load are different; hereinafter, the voltage value required by the first power supply terminal is defined as the first power supply voltage value, and the voltage value required by the second power supply terminal is defined as the second power supply voltage value. For example, the first power supply voltage value corresponding to the first power supply terminal can be 24V, and the power supply voltage corresponding to the second power supply terminal can be 48V. When the power supply voltage connected to interface 10 is 24V, it should be output to the first power supply terminal. In this embodiment, the power supply voltage received at interface 10 is selectively output to either the first power supply terminal or the second power supply terminal. Specifically, when the first power supply voltage is received at interface 10, the first power supply voltage is output to the first power supply terminal; when the second power supply voltage is received at interface 10, the second power supply voltage is output to the second power supply terminal. It is important to note that the first power supply voltage and the second power supply voltage are not equal. Therefore, under normal operating conditions of the two-way power adaptive switching circuit, the first switch module 30 and the second switch module 40 cannot be simultaneously in a conducting or de-conducting state. When the first switch module 30 is in a conducting state, interface 10 is connected to the first power supply terminal. When the first switch module 30 is in a de-conducting state, interface 10 is disconnected from the first power supply terminal. The second switch module 40 is similar. Furthermore, when the first switch module 30 and the second switch module 40 are simultaneously in a conducting state, the power supply voltage will be output to a mismatched power supply terminal. When the first switch module 30 and the second switch module 40 are simultaneously in a de-conducting state, the power supply voltage cannot enter either power supply terminal. Adaptive switching between the two power supplies can only be achieved when one of the first switch module 30 and the second switch module 40 is in a conducting state and the other is in a closed state, and the connection interface 10 is connected to a power supply terminal matching the power supply voltage. It should be noted that this invention performs adaptive switching between the two power supplies but does not limit the specific voltage amplitudes of the two power supplies; developers can determine these amplitudes according to their needs. The voltage values ​​of the first and second power supplies are not equal.

[0061] In this embodiment, the voltage value at interface 10 is divided by a voltage divider circuit 20, and the divided voltage value is output to a NOT gate circuit. The NOT gate circuit outputs corresponding voltage values ​​to the first switch module 30 and the second switch module 40 based on the divided voltage value. Specifically, this embodiment compares the divided voltage value with a preset threshold and outputs the corresponding values ​​accordingly. It is easy to understand that the first power supply voltage value and the second power supply voltage value are not equal, and the voltage values ​​after being divided by the voltage divider circuit 20 are also different. Researchers can set appropriate preset threshold values ​​and voltage division coefficients of the voltage divider circuit 20 based on the first and second power supply voltage values ​​to ensure that the preset threshold value is between the divided voltage values ​​of the first and second power supply voltage values. Therefore, the amplitude of the power supply voltage connected to interface 10 can be determined according to the comparison result between the output voltage value of the voltage divider circuit 20 and the preset threshold value.

[0062] The NOT gate module 50 outputs different commands to the first switch module 30 and the second switch module 40 at the same time; that is, the voltage amplitude of the first command is different from the voltage amplitude of the second command. The NOT gate module 50 outputs the first command to one of the first switch module 30 and the second switch module 40, and outputs the second command to the other. The first switch module 30 and the second switch module 40 are used to turn on when the first command is received, and turn off otherwise. That is, the first switch module 30 and the second switch module 40 are used to turn off when the second command is received.

[0063] It is easy to understand that the first instruction meets the conduction conditions of the first switch module 30 and the second switch module 40; the second instruction meets the de-activation conditions of the first switch module 30 and the second switch module 40. In particular, the conduction conditions of the first switch module 30 and the second switch module 40 can be the same.

[0064] In one example, the first switch module 30 and the second switch module 40 are turned on under a high-level condition. Correspondingly, the voltage value of the first instruction is greater than the turn-on voltage values ​​of the first switch module 30 and the second switch module 40, and the first switch module 30 and the second switch module 40 are turned on under the action of the first instruction. The voltage value of the second instruction is less than the turn-on voltage values ​​of the first switch module 30 and the second switch module 40; the first switch module 30 and the second switch module 40 are turned off under the action of the second instruction. The first switch module 30 and the second switch module 40 may include NMOS transistors, thyristors, relays, or N-channel IGBTs, etc.

[0065] In another example, the first switch module 30 and the second switch module 40 are turned on under a low-level condition. Correspondingly, the voltage value of the first instruction is less than the turn-on voltage values ​​of the first switch module 30 and the second switch module 40, and the first switch module 30 and the second switch module 40 are turned on under the action of the first instruction. The voltage value of the second instruction is greater than the turn-on voltage values ​​of the first switch module 30 and the second switch module 40; the first switch module 30 and the second switch module 40 are turned off under the action of the second instruction. The first switch module 30 and the second switch module 40 may include PMOS transistors, PNP power transistors, relays, or P-channel IGBTs, etc.

[0066] The NOT gate module 50 determines the switching module corresponding to the first instruction based on the comparison between the output voltage value of the voltage divider circuit 20 and a preset threshold, turns on the switching module, and turns off the other switching module, thus achieving automatic switching.

[0067] It should be noted that even when no power supply is connected to interface 10, the voltage divider circuit 20 still divides the voltage at interface 10 and outputs the divided voltage value to the NOT gate module 50. In simpler terms, at this time, the voltage divider circuit 20 outputs zero voltage to the NOT gate module 50; the NOT gate module 50 outputs a second instruction to the first switch module 30 and a first instruction to the second switch module 40.

[0068] Furthermore, the NOT gate module 50 includes a NOT gate circuit; therefore, it is assumed that the first power supply voltage value is greater than the second power supply voltage value. The voltage value of the first power supply after voltage division is greater than the high-level threshold, and the voltage value of the second power supply after voltage division is less than the low-level threshold. A preset threshold can be set between the low-level threshold and the high-level threshold. The high-level threshold and the low-level threshold are used to determine whether the voltage at the input terminal of the NOT gate circuit is high or low.

[0069] In one example, such as Figure 2 As shown, the NOT gate module 50 includes a first NOT gate 510 and a second NOT gate 520.

[0070] The input terminal of the first NOT gate 510 is connected to the output terminal of the voltage divider circuit 20, and the output terminal is connected to the controlled terminal of the first switch module 30 and the input terminal of the second NOT gate 520; the output terminal of the second NOT gate 520 is connected to the controlled terminal of the second switch module 40.

[0071] Connecting the input of the second NOT gate 520 to the output of the first NOT gate 510 will result in the output voltage of the second NOT gate 520 being opposite to that of the first NOT gate 510; that is, one is high and the other is low.

[0072] Assuming the first power supply voltage, after voltage division, is greater than the high-level threshold of the first NOT gate 510, and the second power supply voltage, after voltage division, is less than the low-level threshold of the first NOT gate 510, then when the first power supply voltage is connected to interface 10, the first NOT gate 510 outputs a first command to the first switch module 30 and a second command to the second switch module 40, thus establishing a connection between interface 10 and the first power supply terminal, allowing the power supply voltage at interface 10 to be output to the first power supply terminal. Similarly, when the second power supply voltage is connected to interface 10, the first NOT gate 510 outputs a second command to the first switch module 30 and a first command to the second switch module 40, thus establishing a connection between interface 10 and the second power supply terminal, allowing the power supply voltage at interface 10 to be output to the second power supply terminal.

[0073] In this example, since the voltage value of the first power supply after voltage division is greater than a preset threshold and also greater than a high-level threshold, when the first power supply voltage is connected to interface 10, the voltage at the input of the first NOT gate 510 is high. Therefore, the first NOT gate 510 outputs a low-level voltage to the controlled terminal of the first switch module 30 and the input of the second NOT gate 520, and the second NOT gate 520 outputs a high-level voltage to the controlled terminal of the second switch module 40. It should be noted that in this example, the voltage values ​​at the controlled terminals of the first switch module 30 and the second switch module 40 are less than the corresponding turn-on voltage values, thus enabling conduction.

[0074] In another example, such as Figure 3 As shown, the NOT gate module 50 includes a first NOT gate 510 and a second NOT gate 520. The input terminal of the first NOT gate 510 is connected to the output terminal of the voltage divider circuit 20, and the output terminal is connected to the controlled terminal of the second switch module 40 and the input terminal of the second NOT gate 520; the output terminal of the second NOT gate 520 is connected to the controlled terminal of the first switch module 30.

[0075] It should be noted that in this example, the voltage values ​​at the controlled terminals of the first switch module 30 and the second switch module 40 are greater than the corresponding turn-on voltage values, thus enabling them to conduct. When the interface 10 is connected to the first power supply voltage value, the voltage at the input terminal of the first NOT gate 510 is high, and the first NOT gate 510 outputs a low level to the controlled terminal of the second switch module 40 and the input terminal of the second NOT gate 520. The second NOT gate 520 outputs a high level to the controlled terminal of the first switch module 30, thereby enabling the first switch module 30 to conduct and the second switch module 40 to turn off. Correspondingly, when the interface 10 is connected to the second power supply voltage value, the voltage at the input terminal of the first NOT gate 510 is low, and the first NOT gate 510 outputs a high level to the controlled terminal of the second switch module 40 and the input terminal of the second NOT gate 520. The second NOT gate 520 outputs a low level to the controlled terminal of the first switch module 30, thereby enabling the first switch module 30 to turn off and the second switch module 40 to conduct.

[0076] This utility model proposes a two-way power supply adaptive switching circuit, which includes: an interface 10, a first switch module 30, a second switch module 40, a voltage divider circuit 20, and a NOT gate module 50; the interface 10 is connected to the input terminals of the first switch module 30, the second switch module 40, and the voltage divider circuit 20 respectively; the output terminal of the first switch module 30 is connected to a first power supply terminal, and the output terminal of the second switch module 40 is connected to a second power supply terminal; the output terminal of the voltage divider circuit 20 is connected to the input terminal of the NOT gate module 50; the output terminal of the NOT gate module 50 is connected to the controlled terminal of the first switch module 30 and the controlled terminal of the second switch module 40; the interface 10 is used to connect the power supply voltage; the voltage divider circuit 20 is used to... When a power supply voltage is applied, the power supply voltage is divided, and the divided voltage value is output to the NOT gate module 50. The NOT gate module 50 is used to output a first command to the first switch module 30 and a second command to the second switch module 40 when the divided voltage value is greater than a preset threshold. The NOT gate module 50 is also used to output a second command to the first switch module 30 and a first command to the second switch module when the divided voltage value is less than a preset threshold. The first switch module 30 is used to connect the path between the interface 10 and the first power supply terminal when the first command is received. The second switch module 40 is used to connect the path between the interface 10 and the second power supply terminal when the first command is received.

[0077] This invention divides the power supply voltage using a voltage divider circuit 20 and uses a NOT gate module 50 to distinguish the divided voltages, outputting corresponding combinations of commands to two switching modules. This enables the connection between the interface 10 and the power supply terminal corresponding to the input power supply voltage value to be made open, while the other connection is turned off. This achieves adaptive switching of the output power terminal to match the power supply voltage.

[0078] In existing laser mainframes, the power supply circuits are typically designed according to different power levels and intended applications, enabling the power supply circuit to output the required voltage, such as the common 48V or 24V. The interface in this invention, after connecting to the power supply circuit of the laser mainframe, can distinguish the corresponding voltage and then automatically connect to the corresponding power terminal, outputting to the corresponding drive circuit. It can adapt to laser mainframes with multiple different types of power supply circuits.

[0079] In the second embodiment, as Figure 4 As shown, the voltage divider circuit 20 includes: a first impedance unit 210, a second impedance unit 220, and at least one Zener diode;

[0080] At least one Zener diode is connected in series in the same direction to form a first positive terminal and a first negative terminal;

[0081] The first end of the first impedance unit 210 is connected to the interface 10, and the second end is connected to the first negative terminal of at least one Zener diode; the first positive terminal of at least one Zener diode is connected to the first end of the second impedance unit 220 and the input terminal of the NOT gate module 50; the second end of the second impedance unit 220 is grounded.

[0082] It should be clarified that the first impedance unit 210, the second impedance unit 220, and at least one Zener diode are connected in series to form a series voltage divider circuit. Specifically, the first terminal of the second impedance unit 220 is the input terminal of the NOT gate module 50, and the second terminal is grounded; the voltage value at the input terminal of the NOT gate module 50 is the voltage difference across the two terminals of the second impedance unit 220. The series voltage divider circuit divides the power supply voltage connected to interface 10. In addition, at least one Zener diode is used to clamp the voltage value across the Zener diode, adjusting the voltage value at the input terminal of the NOT gate module 50. It is easy to understand that the number of Zener diodes and their stable voltages will affect the voltage value clamped across the at least one Zener diode, specifically the sum of the stable voltages of all Zener diodes. The first impedance unit 210 and the second impedance unit 220 divide the difference between the power supply voltage and the clamping voltage, and output the corresponding divided voltage value to the input terminal of the NOT gate module 50; in addition, the first impedance unit 210 and the second impedance unit 220 are also used to limit the current flowing through the Zener diode to ground.

[0083] It is easy to understand that the first power supply voltage value and the second power supply voltage value can be divided by setting the clamping voltage value across at least one Zener diode and the voltage division coefficient of the first impedance unit 210 and the second impedance unit 220, so that the power supply voltage after voltage division can be distinguished by using a preset threshold.

[0084] This embodiment does not limit the specific implementation of the first impedance unit 210 and the second impedance unit 220, as long as the above-mentioned voltage division of the power supply voltage is satisfied; for example: a resistor voltage divider circuit.

[0085] In one example, such as Figure 5 As shown, the first impedance unit 210 includes a first resistor R1; the second impedance unit 220 includes a second resistor R2 and a first capacitor C1.

[0086] The first end of the first resistor R1 is connected to interface 10, and the second end is connected to the first negative terminal; the first positive terminal is connected to the first end of the second resistor R2 and the first end of the first capacitor C1; the second end of the second resistor R2 is grounded.

[0087] The resistor divider circuit, consisting of the first resistor R1 and the second resistor R2, divides the difference between the power supply voltage and the clamping voltage, outputting the divided voltage to the input of the NOT gate circuit. The first capacitor C1 is used to stabilize the voltage value at the input of the NOT gate circuit. In addition, the first capacitor C1 can also be used to filter out noise and smooth the voltage waveform.

[0088] In the third embodiment, as Figure 6 As shown, the first switch module 30 includes: a first switch device 310, a second switch device 320, a third resistor R3, and a fourth resistor R4;

[0089] Interface 10 connects to the first terminal of the first switching device 310, the first terminal of the second switching device 320, and the first terminal of the third resistor R3; the first power supply terminal connects to the second terminal of the first switching device 310 and the second terminal of the second switching device 320; the second terminal of the third resistor R3 connects to the controlled terminal of the first switching device 310, the controlled terminal of the second switching device 320, and the first terminal of the fourth resistor R4; the second terminal of the fourth resistor R4 connects to the output terminal of the first NOT gate 510.

[0090] The first switching device 310 and the second switching device 320 are both used to connect the interface 10 and the first power supply terminal when a first instruction is received.

[0091] It should be noted that the first switching device 310 and the second switching device 320 are connected in parallel, with the controlled terminals of the first switching device 310 and the second switching device 320 connected together. A third resistor R3 is positioned between the interface 10 and the controlled terminal of the first switching device 310, and a fourth resistor R4 is positioned between the controlled terminal of the first switching device 310 and the output terminal of the first NOT gate 510. The third resistor R3 and the fourth resistor R4 are used to separate the interface 10, the controlled terminal of the first switching device 310, and the output terminal of the first NOT gate 510, ensuring a potential difference among the three.

[0092] In one example, the first switching device 310 and the second switching device 320 are turned on when the first NOT gate 510 outputs a low level; initially, the voltage at the controlled terminal of the first switching device 310 is equal to the voltage at interface 10. When the first NOT gate 510 outputs a first command (low level), the third resistor R3 and the fourth resistor R4 form a resistor divider circuit, pulling down the voltage at the controlled terminals of the first switching device 310 and the second switching device 320, thus turning on the first switching device 310 and the second switching device 320. The first switching device 310 and the second switching device 320 can be PMOS transistors, PNP transistors, relays, or P-channel IGBTs, etc.

[0093] In another example, the first switching device 310 and the second switching device 320 are turned on when the first NOT gate 510 outputs a high level. Initially, the voltage at the controlled terminal of the first switching device 310 is equal to the voltage at interface 10. When the first NOT gate 510 outputs a first command (high level), the third resistor R3 and the fourth resistor R4 form a resistor divider circuit. Under the influence of the high level output of the first NOT gate 510, the voltage at the controlled terminals of the first switching device 310 and the second switching device 320 is increased, and the first switching device 310 and the second switching device 320 are turned on. The first switching device 310 and the second switching device 320 can be NMOS transistors, NPN power transistors, relays, or N-channel IGBTs, etc. In this example, the voltage amplitude corresponding to the high level output of the first NOT gate 510 can be higher than the power supply voltage.

[0094] like Figure 7 As shown, the second switch module 40 includes: a third switch device 410, a fourth switch device 420, a fifth resistor R5, and a sixth resistor R6;

[0095] Interface 10 connects to the first terminal of the third switching device 410, the first terminal of the fourth switching device 420, and the first terminal of the fifth resistor R5; the second power supply terminal connects to the second terminal of the third switching device 410 and the second terminal of the fourth switching device 420; the second terminal of the fifth resistor R5 connects to the controlled terminal of the third switching device 410, the controlled terminal of the fourth switching device 420, and the first terminal of the sixth resistor R6; the second terminal of the sixth resistor R6 connects to the output terminal of the second NOT gate 520.

[0096] The third switching device 410 and the fourth switching device 420 are both used to connect the path between the interface 10 and the second power supply terminal upon receiving the first instruction.

[0097] It should be noted that the third switching device 410 and the fourth switching device 420 are connected in parallel, with the controlled terminals of the third switching device 410 and the fourth switching device 420 connected together. A fifth resistor R5 is placed between the interface 10 and the controlled terminal of the third switching device 410, and a sixth resistor R6 is placed between the controlled terminal of the third switching device 410 and the output terminal of the second NOT gate 520. The fifth resistor R5 and the sixth resistor R6 are used to separate the interface 10, the controlled terminal of the third switching device 410, and the output terminal of the second NOT gate 520, ensuring a potential difference among the three.

[0098] In one example, the third switch 410 and the fourth switch 420 are turned on when the second NOT gate 520 outputs a low level. Initially, the voltage at the controlled terminal of the third switch 410 is equal to the voltage at interface 10. When the second NOT gate 520 outputs the first instruction (low level), the fifth resistor R5 and the sixth resistor R6 form a resistor divider circuit, pulling down the voltage at the controlled terminals of the third switch 410 and the fourth switch 420, thus turning on the third switch 410 and the fourth switch 420. The third switch 410 and the fourth switch 420 can be PMOS transistors, PNP transistors, relays, or P-channel IGBTs, etc.

[0099] In another example, the third switch 410 and the fourth switch 420 are turned on when the second NOT gate 520 outputs a high level. Initially, the voltage at the controlled terminal of the third switch 410 is equal to the voltage at interface 10. When the second NOT gate 520 outputs the first command (high level), the fifth resistor R5 and the sixth resistor R6 form a resistor divider circuit. Under the influence of the high level output of the second NOT gate 520, the voltage at the controlled terminals of the third switch 410 and the fourth switch 420 is increased, and the third switch 410 and the fourth switch 420 are turned on. The third switch 410 and the fourth switch 420 can be NMOS transistors, NPN power transistors, relays, or N-channel IGBTs, etc. In this example, the voltage amplitude corresponding to the high level output of the second NOT gate 520 can be higher than the power supply voltage.

[0100] like Figure 8 and Figure 9 As shown, in the fourth embodiment, the NOT gate module 50 further includes: a first driving circuit 530 and a second driving circuit 540;

[0101] The first end of the first driving circuit 530 is connected to the controlled end of the first switching module 30, the second end is connected to the first voltage, and the controlled end is connected to the output end of the first NOT gate 510.

[0102] The first end of the second driving circuit 540 is connected to the controlled end of the second switching module 40, the second end is connected to the second voltage, and the controlled end is connected to the output end of the second NOT gate 520.

[0103] The first driving circuit 530 is used to turn on the path between the first switching module 30 and the first voltage when a first instruction is received.

[0104] The second drive circuit 540 is used to connect the first switch module 30 and the second voltage when the first instruction is received.

[0105] It should be noted that, compared to the previous embodiments where the first NOT gate 510 and the second NOT gate 520 were used to directly drive the first switch module 30 and the second switch module 40 to turn on / off, this embodiment uses the first drive circuit 530 and the second drive circuit 540 to turn on / off the first switch module 30 and the second switch module 40, reducing the driving capability requirements of the first NOT gate 510 and the second NOT gate 520. Specifically, when the interface 10 is connected to a first power supply voltage value, the first NOT gate 510 outputs a first command to the first drive circuit 530, so that the first drive circuit 530 conducts the path between the first switch module 30 and the first voltage. When the interface 10 is connected to a second power supply voltage value, the second NOT gate 520 outputs a first command to the second drive circuit 540, so that the second drive circuit 540 conducts the path between the first switch module 30 and the second voltage.

[0106] Upon receiving the second instruction, the first drive circuit 530 and the second drive circuit 540 are shut down.

[0107] It should be noted that the voltage values ​​of the first voltage and the second voltage depend on the conduction conditions of the first switching module 30 and the second switching module 40. Researchers can determine the first voltage and the second voltage based on the first switching module 30 and the second switching module 40. The first driving circuit 530 and the second driving circuit 540 may include transistors, MOSFETs, relays, or IGBTs, etc.

[0108] In one example, the first switch module 30 is turned on when the voltage at its controlled terminal is lower than its turn-on voltage value; the second switch module 40 is turned on when the voltage at its controlled terminal is lower than the second turn-on voltage value; correspondingly, the first voltage is lower than the turn-on voltage value of the first switch module 30, and the second voltage is lower than the turn-on voltage value of the second switch module 40.

[0109] In particular, such as Figure 10 As shown, the first voltage and the second voltage can be zero voltage. That is, the second terminal of the first driving circuit 530 is grounded; the second terminal of the second driving circuit 540 is grounded.

[0110] The first driving circuit 530 is used to connect the first switching module 30 and ground when a first instruction is received.

[0111] The second drive circuit 540 is used to connect the first switch module 30 to ground upon receiving the first instruction.

[0112] In another example, the first switch module 30 is turned on when the voltage at its controlled terminal is higher than its turn-on voltage value; the second switch module 40 is turned on when the voltage at its controlled terminal is higher than the second turn-on voltage value; correspondingly, the first voltage is higher than the turn-on voltage value of the first switch module 30, and the second voltage is higher than the turn-on voltage value of the second switch module 40.

[0113] However, it should be clarified that although this embodiment uses the first driving circuit 530 and the second driving circuit 540 to reduce the driving capability requirements of the first NOT gate 510 and the second NOT gate 520, and changes the conduction status of the first driving circuit 530 and the second driving circuit 540 to respectively enable the first switching module 30 and the second switching module 40, disconnecting the first voltage from the first driving circuit 530 will cause the control effect of the first NOT gate 510 on the first switching module 30 to fail, resulting in the first switching module 30 being turned off. Similarly, disconnecting the second voltage from the second driving circuit 540 will cause the control effect of the second NOT gate 520 on the second switching module 40 to fail, resulting in the second switching module 40 being turned off.

[0114] Utilizing the above characteristics, and combining the fact that the second terminal of the first driving circuit 530 is grounded and the second terminal of the second driving circuit 540 is grounded, a fifth embodiment of this utility model is proposed. In the fifth embodiment, as follows... Figure 11 As shown, the two-power adaptive switching circuit also includes: a fifth switching device;

[0115] The first terminal of the fifth switching device is connected to the second terminal of the first driving circuit 530 and the second terminal of the second driving circuit 540; the second terminal of the fifth switching device is grounded.

[0116] The fifth switching device is used to turn off the path between the second terminal of the first driving circuit 530 and ground when the voltage at the controlled terminal of the fifth switching device meets the preset conduction conditions.

[0117] It should be noted that in this embodiment, the first switch module 30 and the second switch module 40 are turned on by the corresponding turn-on of the first drive circuit 530 and the second drive circuit 540, and the ground potential is used to pull down the potential of the controlled terminal of the first switch module 30 and the controlled terminal of the second switch module 40.

[0118] This embodiment allows the path between the second terminal of the first drive circuit 530 and ground to be turned on or off by adjusting the voltage at the controlled terminal of the fifth switching device. Specifically, the fifth switching device is used to turn off the path between the second terminal of the first drive circuit 530 and ground when the voltage at the controlled terminal of the fifth switching device meets a preset conduction condition.

[0119] It should be noted that this utility model does not limit the type of the fifth switching device. In one example, the fifth switching device is turned on when the voltage at its controlled terminal is greater than or equal to its conduction threshold, and turned off when the voltage at its controlled terminal is less than its conduction threshold.

[0120] In another example, the fifth switching device is turned on when the voltage at its controlled terminal is less than or equal to its turn-on threshold, and turned off when the voltage at its controlled terminal is greater than its turn-on threshold.

[0121] The turn-on threshold can be the turn-on voltage value of the fifth switching device.

[0122] The fifth switching device can be a MOSFET, IGBT, transistor, or thyristor, etc.

[0123] Based on the above, considering that when the fifth switching device is off, regardless of whether the first or second power supply voltage value is connected to interface 10, and whether the NOT gate module 50 outputs the first or second instruction, both the first switching module 30 and the second switching module 40 are turned off. Therefore, the controlled terminal of the fifth switching device can be connected to the output terminal of the protection circuit. In the event of a circuit or equipment malfunction, the protection circuit outputs a voltage lower than a set threshold to the fifth switching device, causing the fifth switching device to turn off. This achieves rapid shutdown of the first switching module 30 and the second switching module 40.

[0124] The protection circuit can be an over-temperature protection circuit, an over-current protection circuit, or an over-voltage protection circuit, etc.

[0125] This utility model also proposes a laser host, which includes two power adaptive switching circuits. The specific structure of the two power adaptive switching circuits is as described in the above embodiments. Since this laser host adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0126] This utility model also proposes a laser therapy device, including a handpiece, an optical transmission module, and the laser host; the laser host is used to emit laser light and transmit it to the handpiece through the optical transmission module. Referring to the above description, since this laser host adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0127] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A dual-power adaptive switching circuit, characterized in that, The two-way power supply adaptive switching circuit includes: Interface, first switch module, second switch module, voltage divider circuit, NOT gate module; The interfaces are respectively connected to the input terminals of the first switch module, the second switch module, and the voltage divider circuit; the output terminal of the first switch module is connected to the first power supply terminal, and the output terminal of the second switch module is connected to the second power supply terminal; the output terminal of the voltage divider circuit is connected to the input terminal of the NOT gate module; the output terminal of the NOT gate module is connected to the controlled terminal of the first switch module and the controlled terminal of the second switch module. The interface is used to connect to a power supply voltage; the voltage divider circuit is used to divide the power supply voltage when the interface is connected to the power supply voltage, and output the divided voltage value to the NOT gate module; the NOT gate module is used to output a first instruction to the first switch module and a second instruction to the second switch module when the divided voltage value is greater than a preset threshold; the NOT gate module is also used to output a second instruction to the first switch module and a first instruction to the second switch module when the divided voltage value is less than a preset threshold. The first switch module is used to connect the path between the interface and the first power supply terminal upon receiving a first instruction. The second switch module is used to connect the interface and the second power supply terminal when a first instruction is received.

2. The dual-power adaptive switching circuit as described in claim 1, characterized in that, The voltage divider circuit includes: a first impedance unit, a second impedance unit, and at least one Zener diode; At least one of the Zener diodes is connected in series in the same direction to form a first positive terminal and a first negative terminal; The first end of the first impedance unit is connected to the interface, and the second end is connected to the first negative terminal of the at least one Zener diode; the first positive terminal of the at least one Zener diode is connected to the first end of the second impedance unit and the input terminal of the NOT gate module; the second end of the second impedance unit is grounded.

3. The dual-power adaptive switching circuit as described in claim 2, characterized in that, The first impedance unit includes a first resistor; the second impedance unit includes a second resistor and a first capacitor; The first end of the first resistor is connected to the interface, and the second end is connected to the first negative terminal; the first positive terminal is connected to the first end of the second resistor and the first end of the first capacitor; the second end of the second resistor is grounded.

4. The dual-power adaptive switching circuit as described in any one of claims 1 to 3, characterized in that, The NOT gate module includes: a first NOT gate and a second NOT gate; The input terminal of the first NOT gate is connected to the output terminal of the voltage divider circuit, and the output terminal is connected to the controlled terminal of the first switching module and the input terminal of the second NOT gate; the output terminal of the second NOT gate is connected to the controlled terminal of the second switching module.

5. The dual-power adaptive switching circuit as described in claim 4, characterized in that, The first switching module includes: a first switching device, a second switching device, a third resistor, and a fourth resistor; The interface connects to the first terminal of the first switching device, the first terminal of the second switching device, and the first terminal of the third resistor; the first power supply terminal connects to the second terminal of the first switching device and the second terminal of the second switching device; the second terminal of the third resistor connects to the controlled terminal of the first switching device, the controlled terminal of the second switching device, and the first terminal of the fourth resistor; the second terminal of the fourth resistor connects to the output terminal of the first NOT gate. Both the first and second switching devices are used to connect the path between the interface and the first power supply terminal upon receiving the first instruction.

6. The dual-power adaptive switching circuit as described in claim 4, characterized in that, The NOT gate module further includes: a first driving circuit and a second driving circuit; The first end of the first driving circuit is connected to the controlled end of the first switching module, the second end is connected to the first voltage, and the controlled end is connected to the output end of the first NOT gate. The first end of the second driving circuit is connected to the controlled end of the second switching module, the second end is connected to the second voltage, and the controlled end is connected to the output end of the second NOT gate; The first driving circuit is used to turn on the path between the first switching module and the first voltage upon receiving the first instruction. The second driving circuit is used to connect the path between the first switching module and the second voltage upon receiving the first instruction.

7. The dual-power adaptive switching circuit as described in claim 6, characterized in that, The second terminal of the first driving circuit is grounded; the second terminal of the second driving circuit is grounded. The first driving circuit is used to connect the first switching module to ground upon receiving the first instruction. The second driving circuit is used to connect the first switching module to ground upon receiving the first instruction.

8. The dual-power adaptive switching circuit as described in claim 7, characterized in that, The adaptive switching circuit for the two power supplies also includes: a fifth switching device; The first terminal of the fifth switching device is connected to the second terminal of the first driving circuit and the second terminal of the second driving circuit; the second terminal of the fifth switching device is grounded. The fifth switching device is used to turn off the path between the second terminal of the first driving circuit and ground when the voltage at the controlled terminal of the fifth switching device meets the preset conduction conditions.

9. A laser main unit, characterized in that, The laser host includes a dual-power adaptive switching circuit as described in any one of claims 1 to 8.

10. A laser therapy device, characterized in that, It includes a handle, an optical transmission module, and the laser host as described in claim 9; the laser host is used to emit laser light and transmit it to the handle via the optical transmission module.

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