CN221084343U

CN221084343U - Driving structure for extruding and transfusion of pipeline and electronic transfusion pump

Info

Publication number: CN221084343U
Application number: CN202322009210.4U
Authority: CN
Inventors: 孙亮
Original assignee: Shandong Weigao Group Medical Polymer Co Ltd
Current assignee: Shandong Weigao Group Medical Polymer Co Ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2024-06-07
Anticipated expiration: 2033-07-28

Abstract

The utility model belongs to the technical field of medical equipment infusion, in particular to a driving structure for extruding and infusing a pipeline, which comprises a motor, an infusion pipeline and a transmission part connected with an output shaft of the motor, wherein the transmission part comprises a wheel shaft connected with the output shaft of the motor, a cam is sleeved outside the wheel shaft, each cam corresponds to a corresponding pump sheet, a retainer is arranged between each cam and each pump sheet, the pump sheets and a spring are arranged in the corresponding retainer, the pump sheets can slide in the corresponding retainers, and the electronic infusion pump applying the former reduces the influence of part size precision, assembly error and part abrasion on the infusion precision through an integral flexible full-extrusion scheme, thereby ensuring the stability of the infusion precision.

Description

Driving structure for extruding and transfusion of pipeline and electronic transfusion pump

Technical Field

The utility model belongs to the technical field of medical equipment infusion, and particularly relates to a driving structure for extruding and infusing a pipeline and an electronic infusion pump.

Background

The basic principle adopted when the electronic infusion pump type product is used for infusion is that two liquid stop pump sheets and one liquid extrusion pump sheet are matched to move back and forth to continuously extrude an infusion pipeline for infusion, but the structure is often subjected to extrusion amplitude change caused by assembly clearance of the pump sheets and cams, diameter size fluctuation of the produced infusion pipeline, abrasion of the pump sheets and a cam shaft, and the like, and engineering errors which are impossible to completely eliminate in the aspects of pump body and medicine box installation clearance can lead to serious fluctuation of infusion precision, and in order to reduce the fluctuation, the engineering precision improvement requirement can greatly increase the manufacturing cost, and the objective problems can not be effectively eliminated. Therefore, the influence of these problems on the infusion accuracy needs to be effectively suppressed from the design end to one of the studies.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a driving structure for extruding and transfusion on a pipeline and an electronic transfusion pump applying the driving structure, which have the advantages of simple structure and convenient use and solve the problems in the prior art.

The utility model provides the following technical scheme: the utility model provides a carry out extrusion transfusion's drive structure to pipeline, a drive structure to carry out extrusion transfusion to the pipeline, includes motor and infusion pipeline, still includes the transmission part with motor output shaft, the transmission part include with motor output shaft's shaft, the shaft overcoat is equipped with the cam, the cam corresponds corresponding respectively the pump piece, every the cam with be equipped with the holder between the pump piece, pump piece and spring are installed in the holder, the pump piece can correspond the holder internal sliding.

The pump sheet comprises a square liquid squeezing pump sheet and at least two thin liquid stopping pump sheets, and at least one liquid stopping pump sheet is arranged on two sides of the liquid squeezing pump sheet respectively.

And a plurality of cam pieces with integrated cams.

The retainer comprises two liquid-stopping retainers and one liquid-squeezing retainer, wherein the liquid-squeezing retainer is positioned between the two liquid-stopping retainers, the liquid-squeezing retainer corresponds to the liquid-squeezing pump sheet, and the liquid-stopping retainer corresponds to the liquid-stopping pump sheet.

The middle of the cam piece is a first cavity which penetrates through the cam piece, the wheel shaft is located in the first cavity, and the wheel shaft can drive the cam piece to synchronously rotate.

And a silica gel sheath is sleeved outside the motor.

The motor output shaft is connected with the wheel shaft through a metal insert arranged in the middle code disc.

The excircle notch on the code wheel is combined with a sensor of the sensor plate to detect the rotation state.

The liquid stopping pump sheet comprises a tip part acting on a liquid conveying pipeline and a base arranged in the liquid stopping retainer, a fourth cavity is formed in the base and used for accommodating one end of the spring, the other end of the spring is connected with the inner wall of the end wall of the fourth cavity, a base limiting block is arranged on the side wall of the base, a limiting groove matched with the base limiting block is formed in the corresponding position of the side wall of the liquid stopping retainer, the cam can drive the base limiting block to slide in the limiting groove, the liquid extruding pump sheet comprises a square part acting on the liquid conveying pipeline and a connecting part located in the liquid extruding retainer, a hook part is arranged at the lower end part of the connecting part, the connecting part can slide in the sliding groove of the liquid extruding retainer, the liquid extruding retainer comprises a connector and a frame leg, and the frame leg is used for being connected with the cam piece.

The electronic infusion pump comprises any driving structure for extruding and infusing the pipeline, and further comprises a shell and a driving part, wherein the driving part is integrated with a medicine box mounting position sensor, a pipeline bubble sensor and a pipeline pressure sensor.

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

According to the driving structure for extruding and transfusion on the pipeline and the electronic transfusion pump using the driving structure, the pump sheet is divided into the two thin liquid stopping pump sheets and the square liquid extruding pump sheet, wherein the thin liquid stopping pump sheet can reduce the abrasion caused by the rotation of the cam when the pressure of liquid in the transfusion pipeline is transmitted to the cam through the pump sheet, the spring arranged in the square liquid extruding pump sheet can realize flexible full extrusion, the damage caused by hard extrusion on the transfusion pipeline by a fixed interval size can be reduced through the flexible full extrusion mode, meanwhile, the error of assembly gaps caused by various production and operation can be compensated, and the transfusion precision problem caused by the fluctuation of the relative position size of the pump sheet and the pipeline due to the abrasion of moving parts can be offset;

Meanwhile, the springs are also arranged in the two narrow liquid stop pump sheets, and through the matching of the three pump sheets, not only can the enough transfusion pressure be maintained, but also the requirement on the transfusion precision in the whole life cycle can be met, and the requirements on the size precision and the assembly precision of each engineering part are reduced.

Drawings

FIG. 1 is a schematic perspective view of a driving structure for squeeze infusion of a tube according to embodiment 1 of the present utility model;

FIG. 2 is a schematic sectional view showing a driving part of a driving structure for performing squeeze infusion on a tube according to embodiment 1 of the present utility model;

FIG. 3 is a schematic view showing a structure of a liquid stopping pump sheet of a driving structure for performing squeeze infusion on a tube according to embodiment 1 of the present utility model;

FIG. 4 is a schematic view showing a combination of a liquid stop pump sheet and a liquid stop retainer of a driving structure for performing squeeze infusion on a tube according to embodiment 1 of the present utility model;

FIG. 5 is a schematic sectional view showing a combination of a liquid-stopping pump sheet and a liquid-stopping retainer of a driving structure for performing squeeze infusion on a tube according to embodiment 1 of the present utility model;

FIG. 6 is a schematic view of a liquid squeezing cage of a driving structure for squeezing and infusing a liquid through a pipe according to embodiment 1 of the present utility model;

FIG. 7 is a schematic cross-sectional view of a liquid squeezing pump sheet and a liquid squeezing holder of a driving structure for squeezing and infusing a tube according to embodiment 1 of the present utility model;

FIG. 8 is a schematic view showing a combination of a cam member and a wheel shaft of a driving structure for squeeze infusion of a tube according to embodiment 1 of the present utility model;

FIG. 9 is a schematic diagram showing a combination of a code wheel and a metal nest of a driving structure for performing squeeze infusion on a pipeline according to embodiment 1 of the present utility model;

FIG. 10 is a schematic view showing an exploded structure of an upper part of an electric infusion pump according to embodiment 3 of the present utility model;

fig. 11 is a schematic diagram showing a split structure of an electric infusion pump according to embodiment 3 of the present utility model.

In the figure: 1. a transmission part; 10. a liquid stopping pump sheet; 101. a tip portion; 102. a base; 1021. a base limiting block; 1022. a fourth chamber;

11. a liquid stop retainer 111 and a limit groove; 112. a spring;

12. A liquid squeezing pump sheet; 121. a square part; 1211. an upper connecting block; 1212. a fifth chamber; 122. a connection part; 1221. a hook portion;

13. A liquid extrusion retainer; 131. a connector; 1311. a lower connecting block; 1312. a sliding groove; 132. a frame leg; 1321. a first leg; 1322. a second leg;

14. A wheel axle; 15. a cam; 151. a first cam; 152. a second cam; 153. a third cam;

16. A code wheel; 17. metal nesting; 18. a sensor plate;

2. A motor; 21. a silica gel sheath;

3. an upper case; 4. a lower case; 5. detecting bubbles; 6. a PCB board; 7. a cover plate; 8. an infusion pipeline.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the prior art, the transfusion pipeline is directly extruded to the bottom mechanically by a pump sheet in a scheme such as a full extrusion mode, the scheme easily causes excessive rigid pressure on the transfusion pipeline, and poor rebound of the pipeline is easily caused after repeated extrusion, so that the quantity of transfusion extruded each time is influenced, and the transfusion precision is seriously influenced by the reduction of the elastic service life of the transfusion pipeline;

The rebound life of the infusion pipeline can be effectively protected by adopting a semi-extrusion mode, but the size of the infusion quantity extruded each time is determined by the principle of precisely controlling the spacing between the pump sheet and the infusion pipeline, and in the mode, when the cam for driving the pump sheet is worn, the assembly clearance error of each part and the like can cause uncontrollable spacing between the pump sheet and the infusion pipeline, and meanwhile, when medical staff combines a pump body according to a new medicine box each time, the fluctuation of the spacing between the pump sheet and the pipeline can be caused, and the irremovable errors can influence the infusion precision of the semi-extrusion.

Specific example 1: referring to fig. 1-9, a driving structure for squeezing and infusing a tube includes a transmission part 1, wherein the transmission part 1 includes a liquid stopping pump 10 and a squeezing pump 12, and springs 112 are arranged in each pump assembly, as shown in fig. 1, wherein the squeezing pump 12 is square, and the liquid stopping pump 10 is thin;

The thin liquid stopping pump sheet 10 can reduce the pressure of the liquid in the infusion pipeline 8, the pressure is transmitted to the cam 15 through the pump sheet, so that the cam 15 is worn during rotation, the acting area of the thin liquid stopping pump sheet 10 on the infusion pipeline 8 is small, higher pressure is generated, the liquid stopping can be more effectively stopped, higher hydraulic pressure is output, and the two thin pump sheets can be matched to move, so that no liquid backflow occurs in the whole movement period.

The driving structure for extruding and transfusion of the pipeline, as shown in fig. 2, further comprises a power input end such as a motor 2 or a battery, wherein a silica gel sheath 21 is sleeved outside the motor 2 to reduce torque deflection and noise generated by movement, a motor output shaft is connected with a wheel shaft 14 through a metal insert arranged in a middle code disc 16, a metal shaft for strengthening rigidity is embedded in the wheel shaft 14, three cams 15 which are integrally formed outside the wheel shaft 14 form a cam piece, the three cams 15 are different in size, each cam 15 has own movement rhythm, each metal connecting piece of the cam piece and an integrally formed process can ensure compact and reliable structure, the three cams 15 sequentially correspond to a liquid stopping plate 10 and a liquid extruding plate 12, the first cam 151 and the third cam 153 sequentially correspond to the liquid stopping plate 10 for convenience in description, the second cam 152 corresponds to the middle liquid extruding plate 12, the middle of the cam piece is a first cavity through, the wheel shaft 14 is positioned in the first cavity, the wheel shaft 14 can drive the cam piece to synchronously rotate, namely, the wheel shaft 14 rotates the cam piece is driven by the rotation of the cam 15, so that the corresponding liquid stopping plate 10 and the liquid extruding plate 12 can automatically rotate, and the liquid extruding pump 8 or the liquid extruding plate 8 can automatically reach the liquid extruding and stopping plate 8.

As shown in fig. 3, the liquid stop pump sheet 10 includes a tip 101 acting on the infusion line 8 and a base 102 connected to the liquid stop holder 11, two base stoppers 1021 symmetrically disposed are disposed on the side wall of the base 102, the further the protruding height of the base stopper 1021 is from the tip 101, the smaller the protruding height is, a cavity is disposed in the base 102, and for convenience of description, a fourth cavity 1022 is defined, one end of the spring 112 is located in the fourth cavity 1022, and the other end is located in the liquid stop holder 11.

As shown in fig. 4, in the state of the combination of the liquid pump sheet 10 and the liquid stop holder, fig. 5 is a sectional view of the combination of the two, the base 102 is positioned in the liquid stop holder 11, the base stopper 1021 is clamped into the limiting groove 111 on the side wall of the liquid stop holder 11, the cam 15 acts on the end part bulge of the liquid stop holder 11, the liquid stop holder 11 drives the liquid stop pump sheet 10 to move together towards the transfusion management, the tip 101 acts on the transfusion pipeline 8, and the flexible extrusion and abrasion compensation dimensions of the liquid stop pump sheet 10 and the holder and the spring 112 are output through the relative movement of the liquid stop pump sheet and the holder, so that the distance between the liquid stop pump sheet and the transfusion pipe is adjusted automatically.

As shown in fig. 6, which is a schematic structural diagram of the squeeze liquid holder 13, the squeeze liquid holder 13 includes a frame leg 132 connected with a cam member and a connector 131 connected with the squeeze liquid pump 12, the frame leg 132 includes a first frame leg 1321 and a second frame leg 1322, the same frame leg 132 has a similar U-shaped structure, two first frame legs 1321 disposed opposite to each other on the same frame leg 132 are clamped on the outer diameter of the cam member, a lower connecting block 1311 is disposed in the connector 131, and a sliding groove 1312 is disposed in the connector 131 of the squeeze liquid holder 13.

As shown in fig. 7, the assembled cross-sectional view of the squeeze pump sheet 12 and the squeeze holder 13 is schematically shown, the squeeze pump sheet 12 includes a square portion 121 acting on the squeeze pipe and a connection portion 122 connected to the squeeze holder 13, an upper connection block 1211 is disposed on an inner wall of an end surface of the square portion 121, a fifth cavity 1212 is disposed in the square portion 121, a spring 112 is disposed in the fifth cavity 1212, one end of the spring 112 is connected to the upper connection block 1211, the lower end is connected to the lower connection block 1311, the connection portion 122 at a lower portion of the squeeze pump sheet 12 is disposed in the sliding groove 1312 of the squeeze holder 13, a hook portion 1221 is disposed at one end of the connection portion 122, and a portion of the hook portion 1221 protrudes from the sliding groove 1312 and is disposed between two second legs 1322 disposed opposite to the same side.

Fig. 8 is a schematic structural diagram of an assembled wheel axle 14 and a cam member, as shown in fig. 8, the three cams 15 are in an integral structure, the middle of the cam member is a first cavity penetrating through, the wheel axle 14 is located in the first cavity, the middle cams 15 in the drawings are respectively defined as second cams 152 for convenience of description, the cams correspond to the liquid squeezing pump 12, the cams 15 on two sides are respectively a first cam 151 and a third cam 153, and the cams correspond to the liquid stopping pump 10. The axle 14 may be integrally injection molded with the cam member, either as a boss and recess, or as a threaded connection.

Fig. 9 is a schematic diagram of an assembled structure of a code wheel 16 and a metal nest 17, wherein a notch is arranged on an outer circle of the code wheel 16, one end of the metal nest 17 is connected with the code wheel 16, the other end is connected with a first cavity of a cam member, a second cavity and a third cavity are arranged in the first cavity, the second cavity is used for accommodating a wheel shaft 14, the third cavity is used for accommodating one end of the metal nest 17, and the sizes of the second cavity and the third cavity are related to the outer diameter of an object accommodated by the second cavity and the third cavity.

Working principle: a retainer is designed between each cam 15 and the pump blade, the pump blade and the spring 112 are installed in the retainer, the fixed extrusion and withdrawal distance of the pump blade is output through the sliding friction movement of the retainer and the cam 15, and the flexible extrusion and abrasion compensation sizes are output through the relative movement of the pump blade, the retainer and the spring 112, so that the distance between the pump blade and the infusion tube is self-adjusted.

Meanwhile, the driving part integrates the driving part with a medicine box mounting position sensor, a pipeline bubble sensor and a pipeline pressure sensor, so that the infusion safety can be further ensured.

Specific example 2: the present embodiment differs from embodiment 1 in that the outer circumferential notch of the code wheel 16 can detect the rotation state in conjunction with the sensor of the sensor plate 18.

Specific example 3: as shown in fig. 10 and 11, this embodiment is an electric infusion pump, and a driving structure for performing squeeze infusion on a tube in embodiment 1 or 2 is adopted, and a combination of the driving structure for performing squeeze infusion on the tube and the electric infusion pump is as shown in fig. 11, and fixation is achieved through corresponding bayonets and slots. The electric infusion pump further comprises a shell, the shell is divided into an upper shell 3 and a lower shell 4, the front end of the lower shell 4 is provided with a corresponding groove, the position of the components is limited in an auxiliary mode by matching with a liquid stopping pump sheet 10, a liquid squeezing pump sheet 12, a bubble detection sheet 5, a sensor plate 18 and the like, the components can extend out of the lower shell 4 and act on the area where an infusion pipeline 8 is located, the excircle notch of a code wheel 16 can be combined with the sensor of the sensor plate 18 to detect the rotating state, one end of a transmission part 1 is connected with a motor 2 or a battery, the other end of the transmission part 1 is connected with a bubble detection sheet 5, one end of the PCB 6 is connected with a cover plate 7 in the electric infusion pump, and the electric infusion pump further comprises a driving part, wherein the driving part is integrated with a medicine box installation position sensor, a pipeline bubble sensor and a pipeline pressure sensor, and infusion safety can be further guaranteed.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a drive structure that extrudees infusion is carried out to pipeline, includes motor and infusion pipeline, its characterized in that: the motor is characterized by further comprising a transmission part connected with an output shaft of the motor, the transmission part comprises an axle connected with the output shaft of the motor, a cam is sleeved outside the axle, the cams respectively correspond to corresponding pump sheets, a retainer is arranged between each cam and each pump sheet, the pump sheets and springs are installed in the retainers, and the pump sheets can slide in the corresponding retainers.

2. A driving structure for squeeze infusion of a tube according to claim 1, wherein: the pump sheet comprises a square liquid squeezing pump sheet and at least two thin liquid stopping pump sheets, and at least one liquid stopping pump sheet is arranged on two sides of the liquid squeezing pump sheet respectively.

3. A driving structure for squeeze infusion of a tube according to claim 1, wherein: and a plurality of cam pieces with integrated cams.

4. A driving structure for squeeze infusion of a tube according to claim 2, wherein: the retainer comprises two liquid-stopping retainers and one liquid-squeezing retainer, wherein the liquid-squeezing retainer is positioned between the two liquid-stopping retainers, the liquid-squeezing retainer corresponds to the liquid-squeezing pump sheet, and the liquid-stopping retainer corresponds to the liquid-stopping pump sheet.

5. The drive structure for squeeze infusion of a tube according to claim 4, wherein: the middle of the cam piece is a first cavity which penetrates through the cam piece, the wheel shaft is located in the first cavity, and the wheel shaft can drive the cam piece to synchronously rotate.

6. A driving structure for squeeze infusion of a tube according to claim 1, wherein: and a silica gel sheath is sleeved outside the motor.

7. A driving structure for squeeze infusion of a tube according to claim 1, wherein: the motor output shaft is connected with the wheel shaft through a metal insert arranged in the middle code disc.

8. A drive structure for squeeze infusion of a tube as set forth in claim 7, wherein: the excircle notch on the code wheel is combined with a sensor of the sensor plate to detect the rotation state.

9. The drive structure for squeeze infusion of a tube according to claim 4, wherein: the liquid stopping pump sheet comprises a tip part acting on the infusion pipeline and a base arranged in the liquid stopping retainer, a fourth cavity is arranged in the base and used for accommodating one end of the spring, the other end of the spring is connected with the inner wall of the end wall of the fourth cavity, a base limiting block is arranged on the side wall of the base, a limiting groove matched with the base limiting block is formed in the corresponding position of the side wall of the liquid stopping retainer, the cam rotates to drive the base limiting block to slide in the limiting groove, the liquid pressing pump sheet comprises a square part acting on the infusion pipeline and a connecting part located in the liquid pressing retainer, a hook part is arranged at the lower end part of the connecting part, the connecting part can slide in the sliding groove of the liquid pressing retainer, the liquid pressing retainer comprises a connector and a frame leg, and the frame leg is used for being connected with the cam piece.

10. An electronic infusion pump, characterized in that: a drive structure for squeeze infusion of a tube comprising a pair of tubes as claimed in any one of claims 1 to 9, further comprising a housing and a drive portion integrating a cartridge mounting position sensor, a tube bubble sensor, a tube pressure sensor.