Liquid stopping device and infusion pump

Abstract

The utility model discloses a liquid stopping device and an infusion pump, and relates to the technical field of infusion pumps, the liquid stopping device comprises a main machine front shell, a liquid stopping clamping rod, a driving mechanism and a front door assembly; the main machine front shell is provided with an infusion tube groove and a limiting protruding block, and an infusion tube is provided with an installation position for correct installation and a misinstallation position for staggered installation. The liquid stopping clamping rod is used for being matched with the limiting protruding block. The driving mechanism is in driving connection with the liquid stopping clamping rod; the front door assembly is provided with a liquid stopping structure, and the liquid stopping structure is used for being matched with the liquid stopping clamping rod and the limiting protruding block so as to limit flowing of liquid in the infusion tube when the infusion tube is in a mistaken installation position. According to the technical scheme, the liquid stopping structure capable of being matched with the liquid stopping clamping rod is arranged in the front door assembly of the liquid stopping device, and after the front door assembly covers the main machine front shell, the liquid stopping structure can be matched with the liquid stopping clamping rod and the limiting protruding block; under the condition that rotation of the liquid stopping clamping rod is not affected, liquid stopping is achieved on the infusion tube in the mistaken installation position.

Description

Technical Field

[0001] The utility model relates to the technical field of infusion pumps, in particular to a liquid stopping device and an infusion pump. Background Art

[0002] An infusion pump is an automated control device that controls the infusion rate by acting on the infusion tubing. They are often used in situations where strict control of infusion volume and medication dosage is required, such as when administering pressor medications, antiarrhythmic drugs, intravenous infusions for infants, or intravenous anesthesia. Existing medical infusion pumps often experience free flow when the infusion tubing is incorrectly clamped and not recognized within the pump. This prevents the tubing from being intercepted within the pump, ultimately resulting in poor infusion accuracy. Utility Model Content

[0003] The main purpose of the utility model is to provide a liquid stopping device and an infusion pump, which are intended to stop the liquid in an infusion tube that is in an incorrect clamping position to avoid the free flow phenomenon.

[0004] To achieve the above-mentioned purpose, the liquid-stopping device proposed in the present invention includes: a main body front shell, a liquid-stopping clamping rod, a driving mechanism and a front door assembly; the main body front shell has an infusion tube groove for installing an infusion tube, and a limiting protrusion arranged on the extension path of the infusion tube groove, and the infusion tube has a correctly installed installation position and a misinstalled position for misplaced installation; the liquid-stopping clamping rod can be rotatably installed on the main body front shell, and the liquid-stopping clamping rod is used to cooperate with the limiting protrusion to limit the flow of liquid in the tube when the infusion tube is in the installation position; the driving mechanism is installed on the main body front shell, and the driving mechanism drives the liquid-stopping clamping rod to rotate; the front door assembly is used to cover the main body front shell, and the front door assembly is provided with a liquid-stopping structure on the side facing the main body front shell, and the liquid-stopping structure is used to cooperate with the liquid-stopping clamping rod and the limiting protrusion to limit the flow of liquid in the tube when the infusion tube is in the misinstalled position.

[0005] In one embodiment, the liquid-stop structure includes: a liquid-stop platform, a liquid-stop groove and a liquid-stop protrusion; the liquid-stop platform is protruded on the side of the front door assembly close to the front shell of the main unit, and two liquid-stop platforms are arranged at intervals along the extension direction of the infusion tube; the liquid-stop groove is opened between the two liquid-stop platforms; the liquid-stop protrusion is arranged in the liquid-stop groove, and the liquid-stop protrusion divides the liquid-stop groove into a first cavity and a second cavity, the inner wall surface of the first cavity has a shape that matches the liquid-stop clamping rod, and the inner wall surface of the second cavity has a shape that matches the limiting protrusion; when the front door assembly is covered on the front shell of the main unit, the liquid-stop clamping rod is arranged between the two liquid-stop platforms and inserted into the liquid-stop groove, and the liquid-stop protrusion can abut against the liquid-stop clamping rod and / or the limiting protrusion.

[0006] In one embodiment, the liquid stop platform has a liquid stop surface and a fixed surface. The liquid stop surface is provided on a side of the liquid stop platform close to the liquid stop clamping rod, and the liquid stop surface is used to cooperate with the liquid stop clamping rod to stop the liquid of the infusion tube that is located in the wrong installation position; the fixed surface is provided on a side of the liquid stop platform close to the infusion tube groove, and when the front door assembly is covered on the front shell of the main unit, the fixed surface can be inserted into the infusion tube groove and abut against the infusion tube.

[0007] In one embodiment, a convex rib is provided in the liquid-stop groove, and the convex rib extends along the rotation direction of the liquid-stop clamping rod. The top surface of the convex rib is in an arc shape that is concave toward the front door assembly. The convex rib is used to cooperate with one end of the liquid-stop clamping rod close to the front door assembly to stop the liquid in the infusion tube that is incorrectly installed.

[0008] In one embodiment, the liquid-stop protrusion has a first abutting surface and a second abutting surface set at an angle, the first abutting surface and the second abutting surface are relatively arranged along the rotation direction of the liquid-stop clamping rod, the first abutting surface is used to abut with the liquid-stop clamping rod, and the second abutting surface is used to abut with the limiting protrusion.

[0009] In one embodiment, the front shell of the main unit has a first mounting groove and a second mounting groove on the side facing away from the front door assembly, the driving mechanism is installed in the first mounting groove, and the liquid-stop clamping rod is installed in the second mounting groove; the second mounting groove is provided with an avoidance groove for the liquid-stop clamping rod to pass through, the avoidance groove is connected to the infusion pipe groove, the liquid-stop clamping rod can rotate in the avoidance groove, and the limiting protrusion is arranged above the avoidance groove.

[0010] In one embodiment, the liquid-stop clamping rod includes a swing arm and a rotating shaft; the rotating shaft is fixedly installed in the second mounting groove, and the swing arm has a through hole for the rotating shaft to pass through; the swing arm has a driving part and a driven part that are interconnected, and the driven part is inserted into the avoidance groove.

[0011] In one embodiment, the driving mechanism includes: a transmission member, a power member, a driving plate and a reset member; the transmission member is in contact with the driving part to drive the liquid-stop clamping rod to rotate; the power member is drivingly connected to the transmission member; the driving plate is electrically connected to the power member to control the operation or stop of the power member; the reset member is elastically in contact between the liquid-stop clamping rod and the front shell of the main unit to apply a force to the driving part toward the transmission member.

[0012] In one embodiment, one side of the front door assembly is rotatably connected to the mainframe front shell, and the other side of the front door assembly is detachably connected to the mainframe front shell via a buckle.

[0013] The present invention also provides an infusion pump, which includes any one of the above-mentioned liquid-stopping devices.

[0014] The technical solution of the present invention adopts the method of providing a main body front shell and a limiting protrusion on the main body front shell in the liquid-stopping device, and providing a liquid-stopping clamping rod rotatably mounted on the main body front shell to cooperate with the limiting protrusion, so that the liquid-stopping clamping rod and the limiting protrusion can approach each other to clamp the infusion tube, thereby stopping the liquid in the infusion tube. In addition, a liquid-stopping structure capable of cooperating with the liquid-stopping clamping rod is provided in the front door assembly of the liquid-stopping device. When the infusion tube is not installed in the correct installation position but is in an incorrect installation position, after the front door assembly is closed on the main body front shell, the liquid-stopping structure can cooperate with the liquid-stopping clamping rod and the limiting protrusion to stop the liquid in the incorrect installation position without affecting the rotation of the liquid-stopping clamping rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0016] Figure 1 A schematic structural diagram of an embodiment of a liquid-stopping device provided by the present utility model;

[0017] Figure 2 This is a front view of an embodiment of a liquid-stopping device provided by the present utility model;

[0018] Figure 3 for Figure 2 Cross-sectional view of the front door assembly at AA in the middle when it is open;

[0019] Figure 4 for Figure 2 A cross-sectional view of the front door assembly at AA in the middle when it is closed;

[0020] Figure 5 for Figure 1 A partial enlarged view of point A in the middle.

[0021] Description of Figure Numbers:

[0022] 100. Liquid-stopping device; 1. Main unit front housing; 11. Infusion tube groove; 12. Limiting protrusion; 2. Liquid-stopping clamping rod; 21. Rotating shaft; 22. Driving part; 23. Driven part; 3. Driving mechanism; 31. Transmission member; 32. Power member; 33. Driving plate; 34. Resetting member; 4. Front door assembly; 41. Liquid-stopping structure; 411. Liquid-stopping platform; 4111. Liquid-stopping surface; 4112. Fixing surface; 412. Liquid-stopping groove; 4121. Raised rib; 413. Liquid-stopping protrusion; 4131. First abutting surface; 4132. Second abutting surface.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] An infusion pump is an automated control device that controls the infusion rate by acting on the infusion tubing. They are often used in situations where strict control of infusion volume and medication dosage is required, such as administering pressor medications, antiarrhythmic drugs, intravenous infusions for infants, and intravenous anesthesia. When using an infusion pump, the infusion line is typically installed in an infusion tubing trough within the pump. A movable stopper is installed along the tubing's extension path. This movement tightens or loosens the tubing, allowing the fluid within the tubing to flow as needed.

[0028] In the existing medical infusion pump technology, when the infusion tube is clamped in the infusion pump, it is occasionally not installed in place and is clamped incorrectly. At this time, since the liquid stop clamp part at the rear end of the infusion pump is usually not equipped with an alarm device, it is usually difficult to detect when the infusion tube is incorrectly clamped at this position; and the liquid stop clamp of the infusion pump is a moving mechanism. In order to ensure that the liquid stop clamp in the infusion pump will not be obstructed during movement, a certain avoidance space is usually left in the infusion pump. When the cover of the infusion pump is closed on the infusion tube groove, it will maintain a certain distance from the liquid stop clamp rod. Therefore, when the infusion tube is not correctly installed on the liquid stop clamp rod, the infusion tube will be in the space between the liquid stop clamp rod and the cover body. At this time, although the infusion tube is partially squeezed, there is still space for liquid flow, and the liquid can still flow in the infusion tube. In the front housing of the infusion pump, a pump disc is provided on the side of the main body housing near the infusion tube. The pump disc is used to apply external force to the outer wall of the infusion tube under electric drive to squeeze the infusion tube, causing the liquid in the infusion tube to flow in a preset direction. Multiple pump discs are arranged at intervals along the flow direction of the liquid in the infusion tube. During infusion, the pump discs squeeze the infusion tube in sequence along the flow direction of the liquid, and circulate back and forth to control the continuous delivery of the liquid in the infusion tube toward the human body. If the infusion tube is misinstalled, the pump disc will continue to work even without receiving an alarm, and will continue to press the infusion tube in the preset direction. At this time, even if the infusion tube is misinstalled, the liquid in the infusion tube is still infused into the human body under the action of the pump disc, resulting in free flow in the infusion tube, resulting in inaccurate infusion volume and low infusion accuracy, affecting the treatment effect.

[0029] The present invention provides a liquid stopping device 100 .

[0030] See also Figure 1-5In one embodiment of the present utility model, the liquid-stopping device 100 includes: a main body front shell 1, a liquid-stopping clamping rod 2, a driving mechanism 3 and a front door assembly 4; the main body front shell 1 has an infusion tube groove 11 for installing an infusion tube, and a limiting protrusion 12 provided on the extension path of the infusion tube groove 11, and the infusion tube has a correct installation position and a misinstallation position for misalignment; the liquid-stopping clamping rod 2 can be rotatably installed on the main body front shell 1, and the liquid-stopping clamping rod 2 is used to cooperate with the limiting protrusion 12 to limit the flow of liquid in the tube when the infusion tube is in the installation position; the driving mechanism 3 is installed on the main body front shell 1, and the driving mechanism 3 drives the connection of the liquid-stopping clamping rod 2, and the driving mechanism 3 is used to drive the liquid-stopping clamping rod 2 to rotate; the front door assembly 4 is used to cover the main body front shell 1, and the front door assembly 4 is provided with a liquid-stopping structure 41 on the side facing the main body front shell 1, and the liquid-stopping structure 41 is used to cooperate with the liquid-stopping clamping rod 2 and the limiting protrusion 12 to limit the flow of liquid in the tube when the infusion tube is in the misinstallation position.

[0031] In this embodiment, an infusion tube groove 11 is opened on the side of the main body front shell 1 close to the front door assembly 4 along the flow direction of the infusion tube liquid. When in use, the infusion tube is embedded in the infusion tube groove 11 and is not easily displaced; a limiting protrusion 12 and a liquid-stop clamping rod 2 that can cooperate with the limiting protrusion 12 are provided on the extension path of the infusion tube groove 11. When installing the infusion tube, the infusion tube is embedded in the infusion tube groove 11 and is placed between the liquid-stop clamping rod 2 and the limiting protrusion 12; the liquid-stop clamping rod 2 can be rotated toward the liquid-stop protrusion to clamp the infusion tube. The infusion tube is made of elastic material and can stop the internal liquid during the clamping process; the liquid-stop clamping rod 2 can be rotated away from the liquid-stop protrusion to loosen the infusion tube. When the front door assembly 4 is covered on the main body front shell 1, the front door assembly 4 can cover the infusion tube groove 11. At this time, the infusion tube part will fall out of the infusion tube groove 11. The front door assembly 4 is provided with a limiting protrusion on the side close to the main body front shell 1. The limiting protrusions are provided at the positions of the infusion tube groove 11 at both ends of the front door assembly 4. One end of the limiting protrusion is connected to the front door assembly 4, and the other end is provided with an arc-shaped limiting groove that matches the outer contour of the infusion tube; when the front door assembly 4 is covered on the main body front shell 1, the limiting protrusion can be inserted into the infusion tube groove 11, and the limiting groove on the limiting protrusion abuts against the outer wall of the infusion tube so that the infusion tube is limited in the limiting groove and the infusion tube groove 11. The setting of the limiting protrusion and the limiting groove can further limit the position of the infusion tube, so that it is not easy to deviate.

[0032] In this embodiment, when the infusion tube is in the correct installation position, the infusion tube is located between the liquid-stopping clamp rod 2 and the limiting protrusion 12 and can be clamped by the liquid-stopping clamp rod 2 and the limiting protrusion 12. When the infusion tube is in the incorrect installation position, the infusion tube is not located between the liquid-stopping clamp rod 2 and the limiting protrusion 12, and the liquid-stopping clamp rod 2 cannot cooperate with the limiting protrusion 12 to stop the liquid in the infusion tube. If the operator closes the front door assembly 4 without correctly installing the infusion tube in the installation position, although the liquid-stopping clamp rod 2 and the limiting protrusion 12 cannot cooperate to stop the liquid, the liquid-stopping structure 41 in the front door assembly 4 cooperates with the liquid-stopping clamp rod 2, and the liquid-stopping structure 41 cooperates with the limiting protrusion 12 to still limit the infusion tube in the incorrect installation position, thereby preventing the liquid in the infusion tube from flowing freely.

[0033] The technical solution of the present invention is to provide a main body front shell 1, and to open an infusion tube groove 11 in the main body front shell 1, and to provide a front door assembly 4 for covering the main body front shell 1, so that the infusion tube can be confined in the infusion tube groove 11 and will not move; by providing a liquid-stop clamping rod 2 to cooperate with the limiting protrusion 12 provided on the main body front shell 1, the infusion tube correctly installed in the installation position is stopped; by providing a liquid-stop structure 41 on the front door assembly 4, the infusion tube incorrectly installed in the misinstalled position is stopped. The technical solution of the present invention also adopts the method of setting a main body front shell 1 in the liquid-stopping device 100 and setting a limiting protrusion 12 on the main body front shell 1, and setting a liquid-stopping clamping rod 2 rotatably mounted on the main body front shell 1 to cooperate with the limiting protrusion 12, so that the liquid-stopping clamping rod 2 and the limiting protrusion 12 can be close to each other to clamp the infusion tube, so as to stop the liquid on the infusion tube; and further provides a liquid-stopping structure 41 capable of cooperating with the liquid-stopping clamping rod 2 in the front door assembly 4 of the liquid-stopping device 100. When the infusion tube is not installed in the correct installation position but is in the mis-installed position, after the front door assembly 4 is covered on the main body front shell 1, the liquid-stopping structure 41 can cooperate with the liquid-stopping clamping rod 2 and the limiting protrusion 12 to stop the liquid on the infusion tube in the mis-installed position without affecting the rotation of the liquid-stopping clamping rod 2.

[0034] Reference Figure 1 、 5In one embodiment, the liquid-stopping structure 41 includes: a liquid-stopping platform 411, a liquid-stopping groove 412 and a liquid-stopping protrusion 413; the liquid-stopping platform 411 is protruded on the side of the front door assembly 4 close to the front shell 1 of the main machine, and two liquid-stopping platforms 411 are arranged at intervals along the extension direction of the infusion tube; the liquid-stopping groove 412 is opened between the two liquid-stopping platforms 411; the liquid-stopping protrusion 413 is arranged in the liquid-stopping groove 412, and the liquid-stopping protrusion 413 divides the liquid-stopping groove 412 into a first cavity and a second cavity, the inner wall surface of the first cavity has a shape that matches the liquid-stopping clamping rod 2, and the inner wall surface of the second cavity has a shape that matches the limiting protrusion; when the front door assembly 4 is covered on the front shell 1 of the main machine, the liquid-stopping clamping rod 2 is arranged between the two liquid-stopping platforms 411 and inserted into the liquid-stopping groove 412, and the liquid-stopping protrusion 413 can abut against the liquid-stopping clamping rod 2 and / or the limiting protrusion 12. When the front door assembly 4 is covered on the front shell 1 of the main unit, there is a very small gap between the liquid-stopping structure 41 and the liquid-stopping clamping rod 2 and the limiting protrusion 12, so that the liquid-stopping clamping rod 2 can swing without restriction. Since the infusion tube is made of elastic material, when the infusion tube is arranged in the gap, it will be squeezed under the joint action of the liquid-stopping structure 41, the liquid-stopping clamping rod 2 and the limiting protrusion 12, and the internal space of the infusion tube will continue to shrink in the gap, and eventually the liquid will be unable to pass through, thereby achieving liquid stopping in the misinstalled state.

[0035] In this embodiment, the misinstallation positions where the infusion tube is incorrectly clamped include a first misinstallation position, a second misinstallation position and a third misinstallation position. When the infusion tube is in the first misinstallation position, the infusion tube is bent in the gap between the liquid stop platform 411 and the liquid stop clamping rod 2 in the infusion trough. When the infusion tube is in the second misinstallation position, the infusion tube is between the liquid stop protrusion 413 and the liquid stop clamping rod 2. When the infusion tube is in the third misinstallation position, the infusion tube is between the liquid stop protrusion 413 and the limit protrusion 12. When the front door assembly 4 is covered on the front shell 1 of the main unit, each structure in the liquid stop structure 41 will stop the liquid of the infusion tube located in the first misinstallation position, the second misinstallation position or the third misinstallation position, so as to avoid the phenomenon of free flow of the infusion tube due to the inability to stop the liquid through the liquid stop clamping rod 2 and the limit protrusion 12 when it is misinstalled.

[0036] Reference Figure 1 、 5In one embodiment, the liquid stop platform 411 includes a liquid stop surface 4111 and a fixing surface 4112. The liquid stop surface 4111 is located on a side of the liquid stop platform 411 near the liquid stop clamping rod 2. The liquid stop surface 4111 cooperates with the liquid stop clamping rod 2 to stop liquid from flowing into an infusion tube that is incorrectly installed. The fixing surface 4112 is located on a side of the liquid stop platform 411 near the infusion tube groove 11. When the front door assembly 4 is closed on the main body front housing 1, the fixing surface 4112 can be inserted into the infusion tube groove 11 and abut the infusion tube. The liquid stop surface 4111 cooperates with the outer wall of the liquid stop clamping rod 2 to clamp the infusion tube and stop the flow of liquid. The fixing surface 4112 is used to secure the infusion tube. The fixing surface 4112 and the inner wall of the infusion tube groove 11 together form a closed cross-sectional shape, so that the infusion tube can be confined within the closed structure, thereby confining the infusion tube in the infusion tube groove 11 and preventing it from falling out.

[0037] In one embodiment, a rib 4121 is provided within the liquid-stop groove 412. The rib 4121 extends along the rotational direction of the liquid-stop clamping rod 2. The top surface of the rib 4121 is in the shape of a circular arc that is recessed toward the front door assembly 4. The rib 4121 is configured to cooperate with the end of the liquid-stop clamping rod 2 proximal to the front door assembly 4 to stop liquid from flowing into an infusion tube that is misplaced. The liquid-stop clamping rod 2 rotates about a fixed axis, so the motion trajectory of the end of the liquid-stop clamping rod 2 is in the shape of a circular arc. The rib 4121 is configured as a recessed circular arc structure that cooperates with the motion trajectory of the end of the liquid-stop clamping rod 2, forming a small gap between the rib 4121 and the liquid-stop clamping rod without affecting the movement of the liquid-stop clamping rod 2. When the liquid-stop clamping rod 2 is misplaced and is located between the rib 4121 and the liquid-stop clamping rod 2, the gap can restrict the liquid from flowing into the infusion tube.

[0038] See Figure 3 、 4 In one embodiment, the liquid-stop protrusion 413 has a first abutting surface 4131 and a second abutting surface 4132 set at an angle. The first abutting surface 4131 and the second abutting surface 4132 are relatively arranged along the rotation direction of the liquid-stop clamping rod 2. The first abutting surface 4131 is used to abut with the liquid-stop clamping rod 2, and the second abutting surface 4132 is used to abut with the limiting protrusion 12. In this embodiment, in order to facilitate clamping, a notch is provided at one end of the liquid-stop clamping rod 2 and the limiting protrusion 12 near the front door assembly 4, and the notch is provided at the abutment point of the liquid-stop clamping rod 2 and the limiting protrusion 12. Before clamping the infusion tube, the infusion tube is first placed in the notch. When the liquid-stop clamping rod 2 and the limiting protrusion 12 are opened, the infusion tube can slide along the bottom of the notch into between the liquid-stop clamping rod 2 and the limiting protrusion 12, thereby facilitating the installation of the infusion tube; but when the infusion tube is misoperated and does not enter between the liquid-stop clamping rod 2 and the limiting protrusion 12 but is still in the notch, the shape of the liquid-stop protrusion 413 can cooperate with the shape of the notch to form a smaller accommodating space, and the infusion tube can be clamped between the first abutment surface 4131 and the liquid-stop clamping rod 2 and between the second abutment surface 4132 and the limiting protrusion 12 to stop the liquid in the infusion tube.

[0039] In one embodiment, the front housing 1 of the main unit has a first mounting groove and a second mounting groove on a side facing away from the front door assembly 4. The driving mechanism 3 is mounted in the first mounting groove, and the liquid-stopping clamping rod 2 is mounted in the second mounting groove. The second mounting groove defines an escape groove for the liquid-stopping clamping rod 2 to pass through. The escape groove connects to the infusion pipe groove 11, and the liquid-stopping clamping rod 2 can rotate within the escape groove. A limiting protrusion 12 is provided above the escape groove. The first mounting groove is used to install the driving mechanism 3, and the second mounting groove is used to install the liquid-stopping clamping rod 2. The escape groove is defined on a side of the second mounting groove near the infusion pipe groove 11 to connect to the infusion pipe groove 11. When the liquid-stopping clamping rod 2 is installed, the liquid-stopping clamping rod 2 can pass through the escape groove to reach the infusion pipe groove 11. The limiting protrusion 12 is provided above the infusion pipe groove 11 so that after the liquid-stopping clamping rod 2 passes through the escape groove, it cooperates with the limiting protrusion 12 above to stop the liquid in the infusion pipe.

[0040] In one embodiment, the liquid-stop clamping rod 2 includes a swing arm and a rotating shaft 21; the rotating shaft 21 is fixedly installed in the second installation groove, and the swing arm has a through hole for the rotating shaft 21 to pass through; the swing arm has a driving part 22 and a driven part 23 that are interconnected, and the driven part 23 is inserted into the avoidance groove. In this embodiment, the driving part 22 and the driven part 23 of the swing arm are arranged vertically to optimize the structural space of the main body front shell 1 and avoid the space occupied by the liquid-stop clamping rod 2 being too long in the horizontal direction. The liquid-stop clamping rod 2 controls the rotation of the entire liquid-stop clamping rod 2 through the driving part 22, so that the driven part 23 swings up and down; when the driving part 22 moves toward the front door assembly 4, the driven part 23 moves downward, and at this time the driven part 23 is separated from the limiting protrusion 12 to allow the infusion tube to enter, and when the driving part 22 moves in the direction away from the front door assembly 4, the driven part 23 moves upward, and at this time the driven part 23 and the limiting protrusion 12 approach each other, clamping the infusion tube to stop the liquid; the liquid-stop clamping rod 2 cooperates with the limiting protrusion 12 located above the avoidance groove to stop the liquid in the infusion tube through the up and down swinging of the driven part 23.

[0041] In one embodiment, the driving mechanism 3 includes: a transmission member 31, a power member 32, a driving plate 33 and a reset member 34; the transmission member 31, the transmission member 31 abuts against the driving part 22 to drive the liquid-stop clamping rod 2 to rotate; the power member 32 drives the connected transmission member 31; the driving plate 33 is electrically connected to the power member 32 to control the operation or stop of the power member 32; the reset member 34, the reset member 34 elastically abuts between the liquid-stop clamping rod 2 and the main body front shell 1 to apply a force toward the transmission member 31 to the driving part 22. In this embodiment, the power member 32 is installed in the first installation groove. The power member 32 has an output shaft. The transmission member 31 is connected to the output shaft. The transmission member 31 is arranged above the power member 32 and performs rotational motion. The transmission member 31 is a cam. By changing the distance between the outer contour edge of the cam and the output shaft, the driving part 22 of the swing arm is pushed to move toward the direction of the front door assembly 4, thereby driving the driven part 23 and the limit protrusion 12 to open; the reset member 34 is a spring, which is arranged on the side of the driving part 22 away from the cam, and applies pressure toward the cam to the driving part 22 so that the driving part 22 can always abut against the cam, avoiding the situation where the driving part 22 cannot retreat after the cam pushes the driving part 22 to the farthest point. The reset member 34 can ensure that the driving part 22 can move along the edge of the cam. Under the joint action of the reset member 34 and the transmission member 31, the driving part 22 reciprocates between the reset member 34 and the transmission member 31 to realize the clamping and opening of the liquid-stop clamping rod 2 and the limit protrusion 12.

[0042] In one embodiment, one side of the front door assembly 4 is pivotally connected to the front housing 1 of the main unit, and the other side of the front door assembly 4 is detachably connected to the front housing 1 of the main unit via a buckle. In this embodiment, the front door assembly 4 is pivotally connected to the front housing 1 of the main unit so that the front door assembly 4 and the front housing 1 are integrally provided, thereby preventing the cover of the front door assembly 4 from being lost. The other side of the front door assembly 4 is detachably connected via a buckle. In other embodiments, the front door assembly 4 can also be provided separately from the front housing 1 of the main unit so that the entire front door assembly 4 can be removed for easy replacement if damaged.

[0043] The present invention also provides an infusion pump, comprising any of the above-mentioned stop devices 100. The specific structure of the stop device 100 is described with reference to the above-mentioned embodiments. Since the present infusion pump utilizes all of the technical solutions of all of the above-mentioned embodiments, it at least possesses all of the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. The infusion pump can precisely control the infusion rate through signals and achieve remote monitoring and management. By providing the stop device 100, the infusion pump can stop the infusion even when the infusion tube is incorrectly installed, thereby preventing free flow.

[0044] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A liquid stopping device, characterized in that: include: The front housing of the main unit has an infusion tube groove for installing an infusion tube, and a limiting protrusion provided on an extension path of the infusion tube groove. The infusion tube has an installation position for correct installation and an incorrect installation position for misaligned installation. a liquid-stop clamping rod rotatably mounted on the front housing of the main unit, the liquid-stop clamping rod being used to cooperate with the limiting protrusion to limit the flow of liquid in the tube when the infusion tube is in the installation position; A driving mechanism is installed on the front housing of the main unit, the driving mechanism is connected to the liquid-stop clamping rod, and the driving mechanism is used to drive the liquid-stop clamping rod to rotate; as well as A front door assembly is used to cover the front shell of the main unit. A liquid-stop structure is provided on the side of the front door assembly facing the front shell of the main unit. The liquid-stop structure is used to cooperate with the liquid-stop clamping rod and the limiting protrusion to limit the flow of liquid in the tube when the infusion tube is in the misinstalled position.

2. The liquid stopping device according to claim 1, characterized in that: The liquid-stop structure comprises: A liquid stopper is protrudingly provided on a side of the front door assembly close to the front housing of the main unit, and two liquid stoppers are provided at intervals along the extending direction of the infusion tube; a liquid-stopping groove, provided between the two liquid-stopping platforms; a liquid-stopping protrusion provided in the liquid-stopping groove, the liquid-stopping protrusion dividing the liquid-stopping groove into a first cavity and a second cavity, the inner wall surface of the first cavity having a shape that matches the liquid-stopping clamping rod, and the inner wall surface of the second cavity having a shape that matches the limiting protrusion; When the front door assembly is covered on the main body front shell, the liquid-stop clamping rod is arranged between the two liquid-stop platforms and inserted into the liquid-stop groove, and the liquid-stop protrusion can abut against the liquid-stop clamping rod and / or the limiting protrusion.

3. The liquid stopping device according to claim 2, characterized in that: The liquid stop platform has a liquid stopping surface and a fixing surface. The liquid stopping surface is provided on a side of the liquid stop platform close to the liquid stopping clamping rod. The liquid stopping surface is used to cooperate with the liquid stopping clamping rod to stop the liquid in the infusion tube that is located in the wrong installation position; the fixing surface is provided on a side of the liquid stop platform close to the infusion tube groove. When the front door assembly is covered on the front shell of the main unit, the fixing surface can be inserted into the infusion tube groove and abut against the infusion tube.

4. The liquid stopping device according to claim 2, characterized in that: A convex rib is provided in the liquid-stop groove, and the convex rib extends along the rotation direction of the liquid-stop clamping rod. The top surface of the convex rib is in an arc shape that is concave toward the front door assembly. The convex rib is used to cooperate with one end of the liquid-stop clamping rod close to the front door assembly to stop the liquid in the infusion tube that is incorrectly installed.

5. The liquid stopping device according to claim 2, characterized in that: The liquid-stop protrusion has a first abutting surface and a second abutting surface set at an angle. The first abutting surface and the second abutting surface are relatively arranged along the rotation direction of the liquid-stop clamping rod. The first abutting surface is used to abut against the liquid-stop clamping rod, and the second abutting surface is used to abut against the limiting protrusion.

6. The liquid stopping device according to claim 1, characterized in that: The front shell of the main unit has a first mounting groove and a second mounting groove on the side facing away from the front door assembly, the driving mechanism is installed in the first mounting groove, and the liquid-stop clamping rod is installed in the second mounting groove; the second mounting groove is provided with an avoidance groove for the liquid-stop clamping rod to pass through, the avoidance groove is connected to the infusion pipe groove, the liquid-stop clamping rod can rotate in the avoidance groove, and the limiting protrusion is arranged above the avoidance groove.

7. The liquid stopping device according to claim 6, characterized in that: The liquid-stop clamping rod includes a swing arm and a rotating shaft; the rotating shaft is fixedly installed in the second installation groove, and the swing arm has a through hole for the rotating shaft to pass through; the swing arm has a driving part and a driven part that are interconnected, and the driven part is inserted into the avoidance groove.

8. The liquid stopping device according to claim 7, characterized in that: The driving mechanism comprises: a transmission member, the transmission member abutting against the driving portion to drive the liquid-stop clamping rod to rotate; A power member, driving and connecting the transmission member; A driving plate, electrically connected to the power member to control the power member to operate or stop; A reset member is elastically abutted between the liquid-stop clamping rod and the main body front shell to apply a force to the driving part toward the transmission member.

9. The liquid stopping device according to any one of claims 1 to 8, characterized in that: One side of the front door assembly is rotatably connected to the mainframe front shell, and the other side of the front door assembly is detachably connected to the mainframe front shell via a buckle.

10. An infusion pump, characterized in that: The infusion pump comprises the liquid stopping device according to any one of claims 1 to 9.

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