Liquid stopping clamp, infusion pump and infusion system

Abstract

The utility model discloses a liquid stopping clamp, an infusion pump and an infusion system. The liquid stopping clamp comprises a base, a clamping piece, a primary clamping piece, a secondary clamping piece, a first matching part and a second matching part, the clamping piece is rotationally connected to the base; the primary clamping piece is arranged on one of the base and the clamping piece, the first matching part is arranged on the other one of the base and the clamping piece, and the primary clamping piece is clamped with the first matching part so as to fix the infusion tube between the clamping piece and the base; the secondary clamping piece is clamped with the second matching part, so that the infusion tube is fixed between the clamping piece and the base; wherein the secondary clamping piece comprises at least two first buckling pieces which are independently arranged, and the first buckling pieces which are independently arranged are configured to be separated from the second matching parts through independent actions. Therefore, only when all the first clamping fasteners are subjected to external acting force, the first clamping fasteners can be separated from the second matching part, and the possibility that the liquid stopping clamp is opened due to mistaken touch when the liquid stopping clamp is replaced by medical staff is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical infusion, in particular to a liquid-stopping clamp, an infusion pump and an infusion system. BACKGROUND

[0002] The closed infusion pump can only be used with a specific brand or type of infusion tube, and the specific brand or type of infusion tube is often pre-provided with a corresponding liquid-stopping clamp. The closed infusion pump is provided with a mounting and cooperation structure of a liquid-stopping driving element matched with the above liquid-stopping clamp, so as to prevent other brands or types of infusion tubes from being used by mistake, and to ensure the safety control of the infusion process. However, in the existing liquid-stopping clamp structure, the medical staff is easy to mistakenly touch part of the liquid-stopping clamp during the replacement of a new infusion tube or the installation of the infusion tube, so that the internal flow path of the infusion tube is conducted, thereby causing the liquid in the infusion pump to flow into the patient's body unexpectedly, which threatens the safety of the patient. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a liquid-stopping clamp, an infusion pump and an infusion system, which can avoid the internal fluid passage of the infusion tube from being conducted unexpectedly due to the mistaken triggering of the liquid-stopping clamp during the replacement of a new infusion tube or the installation of the infusion tube.

[0004] In a first aspect, the present application provides a liquid-stopping clamp for cooperating with an infusion tube, the liquid-stopping clamp comprising a base, a clamping piece, a primary clamping piece, a secondary clamping piece, a first cooperation part and a second cooperation part; the clamping piece is rotationally connected to the base;

[0005] The primary clamping piece is arranged on one of the base or the clamping piece, the first cooperation part is arranged on the other one of the base or the clamping piece, and the primary clamping piece is clamped with the first cooperation part to fix the infusion tube between the clamping piece and the base;

[0006] The secondary clamping piece is arranged on one of the base or the clamping piece, the second cooperation part is arranged on the other one of the base or the clamping piece, and the secondary clamping piece is clamped with the second cooperation part to further block the internal flow path of the infusion tube fixed between the clamping piece and the base;

[0007] The secondary clamping piece comprises at least two independently arranged first clamping pieces, and the independently arranged first clamping pieces are configured to be clamped with the second cooperation part by independent actions, respectively.

[0008] In a possible implementation, the secondary card holder is arranged on the clamping member, and the clamping member comprises a body and a first elastic arm, one end of the body is rotationally connected to the base, and the other end of the body is connected to the first elastic arm.

[0009] The first elastic arm comprises at least two elastic portions which are arranged at least partially spaced apart from each other, and each of the elastic portions is correspondingly connected to each of the first buckles to make the corresponding first buckle disengage from the second matching portion by deformation.

[0010] In a possible implementation, the first elastic arm further comprises a connecting portion which is connected between the elastic portion and the body.

[0011] In a possible implementation, the first elastic arm is at least partially arranged in a curved manner.

[0012] In a possible implementation, the first elastic arm is provided with a separation groove which is arranged between each adjacent elastic portion.

[0013] The width of the separation groove is A, and 1mm≤A≤8mm.

[0014] In a possible implementation, the first elastic arm is provided with a separation groove which is arranged between each adjacent elastic portion.

[0015] In the width direction of the liquid-stopping clamp, the projection length of the curved portion of the first elastic arm is B, the projection length of the separation groove is C, and 1 / 3≤C / B≤2 / 3.

[0016] In a possible implementation, the clamping member comprises a body and a second elastic arm, the second elastic arm is connected between the body and the base, and the primary card holder and the secondary card holder are connected to the body.

[0017] The second elastic arm is used to provide the required force for separating the clamping member from the base.

[0018] In a possible implementation, the primary card holder comprises at least two second buckles, and in each of the second buckles, at least two second buckles are arranged on both sides of the first buckle in the width direction of the liquid-stopping clamp.

[0019] In a possible implementation, the first buckle has a first hook which is matched with the second matching portion, and the first hook is protruded in the length direction of the clamping member.

[0020] The second buckle member has a second hook that cooperates with the first cooperating part, and the second hook is protruded along the width direction of the clamping member.

[0021] In one possible implementation, the liquid-stopping clamp further comprises a stopper, which is arranged on one of the base or the clamping member.

[0022] When the secondary clamping member is clamped with the second cooperating part, the stopper is located on the side of the secondary clamping member away from the clamping member, and the stopper is used to block at least part of the secondary clamping member in the direction away from the clamping member.

[0023] In a second aspect, the application further provides a liquid infusion pump, which comprises a pump body, a liquid-stopping clamp driving element, and a liquid-stopping clamp.

[0024] The liquid-stopping clamp driving element is arranged in the accommodating groove, and has a mounting groove in which the liquid-stopping clamp is arranged. The liquid-stopping clamp driving element is used to drive the movement of the base and / or the clamping member. The liquid-stopping clamp comprises a base, a clamping member, a primary clamping member, a secondary clamping member, a first cooperating part, and a second cooperating part. The clamping member is rotationally connected to the base.

[0025] The primary clamping member is arranged on one of the base or the clamping member, and the first cooperating part is arranged on the other one of the base or the clamping member. The primary clamping member is clamped with the first cooperating part to fix the infusion tube between the clamping member and the base.

[0026] The secondary clamping member is arranged on one of the base or the clamping member, and the second cooperating part is arranged on the other one of the base or the clamping member. The secondary clamping member is clamped with the second cooperating part to further block the internal flow path of the infusion tube fixed between the clamping member and the base.

[0027] The secondary clamping member comprises at least two independently arranged first buckle members, which are configured to be respectively separated from the second cooperating part through independent actions.

[0028] In a third aspect, the application further provides a liquid infusion system, which comprises a liquid infusion pump and an infusion tube with a liquid-stopping clamp. The liquid infusion pump comprises a pump body and a pump door. The pump body is internally provided with an accommodating groove for accommodating the infusion tube, a pump driving element, and a liquid-stopping clamp driving element.

[0029] The liquid-stopping clamp comprises a base, a clamping piece, a primary clamping piece, a secondary clamping piece, a first matching part and a second matching part; the primary clamping piece is arranged on one of the base or the clamping piece, the first matching part is arranged on the other one of the base or the clamping piece, the primary clamping piece is used to clamp the first matching part to form an assembled state of the liquid-stopping clamp, so that the infusion tube is fixed between the clamping piece and the base; the secondary clamping piece is arranged on one of the base or the clamping piece, the second matching part is arranged on the other one of the base or the clamping piece, wherein the secondary clamping piece comprises at least two independently arranged first buckling pieces, the at least two independently arranged first buckling pieces are respectively connected with corresponding elastic parts, and the elastic parts are arranged at intervals.

[0030] The working process of the infusion pump sequentially comprises the following four stages, specifically comprising:

[0031] In the first stage, the infusion tube is accommodated in the accommodating groove, the assembled liquid-stopping clamp is arranged in the mounting groove of the liquid-stopping clamp driving element in advance, and reaches a preset position inside the liquid-stopping clamp driving element, the liquid-stopping clamp driving element pushes one of the clamping piece and / or the base towards the other one to make the secondary clamping piece clamp the second matching part, so as to further block the internal flow path of the infusion tube;

[0032] In the second stage, the pump door is turned towards the pump body, the protrusions of the pump door abut the elastic parts corresponding to the at least two first buckling pieces respectively to make the at least two first buckling pieces respectively deform, and the second matching part is loosened;

[0033] In the third stage, the liquid-stopping clamp driving element moves towards a direction away from the clamping piece and / or the base pushed by the liquid-stopping clamp driving element, so that the clamping piece and / or the base rebound towards the opposite direction, so that the internal flow path of the infusion tube is re-conducted, and then the pump body driving element extrudes the infusion tube to make the fluid inside the infusion tube flow towards a preset direction;

[0034] In the fourth stage, a pump door opening instruction is received, the liquid-stopping clamp driving element pushes one of the clamping piece and / or the base towards the other one to make the internal flow path of the infusion tube re-blocked, and then the pump door moves towards a direction away from the pump body, and no longer abuts the elastic parts corresponding to the at least two first buckling pieces, the elastic parts corresponding to the at least two first buckling pieces rebound to clamp the second matching part.

[0035] In the technical solution of the present application, the liquid-stopping clamp comprises a base, a clamping piece, a primary clamping piece, a secondary clamping piece, a first matching part and a second matching part. Under the interaction of the primary clamping piece and the first matching part, the clamping piece and the base are clamped together to relatively fix the liquid-stopping clamp to the infusion tube. One of the secondary clamping piece and the second matching part is arranged on the clamping piece, and the other is arranged on the base. The secondary clamping piece and the second matching part are clamped together, so that the clamping piece and the base can further squeeze the infusion tube, thereby blocking the internal flow path of the infusion tube. The secondary clamping piece is arranged as at least two independently distributed first buckles. When the secondary clamping piece and the corresponding second matching part are clamped together and block the internal flow path of the infusion tube, only when all the first buckles are subjected to external force and separated from the second matching part, the clamping piece will be separated from the base, and the internal flow path of the infusion tube will be restored. In this way, by improving the reliability of the liquid-stopping clamp, when the medical staff installs or replaces the infusion tube, the internal flow path of the infusion tube can be prevented from being accidentally conducted by the liquid-stopping clamp being accidentally touched, so that the liquid in the infusion tube is not unexpectedly flowed into the patient's body. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1 A perspective structural schematic diagram of an embodiment of the infusion system provided by the present application;

[0038] Figure 2 A perspective structural schematic diagram of an embodiment of the infusion system provided by the present application; Figure 1 A perspective structural schematic diagram of an embodiment of the infusion system provided by the present application;

[0039] Figure 3 A perspective structural schematic diagram of an embodiment of the infusion system provided by the present application; Figure 2 A perspective structural schematic diagram of an embodiment of the infusion system provided by the present application;

[0040] Figure 4 A perspective structural schematic diagram of an embodiment of the infusion system provided by the present application; Figure 2 A perspective structural schematic diagram of an embodiment of the infusion system provided by the present application;

[0041] Figure 5 A perspective structural schematic diagram of an embodiment of the infusion system provided by the present application; Figure 1 A cross-sectional view of an embodiment of the first elastic arm and the second buckle;

[0042] Figure 6 A cross-sectional view of an embodiment of the first elastic arm and the second buckle; Figure 1 A cross-sectional view of an embodiment of the first elastic arm and the second buckle;

[0043] Figure 7 is Figure 4 perspective view of the infusion system after the infusion tube has been removed;

[0044] Figure 8 is Figure 1 front view of the stopper clamp in the blocking state;

[0045] Figure 9 is Figure 1 cross-sectional view of one embodiment of the elastic portion;

[0046] Figure 10 is Figure 1 cross-sectional view of another embodiment of the elastic portion;

[0047] Figure 11 is Figure 1 cross-sectional view of yet another embodiment of the elastic portion;

[0048] Figure 12 is Figure 2 perspective view from another viewing angle;

[0049] Figure 13 is Figure 1 partial enlarged view at A;

[0050] Figure 14 is Figure 1 perspective view of the stopper clamp drive element;

[0051] Figure 15 is Figure 1 perspective view of the pump door in the closed state;

[0052] Figure 16 is Figure 1 perspective view of the pump body and the pump door;

[0053] Figure 17 is Figure 2 side view;

[0054] Figure 18 is Figure 1 side view of the stopper clamp in the assembled state;

[0055] Figure 19 is Figure 1 cross-sectional view of the stopper clamp in the blocking state.

[0056] Explanation of reference signs:

[0057] 1000 - infusion system;

[0058] 100 - stopper clamp;

[0059] 1 - base, 11 - limiting groove;

[0060] 2-clip, 21-body, 22-first elastic arm, 221-elastic part, 222-connection part, 223-division groove, 23-second elastic arm;

[0061] 3-primary clamping member, 31-second clamping member, 311-first clamping hook;

[0062] 4-secondary clamping member, 41-first clamping member, 411-second clamping hook;

[0063] 5-first matching part, 6-second matching part, 7-stop member, 8-first limiting member, 9-second limiting member;

[0064] 200-infusion tube;

[0065] 300-infusion pump;

[0066] 310-pump body, 3101-receiving groove, 320-pump driving element, 330-liquid stop clamp driving element, 331-driving frame, 332-mounting groove, 333-driving assembly, 3331-motor, 3332-screw, 3333-transmission gear, 334-pushing member, 340-pump door, 341-protrusion. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0068] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intervening component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intervening component.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0070] Some embodiments of the present application will be described in detail below with reference to the drawings. The following examples and features in the examples can be combined with each other without conflict.

[0071] Please refer to Figure 1 This application discloses an infusion system 1000 for precise fluid delivery to patients during medical procedures. The infusion system 1000 includes an infusion pump 300, a stop clamp 100, and an infusion tubing 200. The infusion pump 300 controls the fluid flow rate and / or volume to ensure that the fluid enters the patient's body at a set rate. The infusion tubing 200 serves as a connection passage for delivering fluid from the infusion pump 300 to the patient's body. The stop clamp 100 is used in conjunction with the infusion tubing 200 to control the flow path within the infusion tubing 200.

[0072] Please refer to Figure 2 and Figure 3 For ease of description, we will now use Figure 2 The X direction is the length direction of the liquid clamp 100, and the Y direction is the width direction of the liquid clamp 100.

[0073] The liquid-stopping clamp 100 includes a base 1, a clamping member 2, a primary clamping member 3, a secondary clamping member 4, a first mating part 5, and a second mating part 6. The base 1 serves as a support structure for the liquid-stopping clamp 100, supporting and connecting the various component assemblies of the liquid-stopping clamp 100. The clamping member 2 is rotatably connected to the base 1 and can rotate around the connection point of the base 1. The base 1 and the clamping member 2 can be made of plastic, such as POM, metal, or other composite materials; this application does not impose any limitations on these materials.

[0074] The primary clamping member 3 engages with the first mating part 5 to fix the clamping member 2 onto the base 1, thereby fixing the infusion tube 200 between the clamping member 2 and the base 1, completing the assembly between the infusion tube 200 and the stop clamp 100 (this assembly state can be called the assembly state). The primary clamping member 3 can be disposed on the base 1 or on the clamping member 2. Correspondingly, the first mating part 5 can be disposed on the clamping member 2 or on the base 1. This application does not limit this. Exemplarily, in one embodiment of this application, the primary clamping member 3 is disposed on the clamping member 2, and the first mating part 5 is disposed on the base 1. When the clamping member 2 rotates towards the base 1 under the action of external force, the primary clamping member 3 will engage with the first mating part 5 under the drive of the clamping member 2, thereby clamping the infusion tube 200 between the base 1 and the clamping member 2, and thus realizing the assembly of the infusion tube 200 on the stop clamp 100.

[0075] The secondary clamping member 4 is configured to be clamped with the second matching part 6, and to further press the clamping member 2 and the base 1 to the infusion tube 200, so as to block the flow path in the infusion tube 200. The secondary clamping member 4 can be arranged on the base 1 or the clamping member 2, and the second matching part 6 can be arranged on the clamping member 2 or the base 1, which is not limited in the present application. For example, in an embodiment of the present application, the secondary clamping member 4 is arranged on the clamping member 2, and the second matching part 6 is arranged on the base 1. When the clamping member 2 rotates to the side of the base 1 under the action of an external force, the secondary clamping member 4 will be clamped with the second matching part 6 under the action of the clamping member 2, so that the clamping member 2 and the base 1 are further close and locked, thereby achieving the blocking of the internal flow path of the infusion tube 200.

[0076] In the embodiment of the present application, the secondary clamping member 4 is arranged as at least two independently distributed first buckles 41. When the secondary clamping member 4 is clamped with the corresponding second matching part 6 and blocks the internal flow path of the infusion tube 200, only when all the first buckles 41 are separated from the corresponding second matching part 6 under the action of an external force, the clamping member 2 will be unlocked with the base 1, and the internal flow path of the infusion tube 200 will be restored. In this way, the reliability of the liquid stop clamp can be improved, thereby reducing the possibility that the internal flow path of the infusion tube 200 is accidentally opened and the liquid in the infusion tube 200 flows into the patient's body unexpectedly due to accidental touch of the liquid stop clamp 100 when the medical staff installs or replaces the infusion tube 200.

[0077] The secondary clamping member 4 can include two first buckles 41, or more than two first buckles 41, such as three first buckles 41 or four first buckles 41, which is not limited in the present application. Each first buckle 41 can be arranged on the clamping member 2 or the base 1 in the length direction of the liquid stop clamp 100, or can be arranged on the clamping member 2 or the base 1 in the width direction of the liquid stop clamp, or can be arranged on the clamping member 2 or the base 1 in a non-flat or non-uniform manner, which is not limited in the present application. For example, in an embodiment of the present application, the secondary clamping member 4 includes two first buckles 41, and the two first buckles 41 are arranged on the clamping member 2 in the width direction of the liquid stop clamp 100. The two first buckles 41 are the minimum number of the secondary clamping member 4 to prevent accidental touch of the liquid stop clamp 100. Arranging two first buckles 41 can effectively reduce the space occupied by the secondary clamping member 4, reduce the volume of the liquid stop clamp 100, and improve the space utilization of the liquid stop clamp 100. In addition, the symmetrical arrangement of the two first buckles 41 can ensure the uniformity of the force received by the secondary clamping member 4 and the second matching part 6 when they are matched, thereby improving the stability of the locking of the liquid stop clamp 100.

[0078] The primary clamping member 3 comprises a second clamping member 31, the number of the second clamping member 31 can be one, and the number of the second clamping member 31 can also be multiple. When the second clamping member 31 is multiple, the second clamping member 31 can be symmetrically arranged on the clamping member 2 or the base 1 along the length direction of the liquid-stopping clamp 100, or the second clamping member 31 can be symmetrically arranged on the clamping member 2 or the base 1 along the width direction of the liquid-stopping clamp 100. Similarly, each second clamping member 31 can be arranged on the clamping member 2 or the base 1 in front and back. The present application does not limit this.

[0079] It can be understood that when the primary clamping member 3 comprises multiple second clamping members 31, the second clamping members 31 can be arranged on both sides of the first clamping member 41 along the width direction of the liquid-stopping clamp 100, or the second clamping members 31 can be arranged on both sides of the first clamping member 41 along the length direction of the liquid-stopping clamp 100, or part of the second clamping members 31 can be arranged on one side of the first clamping member 41 along the width direction of the liquid-stopping clamp 100, and part of the second clamping members 31 can be arranged on one side of the first clamping member 41 along the length direction of the liquid-stopping clamp 100. The present application does not limit this. Exemplarily, in an embodiment of the present application, the primary clamping member 3 comprises at least two second clamping members 31, and in each second clamping member 31, at least two second clamping members 31 are arranged on both sides of the first clamping member 41 along the width direction of the liquid-stopping clamp 100. The design of the two sides of the second clamping member 31 can effectively improve the uniformity of the force on the first cooperation part 5 when the second clamping member 31 cooperates with the first cooperation part 5, and reduce the risk of deformation or loosening of the clamping member 2 caused by unilateral force, thereby improving the stability of the state switching of the liquid-stopping clamp 100.

[0080] In an embodiment of the present application, the first clamping member 41 has a first hook 311 cooperating with the second cooperation part 6, and the first hook 311 protrudes along the length direction of the clamping member 2. The second clamping member 31 has a second hook 411 cooperating with the first cooperation part 5, and the second hook 411 protrudes along the width direction of the clamping member 2. In this way, after the first hook 311 is separated from the second cooperation part 6, the second hook 411 can stably engage with the second cooperation part 6 during the lifting of the clamping member 2, thereby reducing the possibility of disengagement of the second hook 411 from the second cooperation part 6 and improving the reliability of the liquid-stopping clamp 100.

[0081] Please refer to Figure 4 The clamping member 2 comprises a body 21 and a first elastic arm 22. The body 21 serves as the structural main body of the clamping member 2, and is used to cooperate with the base 1 to fix and clamp the infusion tube 200. One end of the body 21 is rotationally connected with the base 1, and the other end of the body 21 is connected with the first elastic arm 22. In an embodiment of the present application, a limiting groove 11 is formed between the body 21 and the base 1, and the infusion tube 200 is arranged in the limiting groove 11. The limiting groove 11 is used to increase the contact area between the infusion tube 200 and the liquid-stopping clamp, thereby improving the stability of the clamping of the infusion tube 200 by the liquid-stopping clamp.

[0082] It can be understood that when the primary card holder 3 and the secondary card holder 4 are arranged on the clamping piece 2, the primary card holder 3 and the secondary card holder 4 can be arranged on the body 21 or on the first elastic arm, which is not limited in the present application. Exemplarily, in an implementable manner of the present application, the primary card holder 3 and the secondary card holder 4 are arranged on the first elastic arm 22, and the first elastic arm 22 can be elastically deformed under the action of external force, thereby reducing the clamping difficulty between the primary card holder 3 and the first matching part 5 and between the secondary card holder 4 and the second matching part 6, and improving the smoothness of the clamping of the clamping piece 2 to the base 1. On the other hand, the first elastic arm 22 can provide elastic force for the clamping of the primary card holder 3 and the first matching part 5 and the clamping of the secondary card holder 4 and the second matching part 6, and the first card holder and the second card holder can not reserve elastic deformation or only reserve part of the elastic deformation capability, which also makes the designer appropriately reduce the length size of the first card holder and the second card holder when designing the structure of the first card holder and the second card holder, and thereby reduces the height size of the liquid stopping clamp 100 and improves the space utilization rate of the liquid stopping clamp 100 in the height direction.

[0083] The first elastic arm 22 can be arranged in a straight line or can be bent, which is not limited in the present application. Exemplarily, in an implementable manner of the present application, the first elastic arm 22 is at least partially arranged in a bent manner, so as to increase the length of the first elastic arm 22 in a unit volume as much as possible, reduce the occupation of the first elastic arm 22 to the space while ensuring the elasticity of the first elastic arm 22, and improve the space utilization rate of the first elastic arm 22 to the liquid stopping clamp 100.

[0084] Please refer to Figure 5 and Figure 6 It should be noted that the first elastic arm 22 is at least partially arranged in a bent manner, which means that the first elastic arm 22 can be composed of the part shown in the a area in the figure as shown in Figure 5 , and the first clamping piece (not shown in the figure) and the second clamping piece 31 are arranged on the elastic arm. The first elastic arm 22 can be composed of the part shown in the a' area in the figure as shown in Figure 6 , at this time, the first elastic arm has a part of the curved part and a part of the downward extending straight line area a1', which can be used as a connecting part of the first elastic arm 22 and the first clamping piece (not shown in the figure) and the second clamping piece 31, or as a common structure of the first clamping piece (not shown in the figure) and the second clamping piece 31 and the first elastic arm.

[0085] Please refer to Figure 7In an embodiment of the present application, the first elastic arm 22 comprises at least two elastic portions 221, and the two elastic portions 221 are arranged at least partially spaced apart, i.e. the adjacent elastic portions 221 can be completely free of contact, or the adjacent elastic portions 221 can be connected by one or more connecting members.

[0086] Each elastic portion 221 is connected to a corresponding first clamping member 41. In this way, on the one hand, the elastic portion 221 can deform to allow the corresponding first clamping member 41 to disengage from the second matching portion 6. On the other hand, the spaced-apart elastic portions 221 can also allow the first clamping members 41 to be arranged relatively independently (i.e. the first clamping members 41 are not in contact with each other), thereby effectively reducing the possibility that one of the first clamping members 41 moves and drives the other first clamping members 41 to move, thereby reducing the possibility that the secondary clamping member 4 is separated from the second matching portion 6 when being accidentally touched, and finally reducing the possibility that the liquid stop clamp 100 is accidentally opened during installation or disassembly.

[0087] It should be noted that the elastic portion 221, the first clamping member 41 and the second clamping member 31 can be two independent structures, or as shown in the drawings, the elastic portion 221 extends downward and forms part of the structure of the first clamping member 41 and the second clamping member 31, and the present application does not limit this. Figure 6

[0088] Each elastic portion 221 can be arranged spaced apart on the body 21, or can be connected to the body 21 by an intermediate member. In an embodiment of the present application, the first elastic arm 22 further comprises a connecting portion 222, which is connected between the elastic portion 221 and the body 21 as an intermediate member. The connecting portion 222 is used to improve the strength of the first elastic arm 22 and improve the stability of the first elastic arm 22 in supporting the primary clamping member 3 and the secondary clamping member 4.

[0089] The first elastic arm 22 is provided with a separation groove 223 arranged between each adjacent elastic portion 221 to separate the formation of each elastic portion 221. The area of the first elastic arm 22 not provided with the separation groove 223 forms the connecting portion 222. The number of separation grooves 223 should be associated with the number of elastic portions 221. When the number of elastic portions 221 is two, one separation groove 223 needs to be provided on the first elastic arm 22. When the number of elastic portions 221 is three, two separation grooves 223 need to be provided on the first elastic arm 22. And so on.

[0090] Please refer to Figure 8 ​​​​​​​​​​​The width of the separation groove 223 is determined by the material and width of the first elastic arm 22. In an embodiment of the present application, the width of the separation groove 223 is A, 1mm≤A≤8mm. Within the size limit, the support strength of the elastic part 221 for the primary card holder 3 and the secondary card holder 4 can be ensured, and the difficulty of forming the elastic part 221 is reduced, the manufacturing process is simplified, and the manufacturing cost of the liquid stop clamp 100 is reduced.

[0091] Please refer to Figure 9 The separation groove 223 can be arranged along the entire circumference of the first elastic arm 22 (i.e., the elastic part 221 is directly connected to the body 21), or can only extend for a partial length (i.e., the elastic part 221 is connected to the body 21 through the connecting part 222). In an embodiment of the present application, the projection length of the first elastic arm 22 along the width direction of the liquid stop clamp 100 is B, and the projection length of the separation groove 223 is C, 1 / 3≤C / B≤2 / 3. Within the proportion limit, the elastic part 221 has sufficient length to provide elastic deformation for the buckling of the primary card holder 3 and the first cooperating part 5, and the buckling of the secondary card holder 4 and the second cooperating part 6, and the support strength of the first elastic part is ensured, and the reliability of the liquid stop clamp 100 is ensured.

[0092] It should be noted that the projection length of the first elastic arm 22 and the projection length of the separation groove 223 should be associated with the specific shape of the first elastic arm 22. For example, when the projection of the first elastic arm 22 is arranged as shown in Figure 9 , the projection length of the first elastic arm 22 should be the projection arc length B of the first elastic arm 22 in the width direction of the liquid stop clamp 100, and the length of the separation groove 223 should be the projection arc length C of the separation groove 223 in the width direction of the liquid stop clamp 100. When the projection of the first elastic arm 22 is arranged as shown in Figure 10 , the projection length of the first elastic arm 22 should be the straight line length L1 of the projection of the first elastic arm 22 in the width direction of the liquid stop clamp 100, and the length of the separation groove 223 should be the straight line length L2 of the projection of the separation groove 223 in the width direction of the liquid stop clamp 100. When the projection of the first elastic arm 22 is a combination of an arc and a straight line as shown in Figure 11 , the projection length of the first elastic arm 22 should be the sum of the straight line length L3 of the first elastic arm 22 in the width direction of the liquid stop clamp 100 and the arc length D of the first elastic arm 22 in the width direction of the liquid stop clamp 100, and the length of the separation groove 223 should be the projection arc length E of the separation groove 223 in the width direction of the liquid stop clamp 100.

[0093] Please refer to Figure 12The clamping piece 2 further comprises a second elastic arm 23 connected between the body 21 and the base 1. The second elastic arm 23 is used to provide the required force for separating the clamping piece 2 from the base 1. After the secondary clamping piece 4 is separated from the second matching part 6, the body 21 of the clamping piece 2 can be lifted up under the action of the second elastic arm 23 and quickly separated from the base 1, thereby releasing the flow path of the infusion tube 200. The provision of the second elastic arm 23 can accelerate the separation speed of the body 21 of the clamping piece 2 from the base 1, accelerate the conduction speed of the flow path of the infusion tube 200, and improve the response speed of the infusion pump 300.

[0094] When the liquid stopper 100 is installed in the infusion pump 300, the medical staff will open the pump door and contact the liquid stopper 100 when replacing the infusion pump 300 or handling the infusion tube or other emergency situations. In this process, the medical staff may accidentally touch the liquid stopper 100 installed in the infusion pump 300, which may cause the internal flow path of the infusion tube to be accidentally conducted. To solve the above problem, in an embodiment of the present application, the liquid stopper 100 further comprises a stopper 7 provided on one of the base 1 or the clamping piece 2. When the secondary clamping piece 4 is engaged with the second matching part 6, the stopper 7 is located on the side of the secondary clamping piece 4 away from the clamping piece 2, and the stopper is arranged to face the opening direction of the pump door. The stopper is used to shield at least part of the secondary clamping piece in the direction away from the clamping piece. In this way, the force-receiving area of the secondary clamping piece in the opening direction of the pump door is reduced, the possibility of external force being applied to the secondary clamping piece in the opening direction of the pump door is reduced, the possibility of the liquid stopper 100 being accidentally opened is reduced, and the reliability of the infusion pump 300 during use is improved.

[0095] The liquid stopper 100 further comprises a first limiting part 8 provided on the base 1 and a second limiting part 9 provided on the clamping piece 2. When the liquid stopper 100 is in the blocking state, the first limiting part 8 and the second limiting part 9 can contact in the width direction of the liquid stopper 100, thereby limiting the movement of the clamping piece 2 in the width direction of the liquid stopper 100, and further reducing the possibility of the clamping piece 2 shaking when clamping the infusion tube 200, and improving the stability of the liquid stopper 100 in clamping the infusion tube 200.

[0096] Please refer to Figure 13 The infusion pump 300 comprises a pump body 310, a pump driving element 320, and a liquid stopper driving element 330. The pump body 310 serves as the structural main body of the infusion pump 300 and is used to support and connect various parts of the infusion pump 300. The pump body 310 forms a containing groove 3101 with an open side. The pump driving element 320, the liquid stopper driving element 330, the infusion tube 200, and the liquid stopper 100 are all installed in the containing groove 3101.

[0097] The pump driving element 320 is used to apply pressure to the infusion tube 200, so as to drive the flow of liquid in the infusion tube 200, and the liquid stopper driving element 330 is used to be connected with the liquid stopper 100, so as to control the opening and closing state of the liquid stopper 100, thereby realizing the fluid on-off control of the infusion tube 200.

[0098] Please refer to Figure 13 and Figure 14 , the liquid stopper driving element 330 can push the clamping piece 2 and / or the base 1 to move, so as to control the opening and closing of the liquid stopper 100. In an embodiment of the present application, the liquid stopper driving element 330 comprises a driving frame 331, a driving assembly 333 and a pushing piece 334, the driving frame 331 is formed with a mounting groove 332, and the liquid stopper 100 and the infusion tube 200 are mounted in the mounting groove 332. The pushing piece 334 is slidingly arranged in the mounting groove 332, and during the sliding process, the pushing piece 334 can contact the clamping piece 2, so as to push the clamping piece 2 to move, thereby pushing the clamping piece 2 to move towards the base 1, and making the secondary clamping piece 4 and the second matching part 6 clamped with each other, thereby closing the liquid stopper 100.

[0099] It can be understood that in other embodiments of the present application, the pushing piece 334 can also contact the base 1 and push the base 1 to move towards the clamping piece 2, thereby closing the liquid stopper 100. Alternatively, the pushing piece 334 can also contact the base 1 and the clamping piece 2 at the same time, and push the clamping piece 2 and the base 1 to move towards each other, thereby closing the liquid stopper 100, which is not limited in the present application.

[0100] The driving assembly 333 is connected with the pushing piece 334 to drive the pushing piece 334 to move. The driving assembly 333 can be a gas cylinder, or can be a motor and a lead screw, which is not limited in the present application. Exemplarily, in an embodiment of the present application, the driving assembly 333 comprises a motor 3331, a lead screw 3332 and a transmission gear 3333, the motor 3331 is fixed to the driving frame 331, the lead screw 3332 is connected with the pushing piece 334, and the transmission gear 3333 is in transmission connection with the motor 3331. In specific application, the driving force of the motor 3331 can be transmitted to the lead screw 3332 through the transmission gear 3333, and drive the lead screw 3332 to rotate, the rotation of the lead screw 3332 drives the pushing piece 334 to move in the mounting groove 332, and pushes the liquid stopper 100 and / or the base 1 to move, thereby closing the liquid stopper.

[0101] Please refer to Figure 7 , Figure 15 and Figure 16It can be understood that after the liquid stopper 100 is closed, the main factors that hinder the reopening of the liquid stopper 100 are the clamping force of the secondary clamping member 4 and the second cooperation part 6 on the clamping member 2 and the base 1, and the pushing force of the liquid stopper driving element 330 on the base 1 and / or the clamping member 2. Therefore, if the liquid stopper 100 needs to be reopened at this time, the secondary clamping member 4 and the second cooperation part 6 need to be separated first, and then the pushing force of the liquid stopper driving element 330 on the base 1 and / or the clamping member 2 is removed.

[0102] In order to separate the secondary clamping member 4 and the second cooperation part 6, in an embodiment of the present application, the infusion pump 300 further comprises a pump door 340, which is rotationally connected to the pump body 310. The pump door 340 is used to cover the opening of the accommodation groove 3101. The pump door 340 has a protrusion 341. When the pump door 340 is rotated towards the pump body 310 and closes the opening, the protrusion 341 of the pump door 340 abuts against at least two elastic parts 221 corresponding to the first buckling members 41 respectively to make at least two first buckling members 41 deform respectively, and each elastic part 221 provided with a first buckling member 41 elastically deforms, so that the first buckling member 41 and the second cooperation part 6 are separated.

[0103] It should be noted that the number of protrusions 341 can be one or more. When the protrusions 341 are provided in multiple, the number of protrusions 341 corresponds to the number of elastic parts 221 provided with the first buckling members 41 one by one and is correspondingly arranged. In this way, when the pump door 340 is closed, the protrusions 341 can abut against all the elastic parts 221 at the same time, so that the first buckling members 41 and the second cooperation part 6 are separated.

[0104] The pump door 340 can directly push the elastic part 221 to deform, or indirectly push the elastic part 221 to move, which is not limited in the present application. In an embodiment of the present application, the protrusion 341 contacts the second buckling member 31 provided on the elastic part 221, and pushes the elastic part 221 to move away from the pump door 340 through the second buckling member 31, so as to push the first buckling member 41 to separate from the second cooperation part 6. The second buckling member 31 can provide a force point for the contact between the protrusion 341 and the elastic part 221, and prolong the pushing torque of the protrusion 341 on the elastic arm, increase the pushing force of the protrusion 341 on the elastic part 221, increase the deformation degree of the elastic part 221, and improve the smoothness of the separation of the first buckling member 41 from the second cooperation part 6.

[0105] It can be understood that in other embodiments of the present application, the secondary clamping member 4 can also be driven to separate from the second matching part 6 by the liquid stopper driving element 330. Specifically, in the embodiment, the liquid stopper driving element 330 can further comprise a top holding member connected with the driving assembly 333 and capable of sliding in the installation slot 332 under the driving of the driving assembly 333. During the sliding process, the top holding member can contact the elastic part 221, thereby pushing the elastic part 221 to move away from the pump door 340, and pushing the first clamping member 41 to separate from the second matching part 6.

[0106] After the secondary clamping member 4 separates from the second matching part 6, the liquid stopper driving element 330 moves away from the direction of the clamping member 2 and / or the base 1 pushed by the liquid stopper driving element 330, and removes the pushing force applied to the clamping member 2 and / or the base 1, so that the liquid stopper can rebound in the opposite direction under the action of the second elastic arm 23, thereby opening the liquid stopper 100.

[0107] In the following, the working process of the infusion pump 300 will be described in detail in combination with the structure of the infusion pump 300 and the state changes of the liquid stopper 100.

[0108] Please refer to Figures 17 to 19 , the liquid stopper 100 has an open and close state, an assembled state and a blocking state. As Figure 17 shown, in the open and close state, the first end of the clamping member 2 is rotationally connected to the base 1, and the second end can freely rotate relative to the base 1. The clamping member 2 does not contact or has a certain activity space with the infusion tube 200, and the infusion tube 200 can freely move in the clamping member 2.

[0109] As shown in Figure 18 , in the assembled state, the primary clamping member 3 of the clamping member 2 is clamped with the first matching part 5, the clamping member 2 is locked on the base 1, the clamping member 2 contacts the infusion tube 200, and the infusion tube 200 is fixed between the clamping member 2 and the base 1.

[0110] As shown in Figure 19 , in the blocking state, the secondary clamping member 4 of the clamping member 2 is clamped with the second matching part 6, the clamping member 2 is further locked on the base 1, and the second end of the clamping member 2 tightly abuts the base 1 and extrudes the infusion tube 200, thereby blocking the liquid flow in the infusion tube 200.

[0111] Please refer to Figures 13 to 19After the production of the liquid stopper 100 is completed, the assembly with the infusion tube 200 will be completed on the production line, that is, the liquid stopper 100 is switched from the open-close state to the assembled state and assembled with the infusion tube 200, and the assembled liquid stopper 100 and the infusion tube 200 will be sent to the hospital together with the infusion pump 300 and used. The working process of the infusion pump 300 includes the following four stages in sequence:

[0112] In the first stage, the liquid stopper 100 in the assembled state and the infusion tube 200 will be installed to a preset position inside the liquid stopper driving element 330. The preset position can be installed to the position by the medical staff at one time, or the liquid stopper 100 can be pushed to the preset position by other structures (such as the pump door 340 of the infusion pump 300) after being installed to a certain position by the medical staff, which is not limited in the present application. In order to ensure that the liquid stopper 100 can be installed to the preset position, in an embodiment of the present application, a position detection device is further arranged in the infusion pump 300, which is used for detecting the position of the liquid stopper 100. When the liquid stopper 100 is not installed to the preset position, the position detection device will send a signal to the controller of the infusion pump 300, and the controller will alarm or display text through the buzzer or display panel to remind the medical staff that the liquid stopper 100 is not installed to the position, thereby improving the use safety of the infusion pump 300.

[0113] After the liquid stopper 100 is installed to the preset position, the controller (not shown in the figure) drives the liquid stopper driving element 330 to push the clamping piece 2 and / or the base 1 to each other, so that the secondary clamping piece 4 is clamped with the second matching part 6, and the clamping piece 2 and the base 1 reach the closest state; wherein in this state, the primary clamping piece 3 and the first matching part 5 can be clamped with each other or separated from each other, which is not limited in the present application. After the secondary clamping piece 4 is clamped with the second matching part 6, the liquid stopper 100 is switched from the assembled state to the blocking state, and further blocks the internal flow path of the infusion tube 200. In this way, it is ensured that the liquid in the infusion tube 200 will not leak accidentally during the equipment calibration or setting preparation of the infusion pump 300, thereby improving the safety of the operation of the infusion pump 300. It should be noted that the way in which the liquid stopper driving element 330 pushes the clamping piece 2 and the base 1 to each other can be pushing the clamping piece 2 to the base 1, pushing the base 1 to the clamping piece 2, or pushing the clamping piece 2 and the base 1 to each other, which is not limited in the present application.

[0114] In some embodiments of the present application, the infusion pump 300 is further provided with a pressure detection device for detecting the pressure in the infusion tube 200. In some applications, when the liquid stopper 100 blocks the flow in the infusion tube 200, the pump driving element 320 will pressurize the infusion tube 200, and the pressure detection device detects whether the pressure in the infusion tube 200 reaches a preset value. If the pressure does not reach the preset value or rapidly decreases, it may indicate that the pipeline is damaged or leaked. By this method, the pipeline problem can be quickly identified and located, and the safety of the infusion pump 300 is improved.

[0115] In the second stage, when the pump door 340 is closed, the infusion pump 300 will push the secondary clamping member 4 to separate from the second matching part 6. For example, in some embodiments of the present application, the infusion pump 300 further comprises a pump door 340, which is rotatably connected to the pump body 310, and the pump door 340 is used to cover the opening of the accommodating groove 3101. The pump door 340 has a protrusion 341, and when the pump door 340 rotates towards the pump body 310 and closes the opening, the protrusion 341 of the pump door 340 abuts against the elastic part 221 corresponding to at least two first clamping members 41 respectively, and makes the first clamping member 41 connected with the elastic part 221 elastically deformed, and then separates from the second matching part 6, and completes the unlocking of the base 1 and the clamping member 2.

[0116] It can be understood that in some embodiments of the present application, the pressure detection device can also be used in this stage to detect the pressure in the infusion tube 200. When the first clamping member 41 separates from the second matching part 6 under the action of the pump door, the pump driving element 320 will pressurize the infusion tube 200, and the pressure detection device detects whether the pressure in the infusion tube 200 reaches a preset value. If the pressure does not reach the preset value or rapidly decreases, it may indicate that the pipeline is damaged or leaked. By this method, the pipeline problem can be quickly identified and located, and the safety of the infusion pump 300 is improved.

[0117] In the third stage, the liquid stopper driving element 330 moves towards the direction away from the clamping piece 2 and / or the base 1 it pushes, so as to make the clamping piece 2 and / or the base 1 rebound towards the opposite direction, and make the internal flow path of the infusion tube 200 re-conduct, and then the pump body 310 driving element extrudes the infusion tube 200, so as to make the fluid inside the infusion tube 200 flow towards the preset direction. In the specific application, after the first buckle 41 separates from the second matching part 6, the driving assembly 333 removes the pushing force of the pushing piece 334 on the clamping piece 2 and / or the base 1. After losing the external force applied by the pushing piece 334, the clamping piece 2 and / or the base 1 will be bounced to the side away from the base 1 under the action of the second elastic arm 23, and separate from the base 1. Thus, the internal flow path of the infusion tube 200 is re-conducted, and then the controller controls the pump driving element 320 to move, so that the liquid in the infusion tube 200 can be input into the patient's body under the driving of the pump driving element 320.

[0118] Need to be explained, the rebound of the clamping piece 2 and / or the base 1 towards the opposite direction means that if the pushing piece 334 only pushes the clamping piece 2 to move, when the pushing force of the pushing piece 334 is removed, the clamping piece 2 will rebound under the action of the second elastic arm 23 and separate from the base 1. If the pushing piece 334 only pushes the base 1 to move, when the pushing force of the pushing piece 334 is removed, the base 1 will rebound under the action of the second elastic arm 23 and separate from the clamping piece 2. If the pushing piece 334 pushes the base 1 and the clamping piece 2 to move simultaneously, when the pushing force of the pushing piece 334 is removed, the base 1 and the clamping piece 2 will rebound simultaneously under the action of the second elastic arm 23 and separate from each other.

[0119] In the fourth stage, the liquid stopper 100 will be switched to the blocking state (the liquid stopper 100 can be switched from the assembled state to the blocking state, or switched from the open-close state to the blocking state, which is not limited in the present application) under the driving of the liquid stopper driving element 330, in the blocking state, the liquid stopper 100 blocks the flow of liquid in the infusion tube 200, thereby avoiding the unintended input of liquid in the infusion tube 200 during the opening of the pump door 340, improving the safety of the infusion pump 300. Specifically, when the medical staff needs to replace the infusion pump 300, or remove the infusion tube or other emergency handling, the medical staff will send an open instruction of the pump door 340 to the infusion pump 300. The open instruction can be issued by the medical staff through voice, or can be controlled by the medical staff to control the control panel of the infusion pump 300 to issue, or can be issued by the medical staff to press the pump door 340 open button of the infusion pump 300, or can be directly detected by the built-in sensor to detect the state of the pump door 340, so as to identify the intention of the user to open the pump door and send the open instruction of the pump door. The present application does not make any limitation on this. After receiving the open instruction of the pump door 340, the liquid stopper driving element 330 will push the clamping piece 2 and the base 1 to approach each other, and make the secondary clamping piece 4 and the second matching part 6 clamped with each other. The way that the liquid stopper driving element 330 pushes the clamping piece 2 and the base 1 to approach each other can be that the clamping piece 2 is pushed to approach the base 1, or the base 1 is pushed to approach the clamping piece 2, or the clamping piece 2 and the base 1 are pushed to approach each other to the closest state, which is not limited in the present application.

[0120] After the secondary clamping piece 4 and the second matching part 6 are clamped, the liquid stopper driving element 330 removes the force applied to the clamping piece 2 and the base 1, and then the infusion pump 300 opens the pump door 340. As the pump door 340 moves away from the pump body 310, it no longer abuts against the elastic part 221 corresponding to the at least two first buckling pieces 41, and the elastic part 221 corresponding to the at least two first buckling pieces 41 rebounds and clamps the second matching piece. In this way, the internal flow path of the infusion tube 200 is blocked, thereby reducing the possibility of leakage of liquid in the infusion tube 200 when the medical staff replaces the infusion pump 300, or removes the infusion tube or other emergency handling, and improving the safety of the infusion pump 300.

[0121] In the description of the embodiments of the present application, it should be noted that the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like refer to the orientation or positional relationship based on the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0122] The above disclosure is only a preferred embodiment of the present application, of course, cannot be limited by this, the person skilled in the art can understand that the above-mentioned all or part of the process is realized, and the equivalent change is made according to the claims of the present application, still belongs to the scope covered by the present application.

Claims

1. A liquid stopper for use with an infusion tube, characterized in that, The liquid-stopping clamp comprises a base, a clamping piece, a primary clamping piece, a secondary clamping piece, a first matching part and a second matching part; the clamping piece is rotationally connected to the base; The primary clamping piece is arranged on one of the base and the clamping piece, and the first matching part is arranged on the other one of the base and the clamping piece; the primary clamping piece is clamped with the first matching part to fix the infusion tube between the clamping piece and the base; The secondary clamping piece is arranged on one of the base and the clamping piece, and the second matching part is arranged on the other one of the base and the clamping piece; the secondary clamping piece is clamped with the second matching part to further block the internal flow path of the infusion tube fixed between the clamping piece and the base; The secondary clamping piece comprises at least two independently arranged first clamping pieces, and the independently arranged first clamping pieces are configured to be clamped with the second matching part through independent actions.

2. The fluid stop of claim 1, wherein, The secondary clamping piece is arranged on the clamping piece, and the clamping piece comprises a body and a first elastic arm; one end of the body is rotationally connected to the base, and the other end of the body is connected to the first elastic arm; The first elastic arm comprises at least two elastic parts, and the two elastic parts are at least partially spaced apart; each of the elastic parts is connected to a corresponding first clamping piece to make the corresponding first clamping piece be clamped with the second matching part through deformation.

3. The fluid stop of claim 2, wherein, The first elastic arm further comprises a connecting part connected between the elastic part and the body.

4. A fluid stop as claimed in claim 2 or 3, wherein, The first elastic arm is at least partially arranged in a curved manner.

5. The fluid stop of claim 2 wherein, The first elastic arm is provided with a separation groove arranged between each adjacent elastic part; The width of the separation groove is A, and 1mm≤A≤8mm.

6. The fluid stop of claim 2 wherein, The first elastic arm is provided with a separation groove arranged between each adjacent elastic part; Along the width direction of the liquid-stopping clamp, the projection length of the curved part of the first elastic arm is B, the projection length of the separation groove is C, and 1 / 3≤C / B≤2 / 3.

7. The fluid stop of claim 1 wherein, The clamping piece comprises a body and a second elastic arm; the second elastic arm is connected between the body and the base; the primary clamping piece and the secondary clamping piece are connected to the body; The second elastic arm is used to provide the force required for separating the clamping piece from the base.

8. A fluid stop as claimed in any one of claims 1 to 3, wherein, The primary clamping piece comprises at least two second clamping pieces; in each of the second clamping pieces, at least two second clamping pieces are arranged on both sides of the first clamping piece along the width direction of the liquid-stopping clamp.

9. The fluid stop of claim 8, wherein, The first clamping piece has a first hook matched with the second matching part; the first hook is protruded along the length direction of the clamping piece; The second clamping piece has a second hook matched with the first matching part; the second hook is protruded along the width direction of the clamping piece.

10. The fluid stop of claim 1 wherein, The liquid-stopping clamp further comprises a stopper arranged on one of the base and the clamping piece. When the secondary clamping member is engaged with the second matching part, the stopper is located on the side of the secondary clamping member away from the clamping member, and the stopper is used to shield at least part of the secondary clamping member in the direction away from the clamping member.

11. An infusion pump, characterized by The pump body is provided with a containing groove; The stopper driving element is arranged in the containing groove, and has a mounting groove, and the stopper is mounted in the mounting groove; The stopper driving element is used to drive the secondary clamping member and the second matching part to be engaged, so as to block the liquid flow path in the infusion tube; The stopper driving mechanism is also used to drive the secondary clamping member and the second matching part to be separated, so as to make the flow path in the infusion tube conductive.

12. An infusion system, characterized by The infusion pump comprises a pump body and a pump door, and the pump body is internally provided with a containing groove for accommodating the infusion tube, a pump driving element and a stopper driving element; The stopper comprises a base, a clamping member, a primary clamping member, a secondary clamping member, a first matching part and a second matching part; the primary clamping member is arranged on one of the base or the clamping member, the first matching part is arranged on the other one of the base or the clamping member, the primary clamping member is used to clamp the first matching part, so as to form an assembled state of the stopper, so as to fix the infusion tube between the clamping member and the base; the secondary clamping member is arranged on one of the base or the clamping member, and the second matching part is arranged on the other one of the base or the clamping member, wherein the secondary clamping member comprises at least two independently arranged first buckling members, and the at least two independently arranged first buckling members are respectively connected with corresponding elastic parts, and the elastic parts are arranged at intervals.

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