Portable infusion end-point safety clamp

Abstract

This invention discloses a portable infusion endpoint safety clip, belonging to the field of medical device technology. The safety clip includes a shell, mounting structure, endpoint detection module, audible alarm module, tubing clamping module, button battery, and accidental clamping protection structure, all employing a miniaturized, independent structural design. The device achieves rapid external assembly of the infusion tubing through a one-step snap-fit ​​installation structure, without damaging the tubing structure. The detection module identifies the tubing's fluid depletion status in real time, simultaneously triggering the audible alarm module to sound an alarm and the tubing clamping module to automatically block the tubing. The device is independently powered by a button battery, adaptable to various infusion scenarios. An accidental clamping protection structure is also included to prevent accidental activation when not in use. This invention is compact, portable, easy to install, safe, and reliable, effectively preventing air embolism and backflow problems during infusion.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a portable infusion endpoint safety clip. Background Technology

[0002] Intravenous infusion is one of the most commonly used methods of drug administration in clinical treatment, and it is widely used in hospital wards, community clinics, and home care. During gravity-feed intravenous infusion, if the medication in the infusion container is finished and not detected and dealt with in time, air can enter the infusion line, posing a safety risk of air embolism. At the same time, when the venous pressure is higher than the tubing pressure, blood can flow back into the infusion line, causing blockage and discomfort to the patient.

[0003] Currently, the determination of the endpoint of intravenous infusion in clinical practice mostly relies on the patient, family members, or medical staff to visually observe the liquid level in the infusion container. This method has obvious drawbacks: First, it requires continuous attention from personnel, and it is easy to overlook when infusion is performed at night, when no one is accompanying the patient, or when the patient's attention is distracted; second, it is difficult for elderly patients with poor vision or limited mobility to observe and operate on their own; third, there is a response delay when manually closing the flow regulator, making it difficult to completely cut off the tubing at the moment the infusion is finished.

[0004] To address the shortcomings of manual observation, various infusion endpoint alarm devices have emerged in the existing technology. For example, Chinese utility model patent CN202078612U discloses an infusion endpoint alarm device that uses a photoelectric detection scheme combining near-infrared light-emitting diodes and photodiodes, installed on the side of a Murphy drip chamber, triggering an alarm when the infusion has stopped flowing. However, this type of device only has an audible alarm function and cannot automatically close the infusion line at the same time as the alarm sounds. When the patient is asleep, the caregiver is temporarily away, or the alarm is not responded to in time, air entering the tubing and backflow of blood cannot be avoided, resulting in limited safety protection capabilities.

[0005] On the other hand, while medical infusion pumps and intelligent infusion monitoring systems can provide alarms when the infusion is low and automatically stop the infusion, these devices are bulky, expensive to purchase and use, and typically require an external AC power source. They are only suitable for centralized monitoring scenarios such as hospital intensive care units, and cannot meet the needs of decentralized, low-resource scenarios such as home infusions, community clinics, and outdoor transport. Furthermore, most existing infusion monitoring devices are complex to install and operate, requiring procedures such as threading infusion tubing and aligning and adjusting sensors, demanding certain professional knowledge from users, making them inconvenient for ordinary patients or their families to carry and use themselves. Summary of the Invention

[0006] I. Technical problems to be solved The purpose of this invention is to address the aforementioned deficiencies of the prior art by providing a portable infusion endpoint safety clamp, which solves the problems of existing infusion monitoring devices having limited functions, only alarming without automatic clamping, large size and high cost, complex installation and operation, and being unsuitable for out-of-hospital scenarios. This invention achieves integrated endpoint detection, audible alarm, and automatic tubing clamping, while also being portable, easy to use, independently operable, safe, and reliable. Technical solution

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A portable infusion endpoint safety clip includes a housing, a mounting structure, an endpoint detection module, an audible alarm module, a tubing clamping module, a button battery, and an accidental clamping protection structure.

[0008] The housing serves as the main load-bearing structure of the device, accommodating and securing various functional modules and electrical components. The overall design is miniaturized for portability. An mounting structure is provided on the housing, allowing the entire safety clamp to be detachably fixed to the outer wall of the infusion tubing without compromising the integrity of the original tubing, thus achieving external installation.

[0009] The endpoint detection module is installed inside the housing, corresponding to the installation position of the infusion tubing. It is used to monitor the liquid flow status inside the infusion tubing in real time. When it detects that the liquid has run out or an air segment appears in the tubing, it outputs a corresponding trigger signal. Within a wide protection range, the endpoint detection module can employ any one or more combinations of photoelectric sensors, capacitive sensors, or conductivity sensors to identify the liquid exhaustion state through different detection principles: photoelectric sensors can detect the liquid exhaustion state by utilizing the difference in light transmittance between liquid and air; capacitive sensors can detect the liquid exhaustion state by utilizing the difference in dielectric constant between liquid and air; and conductivity sensors can detect the liquid exhaustion state by utilizing the difference in conductivity between liquid and air. Multiple detection schemes can adapt to different application scenarios and cost requirements.

[0010] The audible alarm module is installed inside the housing and electrically connected to the endpoint detection module. It receives the trigger signal output by the endpoint detection module and emits a continuous audible alarm upon receiving the trigger signal to remind nearby personnel that the infusion has reached its endpoint. The audible alarm module can use a piezoelectric buzzer or a miniature electromagnetic speaker, controlling its size and power consumption while ensuring sufficient volume, and is compatible with the power supply of button batteries.

[0011] The tubing clamping module is installed inside the housing and electrically connected to the endpoint detection module. It receives trigger signals from the endpoint detection module and, upon triggering, mechanically squeezes the infusion tubing to completely seal the inner wall, thus blocking the fluid flow and preventing air from entering the tubing, while also preventing venous backflow. Within a wide protection range, the tubing clamping module includes a drive component and a clamping component. The drive component can be any one of a micro motor, electromagnet, or shape memory alloy actuator. Driven by electrical energy, it generates mechanical displacement, moving the clamping component from an open position away from the tubing to a closed position that squeezes the tubing, ultimately achieving complete tubing clamping. Each of the three drive methods has its advantages: micro motor drives offer good stability and controllable clamping force; electromagnet drives have fast response speed and simple structure; and shape memory alloy actuators are small in size and quiet, allowing for flexible selection based on product positioning.

[0012] The button battery is installed in the battery compartment inside the casing and is electrically connected to the endpoint detection module, the audible alarm module, and the pipeline clamping module, providing a unified power supply for all power-consuming modules. Using a button battery for power eliminates the need for an external power cord and charging circuit, greatly improving the device's portability and adaptability to various scenarios. It can operate independently in outdoor or transport environments without an external power source. Furthermore, the small size and low cost of the button battery help control the overall product size and production costs.

[0013] The accidental clamping protection structure is located between the housing and the mounting structure. It is used to limit the triggering of the tubing clamping module when the safety clamp is not correctly installed on the infusion tubing and is not in operation. This prevents the device from accidentally activating the clamping function during storage or transport due to accidental contact or interference signals, thus preventing damage to the clamping components or accidental pinching injuries. Within a wide protection range, the accidental clamping protection structure can employ either a mechanical interlocking device or an electrical interlocking circuit: mechanical interlocking achieves locking through physical engagement, offering high reliability and being unaffected by circuit failures; electrical interlocking blocks signals by switching the circuit on and off, offering high integration and ease of assembly.

[0014] Furthermore, the installation structure is a one-step snap-fit ​​structure, including an elastic groove adapted to the outer diameter of the infusion tubing. The opening width of the elastic groove is slightly smaller than the outer diameter of the infusion tubing, and the sidewall of the groove has elastic deformation capability. During installation, the user only needs to align the infusion tubing with the groove opening and press radially to snap the tubing into the groove for fixation. No additional tools or professional operating skills are required, achieving one-step quick installation. The elastic groove can be equipped with a locking mechanism to further improve the reliability of the fixation after installation and prevent the device from falling off the tubing during use.

[0015] Furthermore, the housing adopts a waterproof structure design with a protection level of no less than IPX4, which can withstand liquid splashes during daily use and prevent medications, sweat, etc. from entering the housing and causing short circuits, thereby improving the safety and lifespan of the device in medical settings. Installation direction indicators can be set on the outer surface of the housing to guide users to install the device in the correct direction, ensuring that the detection module and clamping module are aligned with the pipeline position, and avoiding detection failure or incomplete clamping due to reverse installation.

[0016] Furthermore, the safety clip is a non-networked, independently operating device without an internal wireless communication module. All functions are detected and executed locally, without relying on a network environment or a host computer. This reduces device cost and power consumption, avoids functional failures caused by poor network signals, and alleviates patients' concerns about information security. Beneficial effects

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Highly integrated functions and strong safety protection capabilities. This device integrates three functions: endpoint detection, audible alarm, and automatic pipeline clamping. When the liquid level is reached, the alarm and pipeline clamping are triggered simultaneously. Even if no one responds to the alarm in time, physical blocking can prevent air entry and backflow of blood. Compared with existing devices that only have alarm functions, the level of safety protection is significantly improved.

[0018] 2. Excellent portability and independence. Powered by a single button battery, it requires no external power source, no charging, and no network connection. The device is compact and can be carried by the patient. It is suitable for various scenarios such as hospital wards, home infusion, community clinics, and outdoor transport, breaking through the scenario limitations of existing infusion monitoring equipment.

[0019] 3. Easy to operate and suitable for non-professional users. Adopting a one-step snap-fit ​​installation structure, users do not need professional knowledge or tools; simply pressing is sufficient to secure the device to the infusion line, significantly lowering the barrier to entry and making it suitable for ordinary patients and their families to operate independently.

[0020] 4. High safety and reliability. Equipped with an accidental clamping protection structure, it prevents accidental triggering in non-working states from a mechanical or electrical perspective, eliminating safety hazards during carrying and storage; the external installation does not come into contact with the medication, so it will not cause contamination during the infusion process and complies with medical use standards. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the portable infusion endpoint safety clip in Example 1.

[0022] Figure 2 This is a schematic diagram of the portable infusion endpoint safety clip in Example 1.

[0023] Figure 3 This is an enlarged view of the pipeline clamping module before it is triggered in the open state in Example 1.

[0024] Figure 4 This is an enlarged view of the closed state of the pipeline clamping module in Example 1 after it is triggered.

[0025] Figure 5 This is a schematic diagram of the one-step installation process in Example 1.

[0026] Figure 6 This is a partial enlarged view of the mechanical interlock device in Example 1.

[0027] Figure 7 This is the electrical interlock circuit diagram in Example 1.

[0028] The diagram is labeled as follows: 1. Housing; 2. One-step installation structure; 2a. Elastic slot; 2b. Locking mechanism; 3. End point detection module; 4. Audible alarm module; 5. Tube clamping module; 5a. Eccentric cam; 5b. Transmission link; 5c. Slider; 6. Button battery; 7. Accidental clamping protection structure; 7a. Interlock switch; 7b. Trigger protrusion; 8. Infusion tubing; 9. Clamping component; 10. Output shaft; 11. Limit switch; 12. Return spring; 13. Installation direction indicator mark. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the embodiments of the present invention, "multiple" means at least two.

[0033] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0034] The present invention will now be described in detail and specifically through specific embodiments to enable a better understanding of the invention. However, the following embodiments do not limit the scope of protection of the present invention. Example 1

[0035] Reference Figures 1 to 6 As shown, this embodiment is a preferred embodiment of the present invention, employing a complete technical solution of photoelectric detection, micro-motor driven clamping, and mechanical interlocking for false alarm protection.

[0036] The housing 1 is injection molded from medical-grade ABS plastic, and is a long, narrow, small housing for easy hand-holding and carrying. The housing 1 has multiple partitioned cavities inside, used to secure various functional modules and electrical components, preventing interference between parts. The side walls of the housing 1 have several arrayed sound holes corresponding to the position of the audible alarm module 4, ensuring that the alarm sound can be effectively transmitted to the external environment. The upper and lower cover joints of the housing 1 are equipped with an annular sealing rib, which, together with a sealing ring, achieves a waterproof effect, with an overall protection level of IPX4, resisting everyday splashes of medicine and moisture corrosion. The outer surface of the housing 1 is printed with installation direction indicator marks 13, marked in the shape of arrows with accompanying text prompts, guiding the user to install the device in the correct direction and ensuring that the detection optical path and clamping mechanism are aligned with the pipeline.

[0037] like Figure 5 , Figure 6As shown, the one-step mounting structure 2 is integrally formed on one side wall of the housing 1, and includes an elastic clamping slot 2a and a locking mechanism 2b. The elastic clamping slot 2a is a U-shaped through slot extending along the length direction of the housing 1, the inner diameter of the slot is adapted to the outer diameter of a conventional infusion line 8, and the opening width of the clamping slot is slightly smaller than the outer diameter of the infusion line 8. The two side walls of the clamping slot are designed with a thin-walled elastic structure, which has a certain radial elastic deformation capability; when the infusion line 8 is aligned with the opening and a pressing force is applied, the opening of the clamping slot is squeezed and elastically expanded, and after the line is completely snapped in, the side walls of the clamping slot rebound to radially limit the line in the slot. The locking mechanism 2b is an elastic buckle structure arranged at the opening of the clamping slot. After the line is snapped in, the buckle automatically closes, further restricting the line from coming off from the opening direction, and improving the firmness after installation. The entire installation process does not require any tools, and the user can complete the operation with one hand, truly realizing one-step quick installation.

[0038] The end point detection module 3 adopts a photoelectric sensor, which is fixedly mounted on a mounting seat inside the housing 1, and its position corresponds to the middle section area of the elastic clamping slot 2a. The photoelectric sensor includes an infrared emitting tube and an infrared receiving tube, which are respectively arranged on the left and right sides of the elastic clamping slot 2a, and their optical path axes coincide and are perpendicular to the axis of the infusion line 8. During operation, the infrared emitting tube continuously emits infrared light of a fixed wavelength, and the light passes through the tube wall of the infusion line 8 and the medium inside the line before being received by the infrared receiving tube on the opposite side; when the line is full of medicinal liquid, the liquid has a strong refraction and absorption effect on the infrared light, and the light intensity received by the infrared receiving tube is at a relatively low level; when the liquid in the line is exhausted and this section is filled with air, the light transmission loss is greatly reduced, and the light intensity received by the infrared receiving tube will increase significantly. The signal processing circuit matched with the sensor judges the liquid exhaustion state according to the sudden change of light intensity, and outputs a stable trigger signal. The photoelectric detection method is non-contact detection, does not directly contact with the medicinal liquid, will not cause medicinal liquid pollution, and has high detection precision and fast response speed.

[0039] The sound alarm module 4 adopts a piezoelectric buzzer, which is fixedly mounted at the upper end position inside the housing 1 through a buckle, and the sound-emitting surface of the buzzer is aligned with the sound outlet of the housing 1. The power supply end of the piezoelectric buzzer is connected to the output end of the button battery 6, and the control end is connected to the signal output end of the end point detection module 3; when receiving the trigger signal, the buzzer is energized to emit a continuous buzzer alarm sound, with an effective alarm volume of no less than 60 decibels, which can be clearly heard in a general ward environment.

[0040] As Figure 3 , Figure 4As shown, the pipeline clamping module 5 is located on one side of the elastic slot 2a and adopts an eccentric cam transmission scheme driven by a micro motor. It includes a micro motor, an eccentric cam 5a, a transmission link 5b, a slider 5c, a clamping component 9, a limit switch 11, and a return spring 12. The micro motor is fixedly mounted on the motor mounting base of the housing 1 with screws, and its output shaft 10 is coaxially fixedly connected to the eccentric cam 5a. The edge convex shaft of the eccentric cam 5a is hinged to one end of the transmission link 5b through a pin, and the other end of the transmission link 5b is hinged to the tail of the slider 5c. The slider 5c is slidably mounted on a horizontal slide rail inside the housing 1 and can slide back and forth in a direction perpendicular to the axis of the infusion pipeline 8. The clamping component 9 is fixed at the end of the slider 5c facing the infusion pipeline 8. The squeezing end face of the clamping component 9 is an arc surface adapted to the outer wall of the pipeline to ensure that the pipeline is subjected to uniform force and reliable blocking when clamped. Limit switch 11 is set at the end of the stroke of slider 5c, corresponding to the position where clamping member 9 is fully closed; return spring 12 is sleeved on the guide rod of slider 5c, with its two ends abutting against slider 5c and the inner wall of the housing respectively, and always applying a return force to slider 5c in the direction away from the pipeline.

[0041] When the endpoint detection module 3 outputs a trigger signal, the micro motor is powered on and begins to rotate. This rotation drives the eccentric cam 5a to rotate synchronously via the output shaft 10. The eccentric cam 5a converts the rotational motion into linear thrust through the transmission link 5b, pushing the slider 5c to slide along the slide rail towards the infusion tubing 8. This, in turn, causes the clamping member 9 to smoothly compress the side wall of the infusion tubing 8. When the clamping member 9 moves to the closed position, the infusion tubing 8 is completely flattened, and the fluid passage inside the tubing is completely blocked. At this time, the tail of the slider 5c touches the limit switch 11, which cuts off the power supply to the micro motor. The motor stops rotating and remains in its current position, maintaining the tubing blockage. When it is necessary to release the clamp, the slider 5c can be manually pushed back to its open position using the reset button on the housing 1. The reset spring 12 assists the clamping member 9 in returning to the open position, facilitating removal or reuse of the device.

[0042] The button battery 6 is a CR2032 lithium manganese button battery, installed in an independent battery compartment inside the housing 1. The battery compartment has an openable, sealed cover for easy battery replacement by the user. The positive and negative terminals of the button battery 6 are connected to the power supply pins of each power module via conductive contacts, providing a unified DC power supply for the endpoint detection module 3, the audible alarm module 4, and the tubing clamping module 5. A single button battery can support the device to complete dozens of complete detection-alarm-clamping cycles, meeting the power requirements for multiple infusion uses.

[0043] like Figure 6As shown, the mis-clamping protection structure 7 is a mechanical interlock device, located at the junction of the one-step installation structure 2 and the housing 1, including an interlock switch 7a and a trigger protrusion 7b. The interlock switch 7a is a normally closed micro switch, connected in series in the main power supply circuit of the pipeline clamping module 5; the trigger protrusion 7b is located at the bottom of the elastic slot 2a and can move slightly radially. When no pipeline is installed, the trigger protrusion 7b protrudes into the slot, the interlock switch 7a is in the open state, and the power supply circuit of the pipeline clamping module 5 is physically cut off. Even if there is electromagnetic interference or a circuit malfunction, the clamping action cannot be triggered. When the infusion pipeline 8 is correctly inserted into the elastic slot 2a, the outer wall of the pipeline presses the trigger protrusion 7b, the trigger protrusion 7b moves into the housing 1 and presses the button of the interlock switch 7a, causing the interlock switch 7a to close, the power supply circuit of the pipeline clamping module 5 to be connected, and the device enters the normal working state, and can respond to the trigger signal to perform the clamping action. This mechanical interlock structure ensures that the clamping function will only take effect when the device is correctly installed on the infusion line, effectively avoiding accidental triggering during storage and transport.

[0044] The complete working process of this embodiment is as follows: Installation device: The user refers to the installation direction indicator mark 13, aligns the infusion tubing 8 with the opening of the elastic slot 2a of the one-step installation structure 2, and presses it radially to make the tubing snap into the slot. The locking mechanism 2b locks automatically. After installation, the infusion tubing 8 presses to trigger the protrusion 7b, which pushes the interlock switch 7a to close, and the device is powered on and enters the standby monitoring state.

[0045] Real-time monitoring: The infrared emitting tube of the endpoint detection module 3 continuously emits infrared light, the infrared receiving tube detects the light transmission intensity in real time, and the back-end circuit continuously compares the light intensity threshold to determine the liquid state in the pipeline.

[0046] Trigger Response: When the liquid in the infusion line 8 has drained and the air section reaches the detection position, the light intensity received by the infrared receiver tube reaches the preset threshold, and the endpoint detection module 3 outputs a stable trigger signal.

[0047] Synchronous action: The trigger signal is divided into two paths. One path is transmitted to the sound alarm module 4, which activates the piezoelectric buzzer to emit a continuous sound alarm. The other path is transmitted to the pipeline clamping module 5, which powers and starts the micro motor, which pushes the clamping member 9 to squeeze the infusion pipeline 8 through the transmission mechanism.

[0048] Clamping retention: When the clamping member 9 moves to the position of completely blocking the pipeline, the limit switch 11 is triggered, cutting off the power supply to the micro motor. The clamping member 9 remains in the closed position, continuously blocking the pipeline and preventing air from entering and blood from returning.

[0049] Reset Operation: After medical staff arrive and complete the treatment, press the reset button. The clamping part 9 returns to the open position under the action of the reset spring 12, and the device can be removed from the infusion line. After the device is removed, the protrusion 7b is triggered to reset, the interlock switch 7a is opened, and the device returns to the non-working locked state. Example 2

[0050] This embodiment has a similar main structure to Embodiment 1, the difference being the driving method of the pipe clamping module 5. In this embodiment, the pipe clamping module 5 adopts an electromagnet driving scheme, including an electromagnet core, an armature, a clamping component 9, and a return spring 12. The electromagnet is fixedly installed on a mounting base inside the housing 1, the armature and the clamping component 9 are fixedly connected as one unit, and the return spring 12 is disposed between the armature and the end face of the electromagnet, always applying a spring force away from the electromagnet to the armature.

[0051] When the trigger signal from the endpoint detection module 3 is received, the electromagnet's coil is energized, generating magnetic force that attracts the armature, causing it to move towards the electromagnet. Simultaneously, this drives the clamping component 9 to squeeze the infusion tubing 8, achieving tubing clamping. After the tubing is blocked, the electromagnet can continue to be energized to maintain the clamped state. When the power is cut off, the coil's magnetic force disappears, and the return spring 12 pushes the armature and clamping component 9 back to their original positions, releasing the tubing clamp. This embodiment of the tubing clamping module has a simpler structure, fewer parts, lower assembly costs, and a faster energization response, making it suitable for cost-sensitive applications requiring rapid clamping. Example 3

[0052] like Figure 7 As shown, the main structure of this embodiment is basically the same as that of Embodiment 1, the difference being the implementation method of the mis-clamping protection structure 7. In this embodiment, the mis-clamping protection structure 7 is an electrical interlock circuit. An installation detection switch is provided at the bottom of the groove of the one-step installation structure 2. The installation detection switch is electrically connected to the electrical interlock circuit, which is connected in series in the signal transmission loop between the endpoint detection module 3 and the pipeline clamping module 5.

[0053] When the device is not installed on the infusion line, the installation detection switch is in the open state, and the electrical interlock circuit blocks the transmission path of the trigger signal. Even if the endpoint detection module 3 outputs a false signal due to interference, it cannot be transmitted to the tubing clamping module 5, and the clamping action will not be triggered. When the device is correctly installed on the infusion line, the installation detection switch is pressed against the outer wall of the tubing to close it, the electrical interlock circuit is activated, and the trigger signal can be transmitted normally to the tubing clamping module 5, and the device enters the working state. The electrical interlock scheme of this embodiment does not require a complex mechanical linkage structure, and the internal layout of the housing is more flexible, which facilitates further reduction in the size of the device.

[0054] The specific embodiments of the present invention have been described in detail above, but they are merely examples, and the present invention is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, all equivalent transformations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A portable infusion endpoint safety clip, comprising a housing (1), wherein the housing (1) is provided with a one-step mounting structure (2) for mounting on an infusion line (8), and wherein an endpoint detection module (3) and an audible alarm module (4) are disposed within the housing (1), wherein the endpoint detection module (3) is used to detect the state of complete fluid flow in the infusion line (8), characterized in that: The housing (1) is also provided with a tubing clamping module (5) and a button battery (6). The button battery (6) is electrically connected to the endpoint detection module (3), the audible alarm module (4), and the tubing clamping module (5) for unified power supply. The tubing clamping module (5) is electrically connected to the endpoint detection module (3) and can clamp the infusion tubing (8) in response to the trigger signal output by the endpoint detection module (3). A mis-clamping protection structure (7) is provided between the housing (1) and the one-step installation structure (2). The mis-clamping protection structure (7) is used to restrict the triggering action of the tubing clamping module (5) when the safety clamp is not installed on the infusion tubing (8).

2. The portable infusion endpoint safety clip according to claim 1, characterized in that: The endpoint detection module (3) is one or more of a photoelectric sensor, a capacitance sensor, or a conductivity sensor.

3. The portable infusion endpoint safety clip according to claim 2, characterized in that: The endpoint detection module (3) is a photoelectric sensor, including an infrared emitting tube and an infrared receiving tube respectively located on both sides of the infusion pipeline (8).

4. The portable infusion endpoint safety clip according to claim 1, characterized in that: The pipeline clamping module (5) includes a driving component and a clamping component (9). The driving component is one of a micro motor, an electromagnet, or a shape memory alloy actuator. The driving component drives the clamping component (9) to squeeze the infusion pipeline (8) to achieve pipeline blockage.

5. The portable infusion endpoint safety clip according to claim 4, characterized in that: The driving component is a micro motor, and the output shaft (10) of the micro motor is connected to a transmission mechanism. The transmission mechanism is an eccentric cam (5a) mechanism or a lead screw and nut mechanism, and the output end of the transmission mechanism is connected to the clamping component (9).

6. The portable infusion endpoint safety clip according to claim 1, characterized in that: The one-step installation structure (2) is a one-step snap-fit ​​structure, including an elastic slot (2a) that is adapted to the outer diameter of the infusion line (8). The opening width of the elastic slot (2a) is smaller than the outer diameter of the infusion line (8), and the infusion line (8) can be elastically snapped into the elastic slot (2a) through the opening.

7. The portable infusion endpoint safety clip according to claim 1, characterized in that: The mis-clamp protection structure (7) is a mechanical interlock device, including a trigger protrusion (7b) on the one-step installation structure (2) and an interlock switch (7a) in the housing (1). The trigger protrusion (7b) can press the interlock switch (7a) when the safety clamp is installed in place on the infusion line (8) to release the mechanical lock on the line clamping module (5).

8. The portable infusion endpoint safety clip according to claim 1, characterized in that: The housing (1) is a waterproof housing with a protection level of not less than IPX4.

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