CN219921723U - Infusion tube clamping mechanism and infusion device - Google Patents

Abstract

The embodiment of the utility model belongs to the technical field of infusion devices, and relates to an infusion tube clamping mechanism which comprises a main body, a driving assembly, a first elastic piece, an extrusion piece and a limiting piece, wherein one end of the main body is provided with the limiting piece, the other end of the main body is provided with the driving assembly, and the first elastic piece and the extrusion piece are movably arranged between the limiting piece and the driving assembly. The driving assembly is used for driving the first elastic piece to enable the first elastic piece to drive the extrusion piece to move towards the limiting piece. The limiting piece is used for clamping the infusion tube in a matched mode with the extrusion piece. The utility model also relates to an infusion device which comprises the infusion tube clamping mechanism. According to the technical scheme provided by the utility model, the first elastic piece is arranged between the infusion tube clamping mechanism and the driving module and the extrusion piece in the infusion device, so that the first elastic piece can play a role in buffering force through self deformation, and the instant force born by the infusion tube after the extrusion piece is abutted against the infusion tube is relieved, so that the infusion tube is prevented from being excessively stressed and damaged.

Description

Infusion tube clamping mechanism and infusion device

Technical Field

The utility model relates to the technical field of infusion and injection medical instruments, in particular to an infusion tube clamping mechanism and an infusion device.

Background

In the field of infusion and injection medical instruments, an infusion tube clamping mechanism is often required to control the flow of liquid in a pipeline of an infusion tube so as to realize the functions of switching, choking, shunting, fluid speed control and the like of different pipelines.

The working principle of the conventional infusion tube clamping mechanism is that an extrusion piece is driven to reciprocate by adopting a power-on coil, a stepping motor and the like, so that the extrusion piece extrudes the infusion tube, and the effect of blocking or controlling the flow of liquid in the infusion tube is achieved.

Disclosure of Invention

The technical problem to be solved by the embodiment of the utility model is that the infusion tube is damaged due to the fact that the instant force applied to the infusion tube is large when the infusion tube is clamped by the existing infusion tube clamping mechanism.

In order to solve the technical problems, the embodiment of the utility model provides an infusion tube clamping mechanism, which comprises a main body, a driving component, a first elastic piece, an extrusion piece and a limiting piece, wherein one end of the main body is provided with the limiting piece, the other end of the main body is provided with the driving component, and the first elastic piece and the extrusion piece are movably arranged between the limiting piece and the driving component; the driving assembly is used for driving the first elastic piece to enable the first elastic piece to drive the extrusion piece to move towards the limiting piece; the limiting piece is used for clamping the infusion tube in a matched mode with the extrusion piece.

Further, the infusion tube clamping mechanism further comprises a second elastic piece, one end of the second elastic piece is arranged at one end of the main body, which is close to the limiting piece, and the other end of the second elastic piece is arranged at the extrusion piece and used for pushing the extrusion piece to reset.

Further, the driving assembly comprises a driving piece and a moving piece, the moving piece is connected to the driving piece, the driving piece is used for driving the moving piece to reciprocate between the driving piece and the first elastic piece, one end of the first elastic piece is connected to the moving piece, and the other end of the first elastic piece is connected to the extrusion piece.

Further, the inside travel path that is provided with of main part, drive assembly is lead screw motor and slider, the lead screw of lead screw motor stretch into travel path and connect in the slider, the slider first elastic component the extrusion part all is located in the travel path, the lead screw motor the slider first elastic component the extrusion part the locating part all is along travel path length direction is sharp distribution.

Further, a first limiting groove is formed in one end, facing the first elastic piece, of the extrusion piece, the shape and the size of the first limiting groove are matched with those of the first elastic piece, and the first elastic piece is partially located in the first limiting groove.

Further, the limiting piece is provided with a second limiting groove for accommodating the infusion tube, one end, close to the second limiting groove, of the extrusion piece is provided with an abutting portion, and the shape of the abutting portion is matched with that of the second limiting groove.

Further, the cross section of the second limiting groove is semicircular.

Further, the infusion tube clamping mechanism also comprises a sensor and a controller;

the sensor is connected to the main body and is used for detecting state information of any one of the driving assembly, the extrusion piece and the liquid in the infusion tube;

the controller is connected to the main body, is electrically connected with the driving assembly and the sensor, and is used for controlling the driving assembly to operate according to the state information.

Further, the sensor is a null sensor.

In order to solve the above technical problems, an embodiment of the present utility model further provides an infusion device, which includes the infusion tube clamping mechanism described above.

Compared with the prior art, the embodiment of the utility model has the following main beneficial effects:

according to the embodiment of the utility model, the first elastic piece is arranged between the infusion tube clamping mechanism and the driving module and the extrusion piece in the infusion device, and can play a role in buffering force through self deformation, so that the instant force born by the infusion tube after the extrusion piece is abutted against the infusion tube is alleviated, and the infusion tube is prevented from being excessively stressed and damaged.

Drawings

In order to more clearly illustrate the utility model or the solutions of the prior art, a brief description will be given below of the drawings used in the description of the embodiments or the prior art, it being obvious that the drawings in the description below are some embodiments of the utility model and that other drawings can be obtained from them without the inventive effort of a person skilled in the art.

FIG. 1 is a schematic view of a tube gripping device according to an embodiment of the present utility model;

FIG. 2 is a left side view of the infusion tube clamp mechanism of FIG. 1;

FIG. 3 is a cross-sectional view A-A of the infusion tube clamping mechanism of FIG. 2;

FIG. 4 is a B-B cross-sectional view of the infusion tube clamping mechanism of FIG. 2;

FIG. 5 is a schematic view of the structure of an extrusion in the tubing clamp mechanism of an embodiment of the present utility model as it would contact the tubing;

fig. 6 is a schematic view of the structure of the infusion tube clamping mechanism according to the embodiment of the utility model when the extrusion presses the infusion tube.

Reference numerals:

infusion tube clamping mechanism 10, infusion tube 20;

the device comprises a main body 100, a moving channel 110, a third limiting groove 120, a driving assembly 200, a screw motor 210, a screw 220, a sliding block 230, a first elastic piece 300, a second elastic piece 400, an extrusion 500, an abutting part 510, a first limiting groove 520, a limiting piece 600, a second limiting groove 610 and a sensor 700.

Detailed Description

Unless defined otherwise, 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 utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In order to solve the above-mentioned technical problems, referring to fig. 1 to 4, an embodiment of the present utility model provides an infusion tube clamping mechanism 10. The infusion tube clamping mechanism 10 includes a body 100, a drive assembly 200, a first resilient member 300, an expression member 500, and a stop member 600. The main body 100 is provided with a limiting member 600 at one end and a driving assembly 200 at the other end, and the first elastic member 300 and the pressing member 500 are movably disposed between the limiting member 600 and the driving assembly 200. When the infusion tube clamping mechanism 10 works, the driving assembly 200 drives the first elastic member 300 to move, the first elastic member 300 contacts and pushes the extrusion member 500 to move towards the limiting member 600 in the moving process, the extrusion member 500 contacts the infusion tube 20 placed on the limiting member 600 in the moving process, and continuously extrudes the infusion tube 20 to gradually close the infusion tube 20, and clamping of the infusion tube 20 is completed together with the limiting member 600. At the moment that the pressing member 500 contacts the infusion tube 20, the first elastic member 300 is elastically deformed by the driving force provided by the driving assembly 200 and the reaction force provided by the infusion tube 20, so that the buffering function of absorbing the driving force and the reaction force is achieved, and the infusion tube 20 is prevented from being damaged due to excessively high instantaneous stress.

It will be appreciated that the drive assembly 200 can be started and stopped at any time, thereby enabling control of the flow rate of the infusion tube 20 by controlling the degree of closure of the infusion tube 20. For example, it may be desirable to control the flow rate of the fluid in the tubing 20 to 50% of the initial flow rate, i.e., to stop operation of the drive assembly 300 when the cross-sectional area of the extrusion 500 abutting the tubing 20 to the tubing 20 is 50% of the original flow rate, thereby resulting in a 50% flow rate of the fluid in the tubing 20. The first elastic member 300 is one of a spring, a spring sheet, and the like, which can elastically deform to play a role of buffering, and a combination thereof. The driving assembly 200 is one of a stepping motor, a screw motor, etc. capable of driving the pressing member 500 to move, and a combination thereof, and its positional relationship with the main body 100 may be any one of being located inside the main body 100, embedded in the main body 100, and independent of the outside of the main body 100. The limiting member 600 may be integrally formed with the main body 100 or detachably connected thereto. Compared with the limiting piece 600 which is detachably connected with the main body 100, when the limiting piece 600 and the main body 100 are integrally formed, the limiting piece 600 can bear larger force without being separated from the main body 100. When the stopper 600 is detachably connected to the main body 100, the cleaning efficiency of the main body 100 and the stopper 600 can be improved, and simultaneously, the maximum clamping range of the infusion tube clamping mechanism 10 can be changed by switching the stoppers 600 with different sizes.

Referring to fig. 4, the infusion tube clamping mechanism 10 further includes a second elastic member 400, wherein one end of the second elastic member 400 abuts against one end of the main body 100 near the limiting member 600, and the other end abuts against the pressing member 500. When the driving mechanism is reset, the second elastic member 400 pushes the pressing member 500 to reset by the elastic force generated by the release of the elastic deformation of itself, thereby improving the use efficiency of the infusion tube clamping mechanism 10. It can be appreciated that the end of the main body 100 near the limiting member 600 may be provided with a third limiting groove 120, where the third limiting groove 120 is located on the bottom wall of the moving channel 110, so as to fix the second elastic member 400, and avoid sliding when the second elastic member 400 elastically deforms. The second elastic member 400 includes a spring, a leaf spring, etc. capable of elastically deforming to perform a buffering function, and a combination thereof. When the moving channel 110 is connected to the limiting member 600, the second elastic member 400 may also have one end connected to the limiting member 600 and the other end connected to the pressing member 500.

The driving assembly 200 includes a driving member (not shown), a moving member (not shown) coupled to the driving member, and a first elastic member 300 having one end coupled to the moving member and the other end coupled to the pressing member 500. When the driving piece drives the moving piece to reset, the moving piece drives the first elastic piece 300 to move, and meanwhile, the movement of the first elastic piece 300 drives the extrusion piece 500 to move, so that the resetting of the first elastic piece 300 and the extrusion piece 500 is realized, and the use efficiency of the infusion tube clamping mechanism 10 is improved. It will be appreciated that the moving member and the driving member are, in some embodiments, a slider 230 and a lead screw motor 210, respectively. The infusion tube clamping mechanism 10 can be provided with the second elastic member 400 and the first elastic member 300 simultaneously, and when the movable member is reset, the extrusion piece 500 can be subjected to the tensile force provided by the first elastic member 300 and the thrust force provided by the second elastic member 400 simultaneously, so that the reset speed of the extrusion piece 500 is improved, and the use efficiency of the infusion tube clamping mechanism 10 is improved.

Further, the various components of the prior art infusion tube clamping mechanism that transmit force are distributed in various orientations within the infusion tube clamping mechanism, resulting in the need for additional gearing mechanisms to connect the components to effect a directional change in force. Referring to fig. 3 and 4, the driving assembly 200 of the infusion tube clamping mechanism 10 in this embodiment is a screw motor 210 and a slider 230, the main body 100 is a sleeve, a moving channel 110 is disposed inside, the screw 220 of the screw motor 210 extends into the moving channel 110 and is connected to the slider 230, the first elastic member 300 and the extrusion member 500 are all located in the moving channel 110, the screw motor 210, the slider 230, the first elastic member 300, the extrusion member 500 and the limiting member 600 are all linearly distributed along the length direction of the moving channel 110, and the force is transferred as a straight line, so that the effect of reducing the production cost and the volume of the infusion tube clamping mechanism without additionally adding a transmission mechanism is achieved. It will be appreciated that the size and shape of the movement channel 110 can be adapted to the shape and size of the extrusion 500, thereby improving the assembly efficiency of the infusion tube clamping mechanism 10 by completing the assembly positioning of the extrusion 500 through the movement channel 110.

Further, referring to fig. 3 and 4, a first limiting groove 520 is formed at one end of the extrusion 500 facing the first elastic member 300, the shape and size of the first limiting groove 520 are matched with those of the first elastic member 300, the first elastic member 300 is partially located in the first limiting groove 520, the first limiting groove 520 can limit the movement of the first elastic member 300, the first elastic member 300 is prevented from slipping, and the assembly and positioning of the first elastic member 300 are performed to improve the assembly efficiency of the first elastic member 300.

Further, referring to fig. 5 and 6, if the shape of the second limiting groove 610 is not matched with the shape of the abutting portion 510, for example, the shape of the cross street of the abutting portion 510 shown in fig. 6 is square, the second limiting groove 610 is an arc-shaped groove, and at this time, the abutting portion 510 cannot fully fill the second limiting groove 610 to squeeze the infusion tube 20, so that the infusion tube 20 cannot be fully closed or the flow rate of the liquid in the infusion tube 20 cannot be precisely controlled. Therefore, in this embodiment, the limiting member 600 is provided with the second limiting groove 610, for accommodating the infusion tube 20, the end of the extrusion member 500, which is close to the second limiting groove 610, is provided with the abutting portion 510, and the shape of the abutting portion 510 is adapted to the shape of the second limiting groove 610, so that the abutting portion 510 can fully fill the space in the second limiting groove 610, and the closing of the infusion tube 20 and the accurate control of the flow rate of the liquid in the infusion tube 20 are realized. It is understood that the cross-sectional shape of the second limiting groove 610 includes an arc shape, a semicircular shape, and the like. Because the infusion tube 20 is mostly round tube, the infusion tube 20 can be fully fixed when the shape surface of the second limiting groove 610 is semicircular, and when the notch of the second limiting groove 610 is consistent with the diameter of the infusion tube 20, the second limiting groove 610 can fully accommodate the infusion tube 20 and avoid the infusion tube 20 from rolling.

Further, the infusion tube clamping mechanism 10 further comprises a sensor 700 and a controller (not shown), wherein the sensor 700 is connected to the main body 100 for detecting status information of any of the drive assembly 200, the extrusion 500 and the fluid in the infusion tube 20. The controller is connected to the main body 100, electrically connected to the driving assembly 200 and the sensor 700, and used for controlling the driving assembly 200 to operate according to the status information. At this time, the infusion tube clamping mechanism 10 can obtain the current flow rate of the liquid in the infusion tube 20 through the sensor 700, and the controller controls the operation of the driving assembly 200 to achieve the effect of precisely controlling the flow rate of the liquid in the infusion tube 20.

It is understood that the sensor 700 is one of an elastic deformation sensor, a movement distance sensor, a zero sensor, a flow rate sensor, and the like. When the sensor 700 is an elastic deformation sensor, a motion distance sensor, a zero sensor, or the like, which cannot directly obtain the flow rate information in the infusion tube 20, the controller thereof needs to include an information storage part (not shown in the figure), and the flow rate of the infusion tube 20 with the material, the size, and the shape in the corresponding intermediate information is recorded in the information storage part. For example, when the sensor 700 is a zero sensor in the embodiment, if the driving assembly 200 includes the screw motor 210, the zero sensor can detect the intermediate information of the number of turns of the screw motor 210. When the fluid flow rate of the fluid delivery tube clamping mechanism 10 needs to be controlled, the zero sensor transmits intermediate information to the information storage part, the information storage part compares the intermediate information to obtain the current flow rate (for example, the information storage part stores the fluid delivery tube 20 which is made of rubber and has the diameter of 8mm, and when the intermediate information is "the motor rotates for 10 circles", the fluid flow rate in the fluid delivery tube 20 is 0.5m/s ", so that when the fluid delivery tube 20 used in actual operation is made of rubber and has the diameter of 8mm, and the sensor 700 detects the intermediate information of" the motor rotates for 10 circles ", the information storage part can judge that the current fluid flow rate of the fluid delivery tube 20 is 0.5 m/s), and the controller can judge the direction and the number of turns of the screw motor 210 which are required to rotate when the extrusion 500 is pushed or reset according to the current flow rate value and the target flow rate value, and control the screw motor 210 to rotate to complete the control of the fluid flow rate in the fluid delivery tube 20.

In order to solve the above technical problem, an embodiment of the present utility model further provides an infusion device (not shown in the drawings), where the infusion device employs the infusion tube clamping mechanism 10 according to any one of the above embodiments. Therefore, the first elastic piece 300 is arranged between the driving module and the extrusion piece 500 in the infusion device, and the first elastic piece 300 can play a role in buffering force through deformation of the first elastic piece so as to alleviate the instant force born by the infusion tube 20 after the extrusion piece 500 is abutted against the infusion tube 20, so that the infusion device can avoid damage caused by overlarge stress of the infusion tube 20.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many variations, modifications, combinations, substitutions and alterations of these embodiments may be made without departing from the principles and spirit of the utility model, the scope of which is defined in the claims and their equivalents.

Claims (10)

1. The infusion tube clamping mechanism is characterized by comprising a main body, a driving assembly, a first elastic piece, an extrusion piece and a limiting piece, wherein one end of the main body is provided with the limiting piece, the other end of the main body is provided with the driving assembly, and the first elastic piece and the extrusion piece are movably arranged between the limiting piece and the driving assembly;

the driving assembly is used for driving the first elastic piece to enable the first elastic piece to drive the extrusion piece to move towards the limiting piece;

the limiting piece is used for clamping the infusion tube in a matched mode with the extrusion piece.

2. The infusion tube clamping mechanism according to claim 1, further comprising a second elastic member having one end disposed at an end of the body adjacent to the stopper and the other end disposed at the extrusion for urging the extrusion to return.

3. The infusion tube gripping device of claim 1, wherein the drive assembly includes a drive member, a displacement member coupled to the drive member, the drive member for driving the displacement member to reciprocate between the drive member and the first resilient member, the first resilient member coupled to the displacement member at one end and to the expression member at the other end.

4. The infusion tube clamping mechanism according to claim 1, wherein a moving channel is arranged in the main body, the driving assembly comprises a screw motor and a sliding block, a screw of the screw motor extends into the moving channel and is connected with the sliding block, the first elastic piece and the extrusion piece are all located in the moving channel, and the screw motor, the sliding block, the first elastic piece, the extrusion piece and the limiting piece are all distributed in a straight line along the length direction of the moving channel.

5. The infusion tube clamping mechanism according to claim 1, wherein a first limiting groove is provided in an end of the extrusion facing the first elastic member, the first limiting groove being shaped and sized to fit the first elastic member, the first elastic member being partially disposed in the first limiting groove.

6. The infusion tube clamping mechanism according to claim 1, wherein the limiting member is provided with a second limiting groove for accommodating the infusion tube, an abutting portion is provided at an end of the pressing member adjacent to the second limiting groove, and a shape of the abutting portion is adapted to a shape of the second limiting groove.

7. The infusion tube gripping device of claim 6, wherein the second limiting groove is semi-circular in cross-sectional shape.

8. The infusion tube gripping device of claim 1, further comprising a sensor, a controller;

the sensor is connected to the main body and is used for detecting state information of any one of the driving assembly, the extrusion piece and the liquid in the infusion tube;

the controller is connected to the main body, is electrically connected with the driving assembly and the sensor, and is used for controlling the driving assembly to operate according to the state information.

9. The infusion tube gripping device of claim 8, wherein the sensor is a zero sensor.

10. An infusion device comprising the infusion tube gripping mechanism of any one of claims 1 to 9.