CN215083364U

CN215083364U - Infusion pump and pressing plate mechanism thereof

Info

Publication number: CN215083364U
Application number: CN202120636452.4U
Authority: CN
Inventors: 李晓维; 扈钧; 谢超群; 雷文斌
Original assignee: Shenzhen Comen Medical Instruments Co Ltd
Current assignee: Shenzhen Comen Medical Instruments Co Ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-12-10
Anticipated expiration: 2031-03-29

Abstract

The embodiment of the utility model discloses transfer pump and clamp plate mechanism thereof. The transfer pump includes transfer line, clamp plate mechanism and peristaltic mechanism, the transfer line sets up clamp plate mechanism with between the peristaltic mechanism, the peristaltic mechanism presses to clamp plate mechanism to the extrusion the transfer line, clamp plate mechanism include clamp plate, base and pretension subassembly, clamp plate swing joint be in on the base, the pretension subassembly along transfer line axial direction will the clamp plate top is tight, so that the clamp plate is relative the base is only along the perpendicular to the planar direction in clamp plate place removes to improve the infusion precision of transfer pump.

Description

Infusion pump and pressing plate mechanism thereof

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to an infusion pump and clamp plate mechanism thereof.

Background

In some medical injections, infusion pumps are required to perform infusion due to the special condition of patients and strict requirements on the infusion rate of certain medical liquids. In the pump door pressing plate mechanism of the infusion pump in the prior art, the pressing plate realizes free floating through an elastic part. Because the pressing plate mechanism has an assembly gap, the pressing plate can generate micro motion along the axial direction of the infusion tube under the driving of the peristaltic mechanism during working, so that the velocity curve of the liquid flow in the infusion tube is not ideal, and the infusion precision of the infusion pump is lower.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an infusion pump and pressure plate mechanism thereof for solve the not enough problem of infusion precision among the prior art.

The utility model provides an infusion pump pressure plate mechanism for bear the transfer line, pressure plate mechanism includes base, clamp plate and pretension subassembly, the clamp plate activity sets up on the base, the pretension subassembly along the axial direction of transfer line will the clamp plate top is tight, so that the clamp plate is relative the base only is along the perpendicular to the planar direction in clamp plate place removes.

Optionally, the pretensioning assembly comprises a pretensioning plate and a pretensioning screw, and the pretensioning screw pushes the pretensioning plate to move along the axial direction of the infusion tube, so that the pressure plate moves relative to the base only along the direction perpendicular to the plane of the pressure plate.

Optionally, the base includes a bottom surface and a limiting plate perpendicular to the bottom surface, the pre-tightening plate is arranged at an interval with the limiting plate along the axial direction of the infusion tube, the pre-tightening plate is arranged parallel to and at an interval with the limiting plate, and the pressing plate moves between the limiting plate and the pre-tightening plate.

Optionally, the base is further provided with a guide shaft, the axial direction of the guide shaft is parallel to the axial direction of the infusion tube, and the pre-tightening plate is sleeved on the guide shaft and slides along the axial direction of the guide shaft.

Optionally, a rolling assembly is arranged on the pressing plate and comprises a rotating shaft and a guide bearing, the guide bearing is sleeved on the rotating shaft, the rotating shaft is connected to the pressing plate, the pressing plate is attracted along a direction perpendicular to the plane of the pressing plate, when the pressing plate moves, the guide bearing is opposite to the limiting plate and the pre-tightening plate rolls.

Optionally, the guide bearings are symmetrically distributed along the moving direction of the pressure plate.

Optionally, the pressing plate is disposed in a cavity defined by the limiting plate, the bottom surface and the pre-tightening plate, a spring is disposed between the pressing plate and the base, and two ends of the spring are respectively connected to the pressing plate and the bottom surface.

Optionally, the axial direction of the spring is perpendicular to the direction of the plane of the pressure plate.

Optionally, a limit screw is arranged on the pressure plate, and the limit screw is used for limiting the displacement of the pressure plate moving along the direction perpendicular to the axial direction of the infusion tube and parallel to the plane where the pressure plate is located.

An infusion pump comprises a peristaltic mechanism and a pressure plate mechanism of the infusion pump, wherein an infusion tube is arranged between the pressure plate mechanism and the peristaltic mechanism.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

after having adopted above-mentioned transfer pump clamp plate mechanism, the pretension subassembly along the axial direction of transfer line will the clamp plate top is tight, so that the clamp plate is relative the base only moves along the perpendicular to the planar direction in clamp plate place, improves the infusion precision of transfer pump.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 is a schematic structural view of an infusion pump including a platen mechanism provided by the present invention.

Fig. 2 is a schematic structural diagram of the pressing plate structure in the embodiment shown in fig. 1.

Fig. 3 is a schematic cross-sectional view of the platen structure in the embodiment shown in fig. 2.

In the figure: 10. a transfusion tube; 20. a peristaltic mechanism; 30. a platen mechanism; 31. pressing a plate; 311. a rotating shaft; 312. a guide bearing; 32. a base; 321. a limiting plate; 331. pre-tightening the screw; 332. pre-tightening the plate; 334. a guide shaft; 335. a guide screw; 34. a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, as a specific embodiment of the present invention, the infusion pump includes an infusion tube 10, a peristaltic mechanism 20, a pressing plate mechanism 30 and a driving mechanism for driving the peristaltic mechanism 20, the infusion tube 10 is disposed between the pressing plate mechanism 30 and the peristaltic mechanism 20, the peristaltic mechanism 20 presses the pressing plate mechanism 30 to extrude the infusion tube 10, the pressing plate mechanism 30 includes a pressing plate 31, a base 32 and a pre-tightening component, the pressing plate 31 is movably connected to the base 32, and the pre-tightening component tightly presses the pressing plate 31 along an axial direction of the infusion tube 10, so that the pressing plate 31 moves relative to the base 32 only along a direction perpendicular to the axial direction of the infusion tube 10.

When the infusion tube pressing device works, the driving mechanism drives the peristaltic mechanism 20 to tightly press the infusion tube 10 on the pressing plate 31 with a certain acting force, and the acting point of the acting force moves along the axial direction of the infusion tube 10, and the pressing plate 31 is slightly moved along the direction perpendicular to the axial direction of the infusion tube 10 in work due to the fact that the pressing plate 31 connected with the base 32 through the spring 34 has an assembling gap. The pre-tightening component is added, and the back pressure plate 31 can only move in parallel along the direction vertical to the axis of the infusion tube 10 under the constraint of the pre-tightening component, so that the flow rate of liquid in the infusion tube 10 can be ensured to meet a preset equation more stably when a driving mechanism motor driving the peristaltic mechanism 20 rotates at a fixed rotating speed.

Referring to fig. 2 and 3, as an embodiment of the present invention, the pre-tightening assembly includes a pre-tightening plate 332 and a pre-tightening screw 331, and the pre-tightening screw 331 pushes the pre-tightening plate 332 to move along the axial direction of the infusion tube 10 so that the pressing plate 31 moves relative to the base 32 only along the direction perpendicular to the axial direction of the infusion tube 10.

As a specific embodiment of the present invention, the base 32 includes a bottom surface and a limiting plate 321 perpendicular to the bottom surface, the pre-tightening plate 332 is disposed at an interval with the limiting plate 321 along the axial direction of the infusion tube 10, the pre-tightening plate 332 is parallel to the limiting plate 321 and disposed at an interval with the pre-tightening plate 332, and the pressing plate 31 moves under the limitation of the limiting plate 321 and the pre-tightening plate 332.

Further, the base 32 is provided with a guide shaft 334, the axial direction of the guide shaft 334 is parallel to the axial direction of the infusion tube 10, and the pretensioning plate 332 is sleeved on the guide shaft 334 and slides along the axial direction of the guide shaft 334. The guide shaft 334 controls the pressing direction of the preload plate 332 to be always along the axial direction of the infusion tube 10, so as to cancel the degree of freedom of the pressure plate 31 in the axial direction of the infusion tube 10.

As a specific embodiment of the present invention, the connection between the pressing plate 31 and the limiting plate 321 and the connection between the pressing plate 31 and the pre-tightening plate 332 are all provided with a rolling assembly. The rolling assemblies are arranged at two ends of the pressing plate 31 and are respectively abutted to the limiting plate 321 and the pre-tightening plate 332, so that friction force is reduced, and movement is smoother.

Optionally, the rolling assembly includes a rotating shaft 311 and a guiding bearing 312, the guiding bearing 312 is sleeved on the rotating shaft 311, the rotating shaft 311 is connected to the pressing plate 31, and the guiding bearing 312 rolls relative to the limiting plate 321 and the pre-tightening plate 332 when the pressing plate 31 moves along a direction perpendicular to the axial direction of the infusion tube 10. The guide bearing 312 converts the sliding motion of the platen 31 into a circumferential rolling motion, reducing the frictional force.

Alternatively, the guide bearings 312 are symmetrically distributed along the moving direction of the platen 31.

As a specific embodiment of the present invention, the pressing plate 31 is disposed in the cavity enclosed by the limiting plate 321, the bottom surface and the pre-tightening plate 332, and the two ends of the spring 34 are respectively connected between the pressing plate 31 and the bottom surface.

In one embodiment of the present invention, a spring 34 is disposed between the pressing plate 31 and the base 32, and the axial direction of the spring 34 is perpendicular to the axial direction of the infusion tube 10. The pressure plate 31 reciprocates in a direction toward and away from the peristaltic mechanism 20, and the spring 34 provides a return preload force to the pressure plate 31.

As a specific embodiment of the present invention, a limit screw is disposed on the pressing plate 31, and the limit screw is used to limit the axial movement displacement of the pressing plate 31 along the spring 34.

As a specific implementation of the utility model, the effort of spring 34 is used on clamp plate 31 during the assembly, and it is spacing to it at opposite direction with guide screw 335 simultaneously, and guide bearing 312 is installed to the symmetry on clamp plate 31, and guide bearing 312 laminates with limiting plate 321 of base 32, pretension plate 332's pretension board 332 respectively, and pretension screw 331 promotes pretension plate 332 and compresses tightly clamp plate 31 to limiting plate 321, makes clamp plate 31 only can be along spring 34 axial to be parallel translation.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides an infusion pump clamp plate mechanism for bear the transfer line, its characterized in that: the pressing plate mechanism comprises a base, a pressing plate and a pre-tightening assembly, the pressing plate is movably arranged on the base, and the pre-tightening assembly tightly pushes the pressing plate along the axial direction of the infusion tube, so that the pressing plate can move relative to the base only along the direction perpendicular to the plane where the pressing plate is located.

2. The infusion pump platen mechanism of claim 1, wherein: the pretension component comprises a pretension plate and a pretension screw, and the pretension screw pushes the pretension plate to move along the axial direction of the infusion tube, so that the pressure plate moves relative to the base only along the direction perpendicular to the plane of the pressure plate.

3. The infusion pump platen mechanism of claim 2, wherein: the base comprises a bottom surface and a limiting plate perpendicular to the bottom surface, the pre-tightening plate and the limiting plate are arranged at intervals along the axial direction of the infusion tube, the pre-tightening plate is parallel to the limiting plate and is arranged at intervals, and the pressing plate moves between the limiting plate and the pre-tightening plate.

4. The infusion pump platen mechanism of claim 3, wherein: the base is also provided with a guide shaft, the axial direction of the guide shaft is parallel to the axial direction of the infusion tube, and the pre-tightening plate is sleeved on the guide shaft and slides along the axial direction of the guide shaft.

5. The infusion pump platen mechanism according to any one of claims 1 to 4, wherein: the pressing plate is provided with a rolling assembly, the rolling assembly comprises a rotating shaft and a guide bearing, the guide bearing is sleeved on the rotating shaft, the rotating shaft is connected to the pressing plate, the pressing plate is sucked along the direction perpendicular to the plane of the pressing plate, when the pressing plate moves, the guide bearing is opposite to the limiting plate and the pre-tightening plate rolls.

6. The infusion pump platen mechanism of claim 5, wherein: the guide bearings are symmetrically distributed along the moving direction of the pressure plate.

7. The infusion pump platen mechanism of claim 5, wherein: the pressing plate is arranged in a cavity defined by the limiting plate, the bottom surface and the pre-tightening plate, a spring is arranged between the pressing plate and the base, and two ends of the spring are respectively connected to the pressing plate and the bottom surface.

8. The infusion pump platen mechanism of claim 7, wherein: the axial direction of the spring is perpendicular to the direction of the plane of the pressure plate.

9. The infusion pump platen mechanism of claim 1, wherein: the pressure plate is provided with a limit screw which is used for limiting the displacement of the pressure plate along the direction which is vertical to the axial direction of the infusion tube and is parallel to the plane where the pressure plate is located.

10. An infusion pump, characterized in that: the infusion pump pressing plate mechanism comprises a peristaltic mechanism and the infusion pump pressing plate mechanism as claimed in any one of claims 1 to 9, and an infusion tube is arranged between the pressing plate mechanism and the peristaltic mechanism.