Infusion tube cut-off control device, circuit and infusion alarm

Abstract

The embodiment of the utility model provides an infusion tube cut-off control device, a circuit and an infusion alarm, and relates to the technical field of infusion tubes. Comprising a shell, and an infrared detection circuit, a main control circuit, a direct current motor and a mechanical transmission part which are positioned in the shell. Wherein a groove used for containing an infusion tube is formed in the surface of the shell, the groove is communicated with the interior of the shell, and the infrared detection circuit and the mechanical transmission component are both close to the groove. The input end of the main control circuit is electrically connected with the output end of the infrared detection circuit, and the output end of the main control circuit is electrically connected with the input end of the direct current motor. The infrared detection circuit is used for outputting a detection signal when it is detected that no liquid exists in the infusion tube. The main control circuit is used for outputting cut-off pulse signals according to the detection signals so as to drive the direct-current motor to drive the mechanical transmission component to cut off the infusion tube. According to the infusion tube cut-off control device, the infusion tube cut-off control circuit and the infusion alarm, when no liquid exists in the infusion tube, the infusion tube can be effectively cut off in time.

Description

Technical Field

[0001] This embodiment relates to the field of infusion tube technology, specifically to an infusion tube shut-off control device, circuit, and infusion alarm. Background Technology

[0002] Monitoring the fluid in the infusion tubing is crucial during intravenous therapy. Current technology involves manually shutting off the tubing when there is no fluid to prevent backflow of blood. However, this method suffers from drawbacks such as the inability to shut off the tubing promptly and low efficiency.

[0003] Therefore, how to effectively shut off the infusion tubing in a timely manner when there is no liquid in the tubing is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this embodiment is to provide an infusion tube shut-off control device, circuit, and infusion alarm to ensure that the infusion tube is effectively shut off in a timely manner when there is no liquid in the infusion tube.

[0005] To achieve the above objectives, the technical solution adopted in this embodiment is as follows:

[0006] In a first aspect, this embodiment provides an infusion tube shut-off control device, comprising: a housing, and an infrared detection circuit, a main control circuit, a DC motor, and mechanical transmission components located inside the housing; wherein,

[0007] The surface of the housing has a groove for accommodating the infusion tube, and the groove communicates with the interior of the housing. The infrared detection circuit and the mechanical transmission component are both located near the groove; and...

[0008] The input terminal of the main control circuit is electrically connected to the output terminal of the infrared detection circuit, and the output terminal of the main control circuit is electrically connected to the input terminal of the DC motor.

[0009] The infrared detection circuit is used to output a detection signal when it detects that there is no liquid in the infusion tube;

[0010] The main control circuit is used to output a cutoff pulse signal according to the detection signal, so as to drive the DC motor to drive the mechanical transmission component to cut off the infusion tube.

[0011] Furthermore, the infrared detection circuit includes an infrared emitting module and an infrared receiving module disposed opposite to each other on both sides of the groove to form a counter-emitting pattern;

[0012] The infrared receiving module is electrically connected to the main control circuit to output the detection signal.

[0013] Furthermore, it also includes an amplification circuit, the input terminal of which is electrically connected to the output terminal of the infrared detection circuit; wherein,

[0014] The amplifier circuit includes an operational amplifier, a first input capacitor, an RC filter module, a first feedback resistor, a second feedback resistor, and a second feedback capacitor;

[0015] The non-inverting input terminal of the operational amplifier is electrically connected to the output terminal of the infrared detection circuit through the first input capacitor, and the non-inverting input terminal of the operational amplifier is connected to the RC filter module to ground.

[0016] The inverting input terminal of the operational amplifier is connected to ground by the first feedback resistor, and the inverting input terminal of the operational amplifier is also electrically connected to one end of the second feedback resistor and one end of the second feedback capacitor, respectively. The other ends of the second feedback resistor and the second feedback capacitor are both electrically connected to the output terminal of the operational amplifier.

[0017] Furthermore, it also includes a comparator circuit, the input terminal of which is electrically connected to the output terminal of the amplifier circuit, and the output terminal of which is electrically connected to the input terminal of the main control circuit;

[0018] The comparison circuit includes a comparator, a third voltage divider resistor, a fourth voltage divider resistor, a fifth feedback resistor, and a sixth feedback resistor.

[0019] The non-inverting input of the comparator is connected to the output of the operational amplifier;

[0020] The inverting input terminal of the comparator is electrically connected to one end of the third voltage divider resistor and one end of the fourth voltage divider resistor, respectively. The other end of the third voltage divider resistor is connected to the first reference power supply, and the other end of the fourth voltage divider resistor is grounded.

[0021] The output terminal of the comparator is electrically connected to one end of the fifth feedback resistor and the sixth feedback resistor, respectively. The other end of the fifth feedback resistor is connected to the first reference power supply, and the other end of the sixth feedback resistor is electrically connected to the input terminal of the main control circuit.

[0022] Furthermore, it also includes a DC motor drive circuit, wherein the input terminal of the DC motor drive circuit is electrically connected to the output terminal of the main control circuit, and the output terminal of the DC motor drive circuit is electrically connected to the input terminal of the DC motor.

[0023] The DC motor drive circuit includes a DC motor drive chip, a seventh resistor, and a third filter capacitor.

[0024] The power supply terminal of the DC motor drive chip is connected to the second reference power supply through the seventh resistor, and the power supply terminal of the DC motor drive chip is also grounded through the third filter capacitor.

[0025] The first input terminal and the second input terminal of the DC motor driver chip are electrically connected to the first output terminal and the second output terminal of the main control circuit, respectively, and the first output terminal and the second output terminal of the DC motor driver chip are electrically connected to the first input terminal and the second input terminal of the DC motor, respectively.

[0026] Furthermore, it also includes an alarm circuit, the input terminal of which is connected to the output terminal of the main control circuit;

[0027] The main control circuit is used to send an alarm signal to the alarm circuit based on the detection signal, so that the alarm circuit will sound an alarm when there is no liquid in the infusion tube.

[0028] Furthermore, the housing includes a first housing and a second housing;

[0029] The first housing and the second housing are fastened together to form a receiving cavity, and the infrared detection circuit, the main control circuit, the DC motor, and the mechanical transmission components are all disposed within the receiving cavity; and...

[0030] The groove is disposed on the surface of the first housing, and the length of the groove is the same as the length of the first housing, and the depth of the groove is the same as the height of the first housing.

[0031] Furthermore, the mechanical transmission component includes a motor transmission rod and a stop element;

[0032] The DC motor drives the stopper to move toward the infusion tube side via the motor transmission rod, thereby squeezing the infusion tube to form a stop.

[0033] Furthermore, it also includes a light guide post; the light guide post is disposed within the receiving cavity formed by the first housing and the second housing, and the light guide post penetrates the first housing, the light guide post and the cut-off member are disposed opposite each other on both sides of the groove; and,

[0034] The light guide column is controlled by the main control circuit to indicate that the infusion tube is in a cut-off state.

[0035] Furthermore, the cutoff pulse signal includes: a turn-off pulse and a continuous cutoff pulse; wherein the duty cycle of the turn-off pulse is greater than that of the continuous cutoff pulse.

[0036] Secondly, this embodiment also provides an infusion tube shut-off circuit, including:

[0037] An infrared detection circuit is installed at the infusion tube and outputs a detection signal when no liquid is detected in the infusion tube.

[0038] The main control circuit is electrically connected to the infrared detection circuit to output a cutoff pulse signal to the DC motor for cutting off the infusion tube according to the detection signal.

[0039] Furthermore, the infrared detection circuit includes an infrared emitting module and an infrared receiving module;

[0040] The infrared receiving module is electrically connected to the main control circuit, and the infrared emitting module and the infrared receiving module are arranged opposite each other on both sides of the infusion tube to form a counter-emitting pattern.

[0041] Furthermore, it also includes:

[0042] An amplifier circuit, a comparator circuit, and an infrared detection circuit are electrically connected in sequence to the infrared detection circuit.

[0043] The output terminal of the comparator circuit is electrically connected to the input terminal of the main control module;

[0044] The main control module controls the DC motor through a DC motor drive circuit.

[0045] Furthermore, the cutoff pulse signal includes: a turn-off pulse and a continuous cutoff pulse; wherein the duty cycle of the turn-off pulse is greater than that of the continuous cutoff pulse.

[0046] Thirdly, this embodiment also provides an infusion alarm, including:

[0047] DC motor; and

[0048] The mechanical transmission component, driven by the DC motor, is used to shut off the infusion tubing; and

[0049] The infusion tube cutoff circuit as described in any of the second aspects above outputs a cutoff pulse signal to control the DC motor.

[0050] Compared with the prior art, this embodiment has the following beneficial effects:

[0051] This infusion tube shut-off control device includes: a housing, and an infrared detection circuit, a main control circuit, a DC motor, and mechanical transmission components located inside the housing. By creating a groove on the surface of the housing that communicates with the interior, the infusion tube can be fixed in place, and the infrared detection circuit, located inside the housing near the groove, can automatically detect the liquid level inside the infusion tube. When no liquid is detected in the infusion tube, the infrared detection circuit outputs a detection signal. The main control circuit outputs a shut-off pulse signal based on the detection signal to drive the DC motor, which in turn moves the mechanical transmission components towards the infusion tube, thereby shutting off the infusion tube promptly and effectively. Attached Figure Description

[0052] To make the objectives, technical solutions, and advantages of this embodiment clearer, the technical solutions of this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments. The components of this embodiment described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments provided in the accompanying drawings is not intended to limit the scope of the claimed embodiments, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this embodiment without creative effort are within the scope of protection of this embodiment.

[0053] Figure 1 This is a schematic diagram of the external structure of an infusion tube shut-off control device provided in this embodiment;

[0054] Figure 2 This is one of the internal structural schematic diagrams of an infusion tube shut-off control device provided in this embodiment;

[0055] Figure 3 This is the second internal structural schematic diagram of an infusion tube shut-off control device provided in this embodiment;

[0056] Figure 4 This is a schematic diagram of an infrared detection circuit provided in this embodiment;

[0057] Figure 5 This is the third internal structural schematic diagram of an infusion tube shut-off control device provided in this embodiment;

[0058] Figure 6 This is a schematic diagram of an amplifier circuit provided in this embodiment;

[0059] Figure 7 A schematic diagram of a comparison circuit provided in this embodiment;

[0060] Figure 8 This is a schematic diagram of a main control circuit provided in this embodiment;

[0061] Figure 9 This is a schematic diagram of a DC motor drive circuit provided in this embodiment.

[0062] Reference numerals: 100-Housing; 110-First housing; 120-Second housing; 130-Groove; 140-Switch button; 200-Infrared detection circuit; 210-Infrared emitting module; 220-Infrared receiving module; 300-Main control circuit; 400-DC motor; 500-Mechanical transmission component; 510-Motor transmission rod; 520-Stop component; 530-Motor bracket; 600-Light guide column; 700-Amplifier circuit; 800-Comparator circuit; 900-DC motor drive circuit. Detailed Implementation

[0063] The technical solutions of this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this embodiment described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0064] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0065] In the description of this application, it should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0066] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0067] As mentioned in the background section, when there is no fluid in the infusion tube, the existing technology involves manually shutting off the infusion tube to prevent blood backflow from the patient. However, this method has problems such as the inability to shut off the infusion tube in a timely manner and low shut-off efficiency.

[0068] Therefore, how to effectively shut off the infusion tubing in a timely manner when there is no liquid in the tubing is a technical problem that urgently needs to be solved by those skilled in the art.

[0069] To resolve the above technical issues, please refer to Figures 1 to 3 This embodiment provides an infusion tube shut-off control device, including: a housing 100, and an infrared detection circuit 200, a main control circuit 300, a DC motor 400 and a mechanical transmission component 500 located inside the housing 100.

[0070] The housing 100 has a groove 130 on its surface for accommodating the infusion tube, and the groove 130 is connected to the interior of the housing 100. The infrared detection circuit 200 and the mechanical transmission component 500 are both located near the groove 130.

[0071] like Figure 3 As shown, the input terminal of the main control circuit 300 is electrically connected to the output terminal of the infrared detection circuit 200, and the output terminal of the main control circuit 300 is electrically connected to the input terminal of the DC motor 400.

[0072] The infrared detection circuit 200 outputs a detection signal when no liquid is detected in the infusion tube. The main control circuit 300 outputs a cutoff pulse signal based on the detection signal to drive the DC motor 400 to drive the mechanical transmission component 500 to cut off the infusion tube.

[0073] Based on the above design, by creating a groove 130 on the surface of the housing 100 that communicates with the interior of the housing 100, not only can the infusion tube be fixed, but the infrared detection circuit 200 located inside the housing 100 and near the groove 130 can also automatically detect the liquid status inside the infusion tube. When no liquid is detected in the infusion tube, the infrared detection circuit 200 outputs a detection signal. The main control circuit 300 outputs a cutoff pulse signal based on the detection signal to drive the DC motor to move the mechanical transmission component towards the infusion tube side, thereby timely and effectively cutting off the infusion tube.

[0074] Furthermore, since there are many manufacturers of infusion tubing on the market, the wall thickness, hardness, and elasticity of the tubing vary from manufacturer to manufacturer. To effectively shut off harder or more elastic infusion tubing, in this embodiment, the cutoff pulse signal includes a turn-off pulse and a continuous cutoff pulse. The duty cycle of the turn-off pulse is greater than that of the continuous cutoff pulse.

[0075] For example, the duty cycle of the turn-off pulse is 100% (equivalent to a stable high-level voltage). The duty cycle of the continuous cut-off pulse is 1%, and the frequency is 2Hz.

[0076] Based on this design, the shut-off pulse can quickly control the DC motor 400 to drive the mechanical transmission component 500 to cut off the infusion tube. The continuous shut-off pulse allows the DC motor 400 to obtain a certain rotation control intermittently, thereby ensuring that the infusion tube will not bounce back.

[0077] The infusion tubing shut-off control device provided in this embodiment can also adapt to infusion tubing with different hardness and elasticity from various manufacturers on the market, ensuring that when there is no liquid in the infusion tubing, the infusion tubing can be effectively shut off in a timely manner, forcing the infusion tubing to be unable to spring back and preventing the patient's blood from flowing back.

[0078] To better understand the technical solution of this embodiment, the following is combined with... Figures 1 to 4 First, the detection principle of the infrared detection circuit 200 will be explained.

[0079] In this embodiment, the infrared detection circuit 200 includes an infrared emitting module 210 and an infrared receiving module 220 disposed opposite to each other on both sides of the groove 130 to form a beam-to-beam configuration.

[0080] The infrared receiving module 220 is electrically connected to the main control circuit 300 to output a detection signal.

[0081] The specific structure of the infrared detection circuit 200 is as follows: Figure 4 As shown, in the infrared emitting module 210, the anode of the light-emitting diode is connected to the first reference power supply V1 (e.g., 3.3V) through the eighth resistor R8, and the cathode of the light-emitting diode is grounded through the ninth resistor R9. In the infrared receiving module 220, the collector of the transistor is connected to the first reference power supply V1 through the tenth resistor R10, and the emitter of the transistor is grounded through the eleventh resistor R11. The collector of the transistor in the infrared receiving module 220 is also the output terminal of the infrared detection circuit 200.

[0082] The light-emitting diode in the infrared emitting module 210 emits infrared light into the infusion tube (infrared light, due to its longer wavelength, can penetrate transparent or translucent plastic materials). After passing through the infusion tube, the infrared light is transmitted to the infrared receiving module 220. The infrared receiving module 220 outputs a detection signal IR based on the intensity of the received infrared light.

[0083] Specifically, when there is no liquid in the infusion tube, infrared light can directly pass through the tube wall and reach the infrared receiving module 220 on the opposite side. At this time, the infrared receiving module 220 receives a high intensity of light and outputs a detection signal IR.

[0084] In addition, to enable the main control circuit 300 to better recognize the detection signal IR sent by the infrared detection circuit 200, please refer to [link to relevant documentation]. Figure 5 In this embodiment, the infusion tube shut-off control device further includes an amplifier circuit 700 and a comparator circuit 800. The input terminal of the amplifier circuit 700 is electrically connected to the output terminal of the infrared detection circuit 200, the output terminal of the amplifier circuit 700 is electrically connected to the input terminal of the comparator circuit 800, and the output terminal of the comparator circuit 800 is electrically connected to the input terminal of the main control circuit 300.

[0085] The specific structure of amplifier circuit 700 is as follows: Figure 6 As shown, in this embodiment, the amplifier circuit 700 includes an operational amplifier U1, a first input capacitor C1, an RC filter module, a first feedback resistor R1, a second feedback resistor R2, and a second feedback capacitor C2.

[0086] The non-inverting input terminal IN+ of operational amplifier U1 is electrically connected to the output terminal of infrared detection circuit 200 through the first input capacitor C1, and an RC filter module is connected to ground at the non-inverting input terminal IN+ of operational amplifier U1. Optionally, the RC filter module includes a twelfth resistor R12 and a fifth filter capacitor C5 connected in parallel.

[0087] The inverting input terminal IN- of operational amplifier U1 is connected to ground via a first feedback resistor R1. IN- is also electrically connected to one end of a second feedback resistor R2 and a second feedback capacitor C2. The other ends of both R2 and C2 are electrically connected to the output terminal OUT1 of operational amplifier U1. OUT1 is the output terminal of amplifier circuit 700. The detection signal IR output from infrared detection circuit 200 is processed by amplifier circuit 700 and converted into an amplified voltage H_OUT1, which is then output to comparator circuit 800.

[0088] The specific structure of the comparator circuit 800 is as follows: Figure 7 As shown, in this embodiment, the comparator circuit 800 includes a comparator U2, a third voltage divider resistor R3, a fourth voltage divider resistor R4, a fifth feedback resistor R5, and a sixth feedback resistor R6.

[0089] The non-inverting input of comparator U2 is connected to the output of operational amplifier U1.

[0090] The inverting input of comparator U2 is electrically connected to one end of the third voltage divider resistor R3 and the fourth voltage divider resistor R4, respectively. The other end of the third voltage divider resistor R3 is connected to the first reference power supply V1, and the other end of the fourth voltage divider resistor R4 is grounded.

[0091] The output of comparator U2 is electrically connected to one end of the fifth feedback resistor R5 and the sixth feedback resistor R6, respectively. The other end of the fifth feedback resistor R5 is connected to the first reference power supply V1, and the other end of the sixth feedback resistor R6 is electrically connected to the input of the main control circuit 300.

[0092] Optionally, the comparator circuit 800 further includes a seventh filter capacitor C7 and an eighth filter capacitor C8. One end of the seventh filter capacitor C7 is connected to one end of the fourth voltage divider resistor R4, and the other end of the seventh filter capacitor C7 is grounded. The other end of the sixth feedback resistor R6 is also grounded through the eighth filter capacitor C8.

[0093] The specific structure of the main control circuit 300 is as follows: Figure 8 As shown, in this embodiment, the main control circuit 300 includes a main control chip U4. The input terminal PA0 of the main control chip U4 is electrically connected to the output terminal of the comparator U2.

[0094] Based on the above design, the signal received at the non-inverting input of comparator U2 is the amplified detection signal (i.e., the amplified voltage H_OUT1), and the signal received at the inverting input of comparator U2 is the reference voltage. The magnitude of the reference voltage is adjusted by changing the resistance values ​​of the third voltage divider resistor R3 and the fourth voltage divider resistor R4, ensuring that when there is no liquid in the infusion tube, the reference voltage is less than the amplified voltage H_OUT1, and comparator U2 outputs a high-level voltage H_OUT2. When there is liquid in the infusion tube, the reference voltage is greater than the amplified voltage H_OUT1, and comparator U2 outputs a low-level voltage.

[0095] When the main control chip U4 receives a low-level voltage, it indicates that there is still liquid in the infusion tube, and the main control chip U4 will not work. That is, the main control chip U4 only outputs a cutoff pulse signal when it receives a high-level voltage H_OUT2.

[0096] To ensure that the main control circuit 300 can drive the DC motor 400 to rotate, please refer to the following again. Figure 5 In this embodiment, the infusion tube shut-off control device further includes a DC motor drive circuit 900. The input terminal of the DC motor drive circuit 900 is electrically connected to the output terminal of the main control circuit 300, and the output terminal of the DC motor drive circuit 900 is electrically connected to the input terminal of the DC motor 400.

[0097] The specific structure of the DC motor drive circuit 900 is as follows: Figure 9 As shown, as an optional implementation, the DC motor drive circuit 900 includes a DC motor drive chip U3, a seventh resistor R7, and a third filter capacitor C3.

[0098] The power supply terminal VCC of the DC motor driver chip U3 is connected to the second reference power supply V2 through the seventh resistor R7, and the power supply terminal VCC of the DC motor driver chip U3 is also grounded through the third filter capacitor C3.

[0099] Please see Figure 8 and Figure 9 The first input terminal IN1 and the second input terminal IN2 of the DC motor driver chip U3 are electrically connected to the first output terminal PB4 and the second output terminal PB5 of the main control chip U4, respectively. The first output terminal OUT1 and the second output terminal OUT2 of the DC motor driver chip U3 are electrically connected to the first input terminal MOTOR- and the second input terminal MOTOR+ of the DC motor, respectively.

[0100] When the input terminal PA0 of the main control chip U4 receives a high-level voltage H_OUT2 from the comparator U2, the first output terminal PB4 and the second output terminal PB5 of the main control chip U4 send cutoff pulse signals (i.e., IN_1 and IN_2) to the first input terminal IN1 and the second input terminal IN2 of the DC motor drive chip U3. The cutoff pulse signals include a turn-off pulse and a continuous cutoff pulse, with the duty cycle of the turn-off pulse being greater than that of the continuous cutoff pulse. In some embodiments, the turn-off pulse enables rapid shut-off of the infusion tubing; for the continuous cutoff pulse, an exemplary pulse signal with a frequency of 2Hz and a duty cycle of 1% can be used to counteract the rebound of the infusion tubing.

[0101] Furthermore, to promptly alert the patient and relevant medical staff when there is no fluid in the infusion tubing, this embodiment also includes an alarm circuit in the infusion tubing shut-off control device. The input terminal of the alarm circuit is electrically connected to the output terminal of the main control circuit.

[0102] The main control circuit 300 is used to send an alarm signal to the alarm circuit based on the detection signal, so that the alarm circuit will sound an alarm when there is no liquid in the infusion tube.

[0103] Based on the above design, when the main control chip U4 receives the high-level voltage H_OUT2 output by the comparator U2, the main control chip U4 sends a cutoff pulse signal to the DC motor drive chip U3 and an alarm signal to the alarm circuit so that the alarm circuit will sound an alarm when there is no liquid in the infusion tube.

[0104] In one alternative implementation, the main control chip U4 may be an STM32 processor, for example, but not limited to.

[0105] It should be noted that this embodiment does not involve any creative improvement to the control method, nor does it involve any improvement to the method of generating the cutoff pulse signal itself.

[0106] Please refer to it again. Figure 1 and Figure 2 The specific structure of the infusion tube shut-off control device provided in this embodiment will be described below.

[0107] In this embodiment, the housing 100 includes a first housing 110 and a second housing 120. The first housing 110 and the second housing 120 are fastened together to form a receiving cavity, and the infrared detection circuit 200, the main control circuit 300, the DC motor 400 and the mechanical transmission component 500 are all disposed within the receiving cavity.

[0108] A groove 130 is disposed on the surface of the first housing 110, and the length of the groove 130 is the same as the length of the first housing 110, and the depth of the groove 130 is the same as the height of the first housing 110. In other words, the groove 130 is located on the surface of the first housing 110 and communicates with the receiving cavity.

[0109] This design ensures that the groove 130 can accommodate the infusion tube, enable the infrared detection circuit 200 inside the cavity to detect the infusion tube, and allow the main control circuit 300 and the DC motor 400 to drive the mechanical transmission component 500 inside the cavity to effectively shut off the infusion tube.

[0110] Furthermore, the specific structure of the mechanical transmission component 500 is as follows: Figure 2 As shown. In this embodiment, the mechanical transmission component 500 includes a motor drive rod 510 and a stop member 520. The DC motor 400 drives the stop member 520 toward the infusion tube via the motor drive rod 510, thereby squeezing the infusion tube to form a stop.

[0111] Optionally, the mechanical transmission component 500 also includes a motor bracket 530 for mounting the DC motor 400. The infusion tube shut-off control device also includes a switch button 140, which powers on all modules inside the infusion tube shut-off control device when pressed by the user.

[0112] Furthermore, since the cut-off element 520 is located inside the cavity (i.e., inside the housing 100), the user cannot directly see the cut-off state of the infusion tube. Therefore, in this embodiment, the infusion tube cut-off control device also includes a light guide column 600.

[0113] The light guide post 600 is disposed within the receiving cavity formed by the first housing 110 and the second housing 120, and the light guide post 600 penetrates the first housing 110. The light guide post 600 and the stop member 520 are disposed opposite each other on both sides of the groove 130. Furthermore, the light guide post 600 is controlled by the main control circuit 300 to indicate that the infusion tube is in a stopped state.

[0114] Since the light guide post 600 and the cut-off member 520 are positioned opposite each other on both sides of the groove 130 (where the infusion tube is placed), the light intensity emitted by the light guide post 600 when the cut-off member 520 cuts off the infusion tube is different from the light intensity emitted when the cut-off member 520 does not cut off the infusion tube. Therefore, the user can directly observe the cut-off state of the infusion tube by observing the light intensity emitted by the light guide post 600 exposed on the first housing 110. That is, in this embodiment, the light guide post 600 is used to indicate the cut-off state of the infusion tube. For example, when the infusion tube is cut off by the cut-off member 520, the light intensity emitted by the light guide post 600 is weaker. When the infusion tube is not cut off by the cut-off member 520, the light intensity emitted by the light guide post 600 is stronger.

[0115] Furthermore, this embodiment also provides an infusion tube shut-off circuit, including:

[0116] An infrared detection circuit is installed at the infusion tube and outputs a detection signal when no liquid is detected in the infusion tube.

[0117] The main control circuit is electrically connected to the infrared detection circuit to output a cutoff pulse signal to the DC motor used to cut off the infusion tube based on the detection signal.

[0118] Optionally, the cutoff pulse signal includes a turn-off pulse and a continuous cutoff pulse. Furthermore, the duty cycle of the turn-off pulse is greater than that of the continuous cutoff pulse.

[0119] As one feasible implementation, the infrared detection circuit includes an infrared emitting module and an infrared receiving module. The infrared receiving module is electrically connected to the main control circuit, and the infrared emitting module and the infrared receiving module are positioned opposite each other on both sides of the infusion tube to form a counter-emitting pattern.

[0120] In addition, the infusion tube shut-off circuit also includes an amplifier circuit and a comparator circuit that are electrically connected in sequence to the infrared detection circuit. The output of the comparator circuit is electrically connected to the input of the main control module, and the main control module controls the DC motor through a DC motor drive circuit.

[0121] Furthermore, this embodiment also provides an infusion alarm, including: a DC motor, a mechanical transmission component, and an infusion tube shut-off circuit as described in any of the foregoing embodiments.

[0122] The infusion tube shut-off circuit outputs a shut-off pulse signal to control the DC motor. The mechanical transmission components are driven by the DC motor to shut off the infusion tube.

[0123] In summary, this embodiment provides an infusion tube shut-off control device, circuit, and infusion alarm, including: a housing, and an infrared detection circuit, a main control circuit, a DC motor, and a mechanical transmission component located inside the housing. The surface of the housing has a groove for accommodating the infusion tube, and the groove communicates with the interior of the housing. The infrared detection circuit and the mechanical transmission component are both located near the groove. The input terminal of the main control circuit is electrically connected to the output terminal of the infrared detection circuit, and the output terminal of the main control circuit is electrically connected to the input terminal of the DC motor.

[0124] The infrared detection circuit outputs a detection signal when no liquid is detected in the infusion tube. The main control circuit outputs a cutoff pulse signal based on the detection signal to drive the DC motor and mechanical transmission components to cut off the infusion tube.

[0125] Furthermore, the cutoff pulse signal includes a turn-off pulse and a continuous cutoff pulse. The turn-off pulse has a longer duty cycle than the continuous cutoff pulse. Thus, the turn-off pulse allows for rapid control of the DC motor to shut off the infusion tubing, while the continuous cutoff pulse provides intermittent rotational control to the DC motor, ensuring the infusion tubing does not spring back.

[0126] By placing the light guide post within the cavity formed by the first and second housings, with the light guide post penetrating the first housing, and the light guide post and the stopper positioned opposite each other on both sides of the groove, the user can determine whether the infusion tube has been properly stopped based on the intensity of the light emitted by the light guide post.

[0127] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

[0128] It will be apparent to those skilled in the art that this embodiment is not limited to the details of the exemplary embodiments described above, and that this embodiment can be implemented in other specific forms without departing from the spirit or essential characteristics of this embodiment. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this embodiment is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this embodiment. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An infusion tube shut-off control device, characterized in that, It includes: a housing, and an infrared detection circuit, a main control circuit, a DC motor, and mechanical transmission components located inside the housing; wherein, The surface of the housing has a groove for accommodating the infusion tube, and the groove communicates with the interior of the housing. The infrared detection circuit and the mechanical transmission component are both located near the groove; and... The input terminal of the main control circuit is electrically connected to the output terminal of the infrared detection circuit, and the output terminal of the main control circuit is electrically connected to the input terminal of the DC motor. The infrared detection circuit is used to output a detection signal when it detects that there is no liquid in the infusion tube; The main control circuit is used to output a cutoff pulse signal according to the detection signal, so as to drive the DC motor to drive the mechanical transmission component to cut off the infusion tube; The infrared detection circuit includes an infrared emitting module and an infrared receiving module disposed opposite to each other on both sides of the groove to form a counter-emitting pattern; The infrared receiving module is electrically connected to the main control circuit to output the detection signal.

2. The infusion tube shut-off control device according to claim 1, characterized in that, It also includes an amplifier circuit, the input terminal of which is electrically connected to the output terminal of the infrared detection circuit; wherein, The amplifier circuit includes an operational amplifier, a first input capacitor, an RC filter module, a first feedback resistor, a second feedback resistor, and a second feedback capacitor; The non-inverting input terminal of the operational amplifier is electrically connected to the output terminal of the infrared detection circuit through the first input capacitor, and the non-inverting input terminal of the operational amplifier is connected to the RC filter module to ground. The inverting input terminal of the operational amplifier is connected to ground by the first feedback resistor, and the inverting input terminal of the operational amplifier is also electrically connected to one end of the second feedback resistor and one end of the second feedback capacitor, respectively. The other ends of the second feedback resistor and the second feedback capacitor are both electrically connected to the output terminal of the operational amplifier.

3. The infusion tube shut-off control device according to claim 2, characterized in that, It also includes a comparator circuit, the input of which is electrically connected to the output of the amplifier circuit, and the output of which is electrically connected to the input of the main control circuit. The comparison circuit includes a comparator, a third voltage divider resistor, a fourth voltage divider resistor, a fifth feedback resistor, and a sixth feedback resistor. The non-inverting input of the comparator is connected to the output of the operational amplifier; The inverting input terminal of the comparator is electrically connected to one end of the third voltage divider resistor and one end of the fourth voltage divider resistor, respectively. The other end of the third voltage divider resistor is connected to the first reference power supply, and the other end of the fourth voltage divider resistor is grounded. The output terminal of the comparator is electrically connected to one end of the fifth feedback resistor and the sixth feedback resistor, respectively. The other end of the fifth feedback resistor is connected to the first reference power supply, and the other end of the sixth feedback resistor is electrically connected to the input terminal of the main control circuit.

4. The infusion tube shut-off control device according to claim 1, characterized in that, It also includes a DC motor drive circuit, the input terminal of which is electrically connected to the output terminal of the main control circuit, and the output terminal of which is electrically connected to the input terminal of the DC motor. The DC motor drive circuit includes a DC motor drive chip, a seventh resistor, and a third filter capacitor. The power supply terminal of the DC motor drive chip is connected to the second reference power supply through the seventh resistor, and the power supply terminal of the DC motor drive chip is also grounded through the third filter capacitor. The first input terminal and the second input terminal of the DC motor driver chip are electrically connected to the first output terminal and the second output terminal of the main control circuit, respectively, and the first output terminal and the second output terminal of the DC motor driver chip are electrically connected to the first input terminal and the second input terminal of the DC motor, respectively.

5. The infusion tube shut-off control device according to claim 1, characterized in that, It also includes an alarm circuit, the input of which is connected to the output of the main control circuit; The main control circuit is used to send an alarm signal to the alarm circuit based on the detection signal, so that the alarm circuit will sound an alarm when there is no liquid in the infusion tube.

6. The infusion tube shut-off control device according to claim 1, characterized in that, The housing includes a first housing and a second housing; The first housing and the second housing are fastened together to form a receiving cavity, and the infrared detection circuit, the main control circuit, the DC motor, and the mechanical transmission components are all disposed within the receiving cavity; and... The groove is disposed on the surface of the first housing, and the length of the groove is the same as the length of the first housing, and the depth of the groove is the same as the height of the first housing.

7. The infusion tube shut-off control device according to claim 6, characterized in that, The mechanical transmission components include a motor drive rod and a stop element; The DC motor drives the stopper to move toward the infusion tube side via the motor transmission rod, thereby squeezing the infusion tube to form a stop.

8. The infusion tube shut-off control device according to claim 7, characterized in that, It also includes light guide columns; The light guide post is disposed within the receiving cavity formed by the first housing and the second housing, and the light guide post penetrates the first housing. The light guide post and the cut-off member are disposed opposite each other on both sides of the groove; and, The light guide column is controlled by the main control circuit to indicate that the infusion tube is in a cut-off state.

9. The infusion tube shut-off control device according to claim 1, characterized in that, The cutoff pulse signal includes: a turn-off pulse and a continuous cutoff pulse; wherein... The duty cycle of the shutdown pulse is greater than that of the continuous cutoff pulse.

10. A circuit for cutting off an infusion tube, characterized in that, include: An infrared detection circuit is installed at the infusion tube and outputs a detection signal when no liquid is detected in the infusion tube. The main control circuit is electrically connected to the infrared detection circuit to output a cutoff pulse signal to the DC motor for cutting off the infusion tube according to the detection signal; The infrared detection circuit includes an infrared emitting module and an infrared receiving module; The infrared receiving module is electrically connected to the main control circuit, and the infrared emitting module and the infrared receiving module are arranged opposite each other on both sides of the infusion tube to form a counter-emitting pattern.

11. The infusion tube shut-off circuit according to claim 10, characterized in that, Also includes: An amplifier circuit and a comparator circuit are electrically connected in sequence to the infrared detection circuit, wherein... The output terminal of the comparator circuit is electrically connected to the input terminal of the main control module; The main control module controls the DC motor through a DC motor drive circuit.

12. The infusion tube shut-off circuit according to claim 10, characterized in that, The cutoff pulse signal includes: a turn-off pulse and a continuous cutoff pulse; wherein... The duty cycle of the shutdown pulse is greater than that of the continuous cutoff pulse.

13. An infusion alarm device, characterized in that, include: DC motor; and The mechanical transmission component, driven by the DC motor, is used to shut off the infusion tube. as well as The infusion tube cutoff circuit as described in any one of claims 10-12 outputs a cutoff pulse signal to control the DC motor.

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