Transfusion speed controller

Abstract

The invention relates to an infusion speed controller which comprises a shell, an infusion device, a clamping device and a power device. The infusion device comprises a disc base, a T-shaped liquid inlet pipe, a T-shaped liquid discharge pipe, a first arc-shaped sliding groove, a second arc-shaped sliding groove, a first through hole, a second through hole, a third through hole, a fourth through hole, a first arc-shaped sliding block and a second arc-shaped sliding block, wherein the first through hole and the second through hole are formed in the T-shaped liquid inlet pipe, the third through hole and the fourth through hole are formed in the T-shaped liquid discharge pipe, the first arc-shaped sliding block is arranged in the first arc-shaped sliding groove, and the second arc-shaped sliding block is arranged in the second arc-shaped sliding groove. The fifth through hole, the sixth through hole, the seventh through hole and the eighth through hole are formed in the disc base, the ninth through hole is formed in the first arc-shaped sliding block, the tenth through hole is formed in the second arc-shaped sliding block, and the insertion hole is formed in the push rod. The power device comprises a main shaft, a rotating disc, an inserting rod, a hollow hemisphere, a base, a first transmission shaft, a speed changing assembly, a T-shaped rotating plate, an arc-shaped limiting plate, an elastic rod, a plurality of limiting grooves formed in the hollow hemisphere and a plurality of open grooves.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an infusion speed controller. Background Art

[0002] Flow rate control during infusion is very important. A reasonable flow rate helps improve the efficacy and reduce the risks during infusion. In clinical practice, when the condition is serious or there is a special need, the flow rate will be given, and special medications require the flow rate to be accurate to the "drop". For example, when infusing patients with heart failure, elderly patients, and critically ill patients, if the infusion speed is too fast, too much fluid enters the body per unit time or the drug dose is too large, it will induce heart failure, blood pressure drops too quickly, etc., causing the patient's condition to worsen. If the infusion speed is too slow, insufficient fluid enters the body per unit time or the drug dose is too small, it will lead to an inability to correct shock and high blood pressure.

[0003] The basic principle of existing infusion flow rate regulators is roughly the same, which is to adjust the flow rate by squeezing the infusion catheter to deform it and change the cross-sectional area of ​​the catheter. This adjustment method is simple and can achieve stepless adjustment of the flow rate, but it is difficult to accurately measure the flow rate. The flow rate adjustment depends more on the operator's experience rather than the flow rate regulator itself. It cannot be used when precise control of the flow rate is required. Summary of the invention

[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide an infusion speed controller, including a housing, an infusion device detachably arranged outside the housing, a clamping device arranged on the housing and used to fix the infusion device, and a power device arranged in the housing and used to drive the infusion device;

[0006] The infusion device comprises a disc seat, a T-shaped liquid inlet pipe fixedly arranged on the disc seat, a T-shaped liquid discharge pipe symmetrical to the T-shaped liquid inlet pipe and fixedly arranged on the disc seat, a first through hole and a second through hole arranged on the T-shaped liquid inlet pipe, a third through hole and a fourth through hole arranged on the T-shaped liquid discharge pipe, a first arc-shaped slide groove and a second arc-shaped slide groove symmetrically arranged on the disc seat, a first arc-shaped slider slidably arranged in the first arc-shaped slide groove, a second arc-shaped slider slidably arranged in the second arc-shaped slide groove, a fifth through hole and a sixth through hole, a seventh through hole and an eighth through hole arranged on the disc seat, a ninth through hole arranged on the first arc-shaped slider through hole, a tenth through hole provided on the second arc-shaped slider, a piston cavity whose two ends are respectively fixed on the first arc-shaped slider and the second arc-shaped slider, a piston plate movably provided in the piston cavity, a push rod movably inserted into the piston cavity and one end of which is fixed on the piston plate, and a plug hole provided on the other end of the push rod; the ninth through hole and the tenth through hole are simultaneously connected to the piston cavity; the first through hole is overlapped with the fifth through hole, the second through hole is overlapped with the sixth through hole, the third through hole is overlapped with the seventh through hole, and the fourth through hole is overlapped with the eighth through hole;

[0007] The power device includes a main shaft rotatably arranged on the shell, a turntable fixedly mounted on the main shaft, an insertion rod eccentrically rotatably arranged on the turntable, a hollow hemisphere located in the shell and fixedly mounted on the main shaft, a plurality of limit grooves and a plurality of slots equidistantly annularly distributed on the hollow hemisphere, a base fixedly arranged inside the shell, a first transmission shaft rotatably arranged on the base, a speed change assembly arranged in the shell and used to drive the first transmission shaft to rotate, a T-shaped rotating plate fixedly arranged on the first transmission shaft, an arc-shaped limit plate rotatably arranged in the limit groove and fixedly arranged on the T-shaped rotating plate, and an elastic rod with one end fixedly arranged on the T-shaped rotating plate; the plurality of limit grooves and the plurality of slots are arranged alternately.

[0008] Specifically, the infusion device also includes a first extension groove corresponding to the fifth through hole and arranged on the disc seat, a second extension groove corresponding to the sixth through hole and arranged on the disc seat, a third extension groove corresponding to the seventh through hole and arranged on the disc seat, a fourth extension groove corresponding to the eighth through hole and arranged on the disc seat, two first springs whose two ends are respectively fixed on the disc seat and the first arc-shaped slider, and two second springs whose two ends are respectively fixed on the disc seat and the second arc-shaped slider.

[0009] Specifically, the speed change assembly includes a second transmission shaft which is arranged below the first transmission shaft and rotatably arranged on the base, a motor which is fixedly arranged in the housing and used to drive the second transmission shaft to rotate, a first gear, a second gear and a third gear which are fixedly sleeved on the first transmission shaft, a fourth gear, a fifth gear and a sixth gear which are sleeved on the outside of the second transmission shaft and rotatably arranged on the housing, a first hollow U-shaped frame which corresponds to the fourth gear and is fixedly arranged on the inner wall of the housing, a second hollow U-shaped frame which corresponds to the fifth gear and is fixedly arranged on the inner wall of the housing, a third hollow U-shaped frame which corresponds to the sixth gear and is fixedly arranged on the inner wall of the housing, two first hollow telescopic rods which have one end fixedly arranged on the first hollow U-shaped frame and are connected thereto, and one end fixedly arranged on the second hollow U-shaped frame and is connected thereto. Two second hollow telescopic rods connected to each other, two third hollow telescopic rods with one end fixed on the third hollow U-shaped frame and connected thereto, a first ring body fixed on the other end of the two first hollow telescopic rods, a second ring body fixed on the other end of the two second hollow telescopic rods, a third ring body fixed on the other end of the two third hollow telescopic rods, a first friction plate rotatably arranged on the first ring body and movably arranged on the second transmission shaft, a second friction plate rotatably arranged on the second ring body and movably arranged on the second transmission shaft, and a third friction plate rotatably arranged on the third ring body and movably arranged on the second transmission shaft; the first gear is meshed with the fourth gear, the second gear is meshed with the fifth gear, and the third gear is meshed with the sixth gear.

[0010] Specifically, the speed change assembly also includes a first push plate with one end movably inserted into the first hollow U-shaped frame, a second push plate with one end movably inserted into the second hollow U-shaped frame, a third push plate with one end movably inserted into the third hollow U-shaped frame, a first through slot, a second through slot and a third through slot provided on the shell, a first rod body with one end fixed on the first push plate and the other end movably provided in the first through slot, a second rod body with one end fixed on the second push plate and the other end movably provided in the second through slot, a third rod body with one end fixed on the third push plate and the other end movably provided in the third through slot, an adjusting rod movably provided on the shell, a band provided on the adjusting rod, a fourth through slot provided on the adjusting rod, a first screw rod rotatably provided on the shell at both ends and passed through the adjusting rod; the first rod body, the second rod body and the third rod body are simultaneously passed through the fourth through slot.

[0011] Specifically, the clamping device includes a first clamping seat and a second clamping seat movably arranged on the shell, a second screw rod rotatably arranged on the shell and with both ends respectively passing through the first clamping seat and the second clamping seat, two first clamping assemblies symmetrically arranged on the first clamping seat, and two second clamping assemblies symmetrically arranged on the second clamping seat; one end of the second screw rod is provided with a positive thread and the other end is provided with a reverse thread; the first clamping assembly has the same structure as the second clamping assembly, and the first clamping assembly includes a guide rod with one end fixedly arranged on the first clamping seat, A first top plate movably mounted on the guide rod and movably mounted on the shell, a third spring mounted on the guide rod and having two ends respectively fixed on the first clamping seat and the first top plate, a second top plate fixed on the first top plate, a third top plate movably mounted on the first top plate, a fourth spring with two ends respectively fixed on the first top plate and the third top plate, an inclined block movably mounted on the third top plate, a fifth spring with two ends respectively fixed on the inclined block and the third top plate, an extension plate with one end fixed on the first clamping seat, and a roller rotatably mounted on the extension plate.

[0012] The beneficial effects of the present invention are:

[0013] The push rod is driven by a power device to rotate while pushing the piston plate to reciprocate in the piston cavity, and the piston cavity is reciprocated as a whole, driving the first arc-shaped slider and the second arc-shaped slider to reciprocate in the first arc-shaped slide groove and the second arc-shaped slide groove respectively. When the ninth through hole on the first arc-shaped slider gradually coincides with the first through hole, the tenth through hole on the second arc-shaped slider gradually coincides with the fourth through hole, and the piston plate moves toward the tenth through hole, pushing the liquid medicine in the piston cavity into the T-shaped liquid discharge pipe through the tenth through hole, and sucking the liquid medicine in the T-shaped liquid inlet pipe into the piston cavity through the ninth through hole; when the ninth through hole on the first arc-shaped slider gradually coincides with the third through hole, the tenth through hole on the second arc-shaped slider gradually coincides with the fourth through hole. The step coincides with the second through hole, and the piston plate moves toward the ninth through hole at the same time, pushing the medicine in the piston cavity into the T-shaped discharge tube through the ninth through hole, and sucking the medicine in the T-shaped entry tube into the piston cavity through the tenth through hole; the above arrangement realizes the one-way delivery of the medicine, and the overall continuity is good, and the problem of the delivery of the medicine being affected by the height of the medicine bottle can be avoided. For example, when the patient needs to lift the medicine bottle when going to the toilet, the height of the medicine bottle is unstable, which may cause the change of the infusion flow rate or the diversion of the medicine, which can be solved by the above structure, the overall delivery is stable, and the delivery of the medicine is more accurate. The speed of the reciprocating movement of the piston plate is controlled by the power device, and finally the delivery speed of the medicine is controlled, and quantitative delivery is achieved at the same time;

[0014] The first transmission shaft is driven by the speed change assembly to rotate one circle, so that the T-shaped rotating plate rotates one circle. During the process, the arc limit plate rotates, so that the arc limit plate is disengaged from the limit groove, and then the elastic rod is rotated so that the elastic rod is located in the slot, moves along the slot and drives the hollow hemisphere to rotate one grid as a whole, one grid being the distance between adjacent slots, so that the main shaft rotates one grid, drives the turntable to rotate one grid, and makes the insertion rod rotate one grid with the main shaft as the axis, drives the push rod to rotate, and at the same time the piston plate moves a distance, which is the amount of one drop of liquid medicine. When the insertion rod rotates one circle with the main shaft, the piston plate is located in the piston cavity and reciprocates once to complete the injection of several drops of liquid medicine. The intermittent liquid medicine injection is arranged through the above-mentioned setting to avoid the occurrence of large or small rotation angles of the main shaft. During the stop of the main shaft, the hollow hemisphere is limited and fixed by the arc limit plate and the limit groove, so that the liquid medicine control is more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0016] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0017] In the attached picture:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a front schematic diagram of the present invention;

[0020] Figure 3 for Figure 2 A in the enlarged view;

[0021] Figure 4 for Figure 2 The cross-sectional view of line AA in the figure;

[0022] Figure 5 for Figure 4 The cross-sectional view of line BB in FIG.

[0023] Figure 6 for Figure 2 A partial cross-sectional view of the CC line in FIG.

[0024] Figure 7 It is a schematic diagram of the reverse side of the present invention;

[0025] Figure 8 is a schematic diagram of the structure of the clamping device;

[0026] Fig. 9 for Figure 8 The enlarged view of point B in the figure;

[0027] Fig.10 It is a schematic diagram of the structure of the power unit;

[0028] Fig.11 is a schematic diagram of the structure of the speed change assembly;

[0029] Fig.12 It is a schematic diagram of the structure of a T-shaped liquid inlet pipe and a T-shaped liquid discharge pipe. DETAILED DESCRIPTION

[0030] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0031] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0032] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0033] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0034] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] Reference Figure 1-12 As shown, an infusion speed controller of the present invention comprises a housing 1, an infusion device 2 detachably arranged outside the housing, a clamping device 3 arranged on the housing and used to fix the infusion device, and a power device 4 arranged in the housing and used to drive the infusion device;

[0036] The infusion device 2 includes a disc seat 21, a T-shaped liquid inlet pipe 22 fixedly arranged on the disc seat, a T-shaped liquid discharge pipe 23 symmetrical to the T-shaped liquid inlet pipe and fixedly arranged on the disc seat, a first through hole 24 and a second through hole 25 arranged on the T-shaped liquid inlet pipe, a third through hole 26 and a fourth through hole 27 arranged on the T-shaped liquid discharge pipe, a first arc-shaped slide groove 28 and a second arc-shaped slide groove 29 symmetrically arranged on the disc seat, a first arc-shaped slider 210 slidably arranged in the first arc-shaped slide groove, a second arc-shaped slider 211 slidably arranged in the second arc-shaped slide groove, a fifth through hole 212 and a sixth through hole 213 and a seventh through hole 214 and an eighth through hole 215 arranged on the disc seat, and a A ninth through hole 216 on the first arc-shaped slider, a tenth through hole 217 provided on the second arc-shaped slider, a piston cavity 218 whose two ends are respectively fixed on the first arc-shaped slider and the second arc-shaped slider, a piston plate 219 movably provided in the piston cavity, a push rod 220 movably inserted into the piston cavity and one end of which is fixed on the piston plate, and a plug hole 221 provided on the other end of the push rod; the ninth through hole and the tenth through hole are simultaneously connected to the piston cavity; the first through hole is overlapped with the fifth through hole, the second through hole is overlapped with the sixth through hole, the third through hole is overlapped with the seventh through hole, and the fourth through hole is overlapped with the eighth through hole;

[0037] The power device 4 includes a main shaft 41 rotatably arranged on the shell, a turntable 42 fixedly sleeved on the main shaft, an insertion rod 43 eccentrically rotatably arranged on the turntable, a hollow hemisphere 44 located in the shell and fixedly sleeved on the main shaft, a plurality of limit grooves 45 and a plurality of slots 46 equidistantly annularly distributed on the hollow hemisphere, a base 47 fixedly arranged inside the shell, a first transmission shaft 48 rotatably arranged on the base, a speed change assembly 49 arranged in the shell and used to drive the first transmission shaft to rotate, a T-shaped rotating plate 410 fixedly arranged on the first transmission shaft, an arc-shaped limit plate 411 rotatably arranged in the limit groove and fixedly arranged on the T-shaped rotating plate, and an elastic rod 412 with one end fixedly arranged on the T-shaped rotating plate; a plurality of the limit grooves and a plurality of the slots are staggered;

[0038] The infusion device is fixed to the outside of the shell by a clamping device, and the fixation is convenient, fast and firm. The T-shaped liquid inlet tube on the infusion device is connected to the medicine bottle, and the T-shaped liquid discharge tube is connected to the intravenous indwelling needle. Later, only the infusion device needs to be replaced. The push rod is driven by a power device to rotate and push the piston plate to move back and forth in the piston cavity, and at the same time, the piston cavity is reciprocated as a whole, driving the first arc-shaped slider and the second arc-shaped slider to move back and forth in the first arc-shaped slide groove and the second arc-shaped slide groove respectively. When the ninth through hole on the first arc-shaped slider gradually coincides with the first through hole, the tenth through hole on the second arc-shaped slider gradually coincides with the fourth through hole, and at the same time, the piston plate moves toward the tenth through hole, pushing the medicine liquid in the piston cavity through the tenth through hole into the T-shaped liquid discharge tube, and sucking the medicine liquid in the T-shaped liquid inlet tube into the piston cavity through the ninth through hole; when When the ninth through hole on the first arc-shaped slider gradually overlaps with the third through hole, the tenth through hole on the second arc-shaped slider gradually overlaps with the second through hole, and at the same time, the piston plate moves toward the ninth through hole, pushing the medicine liquid in the piston cavity into the T-shaped discharge tube through the ninth through hole, and sucking the medicine liquid in the T-shaped entry tube into the piston cavity through the tenth through hole; the above arrangement realizes the one-way delivery of the medicine liquid, and the overall continuity is good, and the problem of the delivery of the medicine liquid being affected by the height of the medicine bottle can be avoided. For example, when the patient needs to lift the medicine bottle when going to the toilet, the height of the medicine bottle is unstable, which may cause the change of the infusion flow rate or the diversion of the medicine liquid. The above structure can solve all these problems, and the overall delivery is stable, and the delivery of the medicine liquid is more accurate. The speed of the reciprocating movement of the piston plate is controlled by the power device, and finally the delivery speed of the medicine liquid is controlled, and quantitative delivery is achieved at the same time;

[0039] The first transmission shaft is driven by the speed change assembly to rotate one circle, so that the T-shaped rotating plate rotates one circle. During the process, the arc limit plate rotates, so that the arc limit plate is disengaged from the limit groove, and then the elastic rod is rotated so that the elastic rod is located in the slot, moves along the slot and drives the hollow hemisphere to rotate one grid as a whole, one grid being the distance between adjacent slots, so that the main shaft rotates one grid, drives the turntable to rotate one grid, and makes the insertion rod rotate one grid with the main shaft as the axis, drives the push rod to rotate, and at the same time the piston plate moves a distance, which is the amount of one drop of liquid medicine. When the insertion rod rotates one circle with the main shaft, the piston plate is located in the piston cavity and reciprocates once to complete the injection of several drops of liquid medicine. The intermittent liquid medicine injection is arranged through the above-mentioned setting to avoid the occurrence of large or small rotation angles of the main shaft. During the stop of the main shaft, the hollow hemisphere is limited and fixed by the arc limit plate and the limit groove, so that the liquid medicine control is more precise.

[0040] Specifically, the infusion device 2 further includes a first extension groove 222 corresponding to the fifth through hole and disposed on the disc seat, a second extension groove 223 corresponding to the sixth through hole and disposed on the disc seat, a third extension groove 224 corresponding to the seventh through hole and disposed on the disc seat, a fourth extension groove 225 corresponding to the eighth through hole and disposed on the disc seat, two first springs 226 whose two ends are respectively fixed on the disc seat and the first arc-shaped slider, and two second springs 227 whose two ends are respectively fixed on the disc seat and the second arc-shaped slider; through the first spring and the second The setting of the spring can improve the linkage of the reciprocating rotation of the first arc-shaped slider and the second arc-shaped slider. The setting of the first extension groove can extend the connection time between the ninth through hole and the fifth through hole. The fifth through hole overlaps with the first through hole, and finally the connection time between the ninth through hole and the first through hole is prolonged, ensuring that the medicine in the T-shaped liquid inlet pipe is sucked into the piston cavity. Similarly, the setting of the third extension groove extends the connection time between the ninth through hole and the third through hole when they gradually overlap, ensuring that the medicine in the piston cavity is discharged into the T-shaped liquid discharge pipe; the same applies to the second extension groove and the fourth extension groove.

[0041] Specifically, the speed change assembly 49 includes a second transmission shaft 491 disposed below the first transmission shaft and rotatably disposed on the base, a motor 492 fixedly disposed in the housing and used to drive the second transmission shaft to rotate, a first gear 493, a second gear 494, and a third gear 495 fixedly sleeved on the first transmission shaft, a fourth gear 496, a fifth gear 497, and a sixth gear 498 sleeved on the outside of the second transmission shaft and rotatably disposed on the housing, a first hollow U-shaped frame 499 corresponding to the fourth gear and fixedly disposed on the inner wall of the housing, a second hollow U-shaped frame 500 corresponding to the fifth gear and fixedly disposed on the inner wall of the housing, and a first gear 493, a second gear 494, and a third gear 495 fixedly sleeved on the first transmission shaft, and a fourth gear 496, a fifth gear 497, and a sixth gear 498 sleeved on the outside of the second transmission shaft and rotatably disposed on the housing, and a first hollow U-shaped frame 499 corresponding to the fourth gear and fixedly disposed on the inner wall of the housing, and ... a third hollow U-shaped frame 501 on the wall, two first hollow telescopic rods 502 with one end fixed on the first hollow U-shaped frame and connected thereto, two second hollow telescopic rods 503 with one end fixed on the second hollow U-shaped frame and connected thereto, two third hollow telescopic rods 504 with one end fixed on the third hollow U-shaped frame and connected thereto, a first ring body 505 fixed on the other end of the two first hollow telescopic rods, a second ring body 506 fixed on the other end of the two second hollow telescopic rods, a third ring body 507 fixed on the other end of the two third hollow telescopic rods, a first friction plate 508 rotatably provided on the first ring body and movably provided on the second transmission shaft, and a rotating A second friction plate 509 is movably arranged on the second ring body and movably arranged on the second transmission shaft, and a third friction plate 510 is rotatably arranged on the third ring body and movably arranged on the second transmission shaft; the first gear is meshed with the fourth gear, the second gear is meshed with the fifth gear, and the third gear is meshed with the sixth gear; the above-mentioned motor is purchased on the market; the speed change assembly 49 also includes a first push plate 511 that can be movably inserted into the first hollow U-shaped frame at one end, a second push plate 512 that can be movably inserted into the second hollow U-shaped frame at one end, a third push plate 513 that can be movably inserted into the third hollow U-shaped frame at one end, and a first push plate 511 on the shell. The through slot 514, the second through slot 515 and the third through slot 516, the first rod 517 with one end fixed on the first push plate and the other end movably arranged in the first through slot, the second rod 518 with one end fixed on the second push plate and the other end movably arranged in the second through slot, the third rod 519 with one end fixed on the third push plate and the other end movably arranged in the third through slot, the adjusting rod 520 movably arranged on the housing, the wave band 521 arranged on the adjusting rod, the fourth through slot 522 arranged on the adjusting rod, the first screw 523 with two ends rotatably arranged on the housing and penetrating the adjusting rod; the first rod, the second rod and the third rod are simultaneously penetrating the fourth through slot;The first screw is rotated to make the first screw drive the adjusting rod to move. When the band on the adjusting rod moves to the first rod body, the first rod body is pushed to move, so that the first rod body moves in the first through slot, and the first rod body moves from one end of the first through slot to the other end. The first rod body pushes the first push plate to move, so that the pressure in the first hollow U-shaped frame becomes larger, so that the two first hollow telescopic rods are extended, so that the first ring body moves toward the fourth gear, so that the first friction plate and one end surface of the fourth gear are in contact with each other and rubbed, and the motor is started. The motor drives the second transmission shaft to rotate, and drives the first friction plate, the second friction plate and the third friction plate to rotate together. Since the second friction plate and the third friction plate are not in contact with the fifth gear and the sixth gear, The first gear is fitted with the fourth gear, so that the first friction plate drives the fourth gear to rotate, and the fourth gear drives the first transmission shaft to rotate. The rotation of the first transmission shaft drives the second gear and the third gear to rotate, and the second gear and the third gear drive the fifth gear and the sixth gear to rotate respectively. Since the first gear is smaller than the second gear, the second gear is smaller than the third gear, the fourth gear is larger than the fifth gear, and the fifth gear is larger than the sixth gear, when the first friction plate is fitted with the fourth gear, the fourth gear drives the first gear to rotate as the main transmission, and when the second friction plate is fitted with the fifth gear, the fifth gear drives the second gear to rotate as the main transmission, thereby changing the rotation speed of the first transmission shaft and ultimately changing the injection speed of the liquid medicine. ;

[0042] Specifically, the clamping device 3 includes a first clamping seat 31 and a second clamping seat 32 movably arranged on the shell, a second screw rod 33 rotatably arranged on the shell and having two ends respectively passed through the first clamping seat and the second clamping seat, two first clamping assemblies 34 symmetrically arranged on the first clamping seat, and two second clamping assemblies 35 symmetrically arranged on the second clamping seat; one end of the second screw rod is provided with a positive thread and the other end is provided with a reverse thread; the first clamping assembly has the same structure as the second clamping assembly, and the first clamping assembly 34 includes a guide rod 341 with one end fixedly arranged on the first clamping seat, a guide rod 341 movably sleeved on the guide rod and movably arranged on the shell A first top plate 342 on the body, a third spring 343 sleeved on the guide rod and fixed at both ends on the first clamping seat and the first top plate, a second top plate 344 fixed on the first top plate, a third top plate 345 movably arranged on the first top plate, a fourth spring 346 fixed at both ends on the first top plate and the third top plate, a slanted block 347 movably arranged on the third top plate, a fifth spring 348 fixed at both ends on the slanted block and the third top plate, an extension plate 349 fixed at one end on the first clamping seat, and a roller 350 rotatably arranged on the extension plate; the second screw is rotated to make the first clamping seat and the second clamping seat approach each other. The first clamping seat is moved to fix the T-shaped liquid inlet pipe and the T-shaped liquid discharge pipe with the two first clamping components on the first clamping seat and the two second clamping components on the second clamping seat, and can calibrate the positions of the T-shaped liquid inlet pipe and the T-shaped liquid discharge pipe at the same time, so as to finally make the position of the disc seat more accurate, and make the position of the piston chamber accurate, thereby further improving the accuracy of the amount of liquid medicine injected; when the first clamping seat moves toward the direction of the T-shaped liquid inlet pipe, the first top plate is firstly made to contact with one end surface of the T-shaped liquid inlet pipe, and at this time, the second top plate is made to contact with the other end surface of the T-shaped liquid inlet pipe, and the first clamping seat continues to move, and the guide rod moves relative to the first top plate, so that the third spring is compressed, and the first top plate is pressed by the third spring The cam is moved by the third spring to move the first top plate to the T-shaped liquid inlet tube, and the cam is moved by the fourth spring to the fifth top plate to move the third top plate.

[0043] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. An infusion speed controller, characterized in that: It comprises a housing (1), an infusion device (2) detachably arranged outside the housing, a clamping device (3) arranged on the housing and used to fix the infusion device, and a power device (4) arranged inside the housing and used to drive the infusion device; The infusion device (2) comprises a disc seat (21), a T-shaped liquid inlet pipe (22) fixedly arranged on the disc seat, a T-shaped liquid discharge pipe (23) symmetrical to the T-shaped liquid inlet pipe and fixedly arranged on the disc seat, a first through hole (24) and a second through hole (25) arranged on the T-shaped liquid inlet pipe, a third through hole (26) and a fourth through hole (27) arranged on the T-shaped liquid discharge pipe, a first arc-shaped slide groove (28) and a second arc-shaped slide groove (29) symmetrically arranged on the disc seat, a first arc-shaped slider (210) slidably arranged in the first arc-shaped slide groove, a second arc-shaped slider (211) slidably arranged in the second arc-shaped slide groove, a fifth through hole (212) and a sixth through hole (213) and a seventh through hole (214) and an eighth through hole (215) arranged on the disc seat, A through hole (215), a ninth through hole (216) provided on the first arc-shaped slider, a tenth through hole (217) provided on the second arc-shaped slider, a piston cavity (218) whose two ends are respectively fixed on the first arc-shaped slider and the second arc-shaped slider, a piston plate (219) movably provided in the piston cavity, a push rod (220) movably inserted into the piston cavity and one end of which is fixed on the piston plate, and a plug hole (221) provided on the other end of the push rod; the ninth through hole and the tenth through hole are simultaneously connected to the piston cavity; the first through hole is overlapped with the fifth through hole, the second through hole is overlapped with the sixth through hole, the third through hole is overlapped with the seventh through hole, and the fourth through hole is overlapped with the eighth through hole; The power device (4) comprises a main shaft (41) rotatably arranged on a shell, a rotating disk (42) fixedly sleeved on the main shaft, an insert rod (43) eccentrically rotatably arranged on the rotating disk, a hollow hemisphere (44) located in the shell and fixedly sleeved on the main shaft, a plurality of limit grooves (45) and a plurality of slots (46) equidistantly annularly distributed on the hollow hemisphere, a base (47) fixedly arranged inside the shell, a first transmission shaft (48) rotatably arranged on the base, a speed change assembly (49) arranged in the shell and used to drive the first transmission shaft to rotate, a T-shaped rotating plate (410) fixedly arranged on the first transmission shaft, an arc-shaped limit plate (411) rotatably arranged in the limit groove and fixedly arranged on the T-shaped rotating plate, and an elastic rod (412) with one end fixedly arranged on the T-shaped rotating plate; the plurality of limit grooves and the plurality of slots are arranged alternately.

2. The infusion speed controller according to claim 1, characterized in that: The infusion device (2) further comprises a first extension groove (222) corresponding to the fifth through hole and arranged on the disc seat, a second extension groove (223) corresponding to the sixth through hole and arranged on the disc seat, a third extension groove (224) corresponding to the seventh through hole and arranged on the disc seat, a fourth extension groove (225) corresponding to the eighth through hole and arranged on the disc seat, two first springs (226) whose two ends are respectively fixed on the disc seat and the first arc-shaped sliding block, and two second springs (227) whose two ends are respectively fixed on the disc seat and the second arc-shaped sliding block.

3. The infusion speed controller according to claim 1, characterized in that: The speed change assembly (49) comprises a second transmission shaft (491) arranged below the first transmission shaft and rotatably arranged on the base, a motor (492) fixedly arranged in the housing and used for driving the second transmission shaft to rotate, a first gear (493) and a second gear (494) and a third gear (495) fixedly sleeved on the first transmission shaft, a fourth gear (496) and a fifth gear (497) and a sixth gear (498) sleeved on the outside of the second transmission shaft and rotatably arranged on the housing, a first hollow U-shaped frame (499) corresponding to the fourth gear and fixedly arranged on the inner wall of the housing, a second hollow U-shaped frame (500) corresponding to the fifth gear and fixedly arranged on the inner wall of the housing, a third hollow U-shaped frame (501) corresponding to the sixth gear and fixedly arranged on the inner wall of the housing, two first hollow telescopic rods (502) one end of which is fixedly arranged on the first hollow U-shaped frame and connected thereto, and one end of which is fixedly arranged on the second Two second hollow telescopic rods (503) on the hollow U-shaped frame and connected thereto, two third hollow telescopic rods (504) one end of which is fixedly arranged on the third hollow U-shaped frame and connected thereto, a first ring body (505) fixedly arranged on the other end of the two first hollow telescopic rods, a second ring body (506) fixedly arranged on the other end of the two second hollow telescopic rods, a third ring body (507) fixedly arranged on the other end of the two third hollow telescopic rods, a first friction plate (508) rotatably arranged on the first ring body and movably arranged on the second transmission shaft, a second friction plate (509) rotatably arranged on the second ring body and movably arranged on the second transmission shaft, and a third friction plate (510) rotatably arranged on the third ring body and movably arranged on the second transmission shaft; the first gear is meshed with the fourth gear, the second gear is meshed with the fifth gear, and the third gear is meshed with the sixth gear.

4. The infusion speed controller according to claim 3, characterized in that: The speed change assembly (49) further comprises a first push plate (511) with one end movably inserted into the first hollow U-shaped frame, a second push plate (512) with one end movably inserted into the second hollow U-shaped frame, a third push plate (513) with one end movably inserted into the third hollow U-shaped frame, a first through slot (514), a second through slot (515) and a third through slot (516) provided on the housing, a first rod (517) with one end fixedly provided on the first push plate and the other end movably provided in the first through slot, and a first rod (518) with one end fixedly provided on the housing. A second rod (518) is disposed on the second push plate and the other end of which is movably disposed in the second through slot, a third rod (519) is fixedly disposed on the third push plate at one end and the other end of which is movably disposed in the third through slot, an adjusting rod (520) is movably disposed on the housing, a band (521) is disposed on the adjusting rod, a fourth through slot (522) is disposed on the adjusting rod, and a first screw (523) is rotatably disposed on the housing at both ends and is passed through the adjusting rod; the first rod, the second rod and the third rod are simultaneously passed through the fourth through slot.

5. The infusion speed controller according to claim 1, characterized in that: The clamping device (3) comprises a first clamping seat (31) and a second clamping seat (32) movably arranged on the shell, a second screw (33) rotatably arranged on the shell and having two ends respectively passing through the first clamping seat and the second clamping seat, two first clamping assemblies (34) symmetrically arranged on the first clamping seat, and two second clamping assemblies (35) symmetrically arranged on the second clamping seat; one end of the second screw is provided with a positive thread and the other end is provided with a reverse thread; the first clamping assembly and the second clamping assembly have the same structure, the first clamping assembly (34) comprises a guide rod (341) with one end fixedly arranged on the first clamping seat, a guide rod (341) movably sleeved on the guide rod, and a guide rod (342) movably sleeved on the guide rod. A first top plate (342) is mounted on the rod and movably arranged on the shell body, a third spring (343) is sleeved on the guide rod and has two ends respectively fixed on the first clamping seat and the first top plate, a second top plate (344) is fixed on the first top plate, a third top plate (345) is movably arranged on the first top plate, a fourth spring (346) is respectively fixed on the first top plate and the third top plate at two ends, an inclined block (347) is movably arranged on the third top plate, a fifth spring (348) is respectively fixed on the inclined block and the third top plate at two ends, an extension plate (349) is fixed on the first clamping seat at one end, and a roller (350) is rotatably arranged on the extension plate.

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