An infusion pump with adjustable flow rate and flow rate regulator thereof

Abstract

An infusion pump with adjustable flow rate and its flow rate regulator, the flow rate regulator comprising an upper seat, a base, a knob and a sealing gasket; the upper seat is provided with a sliding rod sleeve slidably connected to an elastic liquid storage bag, the bottom of the sliding rod sleeve is provided with a dosing hole and a plurality of first liquid holes; the base is provided with a first through hole and a plurality of second liquid holes abutting against each other; the knob is provided with a second through hole, one end edge of the second through hole is provided with a positioning boss, and the other end edge is provided with an elastic sheet; the knob is provided with an annular groove, the annular groove is provided with a liquid outlet hole; the sealing gasket is provided with a plurality of channels connected to the annular groove, and by rotating the knob, different channels are connected to different second liquid holes. The present invention solves the limitation of the single flow rate function of the traditional infusion pump by integrating the adjustment function into the protective bottle, and solves the shortcomings of the flow regulating device of the prior art multi-flow rate infusion pump being bulky, located in the middle of the pipeline, and having redundant pipeline layout.

Description

Technical Field

[0001] The present invention relates to the technical field of infusion pumps, and in particular to an infusion pump with adjustable flow rate and a flow rate regulator thereof. Background Art

[0002] Single-flow-rate infusion pumps can only achieve a fixed flow rate output through manual mechanical devices (such as flow controllers), which makes it difficult to meet the precise needs of multi-dose, multi-stage infusions in complex treatment scenarios. For example, in the infusion of analgesics, antibiotics, or tumor drugs, patients may need to dynamically adjust the infusion rate according to their condition, while single-flow-rate infusion pumps rely on frequent intervention by medical staff, which can easily lead to fluctuations in drug concentrations due to operational errors and even cause adverse reactions. In addition, in the same hospital or department, different patients and different conditions may require the infusion of different drugs and different flow rates. Single-flow-rate infusion pumps are difficult to meet different needs, which leads to the need to purchase products of different models and types, which can easily cause confusion during use and increase the workload of the hospital's procurement and inventory departments. Therefore, the emergence of multi-flow-rate infusion pumps has been highly favored by the market.

[0003] In the prior art, publication number CN211798030U discloses a novel position-limited multi-flow rate controller that prevents accidental speed adjustment. Although flow rate switching is achieved through a mechanical multi-speed adjustment device, its multi-flow rate adjustment module uses a complex mechanical valve combination, requiring a large regulator (such as a knob-type step-down structure) to be installed in the middle of the infusion pipeline, resulting in a bloated overall device size and redundant pipeline layout. Furthermore, the gear switching accuracy of this type of mechanical multi-speed adjustment device is limited, and after long-term use, it is prone to flow rate deviation due to wear. Publication number CN110898286A discloses an adjustable flow rate infusion pump and its flow rate regulator. Although it can achieve different flow rate adjustments, the four guide tubes in the valve core are layered and staggered, requiring the valve core to be of sufficient thickness. Furthermore, the holes are multi-directional and elongated, making injection molding difficult and core extraction difficult during the injection molding process. In addition, in the above-mentioned existing technologies, the flow regulation structure of the multi-flow-rate infusion pump is located in the middle of the pipeline, which increases the burden on the patient when carrying it, and is prone to collision or pulling during movement, affecting the safety of infusion. At the same time, it limits the patient's freedom of movement and reduces the comfort of treatment. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide an infusion pump with adjustable flow rate and a flow rate regulator thereof. On the premise of ensuring the accuracy and safety of infusion, the integrated and miniaturized flow rate adjustment structure design is used to reduce the volume and facilitate portability, providing patients with a more flexible and comfortable treatment experience.

[0005] In a first aspect, the present invention provides a flow rate regulator, comprising an upper seat and a base connected to each other, wherein a knob is rotatably connected to the bottom of the base, and a sealing gasket is embedded between the knob and the base;

[0006] The upper seat is provided with a slide rod sleeve which is slidably connected to the elastic liquid storage bag, and the bottom of the slide rod sleeve is provided with a dosing hole and a plurality of first liquid holes;

[0007] The base is provided with a first through hole and a plurality of second liquid holes abutting against each other, wherein the first through hole corresponds to the position of the dosing hole, each second liquid hole is connected to a corresponding first liquid hole via a flow limiting tube, and the other end of the first through hole extends to form a snap post;

[0008] A second through hole is provided in the knob, a positioning boss is provided at one end edge of the second through hole, the sealing gasket is sleeved on the positioning boss, and an elastic sheet is provided at the other end edge to be buckled and connected with the buckle column;

[0009] An annular groove is provided on the contact surface between the knob and the sealing gasket, and a liquid outlet hole is provided in the annular groove;

[0010] The sealing gasket is provided with a plurality of channels communicating with the annular groove. By rotating the knob, different channels are communicated with different second liquid holes.

[0011] Preferably, the upper seat includes an upper base plate and an upper ring outer wall connected to the base, the sliding rod sleeve is located on one surface of the upper base plate, and an upper boss is provided on the other surface of the upper base plate, and the dosing hole and the first liquid hole are located in the upper boss.

[0012] Preferably, the flow limiting tube is made of soft material and has an inner diameter of 0.05 mm to 0.2 mm.

[0013] Preferably, the base comprises a lower bottom plate and a lower ring outer wall connected to the upper ring outer wall, a sink groove is provided on one surface of the lower bottom plate, and the buckle column is provided on the other surface;

[0014] A plurality of liquid-passing columns abutting against each other are provided on the edge of the sink, and each second liquid-passing hole is located in one of the liquid-passing columns.

[0015] Preferably, an annular buckle groove is provided in the buckle column, and the elastic sheet is clamped in the annular buckle groove.

[0016] Preferably, a key seat is provided at the edge of the lower base plate, and a key hole is provided in the key seat;

[0017] A gap is left between the outer wall of the sink and the key seat, and the outer wall of the knob is located in the gap;

[0018] An elastic anti-rotation buckle is provided on the outer wall of the sink, and the movable end of the elastic anti-rotation buckle extends into the keyhole;

[0019] The outer wall of the knob is provided with a plurality of scale lines, and the top of the outer wall is provided with a plurality of anti-rotation grooves, each of the anti-rotation grooves is located at the top of a scale line, and the elastic anti-rotation buckle is located in one of the anti-rotation grooves;

[0020] A key is provided in the keyhole. When the key is inserted into the keyhole and the elastic anti-rotation buckle is lifted, the knob can be rotated.

[0021] Preferably, the key comprises a main body and a pressing panel connected to each other, and the main body is provided with a control slope for lifting the elastic anti-rotation buckle.

[0022] Preferably, the inclination angle of the control slope is 20°~70°.

[0023] In a second aspect, the present invention provides an infusion pump with adjustable flow rate, comprising a protective bottle, a liquid filter, an automatic control component, a three-way connector, a liquid outlet connector and a protective cap connected in sequence by a flexible tube, and the above-mentioned flow rate regulator;

[0024] The bottom of the protective bottle is connected to the upper seat, the dosing hole is connected to the dosing connector, and the liquid outlet is connected to the liquid filter;

[0025] A sliding rod is slidably provided in the sliding rod sleeve, one end of the elastic liquid storage bag is fixed to the bottom of the sliding rod sleeve, and the other end is fixed to the top of the sliding rod.

[0026] Preferably, the elastic liquid storage capsule is made of elastic silicone material, and in an unpressurized state, is wrapped around the slide rod and the slide rod cover in a straight cylindrical shape, and expands into an ellipsoidal spherical shape after adding medicine.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] By integrating the adjustment function into the protective bottle, it not only solves the single flow rate function limitation of the traditional infusion pump, but also solves the shortcomings of the flow adjustment device of the multi-flow rate infusion pump in the existing technology, which is bulky, located in the middle of the pipeline, and has redundant pipeline layout. At the same time, it avoids the disadvantages of the flow adjustment device of the multi-flow rate infusion pump in the existing technology that is prone to collision or pulling during movement, affecting the safety and comfort of infusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of the infusion pump with adjustable flow rate in the present invention;

[0030] Figure 2 for Figure 1Cross-sectional view of a medium flow rate regulator;

[0031] Figure 3 for Figure 1 Exploded view of a medium flow rate regulator;

[0032] Figure 4 for Figure 3 Schematic diagram of the structure of the middle and upper seats;

[0033] Figure 5 for Figure 3 Schematic diagram of the structure of the middle base;

[0034] Figure 6 for Figure 3 Schematic diagram of the structure of the middle knob;

[0035] Figure 7 for Figure 3 Schematic diagram of the structure of the middle sealing gasket;

[0036] Figure 8 for Figure 3 Schematic diagram of the structure of the middle key;

[0037] Figure 9 This is a schematic diagram of the elastic anti-rotation buckle being lifted up after the key is inserted into the keyhole;

[0038] Figure 10 Schematic diagram of the connection between the second liquid passage hole 1 A1 to the second liquid passage hole 3 A3 and the channel 1 B1 to the channel 9 B9 under different flow rate conditions.

[0039] Description of main component symbols:

[0040] 10-protective bottle; 11-liquid filter; 12-automatic control component; 13-tee connector; 14-liquid outlet connector; 15-protective cap; 16-flow rate regulator; 17-dosing connector;

[0041] 161-upper seat; 1611-upper base plate; 1612-upper ring outer wall; 1613-upper boss;

[0042] 162 - Base; 1621 - First through hole; 1622 - Buckle column; 16221 - Annular buckle groove; 1623 - Lower base plate; 16231 - Positioning bump; 1624 - Lower ring outer wall; 1625 - Sink; 1626 - Liquid column; 1627 - Key seat; 1628 - Keyhole; 1629 - Elastic anti-rotation buckle;

[0043] 163 - knob; 1631 - second through hole; 1632 - positioning boss; 1633 - elastic sheet; 1634 - annular groove; 1635 - liquid outlet;

[0044] 164 - Sealing pad; 165 - Elastic liquid storage bag; 166 - Sliding rod sleeve; 1661 - Dosing hole; 1662 - First liquid hole; 1663 - Sliding rod; 167 - Flow limiting tube; 168 - Key; 1681 - Main body; 1682 - Press panel; 1683 - Control ramp;

[0045] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0046] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0047] See also Figure 1 An embodiment of the present invention provides an infusion pump with adjustable flow rate, including a protective bottle 10, a liquid filter 11, an automatic control component 12, a three-way connector 13, a liquid outlet connector 14 and a protective cap 15, and a flow rate regulator 16, which are connected in sequence through a hose.

[0048] Specifically, the automatic control component 12 stores a fixed volume of liquid medicine. When needed, the fixed volume of liquid medicine can be injected into the human body by pressing a switch on the automatic control component 12. After the injection into the human body, the automatic control component 12 will automatically store the fixed volume of liquid medicine again after a period of time.

[0049] See also Figures 2 to 7 The flow rate regulator 16 includes an upper seat 161 and a base 162 connected to each other. The bottom of the base 162 is rotatably connected to a knob 163, and a sealing gasket 164 is embedded between the knob 163 and the base 162;

[0050] The upper seat 161 is provided with a slide rod sleeve 166 that is slidably connected to the elastic liquid storage bag 165. The bottom of the slide rod sleeve 166 is provided with a dosing hole 1661 and a plurality of first liquid holes 1662.

[0051] The base 162 is provided with a first through hole 1621 and a plurality of second liquid holes abutting against each other. The first through hole 1621 corresponds to the position of the dosing hole 1661. Each second liquid hole is connected to a corresponding first liquid hole 1662 via a flow restrictor 167. The other end of the first through hole 1621 extends to form a snap post 1622.

[0052] The knob 163 defines a second through hole 1631 , and a positioning boss 1632 is provided at one end edge of the second through hole 1631 . The sealing gasket 164 is sleeved on the positioning boss 1632 , and an elastic piece 1633 is provided at the other end edge to be snap-fitted with the snap post 1622 .

[0053] An annular groove 1634 is provided on the contact surface between the knob 163 and the sealing gasket 164 , and a liquid outlet hole 1635 is provided in the annular groove 1634 ;

[0054] The sealing gasket 164 is surrounded by a plurality of channels communicating with the annular groove 1634 . By rotating the knob 163 , different channels are connected to different second liquid holes.

[0055] Specifically, the sealing gasket 164 is made of an elastomer, and its outer surface is coated with medical silicone oil for lubrication and maintenance. The sealing gasket 164 is interference-fitted between the base 162 and the knob 163 to form a seal therebetween.

[0056] Furthermore, an inner ring sealing rib and an outer ring sealing rib are respectively provided on the two end surfaces of the sealing gasket 164, and a plurality of channels are located between the inner ring sealing rib and the outer ring sealing rib, thereby enhancing the sealing effect.

[0057] See also Figure 2 and Figure 3 The bottom of the protective bottle 10 is connected to the upper seat 161, the dosing hole 1661 is connected to the dosing connector 17 through the first through hole 1621, and the liquid outlet 1635 is connected to the liquid filter through a hose;

[0058] A sliding rod 1663 is slidably provided in the sliding rod sleeve 166 , and one end of the elastic liquid storage capsule 165 is fixed to the bottom of the sliding rod sleeve 166 , and the other end is fixed to the top of the sliding rod 1663 .

[0059] In a preferred embodiment of the present application, the elastic liquid storage bladder 165 is made of elastic silicone material. Elastic silicone rings are provided at both ends to tightly fit the elastic liquid storage bladder 165 around the slide rod 1663 and the slide rod cover 166, creating a sealed seal at both ends of the elastic liquid storage bladder 165. In the unpressurized state, the elastic liquid storage bladder 165 is cylindrical and wraps around the slide rod 1663 and the slide rod cover 166. Upon application of the drug, the elastic liquid storage bladder 165 expands into an ellipsoidal spherical shape.

[0060] It should be noted that, in the present application, the dosing connector 17 is a needle-free connector, which has the characteristics of being detachable from the syringe and self-sealing. During use, the syringe filled with liquid medicine is connected to the dosing connector 17. After the syringe is pushed, the liquid medicine flows through the dosing connector 17, the pipeline, the dosing hole 1661, the slide sleeve 166, and finally reaches the elastic liquid storage bag 165, expanding the elastic liquid storage bag 165. The top end slides upward with the slide rod 1663, and the liquid medicine is stored in the elastic liquid storage bag 165. After the dosing is completed, the syringe and the dosing connector 17 are separated, and the dosing connector 17 automatically closes the channel. At the same time, the liquid medicine in the elastic liquid storage bag 165 is compressed by the elastic wrapping force of the elastic liquid storage bag 165, and flows through the first liquid hole 1662, the flow limiting tube 167, the second liquid hole, the channel, the annular groove 1634, the liquid outlet hole 1635, the pipeline, the liquid filter 11, the automatic control component 12, the three-way connector 13, the liquid outlet connector 14, and finally enters the human body through the human body catheter connected to the liquid outlet connector 14.

[0061] See also Figures 2 to 4 The upper seat 161 includes an upper base plate 1611 and an upper ring outer wall 1612 connected to the base 162. The slide rod sleeve 166 is located on one surface of the upper base plate 1611. An upper boss 1613 is provided on the other surface of the upper base plate 1611. The dosing hole 1661 and the first liquid hole 1662 are located in the upper boss 1613.

[0062] See also Figures 2 to 5 The base 162 includes a lower bottom plate 1623 and a lower ring outer wall 1624 connected to the upper ring outer wall 1612. A sink 1625 is provided on one surface of the lower bottom plate 1623, and the buckle column 1622 is provided on the other surface.

[0063] A plurality of liquid-passing columns 1626 abutting against each other are provided on the edge of the sink 1625 , and each second liquid-passing hole is located in one of the liquid-passing columns 1626 .

[0064] It should be noted that the inner wall of the upper ring outer wall 1612 is respectively snap-fitted with the outer wall of the lower ring outer wall 1624 and the bottom outer wall of the bottle protector 10, and is reinforced by glue at the same time to achieve a sealing effect.

[0065] In a preferred embodiment of the present application, an annular buckle groove 16221 is defined in the buckle column 1622 , and the elastic piece 1633 is locked in the annular buckle groove 16221 .

[0066] During installation, first install the sealing gasket 164 in the knob 163, then use the buckle column 1622 to stretch the end of the elastic sheet 1633, and then the end of the elastic sheet 1633 is clamped in the annular buckle groove 16221, so that the knob 163 and the base 162 press the sealing gasket 164.

[0067] In a preferred embodiment of the present application, in order to avoid reverse or incorrect installation of the sealing gasket 164, an installation mark can be set on the sealing gasket 164, or the positioning boss 1632 can be set to an asymmetric state.

[0068] See also Figure 2 and Figure 3 The flow rate of the liquid medicine flowing through the flow limiting tube 167 can be controlled by adjusting the length and inner diameter of the flow limiting tube 167 or the wall thickness of the elastic liquid storage capsule 165.

[0069] See also Figures 2 to 7 A key seat 1627 is provided at the edge of the lower base plate 1623 , and a key hole 1628 is provided in the key seat 1627 ;

[0070] A gap is left between the outer wall of the sink 1625 and the key seat 1627, and the outer wall of the knob 163 is located in the gap;

[0071] An elastic anti-rotation buckle 1629 is provided on the outer wall of the sink 1625 , and the movable end of the elastic anti-rotation buckle 1629 extends into the keyhole 1628 ;

[0072] The outer wall of the knob 163 is provided with a plurality of scale lines, and the top of the outer wall is provided with a plurality of anti-rotation grooves, each of which is located at the top of a scale line, and the elastic anti-rotation buckle 1629 is located in one of the anti-rotation grooves;

[0073] The key hole 1628 is provided with a key 168 . When the key 168 is inserted into the key hole 1628 and the elastic anti-rotation buckle 1629 is lifted, the knob 163 can be rotated.

[0074] In a preferred embodiment of the present application, flow rate indication text is provided at the bottom of the scale line to facilitate flow rate adjustment. The top end surface of the outer wall of the knob 163 is provided with multiple positioning grooves, and a positioning bump 16231 is provided on the ring where the gap is located. When the flow rate regulator is at different flow rates, the positioning bump 16231 is correspondingly located in one of the positioning grooves.

[0075] See also Figure 8 what Figure 9The key 168 includes a main body 1681 and a pressing panel 1682 connected to each other, and the main body 1681 is provided with a control inclined surface 1683 for lifting the elastic anti-rotation buckle.

[0076] Preferably, the inclination angle of the control slope 1683 is 20°~70°.

[0077] See also Figure 5 、 Figure 7 and Figure 10 In a preferred embodiment of the present application, the base 162 includes a second liquid hole A1, a second liquid hole A2, and a second liquid hole A3. The liquid flow rates of the second liquid hole A1, the second liquid hole A2, and the second liquid hole A3 are 2 mL / h, 4 mL / h, and 8 mL / h, respectively (similarly, other three values ​​can also be set). The sealing gasket 164 includes a channel B1, a channel B2, a channel B3, a channel B4, a channel B5, a channel B6, a channel B7, a channel B8, and a channel B9.

[0078] It can be understood that in other embodiments, the number of the second liquid holes and the number of the channels can be set according to actual needs.

[0079] The top end surface of the outer wall of the knob 163 is provided with a positioning groove 1 C1, a positioning groove 2 C2, a positioning groove 3 C3, a positioning groove 4 C4, a positioning groove 5 C5, a positioning groove 6 C6, a positioning groove 7 C7 and a positioning groove 8 C8.

[0080] The top of the outer wall of the knob 163 is provided with a stop groove 1 D1, a stop groove 2 D2, a stop groove 3 D3, a stop groove 4 D4, a stop groove 5 D5, a stop groove 6 D6, a stop groove 7 D7 and a stop groove 8 D8.

[0081] It should be noted that the flow rate adjustment method in this application is as follows:

[0082] 0 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical personnel from adjusting the flow rate), and press the pressing panel 1682 outside the keyhole 1628 to control the inclined surface 1683 to push up the elastic anti-rotation buckle 1629 ( Figure 9 The elastic anti-rotation buckle 1629 is no longer stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 0mL / h, and remove the key 168. At this time, the positioning bump 16231 is stuck in the positioning groove 2 C2 (increasing the positioning feel when rotating the scale). The elastic anti-rotation buckle 1629 rebounds and is stuck in the anti-rotation groove 2 D2 (preventing accidental rotation of the knob). The second liquid hole 1 A1 to the second liquid hole 3 A3 are all misaligned with the channel 1 B1 to the channel 9 B9 ( Figure 10), the second liquid passage hole A1 to the second liquid passage hole A3 are blocked by the sealing gasket 164, and the flow of the liquid medicine stops.

[0083] 2mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical personnel from adjusting the flow rate), and press the pressing panel 1682 outside the keyhole 1628 to control the inclined surface 1683 to push up the elastic anti-rotation buckle 1629 ( Figure 9 The elastic anti-rotation buckle 1629 is no longer stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 2mL / h, and remove the key 168. At this time, the positioning bump 16231 is stuck in the positioning groove three C3 (increasing the positioning feel when rotating the scale). The elastic anti-rotation buckle 1629 rebounds and is stuck in the anti-rotation groove three D3 (preventing accidental rotation of the knob). The second liquid hole A1 is connected to the fourth channel B4. The second liquid hole A2 and the second liquid hole A3 are misaligned with the channels B1 to B9 and are blocked by the sealing gasket 164 ( Figure 10 ), since the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid passage hole A1 is 2 mL / h, the infusion flow rate is 2 mL / h.

[0084] 4mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical personnel from adjusting the flow rate), and press the pressing panel 1682 outside the keyhole 1628 to control the inclined surface 1683 to push up the elastic anti-rotation buckle 1629 ( Figure 9 The elastic anti-rotation buckle 1629 is no longer stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 4mL / h, and remove the key 168. At this time, the positioning bump 16231 is stuck in the positioning groove four C4 (increasing the positioning feel when rotating the scale). The elastic anti-rotation buckle 1629 rebounds and is stuck in the anti-rotation groove four D4 (preventing accidental rotation of the knob). The second liquid hole A2 is connected to the fourth channel B4. The second liquid hole A1 and the second liquid hole A3 are misaligned with the channels B1 to B9 and are blocked by the sealing gasket 164 ( Figure 10 ), since the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid passage hole A2 is 4 mL / h, the infusion flow rate is 4 mL / h.

[0085] 6mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical personnel from adjusting the flow rate), and press the pressing panel 1682 outside the keyhole 1628 to control the inclined surface 1683 to push up the elastic anti-rotation buckle 1629 ( Figure 9The elastic anti-rotation buckle 1629 is no longer stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 6mL / h, and remove the key 168. At this time, the positioning bump 16231 is stuck in the positioning groove five C5 (increasing the positioning feel when rotating the scale). The elastic anti-rotation buckle 1629 rebounds and is stuck in the anti-rotation groove five D5 (preventing accidental rotation of the knob). The second liquid hole A1 is connected to the channel six B6, the second liquid hole A2 is connected to the channel five B5, and the second liquid hole A3 is misaligned with the channels one B1 to nine B9 and blocked by the sealing gasket 164 ( Figure 10 ), since the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid hole A1 is 2 mL / h, and the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid hole A2 is 4 mL / h, the infusion flow rate is 2 mL / h+4 mL / h, which is 6 mL / h.

[0086] 8mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical personnel from adjusting the flow rate), and press the pressing panel 1682 outside the keyhole 1628 to control the inclined surface 1683 to push up the elastic anti-rotation buckle 1629 ( Figure 9 The elastic anti-rotation buckle 1629 is no longer stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 8mL / h, and remove the key 168. At this time, the positioning bump 16231 is stuck in the positioning groove six C6 (increasing the positioning feel when rotating the scale). The elastic anti-rotation buckle 1629 rebounds and is stuck in the anti-rotation groove six D6 (preventing accidental rotation of the knob). The second liquid hole three A3 is connected to the channel six B6. The second liquid hole one A1 and the second liquid hole two A2 are misaligned with the channels one B1 to nine B9 and are blocked by the sealing gasket 164 ( Figure 10 ), since the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid passage hole A3 is 8 mL / h, the infusion flow rate is 8 mL / h.

[0087] 10mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical personnel from adjusting the flow rate), and press the pressing panel 1682 outside the keyhole 1628 to control the inclined surface 1683 to push up the elastic anti-rotation buckle 1629 ( Figure 9 The elastic anti-rotation buckle 1629 is no longer stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 10mL / h, and remove the key 168. At this time, the positioning bump 16231 is stuck in the positioning groove seven C7 (increasing the positioning feel when rotating the scale). The elastic anti-rotation buckle 1629 rebounds and is stuck in the anti-rotation groove seven D7 (preventing accidental rotation of the knob). The second liquid hole A1 is connected to the channel eight B8, the second liquid hole three A3 is connected to the channel seven B7, and the second liquid hole two A2 is misaligned with the channels one B1 to nine B9 and is blocked by the sealing gasket 164 ( Figure 10), since the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid hole A1 is 2 mL / h, and the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid hole A3 is 8 mL / h, the infusion flow rate is 2 mL / h + 8 mL / h, which is 10 mL / h.

[0088] 12mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical personnel from adjusting the flow rate), and press the pressing panel 1682 outside the keyhole 1628 to control the inclined surface 1683 to push up the elastic anti-rotation buckle 1629 ( Figure 9 The elastic anti-rotation buckle 1629 is no longer stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 12mL / h, and remove the key 168. At this time, the positioning bump 16231 is stuck in the positioning groove eight C8 (increasing the positioning feel when rotating the scale). The elastic anti-rotation buckle 1629 rebounds and is stuck in the anti-rotation groove eight D8 (preventing accidental rotation of the knob). The second liquid hole two A2 is connected to the channel nine B9, the second liquid hole three A3 is connected to the channel eight B8, and the second liquid hole one A1 is misaligned with the channels one B1 to nine B9 and is blocked by the sealing gasket 164 ( Figure 10 ), since the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid hole A2 is 4 mL / h, and the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid hole A3 is 8 mL / h, the infusion flow rate is 4 mL / h+8 mL / h, which is 12 mL / h.

[0089] 14 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical personnel from adjusting the flow rate), and press the pressing panel 1682 outside the keyhole 1628 to control the inclined surface 1683 to push up the elastic anti-rotation buckle 1629 ( Figure 9 The elastic anti-rotation buckle 1629 is no longer stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 14mL / h. Take out the key 168. At this time, the positioning bump 16231 is stuck in the positioning groove C1 (increasing the positioning feel when rotating the scale). The elastic anti-rotation buckle 1629 rebounds and is stuck in the anti-rotation groove D1 (preventing accidental rotation of the knob). The second liquid hole A1 is connected to the channel B3, the second liquid hole A2 is connected to the channel B2, and the second liquid hole A3 is connected to the channel B1. Figure 10 ), since the flow rate controlled by the flow limiting tube 167 of the second liquid hole A1 is 2 mL / h, the flow rate controlled by the flow limiting tube 167 of the second liquid hole A2 is 4 mL / h, and the flow rate controlled by the flow limiting tube 167 of the second liquid hole A3 is 8 mL / h, the flow rate of the infusion liquid is 2 mL / h + 4 mL / h + 8 mL / h, which is 14 mL / h.

[0090] It is understood that the above flow rate adjustment method realizes the switching of different flow rates of 0mL / h, 2mL / h, 4mL / h, 8mL / h after arranging and combining the channels between 0mL / h, 2mL / h, 4mL / h, 6mL / h, 8mL / h, 10mL / h, 12mL / h, and 14mL / h. Similarly, when the flow rates of the three flow limiting tubes 167 are other values, they can also be arranged to switch to other different flow rates. For example, when the flow rates of the three flow limiting tubes 167 are 1mL / h, 2mL / h, and 4mL / h, respectively, the switching of flow rates of 0mL / h, 1mL / h, 2mL / h, 3mL / h, 4mL / h, 5mL / h, 6mL / h, and 7mL / h can be realized.

[0091] In summary, the present invention integrates the adjustment function into the protective bottle 10, which not only solves the single flow rate function limitation of the traditional infusion pump, but also solves the shortcomings of the flow adjustment device of the multi-flow rate infusion pump in the prior art, which is bulky, located in the middle of the pipeline, and has redundant pipeline layout. At the same time, it avoids the disadvantage that the flow adjustment device of the multi-flow rate infusion pump in the prior art is prone to collision or pulling during movement, affecting the safety and comfort of infusion.

[0092] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An infusion pump with adjustable flow rate, comprising a protective bottle, a liquid filter, an automatic control component, a three-way connector, a liquid outlet connector and a protective cap, and a flow rate regulator, which are sequentially connected by a hose, characterized in that: The flow rate regulator comprises an upper seat and a base connected to each other, a knob is rotatably connected to the bottom of the base, and a sealing gasket is embedded between the knob and the base; The upper seat is provided with a slide rod sleeve which is slidably connected to the elastic liquid storage bag, and the bottom of the slide rod sleeve is provided with a dosing hole and a plurality of first liquid holes; The base is provided with a first through hole and a plurality of second liquid holes abutting against each other, each of the plurality of second liquid holes having a different liquid flow rate. The first through hole corresponds to the position of the dosing hole, and each second liquid hole is connected to a corresponding first liquid hole via a flow limiting tube. The other end of the first through hole extends to form a snap post; A second through hole is provided in the knob, a positioning boss is provided at one end edge of the second through hole, the sealing gasket is sleeved on the positioning boss, and an elastic sheet is provided at the other end edge to be buckled and connected with the buckle column; An annular groove is provided on the contact surface between the knob and the sealing gasket, and a liquid outlet hole is provided in the annular groove; The sealing gasket is provided with a plurality of channels connected to the annular groove. By turning the knob, different channels are connected to different second liquid holes, thereby realizing multi-flow rate adjustment with discrete gear combinations. The bottom of the protective bottle is connected to the upper seat, the dosing hole is connected to the dosing connector through the first through hole, and the liquid outlet is connected to the liquid filter; A sliding rod is slidably provided in the sliding rod sleeve, one end of the elastic liquid storage bag is fixed to the bottom of the sliding rod sleeve, and the other end is fixed to the top of the sliding rod.

2. The infusion pump with adjustable flow rate according to claim 1, characterized in that The upper seat includes an upper base plate and an upper ring outer wall connected to the base, the sliding rod sleeve is located on one surface of the upper base plate, and an upper boss is provided on the other surface of the upper base plate, and the dosing hole and the first liquid hole are located in the upper boss.

3. The infusion pump with adjustable flow rate according to claim 1, characterized in that The flow limiting tube is made of soft material and has an inner diameter of 0.05 mm to 0.2 mm.

4. The infusion pump with adjustable flow rate according to claim 2, characterized in that: The base comprises a lower bottom plate and a lower ring outer wall connected to the upper ring outer wall, a sink groove is provided on one surface of the lower bottom plate, and the buckle column is provided on the other surface; A plurality of liquid-passing columns abutting against each other are provided on the edge of the sink, and each second liquid-passing hole is located in one of the liquid-passing columns.

5. The infusion pump with adjustable flow rate according to claim 4, characterized in that: An annular buckle groove is provided in the buckle column, and the elastic sheet is clamped in the annular buckle groove.

6. The infusion pump with adjustable flow rate according to claim 4, characterized in that: A key seat is provided at the edge of the lower base plate, and a key hole is provided in the key seat; A gap is left between the outer wall of the sink and the key seat, and the outer wall of the knob is located in the gap; An elastic anti-rotation buckle is provided on the outer wall of the sink, and the movable end of the elastic anti-rotation buckle extends into the keyhole; The outer wall of the knob is provided with a plurality of scale lines, and the top of the outer wall is provided with a plurality of anti-rotation grooves, each of the anti-rotation grooves is located at the top of a scale line, and the elastic anti-rotation buckle is located in one of the anti-rotation grooves; A key is provided in the keyhole. When the key is inserted into the keyhole and the elastic anti-rotation buckle is lifted, the knob can be rotated.

7. The infusion pump with adjustable flow rate according to claim 6, characterized in that: The key comprises a main body and a pressing panel connected to each other, and the main body is provided with a control inclined surface for lifting the elastic anti-rotation buckle.

8. The infusion pump with adjustable flow rate according to claim 7, characterized in that: The inclination angle of the control slope is 20°~70°.

9. The infusion pump with adjustable flow rate according to claim 1, characterized in that: The elastic liquid storage bag is made of elastic silicone material. In an unpressurized state, it is wrapped around the slide rod and the slide rod cover in a straight cylindrical shape. After adding medicine, it will expand into an elliptical spherical shape.

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