Liquid delivery device

Abstract

A liquid conveying device comprises a base and a reversing knob, the base is provided with an injection connector, a connecting connector and an output connector, the injection connector, the connecting connector and the output connector are all integrally formed with the base, a body of the reversing knob is matched in the base in an embedded mode and can rotate relative to the base, a groove is formed in the peripheral wall of the body, and the body is provided with an opening. The groove is matched with the inner enclosure wall of the base to form a flowing channel; the body has a first position and a second position, and the flow channel communicates the injection joint with the connection joint in response to rotation of the body to the first position; the flow passage communicates the injection joint with the output joint in response to the body rotating to the second position. According to the liquid conveying device, mixing and conveying of the medicine in the sterile environment are well achieved, all the connectors and the base are integrally formed, and the reversing knob and the base are matched in an embedded mode, so that the structure of the whole device is more reliable, and the sealing performance is better.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a liquid delivery device. Background Art

[0002] In medical treatment, drugs for delivery into the human body include solutions and dry powders. Solution-type drugs are generally contained in a containing device, and can be directly drawn out and delivered into the human body using an injection device. For dry powder-type drugs, they need to be dissolved with physiological solution before use to ensure that the drugs are in an appropriate concentration and state before administration.

[0003] During the delivery of solution-type drugs, an operator generally inserts an injection device into the containing device, draws out the drug in the containing device, separates the injection device from the containing device, and then connects the injection device to a delivery device to deliver the drug into the human body. During the delivery of dry powder-type drugs, a liquid such as physiological solution is generally pre-filled into the injection device, the physiological solution is injected into the containing device containing solids such as dry powder using the injection device, after the solids are dissolved to form a mixed liquid, the mixed liquid is drawn out, and finally the injection device is connected to a delivery device to deliver the drug into the human body. Summary of the Invention

[0004] The present disclosure aims to provide a liquid delivery device.

[0005] The present disclosure is achieved through the following technical solutions:

[0006] A liquid delivery device, comprising:

[0007] A base provided with an injection connector, a connection connector, and an output connector, the injection connector, the connection connector, and the output connector being integrally formed with the base;

[0008] A reversing knob, the body of the reversing knob being embedded and fitted in the base and rotatable relative to the base, a groove being provided on the outer peripheral wall of the body, the groove and the inner peripheral wall of the base cooperating to form a flow channel;

[0009] The body has a first position and a second position. In response to the body rotating to the first position, the flow channel communicates the injection connector with the connection connector; in response to the body rotating to the second position, the flow channel communicates the injection connector with the output connector.

[0010] For example, the injection connector, the connection connector, and the output connector are all provided on the side wall of the base, and the injection connector, the connection connector, and the output connector are arranged offset in the axial direction of the base;

[0011] The flow channel includes a main passage section and an auxiliary passage section. The main passage section extends along the circumferential direction of the body. The main passage section is arranged corresponding to the injection joint along the axial direction of the base. The main passage section communicates with the injection joint, or in response to the rotation of the body, the main passage section communicates with the injection joint.

[0012] The auxiliary passage section at least extends along the axial direction of the body and communicates with the main passage section. In response to the body rotating to the first position, the auxiliary passage section communicates with the connection joint. In response to the body rotating to the second position, the auxiliary passage section communicates with the output joint.

[0013] For example, the reversing knob further includes a screwing part connected to the body, and the screwing part is located outside the base. In response to the rotation of the screwing part, the screwing part drives the body to rotate to the first position or the second position within the base.

[0014] For example, the radial dimension of the screwing part is larger than the radial dimension of the body. The end of the base includes an opening structure, and the body is accommodated within the base through the opening structure, and the screwing part abuts against the end of the base.

[0015] For example, the screwing part includes a screwing body and a fixing wall. The screwing body abuts against the end of the base, and the fixing wall is connected to the screwing body.

[0016] Along the axial direction of the body, an accommodation space is formed between the part of the body corresponding to the fixing wall and the fixing wall, and the end of the base is accommodated within the accommodation space.

[0017] For example, both the body and the screwing part are cylindrical structures, and the central axes of the body and the screwing part coincide with each other.

[0018] For example, the side wall of the base is provided with an injection port connecting the injection joint, a connection port connecting the connection joint, and an output port connecting the output joint, and the width dimensions of the grooves are all larger than the radial dimensions of the injection port, the connection port, and the output port.

[0019] For example, the liquid delivery device further includes a fixing member. The fixing member includes a cover plate and a connecting part connected to each other. The connecting part passes through the reversing knob and is fixedly connected to the base, and the cover plate fits against the reversing knob.

[0020] For example, the base further includes a fixing seat. The fixing seat includes a base and a side wall connected to each other. The base is connected to the connection joint, and the side wall is used to fix the accommodating device.

[0021] For example, the side wall includes a plurality of fixing claws, the plurality of fixing claws are circumferentially spaced on the base, the plurality of fixing claws are used to jointly abut against and fix the accommodating device, and each fixing claw can be separated from the accommodating device under the action of an external force.

[0022] For example, the base further includes a puncture needle, the puncture needle is connected to the connection joint, and the puncture needle is used to puncture the accommodating device and communicate the accommodating device with the connection joint.

[0023] For example, the proximal end of the injection joint is connected to the base, the distal end of the injection joint is used to connect the injection device, the injection joint is a cylindrical structure, and the inner diameter dimension of the injection joint gradually increases from the proximal end to the distal end.

[0024] For example, the output joint includes a cylindrical structure and a conical structure, the proximal end of the cylindrical structure is connected to the base, the distal end of the cylindrical structure is connected to the proximal end of the conical structure, the distal end of the conical structure is used to connect the conveying device, and the peripheral radial dimension of the conical structure gradually decreases from the proximal end to the distal end.

[0025] For example, the injection joint is used to connect the injection device, the connection joint is used to connect the accommodating device, and the output joint is used to connect the conveying device. Description of the Drawings

[0026] Figure 1 is a schematic connection diagram (I) of a liquid conveying device with an injection device, an accommodating device and a conveying device according to an embodiment of the present disclosure;

[0027] Figure 2 is a schematic connection diagram (II) of a liquid conveying device with an injection device, an accommodating device and a conveying device according to an embodiment of the present disclosure;

[0028] Figure 3 is a schematic structural diagram (I) of a base according to an embodiment of the present disclosure;

[0029] Figure 4 is a schematic structural diagram (II) of a base according to an embodiment of the present disclosure;

[0030] Figure 5 is a schematic structural diagram (III) of a base according to an embodiment of the present disclosure;

[0031] Figure 6 is a schematic cross-sectional structural diagram of a base according to an embodiment of the present disclosure;

[0032] Figure 7 is a schematic assembly diagram (I) of a liquid conveying device according to an embodiment of the present disclosure;

[0033] Figure 8 Schematic assembly diagram (II) of a liquid delivery device according to an embodiment of the present disclosure;

[0034] Figure 9 Schematic assembly diagram (III) of a liquid delivery device according to an embodiment of the present disclosure;

[0035] Figure 10 Schematic cross-sectional structure diagram of a liquid delivery device according to an embodiment of the present disclosure;

[0036] Figure 11 Schematic assembly diagram of a reversing knob and a fixing member according to an embodiment of the present disclosure;

[0037] Figure 12 Schematic cross-sectional structure diagram of a reversing knob and a fixing member according to an embodiment of the present disclosure;

[0038] Figure 13 Schematic structure diagram (I) of a reversing knob according to an embodiment of the present disclosure;

[0039] Figure 14 Schematic structure diagram (II) of a reversing knob according to an embodiment of the present disclosure;

[0040] Figure 15 Schematic structure diagram (III) of a reversing knob according to an embodiment of the present disclosure;

[0041] Figure 16 Schematic structure diagram of a fixing member according to an embodiment of the present disclosure.

[0042] Reference numerals in the above-mentioned drawings:

[0043] 10 - Liquid delivery device, 20 - Injection device, 30 - Accommodating device, 40 - Delivery device;

[0044] 100 - Base, 110 - Injection port, 111 - Injection joint, 120 - Connection port, 121 - Connection joint, 130 - Output port, 131 - Output joint, 140 - Fixing seat, 141 - Base, 142 - Side wall, 150 - Puncture needle, 160 - Connection hole;

[0045] 200 - Reversing knob, 210 - Groove, 211 - First section, 212 - Second section, 220 - Body, 230 - Screwing part, 231 - Screwing body, 232 - Fixed wall, 234 - Accommodating space;

[0046] 300 - Fixing member, 310 - Cover plate, 320 - Connection part, 321 - Connection antenna. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the present disclosure more comprehensible, the present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present disclosure, rather than limiting the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0048] In the present disclosure, unless otherwise clearly defined and limited, terms such as "connected" and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, a movable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components such as abutment. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. It should be noted that when there are qualifiers before "connected" and "coupled", they have the meanings defined by the corresponding qualifiers, only excluding the obvious cases that need to be excluded, and not excluding other possible cases. For example, "detachable connection" refers to a detachable connection, excluding integration, but movable connection and the like are not excluded.

[0049] In medical treatment, drug delivery is usually involved, especially delivering drugs into the human body. Such drugs include solutions and dry powders, and are generally stored in a containing device 30 when not in use. For solution-type drugs, medical staff generally use an injection device 20 to insert into the containing device 30, draw out the drugs in the containing device 30, separate the injection device 20 from the containing device 30, and then connect the injection device 20 to a delivery device 40 to deliver the drugs into the human body; for dry powder drugs, medical staff generally pre-fill a physiological solution or other liquid into the injection device 20, use the injection device 20 to inject the physiological solution or other liquid into the containing device 30 containing the dry powder drugs, dissolve the dry powder drugs to form a mixed liquid, then draw out the mixed liquid, and finally connect the injection device 20 to the delivery device 40 to deliver the mixed liquid into the human body. This drug delivery method is relatively cumbersome in overall operation, and the number of times of inserting and removing the injection device 20 is relatively large. During the repeated insertion and removal of the injection device 20 by medical staff, the part of the injection device 20 that comes into contact with the drug will be exposed to the air, which may cause contamination of the device and the drug, failing to meet the requirements of aseptic operation. At the same time, the repeated insertion and removal of the injection device 20 may also pose a danger to medical staff.

[0050] For example, for patients who need long-term infusion of liquid medicine, a catheter is generally pre-embedded in the patient's body as a delivery device 40 to avoid multiple needle insertions into the human body. In this case, when it is necessary to deliver liquid medicine to the human body, an injection device 20 such as a syringe is first inserted into a containing device 30 such as a medicine bottle to extract the liquid medicine in the medicine bottle or dissolve the medicine in the medicine bottle and then extract it. Then, the injection device is inserted into the catheter, and the liquid medicine is injected into the human body through the catheter.

[0051] To avoid repeated insertion and extraction of the injection device 20 during liquid delivery, meet the aseptic requirements during liquid delivery, improve the safety performance of liquid delivery, and also avoid potential risks to medical staff caused by the injection device 20, some embodiments of the present disclosure provide a liquid delivery device 10, which can be connected to the injection device 20, the containing device 30, and the delivery device 40 at the same time, and communicate different devices according to the usage requirements, thereby improving the asepticity and safety during liquid delivery.

[0052] Please refer to Figure 1 and Figure 2 , the liquid delivery device 10 includes a base 100 and a reversing knob 200.

[0053] Refer to Figures 3 to 6 , the base 100 is provided with an injection connector 111, a connection connector 121, and an output connector 131. The injection connector 111, the connection connector 121, and the output connector 131 are integrally formed with the base 100.

[0054] Refer to Figures 11 to 15 , the body 220 of the reversing knob 200 is embedded and fitted in the base 100 and is rotatable relative to the base 100. A groove 210 is provided on the outer peripheral wall of the body 220. The groove 210 and the inner peripheral wall of the base 100 cooperate to form a flow channel. The body 220 has a first position and a second position. In response to the body 220 rotating to the first position, the flow channel communicates the injection connector 111 with the connection connector 121; in response to the body 220 rotating to the second position, the flow channel communicates the injection connector 111 with the output connector 131.

[0055] For example, the injection connector 111 is used to connect the injection device 20, the connection connector 121 is used to connect the containing device 30, and the output connector 131 is used to connect the delivery device 40.

[0056] By fitting the body 220 of the commutation knob 200 into the base 100 in an embedded manner, it is convenient for the groove 210 on the outer peripheral wall of the body 220 to cooperate with the inner peripheral wall of the base 100 to form a flow channel. When the body 220 rotates to the first position within the base 100 under an external force, the flow channel connects the injection joint 111 and the connection joint 121, that is, connects the injection device 20 and the accommodation device 30. The injection device 20 can then extract the liquid medicine in the accommodation device 30 or extract the medicine dissolved in the accommodation device 30 after dissolution; when the body 220 rotates to the second position within the base 100 under an external force, the flow channel connects the injection joint 111 and the output joint 131, that is, connects the injection device 20 and the conveying device 40. The injection device 20 can then inject the extracted liquid medicine into the human body through the conveying device 40.

[0057] To ensure the reliability of liquid delivery, the injection joint 111, the connection joint 121, and the output joint 131 are all connected to the base 100 by an integral molding method, which can better achieve the sealing and stability of the connection between each joint and the base 100, and the body 220 of the commutation knob 200 is fitted into the base 100 in an embedded manner, making the connection between the body 220 and the base 100 tighter. When the liquid flows through the flow channel to each joint, no leakage will occur, further improving the sealing performance of the entire device. During the entire liquid delivery process, the injection device 20 does not need to be repeatedly pulled out. Medical staff only need to operate the commutation knob 200 to achieve liquid delivery, greatly improving the sterility and safety during the liquid delivery process.

[0058] The injection device 20, the accommodation device 30, and the conveying device 40 can all be devices produced by any brand and any manufacturer that are applicable to the liquid delivery device 10 in the present disclosure. The injection device 20 is suitable for injecting and extracting liquid after being connected to the base 100 of the liquid delivery device 10. When it is necessary to inject liquid into the accommodation device 30, the injection device 20 also needs to have the function of storing liquid; the accommodation device 30 is suitable for storing and mixing drugs after being connected to the base 100 of the liquid delivery device 10; the conveying device 40 is suitable for conveying liquid drugs after being connected to the base 100 of the liquid delivery device 10. For example, referring to Figure 1 and Figure 2 , when the injection device 20 is a syringe, the accommodation device 30 is a medicine bottle, and the conveying device 40 is a catheter, the base 100 of the liquid delivery device 10 is provided with an injection joint 111 for connecting the syringe, a connection joint 121 for connecting the medicine bottle, and an output joint 131 for connecting the catheter.

[0059] The substance contained in the medicine bottle can be liquid medicine or solid medicine, and the substance contained in the syringe can be liquid or can contain nothing. When the substances contained in both the medicine bottle and the syringe are liquid, at the beginning of the operation, the body 220 of the reversing knob 200 can be rotated relative to the base 100 to the first position to connect the injection joint 111 and the connection joint 121. Use the syringe to inject the liquid inside it into the medicine bottle to achieve the mixing of the two liquids and form a mixed liquid. Then use the syringe to draw out the mixed liquid. At this time, rotate the body 220 of the reversing knob 200 relative to the base 100 to the second position to connect the injection joint 111 and the output joint 131. Then use the syringe to inject the mixed liquid into the human body through the catheter, and finally achieve the injection of the medicine into the human body. If the substance contained in the medicine bottle is liquid and the syringe contains nothing, at the beginning of the operation, also rotate the body 220 of the reversing knob 200 relative to the base 100 to the first position to connect the injection joint 111 and the connection joint 121. Use the syringe to draw out the liquid inside the medicine bottle. Then rotate the body 220 of the reversing knob 200 relative to the base 100 to the second position to connect the injection joint 111 and the output joint 131. Then use the syringe to inject the liquid into the human body through the catheter to achieve the injection of the medicine into the human body. Similarly, if the substance contained in the medicine bottle is solid and the substance contained in the syringe is liquid, at the beginning of the operation, rotate the body 220 of the reversing knob 200 relative to the base 100 to the first position to connect the injection joint 111 and the connection joint 121. Use the syringe to inject the liquid inside it into the medicine bottle to achieve the mixing of the liquid and the solid and form a mixed liquid. Then use the syringe to draw out the mixed liquid. At this time, rotate the body 220 of the reversing knob 200 relative to the base 100 to the second position to connect the injection joint 111 and the output joint 131. Then use the syringe to inject the mixed liquid into the human body through the catheter to achieve the injection of the medicine into the human body.

[0060] Reference Figure 3 、 Figure 4 and Figure 5 , the injection joint 111, the connection joint 121 and the output joint 131 are all arranged on the side wall of the base 100. Also refer to Figure 6 , the injection joint 111, the connection joint 121 and the output joint 131 are arranged in a staggered manner along the axial direction of the base 100. In order to Figure 6For reference, the axial direction of the base 100 is the up-and-down direction. The flow channel includes a main passage section and an auxiliary passage section. The main passage section extends along the circumferential direction of the main body 220. The main passage section is correspondingly arranged with the injection joint 111 along the axial direction of the base 100, and the main passage section is in communication with the injection joint 111, or in response to the rotation of the main body 220, the main passage section is in communication with the injection joint 111; the auxiliary passage section extends at least along the axial direction of the main body 220 and is connected to the main passage section; in response to the main body 220 rotating to the first position, the auxiliary passage section is connected to the connection joint 121, and in response to the main body 220 rotating to the second position, the auxiliary passage section is connected to the output joint 131.

[0061] It should be noted that the main passage section of the flow passage extends along the circumferential direction of the main body 220. When the main passage section is circumferentially arranged around the main body 220 and the main body 220 of the reversing knob 200 is placed in the base 100, the main passage section is correspondingly arranged with the injection joint 111 along the axial direction of the base 100. At this time, regardless of whether the main body 220 of the reversing knob 200 rotates, the main passage section is always in communication with the injection joint 111. When the main passage section only extends a certain distance circumferentially on the main body 220 and the main body 220 of the reversing knob 200 is placed in the base 100, although the main passage section is oppositely arranged with the injection joint 111 along the axial direction of the base 100, the main passage section and the injection joint 111 are not necessarily in communication. If they are in a non-communicating state, then in response to the rotation of the main body, the main passage section and the injection joint 111 can be in communication with each other. In addition, the auxiliary passage section extending at least along the axial direction of the main body 220 includes: the auxiliary passage section only extends along the axial direction of the main body 220, and the auxiliary passage section extends along both the axial direction and the circumferential direction of the main body 220 at the same time. By communicating the main passage section of the flow channel with the injection joint 111, during the rotation of the main body 220 in the base 100, the auxiliary passage section of the flow channel can be selectively communicated with the connection joint 121 or the output joint 131, which is more simple and convenient in operation and can reduce the operation errors of medical staff.

[0062] In some embodiments of the present disclosure, with reference to Figure 11 、 Figures 13 to 15, a groove 210 is provided on the peripheral wall of the body 220. The groove 210 includes a first section 211 and a second section 212. The first section 211 extends along the circumferential direction of the body 220, and the second section 212 extends along the axial direction of the body 220. The second section 212 communicates with the first section 211. When the body 220 is placed in the base 100, the groove 210 formed on the peripheral wall of the body 220 cooperates with the inner peripheral wall of the base 100 to form a flow channel. That is, the main passage section of the flow channel is formed by the cooperation of the first section 211 of the groove 210 and the inner peripheral wall of the base 100. At this time, the main passage section of the flow channel is arranged corresponding to the injection joint 111 along the axial direction of the base 100. The auxiliary passage section of the flow channel is formed by the cooperation of the second section 212 of the groove 210 and the inner peripheral wall of the base 100. At this time, the auxiliary passage section of the flow channel extends along the axial direction of the body 220 and communicates with the main passage section.

[0063] During the rotation of the body 220 of the reversing knob 200 in the base 100, the groove 210 always cooperates with the inner peripheral wall of the base 100 to form a flow channel, so that the shape of the entire flow channel will not change. At the same time, in the axial direction of the base 100, the injection joint 111 is arranged offset from the connection joint 121 and the output joint 131. During the rotation of the body 220, the main passage section of the flow channel is interconnected with the injection joint 111. When the body 220 rotates to the first position, the auxiliary passage section of the flow channel communicates with the connection joint 121. At this time, the injection joint 111 and the connection joint 121 can be connected through the flow channel, and the injection device 20 and the accommodating device 30 can be connected. When the body 220 rotates to the second position, the auxiliary passage section of the flow channel communicates with the output joint 131. At this time, the injection joint 111 and the output joint 131 can be connected through the flow channel, and the injection device 20 and the conveying device 40 can be connected.

[0064] In some embodiments of the present disclosure, the auxiliary passage section and the main passage section are perpendicularly arranged. Through this connection method, the speed of the liquid can be reduced by using the position where the main passage section and the auxiliary passage section are interconnected. For example, when the liquid flows from the main passage section of the flow channel to the auxiliary passage section of the flow channel, the liquid will generate an impact at the connection position of the two sections to form a turbulent flow, thereby reducing the flow rate of the liquid and preventing medical staff from applying too much force to the injection device 20, resulting in too fast a flow rate of the liquid entering the human body and causing damage to the human body.

[0065] For example, refer to Figure 11 and Figure 13, the first section 211 of the groove 210 extends circumferentially on the peripheral wall of the body 220, the second section 212 of the groove 210 communicates with the end position of the first section 211, and the second section 212 is arranged perpendicular to the first section 211. When the body 220 is received inside the base 100, the first section 211 of the groove 210 cooperates with the inner peripheral wall of the base 100 to form the main passage section of the flow channel, and the second section 212 of the groove 210 cooperates with the inner peripheral wall of the base 100 to form the auxiliary passage section of the flow channel. And during the rotation of the body 220, the shape of the entire flow channel does not change. The formed flow channel has an auxiliary passage section that can communicate with the end position of the main passage section, and the auxiliary passage section is perpendicular to the main passage section.

[0066] In some other embodiments of the present disclosure, the auxiliary passage section of the flow channel communicates with the middle part of the main passage section, and the auxiliary passage section is arranged perpendicular to the main passage section. In this way, the speed of the liquid can also be reduced by using the position where the main passage section and the auxiliary passage section communicate with each other. When the liquid flows from the main passage section of the flow channel to the auxiliary passage section of the flow channel, the liquid will first buffer in the main passage section. When the liquid reaches a certain stable state, it will enter the auxiliary passage section through the communication position between the two sections, so as to achieve the effect of reducing the liquid flow rate, and avoid the medical staff applying too much force to the injection device 20, resulting in too fast a flow rate of the liquid entering the human body, thereby causing damage to the human body. For example, the main passage section of the flow channel extends along the circumferential direction of the body 220, and the auxiliary passage section of the flow channel extends along the axial direction of the body 220, so that the overall shape of the flow channel is similar to a "T" shape. When the body 220 rotates in the base 100, the main passage section of the flow channel is always in communication with the injection joint 111, and the auxiliary passage section of the flow channel selectively communicates with the connection joint 121 or the output joint 131.

[0067] In some embodiments of the present disclosure, refer to Figures 11 to 15 , the reversing knob 200 further includes a screwing portion 230 connected to the body 220, and the screwing portion 230 is located outside the base 100. In response to the rotation of the screwing portion 230, the screwing portion 230 drives the body 220 to rotate in the base 100 to the first position or the second position. By accommodating the body 220 in the base 100, the groove 210 on the outer peripheral wall of the body 220 is used to cooperate with the inner peripheral wall of the base 100 to form a flow channel, and the screwing portion 230 is located outside the base 100. In specific operations, medical staff can apply a rotational force to the screwing portion 230, and use the screwing portion 230 to drive the body 220 to rotate circumferentially in the base 100. Compared with directly operating the body 220 to rotate circumferentially in the base 100, it is simpler and more convenient.

[0068] In some other embodiments of the present disclosure, the radial dimension of the screwing portion 230 is greater than that of the main body 220. The end portion of the base 100 includes an opening structure, and the main body 220 is accommodated in the base 100 through the opening structure, and the screwing portion 230 abuts against the end portion of the base 100. With this arrangement, by abutting the screwing portion 230 against the end portion of the base 100, the gap between the screwing portion 230 and the end portion of the base 100 is avoided, so that the main body 220 can be completely accommodated inside the base 100 through the opening structure without protruding from the base 100 through the opening structure. The structure of the entire liquid delivery device is more compact, and the liquid delivery process is also more stable. For example, the screwing portion 230 and the main body 220 are coaxially arranged, that is, the central axes of the screwing portion 230 and the main body 220 coincide with each other. The main body 220 is inserted and accommodated inside the base 100 through the end portion of the base 100. At this time, since the radial dimension of the screwing portion 230 is greater than that of the main body 220, the screwing portion 230 can abut against the end portion of the base 100.

[0069] In some embodiments of the present disclosure, both the main body 220 and the screwing portion 230 of the reversing knob 200 are cylindrical structures, and the central axes of the main body 220 and the screwing portion 230 coincide with each other. With this structural arrangement, when the screwing portion 230 drives the main body 220 to rotate circumferentially in the base 100, the two can rotate coaxially, which is more labor-saving for the operator.

[0070] In some embodiments of the present disclosure, referring to Figure 10 and Figure 11 , the screwing portion 230 includes a screwing body 231 and a fixed wall 232. The screwing body 231 abuts against the end portion of the base 100, and the fixed wall 232 is connected to the screwing body 231. Referring to Figure 12 and Figure 13 , along the axial direction of the main body 220, a receiving space 234 is formed between the portion of the main body 220 corresponding to the fixed wall 232 and the fixed wall 232, and the end portion of the base 100 is accommodated in the receiving space 234. Taking Figure 12 as a reference, the axial direction of the main body 220 is the up and down direction.

[0071] In actual design, the size of the receiving space 234 can be adjusted as needed to correspond to the thickness dimension of the end portion of the base 100, so that the end portion of the base 100 can be snapped into the receiving space 234, better restricting the degrees of freedom of the reversing knob 200 relative to the base 100 other than the rotation direction, and increasing the stability and reliability of the entire device during use.

[0072] For example, when the body 220 of the reversing knob 200 is received within the base 100, the screwing body 231 of the screwing portion 230 abuts against the end of the base 100. Since the radial dimension of the screwing body 231 is greater than the radial dimension of the end of the base 100, the screwing body 231 can completely cover and abut against the end of the base 100. The fixed wall 232 is a ring-shaped wall structure and is connected to the edge portion of the screwing body 231. When the screwing body 231 abuts against the end of the base 100, the fixed wall 232 is located outside the periphery of the end of the base 100. Refer to Figure 12 , the axial direction of the body 220 is the up and down direction. If the extension length of the fixed wall 232 in the axial direction is L, the specific portion of the body 220 corresponding to the fixed wall 232 refers to: starting from the end where the body 220 is connected to the screwing body 231, the portion corresponding to an extension length of L along the axial direction towards the other end of the body 220. An annular accommodation space 234 can be formed between the portion of the body 220 corresponding to the fixed wall 232 and the fixed wall 232. When the body 220 of the reversing knob 200 is inserted into the interior of the base 100, the screwing body 231 of the screwing portion 230 abuts against the end of the base 100, and the end of the base 100 can be received within the accommodation space 234, thereby restricting the degrees of freedom of the reversing knob 200 relative to the base 100 except in the rotational direction.

[0073] As described above, the base 100 is provided with an injection joint 111, a connection joint 121, and an output joint 131. Refer to Figure 6 , an injection port 110 for connecting the injection joint 111, a connection port 120 for connecting the connection joint 121, and an output port 130 for connecting the output joint 131 are provided on the side wall of the base 100. Refer to Figure 10 and Figure 11 , the width dimensions of the grooves 210 are all greater than the radial dimensions of the injection port 110, the connection port 120, and the output port 130.

[0074] When the width dimension of the groove 210 is greater than the radial dimensions of the injection port 110, the connection port 120, and the output port 130, the flow channel formed by the cooperation of the groove 210 and the inner peripheral wall of the base 100 can completely cover the injection port 110, the connection port 120, and the output port 130. When the liquid in the flow channel flows into the injection joint 111 through the injection port 110, into the connection joint 121 through the connection port 120, and into the output joint 131 through the output port 130, no leakage will occur at the connection between the flow channel and each port, further improving the sealing performance during the liquid delivery process.

[0075] For example, after the body 220 of the reversing knob 200 is fitted into the interior of the base 100 in an embedded manner, the peripheral wall of the body 220 fits against the inner peripheral wall of the base 100. The groove 210 on the body 220 and the inner peripheral wall of the base 100 cooperate with each other to form a flow channel, and the width dimension of this flow channel is the width dimension of the groove 210. For another example, referring to Figure 6 , the shapes of the injection port 110, the connection port 120, and the output port 130 are all circular shapes, and the radial dimensions of the injection port 110, the connection port 120, and the output port 130 are the diameter dimensions of the circular shapes. Referring to Figure 13 , the width dimension of the groove 210 specifically includes the dimension of the first section 211 in the axial direction of the body 220 and the dimension of the second section 212 in the circumferential direction of the body 220. After the body 220 is fitted into the base 100 in an embedded manner, the main passage section of the flow channel corresponds to the injection port 110 and can completely cover the injection port 110. When the body 220 rotates to the first position within the base 100, the auxiliary passage section of the flow channel corresponds to the connection port 120 and can completely cover the connection port 120. When the body 220 rotates to the second position within the base 100, the auxiliary passage section of the flow channel corresponds to the output port 130 and can completely cover the output port 130.

[0076] Referring to Figure 1 , Figure 7 and Figure 9 as shown, the liquid delivery device 10 further includes a fixing member 300;

[0077] Referring to Figures 10 - 12 , Figure 16 , the fixing member 300 includes a cover plate 310 and a connecting portion 320 that are connected to each other. The connecting portion 320 passes through the reversing knob 200 and is fixedly connected to the base 100, and the cover plate 310 fits against the reversing knob 200.

[0078] After the body 220 of the reversing knob 200 is fitted into the interior of the base 100 in an embedded manner, by using one end of the connecting portion 320 to pass through the reversing knob 200 and be relatively fixed to the bottom of the base 100, and then fitting the cover plate 310 against the reversing knob 200, axial limiting of the reversing knob 200 can be achieved, avoiding axial relative movement while the reversing knob 200 rotates within the base 100, and further avoiding the reversing knob 200 detaching from the base 100.

[0079] Meanwhile, during the use of the liquid delivery device 10, if the body 220 of the reversing knob 200 moves axially within the base 100, it may cause the body 220 to fail to accurately switch between the first position and the second position within the base 100, thereby preventing the connection between the corresponding joints. For example, the flow channel formed by the cooperation between the groove 210 on the outer peripheral wall of the body 220 and the inner peripheral wall of the base 100 is axially misaligned with the corresponding joint, resulting in the flow channel being unable to connect the corresponding joints no matter how the body 220 rotates within the base 100. Therefore, in the present disclosure, by providing the groove 210 on the outer peripheral wall of the body 220, using the groove 210 to cooperate with the inner peripheral wall of the base 100 to form a flow channel, and then passing the fixing member 300 through the reversing knob 200 to limit the axial movement of the reversing knob 200 relative to the base 100, the stability and reliability of the entire liquid delivery device 10 during use can be better ensured.

[0080] For example, a through hole is provided inside the overall structure of the reversing knob 200. For another example, the connecting portion 320 is in a rod-like structure. One end of the connecting portion 320 passes through the entire reversing knob 200 through the through hole, and is fixedly connected to the bottom of the base 100. The cover plate 310 of the fixing member 300 is connected to the tail end of the connecting portion 320, and the cover plate 310 fits against the reversing knob 200.

[0081] In some embodiments of the present disclosure, referring to Figure 4 、 Figure 8 、 Figure 11 and Figure 12 , one of the bottom surface of the base 100 and the end of the connecting portion 320 is provided with a connecting hole 160, and the other is provided with a connecting antenna 321. In response to the connecting portion 320 passing through the reversing knob 200, the connecting antenna 321 is inserted into the connecting hole 160 and is in interference fit with the connecting hole 160. The end of the connecting portion 320 is fixed to the base 100 by interference fit, and at the same time, in cooperation with the cover plate 310 of the fixing member 300, axial limit of the reversing knob 200 is achieved, preventing the reversing knob 200 from moving axially relative to the base 100 while rotating within the base 100.

[0082] For example, four connecting holes 160 are provided on the bottom surface of the base 100, and the four connecting holes 160 are arranged circumferentially. The end of the connecting portion 320 is correspondingly provided with four connecting antennas 321, and the four connecting antennas 321 are also arranged circumferentially. When the connecting portion 320 of the fixing member 300 passes through the reversing knob 200, each connecting antenna 321 at the end of the connecting portion 320 is respectively inserted into one of the connecting holes 160, and the connecting antenna 321 and the corresponding connecting hole 160 are in interference fit.

[0083] Referring to Figures 1 to 9, the base 100 of the liquid delivery device 10 further includes a fixing base 140. The fixing base 140 includes a base 141 and a side wall 142 that are connected to each other. The base 141 is connected to the connection joint 121, and the side wall 142 is used to fixedly accommodate the device 30.

[0084] Before actual operation, medical staff can install the accommodating device 30 on the fixing base 140 in a specific environment according to needs, so as to realize the connection and fixation of the fixing base 140 relative to the base 100. In a specific use scenario, there is no need to connect the accommodating device 30 again, and it can be directly used, avoiding cross-infection during use. For example, before actual operation, in order to avoid cross-infection, medical staff place the accommodating device 30 in the fixed space formed by enclosing the base 141 and the side wall 142 in a sterile environment. The accommodating device 30 abuts against the base 141, and the accommodating device 30 can be communicated with the base 100 through the connection joint 121. The side wall 142 abuts against the accommodating device 30 to realize the fixation of the accommodating device 30.

[0085] In some embodiments of the present disclosure, the side wall 142 includes a plurality of fixing claws. The plurality of fixing claws are circumferentially spaced on the base 141. The plurality of fixing claws are used to jointly abut against and fix the accommodating device 30, and each fixing claw can be separated from the accommodating device 30 under the action of an external force. By adopting the structural design of the fixing claws, it is more convenient to fix the accommodating device 30, and the opening size of the plurality of fixing claws can be correspondingly adjusted according to the size of the accommodating device 30, with a wider application range.

[0086] For example, referring to Figures 3 to 5 , the number of fixing claws is set to six. These fixing claws are all connected to the edge position of the base 141 and are circumferentially spaced on the base 141. The first ends of these fixing claws are fixed relative to the base 141, and the second ends are not fixed, so that the second ends of these fixing claws can approach or move away from each other under the action of an external force. When the second ends of these fixing claws approach each other, the opening structure formed by them is smaller. When the second ends of these fixing claws move away from each other, the opening structure formed by them is larger. During the connection of the accommodating device 30, the second ends of the fixing claws can be first acted on, so that the second ends of these fixing claws move away from each other. When the accommodating device 30 abuts against the base 141, the entire fixing claw can abut against the side wall of the accommodating device 30, thereby realizing the clamping and fixing of the accommodating device 30. If it is necessary to disassemble the accommodating device 30 from the base 100, an external force can be applied to these fixing claws to make the second ends of the fixing claws disengage from the accommodating device 30, and then the accommodating device 30 can be removed from the fixing base 140. If the force exerted by these fixing claws on the accommodating device 30 is not particularly large, an external force can also be directly applied to the accommodating device 30 to make the accommodating device 30 overcome the friction with the fixing claws and then disengage from the clamping of these fixing claws.

[0087] In some embodiments of the present disclosure, with reference to Figure 8 , the base 100 further includes a puncture needle 150. The puncture needle 150 is connected to the connection joint 121. The puncture needle 150 is used to puncture the accommodating device 30 and communicate the accommodating device 30 with the connection joint 121. Through the arrangement of the puncture needle 150, the accommodating device 30 can be communicated with the connection joint 121 during the installation process, which is more convenient in operation. At the same time, the sealing performance of the connection between the accommodating device 30 and the connection joint 121 can be increased.

[0088] For example, with reference to Figure 5 and Figure 8 , when the first end of the connection joint 121 is connected to the base 100 through the connection port 120, the second end of the connection joint 121 is vertically connected to the base 141, and the puncture needle 150 is connected to the second end of the connection joint 121. When a fixing space is formed by enclosing between the side wall 142 of the fixing seat 140 and the base 141, the puncture needle 150 is arranged in the fixing space. When the accommodating device 30 is installed on the fixing seat 140, the puncture needle 150 is used to puncture the inside of the accommodating device 30, thereby realizing the communication between the accommodating device 30 and the connection joint 121.

[0089] In some embodiments of the present disclosure, the injection joint 111 includes a proximal end and a distal end. With reference to Figures 1 to 6 , the proximal end of the injection joint 111 is connected to the base 100, the distal end of the injection joint 111 is used to connect the injection device 20, the injection joint 111 is of a cylindrical structure, and the inner diameter dimension of the injection joint 111 gradually increases from its proximal end to its distal end. Through this structural arrangement, the injection head of the injection device 20 can be inserted into the distal end of the injection joint 111, so that the injection device 20 and the injection joint 111 are communicated with each other. At the same time, the sealing performance of the connection can be ensured, and liquid leakage at the connection can be avoided.

[0090] In some embodiments of the present disclosure, with reference to Figures 1 to 10 , the output joint 131 includes a columnar structure and a conical structure. The proximal end of the columnar structure is connected to the base 100, the distal end of the columnar structure is connected to the proximal end of the conical structure, and the distal end of the conical structure is used to connect the conveying device 40. The outer peripheral radial dimension of the conical structure gradually decreases from its proximal end to its distal end. Through this structural arrangement, the conveying device 40 can be directly and tightly sleeved on the distal end of the conical structure, thereby realizing the sealed connection between the conveying device 40 and the output joint 131.

[0091] In summary, this embodiment discloses a liquid delivery device 10, including a base 100, a reversing knob 200, and a fixing member 300. An injection joint 111, a connection joint 121, and an output joint 131 are provided on the base 100. The injection joint 111, the connection joint 121, and the output joint 131 are integrally formed with the base 100, which can preferably achieve the sealing performance and stability of the connection between each joint and the base 100. A groove 210 is provided on the outer peripheral wall of the reversing knob 200. A part of the body 220 of the reversing knob 200 is embedded and fitted in the base 100 and is rotatable relative to the base 100. A groove 210 is provided on the outer peripheral wall of the body 220. The groove 210 and the inner peripheral wall of the base 100 cooperate to form a flow channel. This structure makes the connection between the body 220 of the reversing knob 200 and the base 100 tighter, and no leakage will occur when the liquid flows through the flow channel to each joint, further improving the sealing performance of the entire device.

[0092] It should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0093] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present disclosure, and they are not used to limit the protection scope of the present disclosure. Any equivalent embodiments or changes made without departing from the technical spirit of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A liquid delivery device, characterized in that: include: A base, wherein the base is provided with an injection joint, a connection joint and an output joint, and the injection joint, the connection joint and the output joint are all integrally formed with the base; A reversing knob, the body of which is embedded in the base and rotatable relative to the base, the outer wall of the body being provided with a groove, the groove cooperating with the inner wall of the base to form a flow channel; The body has a first position and a second position. In response to the body rotating to the first position, the flow channel connects the injection connector with the connection connector; in response to the body rotating to the second position, the flow channel connects the injection connector with the output connector.

2. The liquid delivery device according to claim 1, characterized in that: The injection joint, the connection joint and the output joint are all arranged on the side wall of the base, and the injection joint, the connection joint and the output joint are staggered along the axial direction of the base; The flow channel includes a main passage section and an auxiliary passage section, wherein the main passage section extends along the circumferential direction of the body, the main passage section is arranged corresponding to the injection joint along the axial direction of the base, and the main passage section and the injection joint are communicated with each other, or in response to the rotation of the body, the main passage section and the injection joint are communicated with each other; The auxiliary passage section extends at least along the axial direction of the body and is connected to the main passage section. In response to the body rotating to the first position, the auxiliary passage section is connected to the connecting joint. In response to the body rotating to the second position, the auxiliary passage section is connected to the output joint.

3. The liquid delivery device according to claim 1, characterized in that: The reversing knob further includes a screwing portion connected to the body, wherein the screwing portion is located outside the base; in response to rotation of the screwing portion, the screwing portion drives the body to rotate in the base to the first position or the second position.

4. The liquid delivery device according to claim 3, characterized in that: The radial dimension of the screwing portion is greater than the radial dimension of the body, the end of the base includes an opening structure, the body is accommodated in the base through the opening structure, and the screwing portion abuts against the end of the base.

5. The liquid delivery device according to claim 3, characterized in that: The screwing part includes a screwing body and a fixed wall, the screwing body abuts against an end of the base, and the fixed wall is connected to the screwing body; Along the axial direction of the body, an accommodation space is formed between a portion of the body corresponding to the fixed wall and the fixed wall, and an end portion of the base is accommodated in the accommodation space.

6. The liquid delivery device according to claim 3, characterized in that: The body and the screwing part are both column structures, and the central axes of the body and the screwing part coincide with each other.

7. The liquid delivery device according to claim 1, characterized in that: The side wall of the base is provided with an injection port connected to the injection connector, a connection port connected to the connection connector, and an output port connected to the output connector, and the width of the groove is larger than the radial dimensions of the injection port, the connection port, and the output port.

8. The liquid delivery device according to claim 1, characterized in that: The liquid delivery device also includes a fixing member, which includes a cover plate and a connecting portion that are connected to each other. The connecting portion is penetrated by the reversing knob and is fixedly connected to the base. The cover plate is attached to the reversing knob.

9. The liquid delivery device according to claim 1, characterized in that: The base also includes a fixing base, which includes a base and side walls that are connected to each other. The base is connected to the connecting joint, and the side walls are used to fix the accommodating device.

10. The liquid delivery device according to claim 9, characterized in that: The side wall includes a plurality of fixing claws, which are circumferentially spaced apart on the base, and are used to abut against and fix the accommodating device together, and each of the fixing claws can be separated from the accommodating device under the action of an external force.

11. The liquid delivery device according to claim 1, characterized in that: The base further comprises a puncture needle, which is connected to the connection joint and is used for puncturing the containing device and connecting the containing device to the connection joint.

12. The liquid delivery device according to claim 1, characterized in that: The proximal end of the injection connector is connected to the base, and the distal end of the injection connector is used to connect to an injection device. The injection connector is a cylindrical structure, and the inner diameter of the injection connector gradually increases from the proximal end to the distal end.

13. The liquid delivery device according to claim 1, characterized in that: The output connector includes a column structure and a cone structure, wherein the proximal end of the column structure is connected to the base, the distal end of the column structure is connected to the proximal end of the cone structure, the distal end of the cone structure is used to connect to the conveying device, and the outer radial size of the cone structure gradually decreases from the proximal end to the distal end.

14. The liquid delivery device according to claim 1, characterized in that: The injection connector is used to connect to an injection device, the connection connector is used to connect to a containing device, and the output connector is used to connect to a conveying device.

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