Infusion pump capable of adjusting flow velocity and flow velocity adjuster thereof

Abstract

The invention relates to an infusion pump capable of adjusting flow velocity and a flow velocity adjuster thereof, the flow velocity adjuster comprises an upper seat, a base, a knob and a sealing gasket; a sliding rod sleeve in sliding connection with the elastic liquid storage bag is arranged in the upper seat, and a medicine adding hole and a plurality of first liquid passing holes are formed in the bottom of the sliding rod sleeve; a first through hole and a plurality of second liquid passing holes abutting against the first through hole are formed in the base. A second through hole is formed in the knob, a positioning boss is arranged at the edge of one end of the second through hole, and an elastic sheet is arranged at the edge of the other end; an annular groove is formed in the knob, and a liquid outlet hole is formed in the annular groove; a plurality of channels communicating with the annular groove are formed in the sealing gasket in a surrounding mode, and by rotating the rotary knob, the different channels correspondingly communicate with the different second liquid passing holes. According to the multi-flow-speed infusion pump, the adjusting function is integrated in the protection bottle, the problem that a traditional infusion pump is limited by the single flow speed function is solved, and the defects that a flow adjusting device of a multi-flow-speed infusion pump in the prior art is large in size, located in the middle of a pipeline and redundant in pipeline layout are overcome.

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 its flow rate regulator. Background Art

[0002] A single-flow-rate infusion pump can only achieve a fixed flow rate output through a manual mechanical device (such as a flow controller), and it is difficult to meet the precise requirements for multi-dose and multi-stage infusion in complex treatment scenarios. For example, in analgesia or the infusion of antibiotics and oncology drugs, patients may need to dynamically adjust the infusion rate according to their condition. However, a single-flow-rate infusion pump relies on frequent intervention by medical staff, which is prone to drug concentration fluctuations due to operation 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 at different flow rates. A single-flow-rate infusion pump is difficult to meet different needs, which leads to the need to purchase different models and types of products, and it is easy to be confused during use, and it also adds a lot of workload to the hospital procurement and inventory departments. Therefore, the emergence of multi-flow-rate infusion pumps has been well received by the market.

[0003] In the prior art, the publication number CN211798030U discloses a new type of limit multi-flow-rate controller for preventing accidental speed adjustment. Although the flow rate switching is achieved through a mechanical multi-gear adjustment device, its multi-flow-rate adjustment module adopts a complex mechanical valve combination, and a large regulator (such as a knob-type gear structure) needs to be set in the middle of the infusion pipeline, resulting in a bloated overall volume of the device and redundant pipeline layout. At the same time, the gear switching accuracy of such a mechanical multi-gear adjustment device is limited, and the flow rate deviation is easily caused due to wear after long-term use. The adjustable flow rate infusion pump and its flow rate regulator disclosed in the publication number CN110898286A can achieve different flow rate adjustments. However, the four diversion tubes in the valve core are distributed in a layered and staggered manner, which makes the valve core have to be thick enough. At the same time, the holes are multi-directional and slender, resulting in difficulty in injection molding and difficult core pulling during the injection molding process. In addition, in the above-mentioned prior art, the flow rate adjustment structures of multi-flow-rate infusion pumps are all located in the middle of the pipeline, increasing the burden on patients when carrying, and are prone to collision or pulling during movement, affecting the infusion safety. At the same time, it limits the patient's freedom of movement and reduces the treatment comfort. 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 its flow rate regulator. On the premise of ensuring infusion accuracy and safety, through an integrated and miniaturized flow rate adjustment structure design, the volume is reduced and it is convenient to carry, providing a more flexible and comfortable treatment experience for patients.

[0005] In a first aspect, the present invention provides a flow rate regulator, which includes an upper seat and a base connected to each other. A knob is rotatably connected to the bottom of the base, and a gasket is embedded between the knob and the base. A slide rod sleeve slidably connected to an elastic liquid storage bladder is provided in the upper seat. A medicine adding hole and a plurality of first liquid passing holes are provided at the bottom of the slide rod sleeve. A first through hole and a plurality of second liquid passing holes that abut against each other are provided in the base. The position of the first through hole corresponds to that of the medicine adding hole. Each second liquid passing hole is connected to one of the first liquid passing holes through a flow limiting tube, and 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, and the gasket is sleeved on the positioning boss. An elastic piece for snap connection with the snap post is provided at the other end edge. An annular groove is provided on the contact surface between the knob and the gasket, and a liquid outlet hole is provided in the annular groove. A plurality of channels communicating with the annular groove are provided around the gasket. By rotating the knob, different channels are made to communicate with different second liquid passing holes.

[0006] Preferably, the upper seat includes an upper bottom plate and an upper ring outer wall connected to the base. The slide rod sleeve is located on one surface of the upper bottom plate, and an upper boss is provided on the other surface of the upper bottom plate. The medicine adding hole and the first liquid passing holes are located in the upper boss.

[0007] Preferably, the flow limiting tube is made of a soft material and has an inner diameter of 0.05 mm to 0.2 mm.

[0008] Preferably, the base includes a lower bottom plate and a lower ring outer wall connected to the upper ring outer wall. A sink is provided on one surface of the lower bottom plate, and the snap post is provided on the other surface. A plurality of liquid passing posts that abut against each other are provided at the edge of the sink, and each second liquid passing hole is located in one of the liquid passing posts.

[0009] Preferably, an annular snap groove is provided in the snap post, and the elastic piece is stuck in the annular snap groove.

[0010] Preferably, a key seat is provided at the edge of the lower bottom plate, and a key hole is provided in the key seat. A gap is left between the outer groove 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 groove wall of the sink, and the movable end of the elastic anti-rotation buckle extends into the key hole. 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 correspondingly 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 pushed up, the knob can rotate.

[0011] Preferably, the key includes a connected body and a pressing panel, and the body is provided with a control inclined surface for pushing up the elastic anti-rotation buckle.

[0012] Preferably, the inclination angle of the control inclined surface is 20°-70°.

[0013] In a second aspect, the present invention provides an infusion pump with adjustable flow rate, including a bottle protector, a liquid medicine filter, a self-control component, a three-way joint, a liquid outlet joint and a protective cap sequentially connected by a hose, and the above-mentioned flow rate regulator; The bottom of the bottle protector is connected to the upper seat, the medicine adding hole is connected to the medicine adding joint, and the liquid outlet hole is connected to the liquid medicine filter; A slide rod is slidably arranged in the slide rod sleeve. One end of the elastic liquid storage bag is fixed to the bottom of the slide rod sleeve, and the other end is fixed to the top of the slide rod.

[0014] Preferably, the elastic liquid storage bag is made of elastic silica gel material. In an uncompressed state, it is in a straight cylindrical shape and wraps around the slide rod and the slide rod sleeve. After adding medicine, it will expand into an elliptical spherical shape.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By integrating the adjustment function in the bottle protector, it not only solves the limitation of the single flow rate function of the traditional infusion pump, but also solves the disadvantages of the flow rate adjustment device of the multi-flow rate infusion pump in the prior art, such as being bulky, located in the middle of the pipeline, and having redundant pipeline layout. At the same time, it avoids the disadvantages that the flow rate adjustment device of the multi-flow rate infusion pump in the prior art is prone to collision or pulling during the movement process, affecting the infusion safety and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the infusion pump with adjustable flow rate in the present invention; Figure 2 is Figure 1 a cross-sectional view of the flow rate regulator in Figure 3 is Figure 1 an exploded view of the flow rate regulator in Figure 4 is Figure 3 a schematic structural diagram of the upper seat in Figure 5 isFigure 3 Structural schematic diagram of the middle base; Figure 6 is Figure 3 Structural schematic diagram of the middle knob; Figure 7 is Figure 3 Structural schematic diagram of the middle gasket; Figure 8 is Figure 3 Structural schematic diagram of the key; Figure 9 Schematic diagram of the action when the elastic anti-rotation buckle is lifted after the key is inserted into the keyhole; Figure 10 Schematic diagram of the connection situation between the second liquid passing holes A1 to A3 and the channels B1 to B9 under different flow velocity states.

[0017] Description of main component symbols: 10 - Bottle protector; 11 - Liquid medicine filter; 12 - Automatic control component; 13 - Three-way joint; 14 - Liquid outlet joint; 15 - Protective cap; 16 - Flow rate regulator; 17 - Medicine adding joint; 161 - Upper seat; 1611 - Upper bottom plate; 1612 - Outer wall of the upper ring; 1613 - Upper boss; 162 - Base; 1621 - First through hole; 1622 - Buckle post; 16221 - Annular buckle groove; 1623 - Lower bottom plate; 16231 - Positioning convex bump; 1624 - Outer wall of the lower ring; 1625 - Sunk groove; 1626 - Liquid passing post; 1627 - Key seat; 1628 - Keyhole; 1629 - Elastic anti-rotation buckle; 163 - Knob; 1631 - Second through hole; 1632 - Positioning convex platform; 1633 - Elastic sheet; 1634 - Annular groove; 1635 - Liquid outlet hole; 164 - Gasket; 165 - Elastic liquid storage bladder; 166 - Slide rod sleeve; 1661 - Medicine adding hole; 1662 - First liquid passing hole; 1663 - Slide rod; 167 - Flow limiting tube; 168 - Key; 1681 - Body; 1682 - Pressing panel; 1683 - Control inclined plane; The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. Specific embodiments

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0019] Please refer to Figure 1, an infusion pump with adjustable flow rate provided in an embodiment of the present invention includes a bottle protector 10, a liquid medicine filter 11, a self-control component 12, a three-way joint 13, a liquid outlet joint 14, a protective cap 15, and a flow rate regulator 16 that are sequentially connected by a hose.

[0020] Specifically, a fixed volume of liquid medicine is stored inside the self-control component 12. When needed, by pressing the switch on the self-control component 12, this part of the fixed volume of liquid medicine can be input into the human body. After being input into the human body and waiting for a period of time, the self-control component 12 will automatically store the fixed volume of liquid medicine again.

[0021] Please refer to Figures 2 to 7 , the flow rate regulator 16 includes an upper seat 161 and a base 162 that are connected. A knob 163 is rotatably connected to the bottom of the base 162, and a sealing gasket 164 is embedded between the knob 163 and the base 162; A slide rod sleeve 166 that is slidably connected to an elastic liquid storage bladder 165 is provided in the upper seat 161. A medicine adding hole 1661 and a plurality of first liquid passing holes 1662 are provided at the bottom of the slide rod sleeve 166; A first through hole 1621 and a plurality of second liquid passing holes that are abutted are provided in the base 162. The position of the first through hole 1621 corresponds to that of the medicine adding hole 1661. Each second liquid passing hole is connected to one of the first liquid passing holes 1662 through a flow limiting tube 167, and the other end of the first through hole 1621 extends to form a snap post 1622; A second through hole 1631 is provided in the knob 163. A positioning boss 1632 is provided at one end edge of the second through hole 1631, and the sealing gasket 164 is sleeved on the positioning boss 1632. An elastic piece 1633 that is snap-fitted with the snap post 1622 is provided at the other end edge; 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; A plurality of channels that communicate with the annular groove 1634 are provided around the sealing gasket 164. By rotating the knob 163, different channels are made to communicate with different second liquid passing holes.

[0022] Specifically, the sealing gasket 164 is made of an elastic material, and medical fluorosilicone oil for lubrication and maintenance is smeared on the outer surface. The sealing gasket 164 is press-fitted and clamped between the base 162 and the knob 163 to form a seal therebetween.

[0023] Furthermore, an inner ring sealing rib and an outer ring sealing rib are respectively provided on the two end faces 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.

[0024] Please refer to Figure 2 and Figure 3 , the bottom of the bottle protector 10 is connected to the upper seat 161, the medicine adding hole 1661 is connected to the medicine adding connector 17 through the first through hole 1621, and the liquid outlet hole 1635 is connected to the liquid medicine filter through a hose; A slide rod 1663 is slidably arranged in the slide rod sleeve 166. One end of the elastic liquid storage bag 165 is fixed to the bottom of the slide rod sleeve 166, and the other end is fixed to the top of the slide rod 1663.

[0025] In a preferred embodiment of the present application, the elastic liquid storage bag 165 is made of elastic silica gel material. Both ends of the elastic liquid storage bag 165 are tightly sleeved on the slide rod 1663 and the slide rod sleeve 166 through sleeved elastic silica gel rings, so that both ends of the elastic liquid storage bag 165 are hermetically closed. In the uncompressed state, it is wrapped around the slide rod 1663 and the slide rod sleeve 166 in a straight tube shape, and after adding medicine, it will expand into an elliptical spherical shape.

[0026] It should be noted that in the present application, the medicine adding connector 17 is a needleless connector, which has the characteristics of being connected and separated from the syringe and self-sealing. When in use, the syringe filled with liquid medicine is connected to the medicine adding connector 17. After pushing the syringe, the liquid medicine flows through the medicine adding connector 17, the pipeline, the medicine adding hole 1661, and the slide rod sleeve 166, and finally reaches the elastic liquid storage bag 165, expanding and stretching the elastic liquid storage bag 165. The top end slides upward along with the slide rod 1663, and the liquid medicine is stored in the elastic liquid storage bag 165. After adding medicine, the syringe and the medicine adding connector 17 are separated, and the medicine adding connector 17 automatically closes the channel. At the same time, the liquid medicine in the elastic liquid storage bag 165 is pressed by the elastic wrapping force of the elastic liquid storage bag 165, and flows through the first liquid passing hole 1662, the flow limiting tube 167, the second liquid passing hole, the channel, the annular groove 1634, the liquid outlet hole 1635, the pipeline, the liquid medicine filter 11, the self-control component 12, the three-way joint 13, and the liquid outlet joint 14, and finally is input into the human body through the human catheter connected to the liquid outlet joint 14.

[0027] Please refer to Figures 2 to 4 , the upper seat 161 includes an upper bottom 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 bottom plate 1611. An upper convex platform 1613 is provided on the other surface of the upper bottom plate 1611. The medicine adding hole 1661 and the first liquid passing hole 1662 are located in the upper convex platform 1613.

[0028] Please refer to Figures 2 to 5, the base 162 includes a lower bottom plate 1623 and a lower ring outer wall 1624 connected to the outer wall 1612 of the upper ring. A sunken groove 1625 is provided on one surface of the lower bottom plate 1623, and the snap post 1622 is provided on the other surface; A plurality of liquid passing posts 1626 that abut against each other are provided at the edge of the sunken groove 1625, and each second liquid passing hole is located in one of the liquid passing posts 1626.

[0029] It should be noted that the inner wall of the outer wall 1612 of the upper ring is respectively fastened and connected to the outer wall of the outer wall 1624 of the lower ring and the bottom outer wall of the bottle protector 10, and is simultaneously reinforced by glue bonding to achieve a sealing effect.

[0030] In a preferred embodiment of the present application, an annular snap groove 16221 is provided in the snap post 1622, and the elastic piece 1633 is stuck in the annular snap groove 16221.

[0031] During installation, first install the sealing gasket 164 in the knob 163, then spread the end of the elastic piece 1633 by the snap post 1622, and then the end of the elastic piece 1633 is stuck in the annular snap groove 16221, so that the knob 163 and the base 162 press the sealing gasket 164.

[0032] In a preferred embodiment of the present application, in order to prevent the 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 in an asymmetric state.

[0033] Please refer to Figure 2 and Figure 3 , the flow-limiting tube 167 is made of a soft material and has an inner diameter of 0.05 mm to 0.2 mm. 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 bladder 165.

[0034] Please refer to Figures 2 to 7 , a key seat 1627 is provided at the edge of the lower bottom plate 1623, and a key hole 1628 is provided in the key seat 1627; A gap is left between the outer groove wall of the sunken groove 1625 and the key seat 1627, and the outer wall of the knob 163 is located in the gap; An elastic anti-rotation buckle 1629 is provided on the outer groove wall of the sunken groove 1625, and the movable end of the elastic anti-rotation buckle 1629 extends into the key hole 1628; A plurality of scale lines are provided on the outer wall of the knob 163, and a plurality of anti-rotation grooves are provided at the top end of the outer wall. Each of the anti-rotation grooves is correspondingly located at the top of a scale line, and the elastic anti-rotation buckle 1629 is located in one of the anti-rotation grooves; A key 168 is provided in the keyhole 1628. When the key 168 is inserted into the keyhole 1628 and the elastic anti-rotation buckle 1629 is lifted, the knob 163 can be rotated.

[0035] In a preferred embodiment of the present application, flow rate indication words are provided at the bottom of the scale lines to facilitate flow rate adjustment. A plurality of positioning grooves are provided on the end face at the top end of the outer wall of the knob 163, and a positioning convex hull 16231 is provided on the ring where the gap is located. When the flow rate regulator is at different flow rates, the positioning convex hull 16231 is correspondingly located in one of the positioning grooves.

[0036] Please refer to Figure 8 What Figure 9 As shown in, the key 168 includes a connected body 1681 and a pressing panel 1682, and a control inclined surface 1683 for lifting the elastic anti-rotation buckle is provided on the body 1681.

[0037] Preferably, the inclination angle of the control inclined surface 1683 is 20° - 70°.

[0038] Please refer to Figure 5 、 Figure 7 And Figure 10 As shown in, in a preferred embodiment of the present application, the base 162 contains a second liquid passing hole one A1, a second liquid passing hole two A2, and a second liquid passing hole three A3. The liquid flow rates of the second liquid passing hole one A1, the second liquid passing hole two A2, and the second liquid passing hole three 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 contains a channel one B1, a channel two B2, a channel three B3, a channel four B4, a channel five B5, a channel six B6, a channel seven B7, a channel eight B8, and a channel nine B9.

[0039] It can be understood that in other embodiments, the number of the second liquid passing holes and the number of the channels can both be set according to actual needs.

[0040] The end face at the top end of the outer wall of the knob 163 is provided with a positioning groove one C1, a positioning groove two C2, a positioning groove three C3, a positioning groove four C4, a positioning groove five C5, a positioning groove six C6, a positioning groove seven C7, and a positioning groove eight C8.

[0041] The outer wall top of the knob 163 is provided with an anti-rotation groove one D1, an anti-rotation groove two D2, an anti-rotation groove three D3, an anti-rotation groove four D4, an anti-rotation groove five D5, an anti-rotation groove six D6, an anti-rotation groove seven D7 and an anti-rotation groove eight D8.

[0042] It should be noted that the method for adjusting the flow rate in this application is as follows: 0 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical staff from adjusting the flow rate), and press the pressing panel 1682 located outside the keyhole 1628, control the inclined plane 1683 to lift the elastic anti-rotation buckle 1629 ( Figure 9 ). The elastic anti-rotation buckle 1629 no longer gets stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 0 mL / h, take out the key 168. At this time, the positioning convex hull 16231 snaps into the positioning groove two C2 (to increase the positioning feel when rotating the scale), the elastic anti-rotation buckle 1629 rebounds and snaps into the anti-rotation groove two D2 (to prevent the knob from rotating accidentally), and the second liquid passing holes one A1 to the second liquid passing holes three A3 are all misaligned with the channels one B1 to the channels nine B9 ( Figure 10 ). The second liquid passing holes one A1 to the second liquid passing holes three A3 are blocked by the sealing gasket 164, and the liquid medicine flow stops.

[0043] 2 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical staff from adjusting the flow rate), and press the pressing panel 1682 located outside the keyhole 1628, control the inclined plane 1683 to lift the elastic anti-rotation buckle 1629 ( Figure 9 ). The elastic anti-rotation buckle 1629 no longer gets stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 2 mL / h, take out the key 168. At this time, the positioning convex hull 16231 snaps into the positioning groove three C3 (to increase the positioning feel when rotating the scale), the elastic anti-rotation buckle 1629 rebounds and snaps into the anti-rotation groove three D3 (to prevent the knob from rotating accidentally), the second liquid passing hole one A1 communicates with the channel four B4, and the second liquid passing holes two A2 and the second liquid passing holes three A3 are misaligned with the channels one B1 to the channels nine B9 and are blocked by the sealing gasket 164 ( Figure 10 ). Since the flow rate controlled by the second liquid passing hole one A1 corresponding to the flow limiting tube 167 is 2 mL / h, the infusion liquid medicine flow rate is 2 mL / h.

[0044] 4 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical staff from adjusting the flow rate), and press the pressing panel 1682 located outside the keyhole 1628, control the inclined plane 1683 to lift the elastic anti-rotation buckle 1629 ( Figure 9). The elastic anti-rotation buckle 1629 no longer gets stuck in the anti-rotation groove. Rotate the knob 163 to make the pointer point to the scale line 4 mL / h, take out the key 168. At this time, the positioning convex bump 16231 snaps into the positioning groove C4 (to increase the positioning feel when rotating the scale), the elastic anti-rotation buckle 1629 rebounds and snaps into the anti-rotation groove D4 (to prevent the knob from rotating accidentally), the second liquid passing hole A2 communicates with the channel B4, and the first liquid passing hole A1 and the third liquid passing hole A3 of the second are misaligned with the channels B1 - B9 and are blocked by the gasket 164 ( Figure 10 ). Since the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid passing hole A2 is 4 mL / h, the infusion liquid flow rate is 4 mL / h.

[0045] 6 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical staff from adjusting the flow rate), and press the pressing panel 1682 located outside the keyhole 1628, and control the inclined plane 1683 to lift the elastic anti-rotation buckle 1629 ( Figure 9 ). The elastic anti-rotation buckle 1629 no longer gets stuck in the anti-rotation groove. Rotate the knob 163 to make the pointer point to the scale line 6 mL / h, take out the key 168. At this time, the positioning convex bump 16231 snaps into the positioning groove C5 (to increase the positioning feel when rotating the scale), the elastic anti-rotation buckle 1629 rebounds and snaps into the anti-rotation groove D5 (to prevent the knob from rotating accidentally), the first liquid passing hole A1 of the second communicates with the channel B6, the second liquid passing hole A2 of the second communicates with the channel B5, and the third liquid passing hole A3 of the second is misaligned with the channels B1 - B9 and is blocked by the gasket 164 ( Figure 10 ). Since the flow rate controlled by the flow limiting tube 167 corresponding to the first liquid passing hole A1 of the second is 2 mL / h, and the flow rate controlled by the flow limiting tube 167 corresponding to the second liquid passing hole A2 of the second is 4 mL / h, the infusion liquid flow rate is 2 mL / h + 4 mL / h = 6 mL / h.

[0046] 8 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical staff from adjusting the flow rate), and press the pressing panel 1682 located outside the keyhole 1628, and control the inclined plane 1683 to lift the elastic anti-rotation buckle 1629 ( Figure 9 ). The elastic anti-rotation buckle 1629 no longer gets stuck in the anti-rotation groove. Rotate the knob 163 to make the pointer point to the scale line 8 mL / h, take out the key 168. At this time, the positioning convex bump 16231 snaps into the positioning groove C6 (to increase the positioning feel when rotating the scale), the elastic anti-rotation buckle 1629 rebounds and snaps into the anti-rotation groove D6 (to prevent the knob from rotating accidentally), the third liquid passing hole A3 of the second communicates with the channel B6, and the first liquid passing hole A1 and the second liquid passing hole A2 of the second are misaligned with the channels B1 - B9 and are blocked by the gasket 164 ( Figure 10 ). Since the flow rate controlled by the flow limiting tube 167 corresponding to the third liquid passing hole A3 of the second is 8 mL / h, the infusion liquid flow rate is 8 mL / h.

[0047] 10 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical staff from adjusting the flow rate), and press the pressing panel 1682 located outside the keyhole 1628 to control the inclined plane 1683 to lift the elastic anti-rotation buckle 1629 ( Figure 9 ). The elastic anti-rotation buckle 1629 no longer gets stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 10 mL / h. Take out the key 168. At this time, the positioning boss 16231 snaps into the positioning groove VII C7 (to increase the positioning feel when rotating the scale), and the elastic anti-rotation buckle 1629 rebounds and snaps into the anti-rotation groove VII D7 (to prevent the knob from rotating accidentally). The second liquid passing hole I A1 communicates with the channel VIII B8, the second liquid passing hole III A3 communicates with the channel VII B7, and the second liquid passing hole II A2 is misaligned with the channels I B1 to IX B9 and is blocked by the gasket 164 ( Figure 10 ). Since the flow rate controlled by the second liquid passing hole I A1 corresponding to the flow-limiting tube 167 is 2 mL / h, and the flow rate controlled by the second liquid passing hole III A3 corresponding to the flow-limiting tube 167 is 8 mL / h, the infusion liquid flow rate is 2 mL / h + 8 mL / h, which is 10 mL / h.

[0048] 12 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical staff from adjusting the flow rate), and press the pressing panel 1682 located outside the keyhole 1628 to control the inclined plane 1683 to lift the elastic anti-rotation buckle 1629 ( Figure 9 ). The elastic anti-rotation buckle 1629 no longer gets stuck in the anti-rotation groove. Rotate the knob 163 so that the pointer points to the scale line 12 mL / h. Take out the key 168. At this time, the positioning boss 16231 snaps into the positioning groove VIII C8 (to increase the positioning feel when rotating the scale), and the elastic anti-rotation buckle 1629 rebounds and snaps into the anti-rotation groove VIII D7 (to prevent the knob from rotating accidentally). The second liquid passing hole II A2 communicates with the channel IX B9, the second liquid passing hole III A3 communicates with the channel VIII B8, and the second liquid passing hole I A1 is misaligned with the channels I B1 to IX B9 and is blocked by the gasket 164 ( Figure 10 ). Since the flow rate controlled by the second liquid passing hole II A2 corresponding to the flow-limiting tube 167 is 4 mL / h, and the flow rate controlled by the second liquid passing hole III A3 corresponding to the flow-limiting tube 167 is 8 mL / h, the infusion liquid flow rate is 4 mL / h + 8 mL / h, which is 12 mL / h.

[0049] 14 mL / h: Insert the key 168 into the keyhole 1628 (to prevent non-medical staff from adjusting the flow rate), and press the pressing panel 1682 located outside the keyhole 1628 to control the inclined plane 1683 to lift 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 14 mL / h, and take out the key 168. At this time, the positioning convex bump 16231 snaps into the first positioning groove C1 (to increase the positioning feel when rotating the scale), and the elastic anti-rotation buckle 1629 rebounds and snaps into the first anti-rotation groove D1 (to prevent the knob from rotating accidentally). The first second liquid passing hole A1 is communicated with the third channel B3, the second second liquid passing hole A2 is communicated with the second channel B2, and the third second liquid passing hole A3 is communicated with the first channel B1 ( Figure 10 ). Since the flow rate controlled by the flow-limiting tube 167 corresponding to the first second liquid passing hole A1 is 2 mL / h, the flow rate controlled by the flow-limiting tube 167 corresponding to the second second liquid passing hole A2 is 4 mL / h, and the flow rate controlled by the flow-limiting tube 167 corresponding to the third second liquid passing hole A3 is 8 mL / h, the infusion liquid flow rate is 2 mL / h + 4 mL / h + 8 mL / h = 14 mL / h.

[0050] It can be understood that the above flow rate adjustment method realizes the switching of different flow rates of 0 mL / h, 2 mL / h, 4 mL / h, 6 mL / h, 8 mL / h, 10 mL / h, 12 mL / h, and 14 mL / h after the channel arrangement and combination between 0 mL / h, 2 mL / h, 4 mL / h, and 8 mL / h. Similarly, when the flow rates of the three flow-limiting tubes 167 are other values, other different flow rate switches can also be arranged. For example, when the flow rates of the three flow-limiting tubes 167 are 1 mL / h, 2 mL / h, and 4 mL / h respectively, the switching of flow rates of 0 mL / h, 1 mL / h, 2 mL / h, 3 mL / h, 4 mL / h, 5 mL / h, 6 mL / h, and 7 mL / h can be realized.

[0051] In summary, by integrating the adjustment function into the bottle protector 10, the present invention not only solves the limitation of the single flow rate function of the traditional infusion pump, but also solves the disadvantages of the flow rate adjustment device of the multi-flow rate infusion pump in the prior art, such as the bloated volume, being located in the middle of the pipeline, and the redundant pipeline layout. At the same time, it avoids the disadvantages that the flow rate adjustment device of the multi-flow rate infusion pump in the prior art is prone to collision or pulling during the movement process, affecting the infusion safety and comfort.

[0052] 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 by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A flow rate regulator, characterized in that: It comprises an upper seat and a base connected to each other, the bottom of the base is rotatably connected with a knob, and a sealing gasket is embedded between the knob and the base; The upper seat is provided with a slide rod sleeve slidably connected to the elastic liquid storage bag, and the bottom of the slide rod sleeve is provided with a drug adding hole and a plurality of first liquid passing holes; The base is provided with a first through hole and a plurality of second liquid holes abutting against each other, the first through hole corresponds to the position of the dosing hole, each second liquid hole is connected to a corresponding first liquid hole through a flow limiting tube, and the other end of the first through hole extends to form a buckle column; 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 surrounded by a plurality of channels connected with the annular groove, and different channels are connected with different second liquid holes by rotating the knob.

2. The flow rate regulator 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, an upper boss is provided on the other surface of the upper base plate, and the dosing hole and the first liquid passage hole are located in the upper boss.

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

4. The flow rate regulator 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; The edge of the sink is provided with a plurality of liquid-passing columns abutting against each other, and each second liquid-passing hole is located in one of the liquid-passing columns.

5. The flow rate regulator 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 flow rate regulator according to claim 4, characterized in that: A key seat is provided at the edge of the lower bottom plate, and a key hole is provided in the key seat; A gap is left between the outer groove 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 groove 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 arranged 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 flow rate regulator 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 flow rate regulator according to claim 7, characterized in that: The inclination angle of the control slope is 20°~70°.

9. 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 through a hose, characterized in that: Also includes the flow rate regulator of claim 1; The bottom of the bottle guard is connected to the upper seat, the drug adding hole is connected to the drug adding joint through the first through hole, and the liquid outlet is connected to the drug liquid filter; A sliding rod is slidably arranged 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.

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

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