Control circuit based on timer triggering and electronic equipment

Abstract

The invention discloses a control circuit based on timer triggering and electronic equipment, and is applied to the technical field of safety control of medical electronic equipment. The control circuit based on timer triggering comprises a timer circuit, a protection circuit, a discharging circuit and a timing charging circuit. The timer circuit controls the on or off of the infrared therapeutic apparatus according to a reset signal sent by the main control unit and a pulse signal sent by the main control unit through the protection circuit, and controls the treatment time through the discharging circuit and the timing charging circuit when the infrared therapeutic apparatus starts a treatment stage. A device for controlling the on / off of the infrared therapeutic instrument is an electronic component, so that the problem of mistaken touch easily occurring when a mechanical switch is used for power-on and power-off operation is reduced, and the reliability is improved; meanwhile, the treatment time is controlled through the discharging circuit and the timing charging circuit, so that the flexibility of the control circuit is enhanced, and the requirements of different scenes and users are met.

Description

Technical Field

[0001] This application relates to the field of safety control technology for medical electronic equipment, and in particular to a control circuit and electronic equipment based on timer triggering. Background Technology

[0002] Infrared laser therapy is a treatment device that uses infrared lasers of specific wavelengths (usually low-intensity lasers or cold lasers) to irradiate human tissues to produce photobiomodulation (PBM). Unlike high-power surgical lasers, it does not produce cutting or burning effects, but rather has a positive impact on cell function through non-thermal effects.

[0003] Currently, infrared laser therapy devices are typically controlled using mechanical switches or fixed-period timers. However, when mechanical switches are powered on or off, accidental activation or deactivation can occur, preventing automatic control of the infrared laser therapy device and resulting in poor reliability. Furthermore, when controlling the power supply of the therapy device using a fixed-period timer, the internal comparator waits for the timer to finish after the timer's cycle is set. Once triggered, the comparator forcibly shuts off the power output. This method cannot adjust the treatment duration in real time and requires manual reset after the timer expires, interfering with the continuous treatment process and resulting in low flexibility.

[0004] In view of the above-mentioned technologies, finding a control circuit with high reliability and high flexibility is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a timer-triggered control circuit and electronic device. This solves the problems of unreliability in existing technologies where power-on / off operations via mechanical switches are prone to accidental activation or deactivation, and the inability to flexibly adjust treatment time due to fixed-period timer control of the therapeutic device's power supply.

[0006] To solve the above-mentioned technical problems, this application provides a control circuit based on timer triggering, including: a timer circuit, a protection circuit, a discharge circuit, and a timed charging circuit;

[0007] The reset terminal of the timer circuit is connected to the first output terminal of the main control unit, the input terminal of the timer circuit is connected to the first terminal of the protection circuit, the threshold terminal and discharge terminal of the timer circuit are connected to the control terminal of the timed charging circuit and the first terminal of the discharge circuit, and the output terminal of the timer circuit is connected to the infrared therapy device.

[0008] The second terminal of the protection circuit is connected to the second output terminal of the main control unit;

[0009] The second end of the discharging circuit is connected with the third output end of the main control unit;

[0010] The timer circuit controls the opening or closing of the infrared therapeutic instrument according to the reset signal sent by the main control unit and the pulse signal sent by the protection circuit, and controls the treatment time through the discharging circuit and the timing charging circuit when the infrared therapeutic instrument is in the treatment stage.

[0011] Preferably, the protection circuit comprises a first triode, a first resistor and a first capacitor.

[0012] The first end of the first capacitor is connected with the second output end of the main control unit as the second end of the protection circuit.

[0013] The second end of the first capacitor is connected with the base of the first triode.

[0014] The collector of the first triode is connected with the first end of the first resistor, and is connected with the input end of the timer circuit as the first end of the protection circuit.

[0015] The emitter of the first triode is grounded.

[0016] The second end of the first resistor is connected with the power supply.

[0017] Preferably, the timing charging circuit comprises a second resistor and a second capacitor.

[0018] The first end of the second resistor is connected with the power supply.

[0019] The second end of the second resistor is connected with the first end of the second capacitor, and is connected with the threshold end and the discharging end of the timer circuit and the first end of the discharging circuit as the control end of the timing charging circuit.

[0020] The second end of the second capacitor is grounded.

[0021] Preferably, the discharging circuit comprises a third capacitor and a second triode.

[0022] The first end of the third capacitor is connected with the third output end of the main control unit as the second end of the discharging circuit.

[0023] The second end of the third capacitor is connected with the base of the second triode.

[0024] The collector of the second triode is connected with the threshold end and the discharging end of the timer circuit and the control end of the timing charging circuit as the first end of the discharging circuit.

[0025] The emitter of the second triode is grounded.

[0026] Preferably, it further comprises a fourth capacitor.

[0027] The first end of the fourth capacitor is connected with the power supply end of the timer circuit and the power supply.

[0028] The second end of the fourth capacitor is grounded.

[0029] Preferably, further comprising: a fifth capacitor;

[0030] The first end of the fifth capacitor is connected with the access end of the timer circuit.

[0031] The second end of the fifth capacitor is grounded.

[0032] Preferably, comprising: a filter circuit;

[0033] The input end of the filter circuit is connected with the output end of the timer circuit.

[0034] The output end of the filter circuit is connected with the infrared therapeutic instrument.

[0035] Preferably, the filter circuit comprises: a third resistor and a sixth capacitor.

[0036] The first end of the third resistor is the input end of the filter circuit, which is connected with the output end of the timer circuit.

[0037] The second end of the third resistor is connected with the first end of the sixth capacitor, and they are connected with the infrared therapeutic instrument as the output end of the filter circuit.

[0038] The second end of the sixth capacitor is grounded.

[0039] Preferably, the timer circuit comprises: a first comparator, a second comparator, a NOT gate, a flip-flop, a third transistor, a fourth resistor, a fifth resistor and a sixth resistor.

[0040] The first input end of the first comparator is connected with the control end of the timing charging circuit and the first end of the discharging circuit as the threshold end of the timer circuit.

[0041] The second input end of the first comparator is connected with the first end of the fourth resistor and the first end of the fifth resistor, and they are connected as the access end of the timer circuit.

[0042] The second end of the fourth resistor is connected with the power supply.

[0043] The output end of the first comparator is connected with the first input end of the flip-flop.

[0044] The first input end of the second comparator is connected with the second end of the fifth resistor and the first end of the sixth resistor.

[0045] The second input end of the second comparator is connected with the first end of the protection circuit as the input end of the timer circuit.

[0046] The output end of the second comparator is connected with the second input end of the flip-flop;

[0047] The reset end of the flip-flop is connected with the first output end of the master control unit as the reset end of the timer circuit;

[0048] The output end of the flip-flop is connected with the base of the third transistor and the input end of the NOT gate;

[0049] The emitter of the third transistor is connected with the second end of the sixth resistor and is connected with the ground of the timer circuit together;

[0050] The collector of the third transistor is connected with the control end of the timing charging circuit and the first end of the discharging circuit as the discharge end of the timer circuit;

[0051] The output end of the NOT gate is connected with the infrared therapeutic instrument as the output end of the timer circuit.

[0052] In another aspect, the application further provides an electronic device comprising the above-mentioned timer-triggered control circuit.

[0053] Therefore, the timer-triggered control circuit provided by the application controls the infrared therapeutic instrument to be turned on or turned off through the timer circuit according to the reset signal sent by the master control unit and the pulse signal sent by the master control unit through the protection circuit, and controls the treatment time through the discharging circuit and the timing charging circuit when the infrared therapeutic instrument is in the treatment stage, so that the device for controlling the infrared therapeutic instrument to be turned on or turned off is an electronic component, the mis-touching problem that is prone to occur when the mechanical switch is used for power-on and power-off operation is reduced, and the reliability is improved. At the same time, the flexibility of the control circuit is enhanced by controlling the treatment time through the discharging circuit and the timing charging circuit to meet the needs of different scenes and users. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0055] Figure 1 A structure diagram of the timer-triggered control circuit is provided for the embodiments of the application;

[0056] Figure 2 A circuit diagram of the timer-triggered control circuit is provided for the embodiments of the application;

[0057] Figure 3 A circuit diagram of the timer circuit is provided for the embodiments of the application. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0059] The core of the present application is to provide a control circuit based on timer triggering and an electronic device.

[0060] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0061] Figure 1 A structural diagram of a control circuit based on timer triggering is provided for the embodiments of the present application, which comprises a timer circuit 1, a protection circuit 2, a discharge circuit 3 and a timing charging circuit 4, in addition to which, Figure 1 The control circuit based on timer triggering further comprises a master control unit 5 and an infrared therapeutic instrument 6.

[0062] The connection relationship of the control circuit based on timer triggering is that the reset end RESET of the timer circuit 1 is connected with the first output end of the master control unit, the input end TRIG of the timer circuit 1 is connected with the first end of the protection circuit 2, the threshold end THRES and the discharge end DISCH of the timer circuit 1 are connected with the control end of the timing charging circuit 4 and the first end of the discharge circuit 3, and the output end OUT of the timer circuit 1 is connected with the infrared therapeutic instrument 6; the second end of the protection circuit 2 is connected with the second output end of the master control unit 5; and the second end of the discharge circuit 3 is connected with the third output end of the master control unit 5.

[0063] In the embodiments, the principle of the circuit is that when the reset signal received by the timer circuit 1 is a low-level signal (it can be understood that the reset end RESET of the timer circuit 1 is at low level), the output end OUT of the timer circuit 1 is at low level, at this time the infrared therapeutic instrument 6 is turned off; when the reset signal received by the timer circuit 1 is a high-level signal (it can be understood that the reset end of the timer circuit 1 is at high level), if a pulse signal sent through the protection circuit 2 (this pulse signal can be understood as a pulse) is received, at this time the infrared therapeutic instrument 6 is turned on, so as to perform treatment; during the treatment, that is, when the infrared therapeutic instrument 6 is turned on, the timing charging circuit 4 starts charging, and when the threshold end THRES of the timer circuit 1 detects that the timing charging circuit 4 reaches a certain threshold value, the output end of the timer circuit 1 is pulled down, so as to turn off the infrared therapeutic instrument 6. However, when the timing charging circuit 4 is charging, the discharge circuit 3 discharges the timing charging circuit 4, so as to prevent the timing charging circuit 4 from reaching the threshold value, thereby controlling the treatment time.

[0064] That is, the protection circuit 2 in the application is connected between the input end of the timer circuit 1 and the second output end of the master control unit, and converts the signal output by the second output end of the master control unit 5 into a pulse signal. Since the pulse signal is not a continuous signal but a single signal, when the master control unit 5 fails, the signal will not be continuously sent to the input end of the timer circuit 1, thereby playing a role of circuit protection.

[0065] The discharge circuit 3 is connected between the master control unit 5 and the timing charging circuit 4. When the timing charging circuit 4 is charging, the master control unit 5 sends a discharge signal to the discharge circuit 3 for discharging the timing charging circuit 4. It should be noted that the discharge operation is similar to the operation of the pulse signal. The discharge circuit 3 makes the timing charging circuit 4 close to the threshold (i.e., full charging), but does not reach the threshold. In this way, the timing charging circuit 4 is always in a charging state, and the infrared therapeutic instrument 6 is always in a treatment stage. When the master control unit 5 sends a stop discharge signal to the discharge circuit 3, the timing charging circuit 4 reaches the threshold instantaneously, and then the infrared therapeutic instrument 6 is turned off, thereby achieving the effects of flexible adjustment of treatment time and fast response speed.

[0066] The control circuit based on the timer trigger provided in the application comprises a timer circuit, a protection circuit, a discharge circuit and a timing charging circuit. The reset end of the timer circuit is connected with the first output end of the master control unit, the input end of the timer circuit is connected with the first end of the protection circuit, the threshold end and the discharge end of the timer circuit are connected with the control end of the timing charging circuit and the first end of the discharge circuit, and the output end of the timer circuit is connected with the infrared therapeutic instrument. The second end of the protection circuit is connected with the second output end of the master control unit, and the second end of the discharge circuit is connected with the third output end of the master control unit. As can be seen, the control circuit based on the timer trigger provided in the application controls the opening or closing of the infrared therapeutic instrument by the reset signal sent by the master control unit and the pulse signal sent by the master control unit through the protection circuit, and controls the treatment time by the discharge circuit and the timing charging circuit when the infrared therapeutic instrument is in the treatment stage. The device for controlling the opening or closing of the infrared therapeutic instrument is an electronic component, which reduces the false touch problem that is prone to occur when the mechanical switch is used for power-on and power-off operation, and increases the reliability. At the same time, the control circuit based on the timer trigger provided in the application enhances the flexibility of the control circuit by controlling the treatment time through the discharge circuit and the timing charging circuit, so as to meet the needs of different scenes and users.

[0067] In specific embodiments, as Figure 2As shown in the circuit diagram of the control circuit triggered by the timer, the protection circuit 2 comprises a first transistor Q1, a first resistor R1 and a first capacitor C1; the timing charging circuit 4 comprises a second resistor R2 and a second capacitor C2; the discharging circuit 3 comprises a third capacitor C3 and a second transistor Q2; in addition, it further comprises a fourth capacitor C4, a fifth capacitor C5, a third resistor R3 and a sixth capacitor C6.

[0068] The connection relationship is as follows: the first end of the first capacitor C1 is connected to the second end of the protection circuit 2 and the second output end of the main control unit 5; the second end of the first capacitor C1 is connected to the base of the first transistor Q1; the collector of the first transistor Q1 is connected to the first end of the first resistor R1, and they are commonly connected to the first end of the protection circuit 2 and the input end TRIG of the timer circuit 1; the emitter of the first transistor Q1 is grounded; the second end of the first resistor R1 is connected to the power supply VCC1; the first end of the second resistor R2 is connected to the power supply VCC1; the second end of the second resistor R2 is connected to the first end of the second capacitor C2, the threshold end THRES of the timer circuit 1, the discharging end DISCH and the collector of the second transistor Q2; the second end of the second capacitor C2 is grounded; the first end of the third capacitor C3 is connected to the second end of the discharging circuit 3 and the third output end of the main control unit 5; the second end of the third capacitor C3 is connected to the base of the second transistor Q2; the emitter of the second transistor Q2 is grounded; the first end of the fourth capacitor C4 is connected to the power supply end VCC of the timer circuit 1 and the power supply VCC1; the second end of the fourth capacitor C4 is grounded; the first end of the fifth capacitor C5 is connected to the access end CONT of the timer circuit 1; the second end of the fifth capacitor C5 is grounded; the first end of the third resistor R3 is connected to the output end OUT of the timer circuit 1; the second end of the third resistor R3 is connected to the first end of the sixth capacitor C6 and the infrared therapeutic instrument 6; the second end of the sixth capacitor C6 is grounded. In addition, the timer circuit 1 further comprises a grounding end GND for grounding.

[0069] In the embodiment, when the reset end RESET of the timer circuit 1 is at a low level, the output end OUT of the timer circuit 1 keeps low level output, the infrared therapeutic instrument 6 does not output and is in an off state; when the reset end RESET of the timer circuit 1 kept by the main control unit 5 is at a high level, the timer circuit 1 starts to work. When the main control unit 5 outputs a high pulse to the input end TRIG pin of the timer circuit 1 through the first capacitor C1 and the first transistor Q1, the output end OUT of the timer circuit 1 outputs a high level, so that the infrared therapeutic instrument 6 starts to output, that is, the treatment can start. At the same time, the second capacitor C2 starts to charge through the second resistor R2, and the threshold end THRES voltage of the timer circuit 1 continuously rises in the charging process, until it rises to the threshold value, the output end of the timer circuit 1 outputs a low level, the infrared therapeutic instrument 6 is turned off and the treatment is ended.

[0070] The time for the second capacitor C2 to be charged from the initial state to the trigger threshold can be adjusted by the resistance value of the second resistor R2 and the capacitance value of the second capacitor C2. For example, the resistance value of the second resistor R2 is set to 1MΩ, and the capacitance value of the second capacitor C2 is set to 100nF. Under this condition, the charging time is about 100ms, and the trigger threshold can be reached. That is, according to the above parameters, the infrared therapeutic instrument 6 can work for about 100ms after a single pulse trigger, which is far from meeting the actual demand. Therefore, a combination of a third capacitor C3 and a second triode Q2 is added to the end of the second capacitor C2 close to the power supply, and the main control unit 5 continuously sends a square wave with a period less than 100ms. Then, the second capacitor C2 will be repeatedly discharged through the second triode Q2 in the charging process. Therefore, as long as the square wave exists, the voltage detected by the threshold end THRES of the timer circuit 1 cannot reach the trigger threshold, and the infrared therapeutic instrument 6 can continuously output.

[0071] When the preset treatment time is reached, the main control unit 5 pulls down the reset end of the timer circuit 1 to make the output end OUT of the timer circuit 1 synchronously output a low level. Alternatively, the stop of the square wave can also make the output end OUT of the timer circuit 1 output a low level within about 100ms. If the main control unit 5 has an abnormal situation such as program runaway or crash during the treatment, the square wave will stop outputting, and the output end OUT of the timer circuit 1 will also be pulled low in a very short time, so as to turn off the infrared therapeutic instrument 6 and avoid the situation that the output cannot be turned off or even burns.

[0072] It should be noted that the embodiments provided in the present application are only one possible implementation, but are not limited to only this implementation. Users can set it themselves according to their needs.

[0073] The control circuit based on the timer trigger provided in the present application uses the AC isolation characteristic of the first capacitor and the third capacitor, so that only the jump signal of the main control unit can be responded. If the main control unit is stuck, the output of the subsequent circuit cannot be maintained, which provides protection for the safety and flexibility of the circuit.

[0074] In specific embodiments, as shown in Figure 3 The timer circuit 1 includes a first comparator U1, a second comparator U2, a NOT gate U3, a flip-flop R1, a third triode Q3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6.

[0075] The specific connection relationship of the timer circuit 1 is as follows: the first input end of the first comparator U1 is connected with the control end of the charging circuit 4 and the first end of the discharging circuit 3 as the threshold end THRES of the timer circuit 1; the second input end of the first comparator U1 is connected with the first end of the fourth resistor R4 and the first end of the fifth resistor R5, and is commonly connected as the access end CONT of the timer circuit 1; the second end of the fourth resistor R4 is connected with the power supply VCC1; the output end of the first comparator U1 is connected with the first input end of the flip-flop R1; the first input end of the second comparator U2 is connected with the second end of the fifth resistor R5 and the first end of the sixth resistor R6; the second input end of the second comparator U2 is connected with the first end of the protection circuit 2 as the input end TRIG of the timer circuit 1; the output end of the second comparator U2 is connected with the second input end of the flip-flop R1; the reset end of the flip-flop R1 is connected with the first output end of the main control unit 5 as the reset end RESET of the timer circuit 1; the output end of the flip-flop R1 is connected with the base of the third transistor Q3 and the input end of the NOT gate U3; the emitter of the third transistor Q3 is connected with the second end of the sixth resistor R6, and is commonly connected as the ground end GND of the timer circuit 1; the collector of the third transistor Q3 is connected with the control end of the charging circuit 4 and the first end of the discharging circuit 3 as the discharging end DISCH of the timer circuit 1; the output end of the NOT gate U3 is connected with the infrared therapeutic instrument 6 as the output end OUT of the timer circuit 1.

[0076] In the embodiment, the timer circuit 1 starts to work when the reset end RESET of the timer circuit 1 keeps high level, the output end OUT of the timer circuit 1 outputs high level after the input end TRIG of the timer circuit 1 receives a high level pulse, the threshold end THRES of the timer circuit 1 detects that the voltage is once higher than VCC1*2 / 3, the output end OUT of the timer circuit 1 outputs low level, and the discharging end DISCH of the timer circuit 1 starts to discharge to the ground through the third transistor Q3.

[0077] It should be noted that the embodiment provided in the application is only one possible implementation, but is not limited to only this implementation, and can be set by the user as needed.

[0078] Therefore, the control circuit based on the timer trigger provided in the application has the following advantages:

[0079] 1. The trigger time (about 100 ms) of the threshold end THRES of the timer circuit 1 is configured by setting the resistance value of the second resistor R2 and the capacitance value of the second capacitor C2, so that the output of the subsequent infrared therapeutic instrument 6 can be quickly turned off in the case of accidental crash of the main control unit 5, and the treatment process is immediately ended to avoid the possibility of burns.

[0080] 2. By the way of repeatedly discharging through the second triode Q2, the duration of the device working can be flexibly configured without interrupting a complete treatment process.

[0081] 3. The automatic shutdown mechanism realized completely by hardware has higher reliability than that realized by software or a physical switch.

[0082] In another aspect, the application further provides an electronic device comprising the above-mentioned timer-triggered control circuit and having the same beneficial effects.

[0083] The embodiments provided by the application are the same as the above-mentioned embodiments of the timer-triggered control circuit, and thus the application will not be described here.

[0084] The above describes in detail the timer-triggered control circuit and the electronic device provided by the application. The embodiments in the specification are described in a progressive manner, and each embodiment mainly describes the difference from other embodiments, and the same or similar parts of each embodiment can be understood by referring to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be understood by referring to the method part. It should be pointed out that, for those skilled in the art, without departing from the principle of the application, some improvements and modifications can be made to the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

[0085] It should be further noted that, in the specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

Claims

1. A control circuit based on timer triggering, characterized in that, include: Timer circuit, protection circuit, discharge circuit and timed charging circuit; The reset terminal of the timer circuit is connected to the first output terminal of the main control unit, the input terminal of the timer circuit is connected to the first terminal of the protection circuit, the threshold terminal and the discharge terminal of the timer circuit are connected to the control terminal of the timed charging circuit and the first terminal of the discharge circuit, and the output terminal of the timer circuit is connected to the infrared therapy device. The second terminal of the protection circuit is connected to the second output terminal of the main control unit; The second terminal of the discharge circuit is connected to the third output terminal of the main control unit; The timer circuit controls the infrared therapy device to turn on or off based on the reset signal sent by the main control unit and the pulse signal sent by the main control unit through the protection circuit. When the infrared therapy device is in the treatment phase, the treatment time is controlled by the discharge circuit and the timed charging circuit.

2. The control circuit based on timer triggering according to claim 1, characterized in that, The protection circuit includes: a first transistor, a first resistor, and a first capacitor; Wherein, the first end of the first capacitor is connected to the second output end of the main control unit as the second end of the protection circuit; The second terminal of the first capacitor is connected to the base of the first transistor; The collector of the first transistor is connected to the first end of the first resistor, and together they serve as the first end of the protection circuit and are connected to the input end of the timer circuit. The emitter of the first transistor is grounded; The second end of the first resistor is connected to the power supply.

3. The control circuit based on timer triggering according to claim 1, characterized in that, The timing charging circuit includes: a second resistor and a second capacitor; The first end of the second resistor is connected to the power supply. The second end of the second resistor is connected to the first end of the second capacitor, and together they serve as the control terminal of the timed charging circuit, connected to the threshold terminal and discharge terminal of the timer circuit, and the first end of the discharge circuit. The second terminal of the second capacitor is grounded.

4. The control circuit based on timer triggering according to claim 1, characterized in that, The discharge circuit includes: a third capacitor and a second transistor; The first terminal of the third capacitor is connected to the third output terminal of the main control unit as the second terminal of the discharge circuit. The second terminal of the third capacitor is connected to the base of the second transistor; The collector of the second transistor serves as the first terminal of the discharge circuit and is connected to the threshold terminal and discharge terminal of the timer circuit, as well as the control terminal of the timer charging circuit. The emitter of the second transistor is grounded.

5. The control circuit based on timer triggering according to claim 1, characterized in that, It also includes: the fourth capacitor; The first terminal of the fourth capacitor is connected to the power supply terminal of the timer circuit and the power supply. The second terminal of the fourth capacitor is grounded.

6. The control circuit based on timer triggering according to claim 1, characterized in that, Also includes: Fifth capacitor; The first terminal of the fifth capacitor is connected to the access terminal of the timer circuit. The second terminal of the fifth capacitor is grounded.

7. The control circuit based on timer triggering according to claim 1, characterized in that, include: Filtering circuit; The input terminal of the filter circuit is connected to the output terminal of the timer circuit. The output of the filter circuit is connected to the infrared therapy device.

8. The control circuit based on timer triggering according to claim 7, characterized in that, The filter circuit includes: a third resistor and a sixth capacitor; Wherein, the first end of the third resistor is connected to the input end of the filter circuit and the output end of the timer circuit; The second end of the third resistor is connected to the first end of the sixth capacitor, and together they serve as the output end of the filter circuit connected to the infrared therapy device. The second terminal of the sixth capacitor is grounded.

9. The timer-triggered control circuit according to any one of claims 1-8, characterized in that, The timer circuit includes: a first comparator, a second comparator, an NOT gate, a flip-flop, a third transistor, a fourth resistor, a fifth resistor, and a sixth resistor; Wherein, the first input terminal of the first comparator is connected to the control terminal of the timer circuit and the first terminal of the discharge circuit, serving as the threshold terminal of the timer circuit; The second input terminal of the first comparator is connected to the first terminal of the fourth resistor and the first terminal of the fifth resistor, and together they serve as the access terminal of the timer circuit. The second terminal of the fourth resistor is connected to the power supply; The output of the first comparator is connected to the first input of the flip-flop; The first input terminal of the second comparator is connected to the second terminal of the fifth resistor and the first terminal of the sixth resistor; The second input terminal of the second comparator is connected to the first terminal of the protection circuit as the input terminal of the timer circuit; The output of the second comparator is connected to the second input of the flip-flop; The reset terminal of the trigger is connected to the first output terminal of the main control unit as the reset terminal of the timer circuit. The output terminal of the flip-flop is connected to the base of the third transistor and the input terminal of the NOT gate; The emitter of the third transistor is connected to the second terminal of the sixth resistor, and together they serve as the ground terminal of the timer circuit. The collector of the third transistor serves as the discharge terminal of the timer circuit and is connected to the control terminal of the timer charging circuit and the first terminal of the discharge circuit. The output of the NOT gate is connected to the infrared therapy device as the output of the timer circuit.

10. An electronic device, characterized in that, Includes the timer-triggered control circuit as described in any one of claims 1-9.

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