Liquid delivery device

Abstract

A liquid conveying device comprises a base, a reversing knob and a fixing piece, and the base is provided with an injection port, a connecting port and an output port; a body of the reversing knob is rotatably accommodated in the base, a groove is formed in the outer peripheral wall of the body, and the groove is matched with the inner peripheral wall of the base to form a flowing channel; the fixing piece penetrates through the reversing knob and limits the axial movement of the reversing knob relative to the base; the body has a first position and a second position, the flow channel communicates the injection port with the connection port in response to rotation of the body to the first position, and the flow channel communicates the injection port with the output port in response to rotation of the body to the second position. By means of the arrangement, the ports in the base can be used for being connected with corresponding devices, then the body of the reversing knob is rotated, communication of the different ports is achieved, mixing and conveying of medicine are achieved, then cross infection is reduced, and sterile operation is achieved.

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 an injection device can be used to directly extract and then deliver them into the human body. 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 to extract the drug in the containing device. After separating the injection device from the containing device, the injection device is then connected 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 injection device is used to inject the physiological solution into the containing device containing solids such as dry powder. After the solids are dissolved to form a mixed liquid, the mixed liquid is then extracted. 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 includes a base, a reversing knob, and a fixing member. The base is provided with an injection port, a connection port, and an output port;

[0007] The body of the reversing knob is rotatably received in the base. A groove is provided on the outer peripheral wall of the body, and the groove and the inner peripheral wall of the base cooperate to form a flow channel; the fixing member passes through the reversing knob and restricts the axial movement of the reversing knob relative to the base;

[0008] 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 port and the connection port. In response to the body rotating to the second position, the flow channel connects the injection port and the output port.

[0009] For example, the injection port, the connection port, and the output port are all provided on the side wall of the base, and the injection port, the connection port, and the output port are arranged offset in the axial direction of the base;

[0010] 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 disposed corresponding to the injection port along the axial direction of the base. The main passage section is in communication with the injection port, or in response to the rotation of the body, the main passage section is in communication with the injection port.

[0011] The auxiliary passage section at least extends along the axial direction of the body and is communicated with the main passage section. In response to the body rotating to the first position, the auxiliary passage section is communicated with the connection port. In response to the body rotating to the second position, the auxiliary passage section is communicated with the output port.

[0012] For example, the auxiliary passage section is disposed perpendicular to the main passage section.

[0013] For example, the auxiliary passage section includes an arc-shaped structure, and the auxiliary passage section is smoothly transitionally communicated with the main passage section through the arc-shaped structure.

[0014] For example, the reversing knob further includes a screwing portion connected to the body, and the screwing portion is located outside the base. In response to the rotation of the screwing portion, the screwing portion drives the body to rotate to the first position or the second position within the base.

[0015] For example, 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, and the body is accommodated within the base through the opening structure, and the screwing portion abuts against the end of the base.

[0016] For example, the screwing portion includes a screwing body and a fixed wall. The screwing body abuts against the end of the base, and the fixed wall is connected to the screwing body.

[0017] Along the axial direction of the body, a receiving space is formed between the portion of the body corresponding to the fixed wall and the fixed wall, and the end of the base is accommodated within the receiving space.

[0018] For example, a limiting member is provided on the outer wall surface of the base. The limiting member includes a first limiting portion and a second limiting portion, and a protruding portion is provided on the screwing portion.

[0019] In response to the screwing portion rotating in the first direction, the protruding portion is limited by the first limiting portion to limit the screwing portion from continuing to rotate in the first direction, and the screwing portion drives the body to be located at the first position within the base.

[0020] In response to the screwing portion rotating in the second direction, the protruding portion is limited by the second limiting portion to limit the screwing portion from continuing to rotate in the second direction, and the screwing portion drives the body to be located at the second position within the base.

[0021] For example, the limiting member is an annular protrusion extending circumferentially on the outer wall surface of the base, and the two ends of the annular protrusion are the first limiting portion and the second limiting portion respectively.

[0022] For example, the fixing member includes a cover plate and a connecting portion connected to each other. The connecting portion passes through the reversing knob and is fixedly connected to the base, and the cover plate is attached to the reversing knob.

[0023] For example, the reversing knob is provided with a recessed portion, and the cover plate is accommodated in the recessed portion and attached to the bottom surface of the recessed portion.

[0024] For example, a guiding column is arranged inside the base. The guiding column is arranged along the axial direction of the base. One end of the connecting portion away from the cover plate includes an opening structure; in response to the connecting portion passing through the reversing knob, the guiding column passes through the inside of the connecting portion through the opening structure.

[0025] For example, one of the bottom surface of the base and the first end of the connecting portion is provided with a connecting hole, and the other is provided with a connecting antenna. In response to the connecting portion passing through the reversing knob, the connecting antenna is inserted into the connecting hole and is in interference fit with the connecting hole.

[0026] For example, the injection port is used to connect an injection device, the connection port is used to connect a containing device, and the output port is used to connect a conveying device. Description of the Drawings

[0027] Figure 1 is a schematic connection diagram (one) of the liquid conveying device, the injection device, the containing device and the conveying device according to an embodiment of the present disclosure;

[0028] Figure 2 is a schematic connection diagram (two) of the liquid conveying device, the injection device, the containing device and the conveying device according to an embodiment of the present disclosure;

[0029] Figure 3 is a schematic connection diagram (three) of the liquid conveying device, the injection device, the containing device and the catheter of the conveying device according to an embodiment of the present disclosure;

[0030] Figure 4 is a schematic structural diagram of a base according to an embodiment of the present disclosure;

[0031] Figure 5 is Figure 4 a front structural diagram of the shown base;

[0032] Figure 6 is a schematic sectional structural diagram of a base according to an embodiment of the present disclosure;

[0033] Figure 7 Schematic diagram (I) of the assembly of the liquid delivery device according to an embodiment of the present disclosure;

[0034] Figure 8 Schematic diagram (II) of the assembly of the liquid delivery device according to an embodiment of the present disclosure;

[0035] Figure 9 Schematic diagram (III) of the assembly of the liquid delivery device according to an embodiment of the present disclosure;

[0036] Figure 10 Schematic cross-sectional view of the liquid delivery device according to an embodiment of the present disclosure;

[0037] Figure 11 Schematic connection diagram of the reversing knob and the fixing member according to an embodiment of the present disclosure;

[0038] Figure 12 is Figure 11 Schematic cross-sectional view of the reversing knob and the fixing member shown;

[0039] Figure 13 Schematic diagram (I) of the structure of the reversing knob according to an embodiment of the present disclosure;

[0040] Figure 14 Schematic diagram (II) of the structure of the reversing knob according to an embodiment of the present disclosure;

[0041] Figure 15 Schematic diagram (III) of the structure of the reversing knob according to an embodiment of the present disclosure;

[0042] Figure 16 Schematic diagram of the structure of the base on one side of the first limiting portion according to an embodiment of the present disclosure;

[0043] Figure 17 Schematic diagram of the structure of the base on one side of the second limiting portion according to an embodiment of the present disclosure.

[0044] Reference numerals of the above-mentioned drawings:

[0045] 10 - Liquid delivery device, 20 - Injection device, 30 - Accommodating device, 40 - Delivery device;

[0046] 100 - Base, 110 - Injection port, 111 - First connector, 120 - Connection port, 121 - Second connector, 130 - Output port, 131 - Third connector, 140 - Annular protrusion, 141 - First limiting portion, 142 - Second limiting portion, 150 - Guide post, 160 - Connection hole;

[0047] 200 - Commutation knob, 210 - Groove, 211 - First section, 212 - Second section, 220 - Body, 230 - Screwing part, 231 - Screwing body, 232 - Fixed wall, 233 - Protrusion, 234 - Accommodation space, 240 - Depression;

[0048] 300 - Fixing piece, 310 - Cover plate, 320 - Connecting part, 321 - Connecting antenna. Detailed implementation manner

[0049] In order to make the purpose, technical solutions and advantages of the present disclosure clearer and more understandable, the following further details the present disclosure in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0050] In the present disclosure, unless otherwise clearly specified and limited, terms such as "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a movable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can 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 limited modifiers before "connected" and "connected", they have the meanings defined by the corresponding limited modifiers, only excluding the obvious situations that need to be excluded, and not excluding other possible situations. For example, "detachable connection" refers to a detachable connection, excluding being integrated, but movable connections, etc. are not excluded.

[0051] In medical treatment, drug delivery is usually involved, especially delivering drugs into the human body. Such drugs include solutions and dry powders, which 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, extract the drug in the containing device 30, separate the injection device 20 from the containing device 30, and then use the injection device 20 to connect to a delivery device 40 to deliver the drug 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 drug, dissolve the dry powder drug to form a mixed liquid, then extract 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 has a relatively cumbersome overall operation, and the injection device 20 needs to be pulled out and inserted relatively many times. During the process of repeatedly pulling out and inserting 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 pulling out and inserting of the injection device 20 may also pose a danger to surrounding personnel.

[0052] For example, for patients who need long-term infusion of liquid medicine, a catheter is generally pre-embedded in the patient's body as the 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 needs to be used to first insert into a containing device 30 such as a medicine bottle, extract the liquid medicine in the medicine bottle or dissolve the drug in the medicine bottle and then extract it, and then insert the syringe into the catheter to inject the liquid medicine into the human body through the catheter.

[0053] In order to avoid the repeated pulling out and inserting of the injection device 20 during liquid delivery, meet the aseptic requirements during liquid delivery, improve the safety performance of liquid delivery, and at the same time avoid the possible danger posed by the injection device 20 to surrounding personnel, 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.

[0054] Please refer to Figure 1 、 Figure 2 and Figure 3 , the liquid delivery device 10 includes a base 100, a reversing knob 200, and a fixing member 300.

[0055] Refer to Figure 4 、 Figure 5 and Figure 6, the base 100 is provided with an injection port 110, a connection port 120 and an output port 130.

[0056] Reference Figures 11 to 15 , the body 220 of the reversing knob 200 is rotatably received in the base 100, and 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; Reference Figures 7 to 10 , the fixing member 300 passes through the reversing knob 200 and restricts the axial movement of the reversing knob 200 relative to the base 100.

[0057] 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 connects the injection port 110 and the connection port 120. In response to the body 220 rotating to the second position, the flow channel connects the injection port 110 and the output port 130.

[0058] By providing the groove 210 on the outer peripheral wall of the body 220 in the reversing knob 200, when the body 220 is rotatably received in the base 100, it is convenient for the groove 210 to cooperate with the inner peripheral wall of the base 100 to form a flow channel, and at the same time, a through space is left inside the reversing knob 200 for the fixing member 300 to pass through; the fixing member 300 passes through the reversing knob 200 and restricts the axial movement of the reversing knob 200 relative to the base 100, so that the body 220 of the reversing knob 200 can only rotate inside the base 100, thus preventing the reversing knob 200 from detaching from the base 100 when it is operated, ensuring the stability and reliability of the entire liquid delivery device 10 during use, and further improving the sterility and safety of the liquid delivery process.

[0059] For example, the injection port 110 is used to connect the injection device 20, the connection port 120 is used to connect the accommodating device 30, and the output port 130 is used to connect the delivery device 40.

[0060] When the body 220 of the reversing knob 200 rotates to the first position within the base 100 under the action of an external force, the flow channel connects the injection port 110 to the connection port 120, that is, connects the injection device 20 to the accommodation device 30. The injection device 20 can then extract the liquid medicine within the accommodation device 30 or dissolve the medicine within the accommodation device 30 and then extract it. When the body 220 of the reversing knob 200 rotates to the second position within the base 100 under the action of an external force, the flow channel connects the injection port 110 to the output port 130, that is, connects the injection device 20 to the delivery device 40. The injection device 20 can then inject the extracted liquid medicine into the human body through the delivery device 40. During the entire liquid delivery process, the injection device 20 does not need to be repeatedly inserted and removed. Medical staff only need to operate the reversing knob 200 to achieve liquid delivery, greatly improving the sterility and safety during the liquid delivery process.

[0061] The injection device 20, the accommodation device 30, and the delivery 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 capable of 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 capable of storing and mixing medicine after being connected to the base 100 of the liquid delivery device 10; the delivery device 40 is capable of delivering liquid medicine after being connected to the base 100 of the liquid delivery device 10.

[0062] For example, refer to Figures 1 to 3, when the injection device 20 is a syringe, the accommodating device 30 is a medicine bottle, and the delivery device 40 is a catheter, the base 100 of the liquid delivery device 10 is provided with an injection port 110 for connecting the syringe, a connection port 120 for connecting the medicine bottle, and an output port 130 for connecting the catheter. The substance contained in the medicine bottle can be a liquid medicine or a solid medicine, and the substance contained in the syringe can be a liquid or can contain nothing. When the substances contained in both the medicine bottle and the syringe are liquids, at the beginning of the operation, the body 220 of the reversing knob 200 can first be rotated relative to the base 100 to the first position to connect the injection port 110 and the connection port 120, and the liquid inside the syringe is injected into the medicine bottle by using the syringe to achieve the mixing of the two liquids to form a mixed liquid, and then the mixed liquid is drawn out by using the syringe. At this time, the body 220 of the reversing knob 200 is rotated relative to the base 100 to the second position to connect the injection port 110 and the output port 130, and then the mixed liquid is injected into the human body through the catheter by using the syringe, finally realizing the injection of the medicine into the human body. If the substance contained in the medicine bottle is a liquid and the syringe contains nothing, at the beginning of the operation, the body 220 of the reversing knob 200 is also first rotated relative to the base 100 to the first position to connect the injection port 110 and the connection port 120, and the liquid inside the medicine bottle is drawn out by using the syringe, and then the body 220 of the reversing knob 200 is rotated relative to the base 100 to the second position to connect the injection port 110 and the output port 130, and then the liquid is injected into the human body through the catheter by using the syringe, realizing the injection of the medicine into the human body. Similarly, if the substance contained in the medicine bottle is a solid and the substance contained inside the syringe is a liquid, at the beginning of the operation, the body 220 of the reversing knob 200 is rotated relative to the base 100 to the first position to connect the injection port 110 and the connection port 120, and the liquid inside the syringe is injected into the medicine bottle by using the syringe to achieve the mixing of the liquid and the solid to form a mixed liquid, and then the mixed liquid is drawn out by using the syringe. At this time, the body 220 of the reversing knob 200 is rotated relative to the base 100 to the second position to connect the injection port 110 and the output port 130, and then the mixed liquid is injected into the human body through the catheter by using the syringe, realizing the injection of the medicine into the human body.

[0063] To more conveniently connect the injection port 110 of the base 100 with the syringe, the connection port 120 with the medicine bottle, and the output port 130 with the catheter, corresponding connectors can also be provided on the base 100. For example, referring to Figures 4 to 10, the base 100 is provided with a first connector 111, a second connector 121 and a third connector 131 on its peripheral wall. Among them, the proximal end of the first connector 111 is connected to the injection port 110 of the base 100, the distal end of the first connector 111 is connected to a syringe, the proximal end of the second connector 121 is connected to the connection port 120 of the base 100, the distal end of the second connector 121 is connected to a medicine bottle, and the proximal end of the third connector 131 is connected to the output port 130 of the base 100, and the distal end of the third connector 131 is connected to a catheter. It should be noted that in some other embodiments, if the injection device 20, the accommodating device 30 and the delivery device 40 adopt devices with other structures, the first connector 111, the second connector 121 and the third connector 131 may not be provided on the peripheral wall of the base 100, or may be selectively provided according to actual needs.

[0064] Reference Figure 4 , Figure 5 and Figure 6 , the injection port 110, the connection port 120 and the output port 130 are all provided on the side wall of the base 100, and the injection port 110, the connection port 120 and the output port 130 are arranged in a staggered manner along the axial direction of the base 100. Taking Figure 6 as a 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, and the main passage section is correspondingly arranged with the injection port 110 along the axial direction of the base 100, and the main passage section is in communication with the injection port 110, or in response to the rotation of the main body 220, the main passage section is in communication with the injection port 110; the auxiliary passage section at least extends along the axial direction of the main body 220 and communicates with the main passage section. In response to the main body 220 rotating to the first position, the auxiliary passage section communicates with the connection port 120, and in response to the main body 220 rotating to the second position, the auxiliary passage section communicates with the output port 130.

[0065] It should be noted that the main passage section of the flow passage extends along the circumferential direction of the body 220. When the main passage section is circumferentially arranged around the body 220 and the body 220 of the reversing knob 200 is placed in the base 100, the main passage section is arranged corresponding to the injection port 110 along the axial direction of the base 100. At this time, regardless of whether the body 220 of the reversing knob 200 rotates, the main passage section is always in communication with the injection port 110. When the main passage section only extends a certain distance circumferentially on the body 220 and the body 220 of the reversing knob 200 is placed in the base 100, although the main passage section is arranged opposite to the injection port 110 along the axial direction of the base 100, the main passage section and the injection port 110 are not necessarily in communication. If they are in a non-communicating state, then in response to the rotation of the body, the main passage section and the injection port 110 can be in communication with each other. In addition, the auxiliary passage section extends at least along the axial direction of the body 220, including: the auxiliary passage section only extends along the axial direction of the body 220, and the auxiliary passage section extends along both the axial direction and the circumferential direction of the body 220 at the same time.

[0066] By communicating the main passage section of the flow passage with the injection port 110, during the rotation of the body 220 in the base 100, the auxiliary passage section of the flow passage can be selectively communicated with the connection port 120 or the output port 130, which is more simple and convenient in operation and can reduce the operation errors of medical staff.

[0067] In some embodiments of the present disclosure, referring to Figure 11 , Figures 13 to 15 , a groove 210 is provided on the outer 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 opened on the outer peripheral wall of the body 220 cooperates with the inner peripheral wall of the base 100 to form a flow passage. That is, the main passage section of the flow passage 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 passage is arranged corresponding to the injection port 110 along the axial direction of the base 100. The auxiliary passage section of the flow passage 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 passage extends along the axial direction of the body 220 and communicates with the main passage section.

[0068] During the rotation of the body 220 of the reversing knob 200 within 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 does not change. At the same time, in the axial direction of the base 100, the injection port 110 is arranged offset from the connection port 120 and the output port 130. During the rotation of the body 220, the main passage section of the flow channel communicates with the injection port 110. When the body 220 rotates to the first position, the auxiliary passage section of the flow channel communicates with the connection port 120. At this time, the injection port 110 and the connection port 120 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 port 130. At this time, the injection port 110 and the output port 130 can be connected through the flow channel, and the injection device 20 and the conveying device 40 can be connected.

[0069] 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 communicate with each other. 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 communicating 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.

[0070] For example, referring to Figure 11 and Figure 13 , the first section 211 of the groove 210 extends circumferentially on the outer peripheral wall of the body 220. The second section 212 of the groove 210 is connected to the end position of the first section 211 and is perpendicularly arranged with respect to the first section 211. After the body 220 is accommodated 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. 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.

[0071] In some other embodiments of the present disclosure, the auxiliary passage section of the flow passage communicates with the middle part of the main passage section, and the auxiliary passage section and the main passage section are arranged perpendicular to each other. In this way, the liquid can also be decelerated at 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 passage to the auxiliary passage section of the flow passage, 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 excessive operating force of the medical staff on the injection device 20, resulting in too fast a flow rate of the liquid into the human body, thereby causing damage to the human body. For example, the main passage section of the flow passage extends along the circumferential direction of the body 220, and the auxiliary passage section of the flow passage extends along the axial direction of the body 220, so that the overall shape of the flow passage is similar to a "T" shape. When the body 220 rotates in the base 100, the main passage section of the flow passage is always in communication with the injection port 110, and the auxiliary passage section of the flow passage selectively communicates with the connection port 120 or the output port 130.

[0072] In some other embodiments of the present disclosure, the auxiliary passage section of the flow passage includes an arc structure, and the auxiliary passage section is smoothly connected to the main passage section through the arc structure. The meaning of smooth transition connection is that the main passage section and the auxiliary passage section are tangent to each other at the connected part, or at the connected part of the main passage section and the auxiliary passage section, the included angle between the two is less than 5 degrees. This shape setting of the flow passage can make the liquid flow more smoothly and faster. For example, the main passage section of the flow passage extends along the circumferential direction of the body 220, and one end of the auxiliary passage of the flow passage is connected to the end of the main passage section and is smoothly connected to the end of the main passage section. At this time, the auxiliary passage section of the flow passage extends along both the axial direction and the circumferential direction of the body 220. When the body 220 rotates in the base 100, the main passage section of the flow passage is always in communication with the injection port 110, and the auxiliary passage section of the flow passage selectively communicates with the connection port 120 or the output port 130. In practical applications, medical staff can selectively choose flow passages of different shapes according to the actual needs of patients.

[0073] 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 to a first position or a second position within the base 100. By accommodating the body 220 within the base 100, a flow channel is formed by the cooperation of the groove 210 on the outer peripheral wall of the body 220 and the inner peripheral wall of the base 100, and the screwing portion 230 is located outside the base 100. In a specific operation, medical staff can apply a rotational force to the screwing portion 230 to drive the body 220 to rotate circumferentially within the base 100. Compared with directly operating the body 220 to rotate circumferentially within the base 100, this method is simpler and more convenient. For example, referring to Figure 11 , a continuous convex structure is circumferentially provided on the outer peripheral wall of the screwing portion 230. When medical staff act on the screwing portion 230 by hand-twisting, the frictional force is greater, making it more convenient to rotate the reversing knob 200.

[0074] In some other embodiments of the present disclosure, the radial dimension of the screwing portion 230 is greater than the radial dimension of the body 220. The end portion of the base 100 includes an opening structure, and the body 220 is accommodated within 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 body 220 can be completely accommodated within 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 10 is more compact, and the liquid delivery process is also more stable. For example, the screwing portion 230 and the body 220 are coaxially arranged, that is, the central axes of the screwing portion 230 and the body 220 coincide with each other. The body 220 is accommodated within the base 100 by passing through the end portion of the base 100. At this time, since the radial dimension of the screwing portion 230 is greater than the radial dimension of the body 220, the screwing portion 230 can abut against the end portion of the base 100.

[0075] For example, 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 screwing body 231 is connected to the fixed wall 232.

[0076] Referring to Figure 12 and Figure 13 , along the axial direction of the body 220, a receiving space 234 is formed between the portion of the body 220 corresponding to the fixed wall 232 and the fixed wall 232, and the end portion of the base 100 is accommodated within the receiving space. Taking Figure 12 as a reference, the axial direction of the body 220 is the up and down direction.

[0077] In an actual design, the size of the accommodating 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 inserted into the accommodating space 234, better restricting the degrees of freedom of the reversing knob 200 relative to the base 100 other than the rotational direction, and increasing the stability and reliability of the entire device during use.

[0078] For example, when the body 220 of the reversing knob 200 is accommodated in the base 100, the screwing body 231 of the screwing portion 230 abuts against the end portion of the base 100. Since the radial dimension of the screwing body 231 is greater than the radial dimension of the end portion of the base 100, the screwing body 231 can completely cover and abut against the end portion 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 portion of the base 100, the fixed wall 232 is located outside the end portion 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: the portion corresponding to extending L length along the axial direction from the end where the body 220 is connected to the screwing body 231 towards the other end of the body 220. An annular accommodating 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 portion of the base 100, and the end portion of the base 100 can be accommodated in the accommodating space 234, thereby restricting the degrees of freedom of the reversing knob 200 relative to the base 100 other than the rotational direction.

[0079] For example, refer to Figures 13 to 17 , a limiting member is provided on the outer wall surface of the base 100. The limiting member includes a first limiting portion 141 and a second limiting portion 142, and a protruding portion 233 is provided on the screwing portion 230. In response to the screwing portion 230 rotating in the first direction, the protruding portion 233 is limited by the first limiting portion 141 to restrict the screwing portion 230 from continuing to rotate in the first direction, and the screwing portion drives the body to be located at the first position in the base; in response to the screwing portion 230 rotating in the second direction, the protruding portion 233 is limited by the second limiting portion 142 to restrict the screwing portion 230 from continuing to rotate in the second direction, and the screwing portion drives the body to be located at the second position in the base.

[0080] In actual design, the setting positions of the first limiting portion 141 and the second limiting portion 142 can be adjusted according to specific needs, so as to limit the rotation range of the commutation knob 200. By setting such a physical limiting structure, it is more convenient for medical staff to operate. They only need to rotate the commutation knob 200 along a specific direction until the convex portion 233 of the screwing portion 230 is limited by the first limiting portion 141 or the second limiting portion 142. The state that the commutation knob 200 cannot rotate any further indicates that the body 220 of the commutation knob 200 is in the first position or the second position, and at the same time, it also indicates that the corresponding port has been connected, without the need for medical staff to observe carefully.

[0081] For example, referring to Figure 5 and Figure 7 , on the outer peripheral wall of the base 100, the injection port 110 and the output port 130 are oppositely arranged, and the connection port 120 is located between the injection port 110 and the output port 130 in the circumferential direction of the base 100. When the body 220 of the commutation knob 200 rotates in the base 100, the auxiliary connection section of the flow channel can be selectively connected to the connection port 120 or the output port 130 as the body 220 rotates. At this time, if it is necessary to ensure that the main connection section of the flow channel is always connected to the injection port 110, the body 220 only needs to rotate 180 degrees inside the base 100. Therefore, referring to Figure 16 and Figure 17 , the first limiting portion 141 and the second limiting portion 142 are oppositely arranged on the outer wall surface of the base 100, that is, the screwing portion 230 rotates from the position of the first limiting portion 141 to the position of the second limiting portion 142, and the rotation angle is 180 degrees. When the screwing portion 230 is in the position of the first limiting portion 141, the convex portion 233 of the screwing portion 230 is limited by the first limiting portion 141, and at this time, the screwing portion 230 cannot rotate along the first direction anymore. When the screwing portion 230 is in the position of the second limiting portion 142, the convex portion 233 of the screwing portion 230 is limited by the second limiting portion 142, and at this time, the screwing portion 230 cannot rotate along the second direction anymore.

[0082] In some embodiments of the present disclosure, referring to Figure 15 , Figure 16 and Figure 17 , the limiting member is a circumferentially extending annular protrusion 140. The two ends of the annular protrusion 140 are respectively the first limiting portion 141 and the second limiting portion 142. The screwing portion 230 of the commutation knob 200 is provided with a convex portion 233. When the screwing portion 230 of the commutation knob 200 abuts against the end of the base 100 and rotates, the convex portion 233 can be limited by the first limiting portion 141 and the second limiting portion 142, so as to limit the rotation of the commutation knob 200 relative to the base 100.

[0083] For example, referring to Figure 16 , when the screwing portion 230 of the reversing knob 200 rotates in the first direction, i.e., the clockwise direction in the figure, the convex portion 233 of the screwing portion 230 can be limited by the first limiting portion 141. That is, when the convex portion 233 reaches the position of the first limiting portion 141, the screwing portion 230 can no longer rotate clockwise; when the convex portion 233 is limited by the first limiting portion 141, the corresponding reversing knob 200 is rotated to the first position. At this time, the flow channel connects the injection port 110 and the connection port 120, and the injection device 20 is connected to the accommodating device 30.

[0084] For another example, referring to Figure 17 , when the screwing portion 230 rotates in the second direction, i.e., the counterclockwise direction in the figure, the convex portion 233 of the screwing portion 230 can be limited by the second limiting portion 142. That is, when the convex portion 233 reaches the position of the second limiting portion 142, the screwing portion 230 can no longer rotate counterclockwise. When the convex portion 233 is limited by the second limiting portion 142, the corresponding reversing knob 200 is rotated to the second position. At this time, the flow channel connects the injection port 110 and the output port 130, and the injection device 20 is connected to the conveying device 40.

[0085] As described above, the liquid conveying device 10 includes a fixing member 300, and the fixing member 300 passes through the reversing knob 200 and limits the axial movement of the reversing knob 200 relative to the base 100. Taking Figure 10 as a reference, the axial movement is the up and down movement.

[0086] For example, in some embodiments of the present disclosure, the fixing member 300 includes a cover plate 310 and a connecting portion 320 that are connected to each other. Referring to Figures 7 to 10, the connecting portion 320 passes through the reversing knob 200 and is fixedly connected to the base 100, and the cover plate 310 is attached to the reversing knob 200. After the body 220 of the reversing knob 200 is placed inside the base 100, the connecting portion 320 passes through the reversing knob 200 and is fixedly connected to the base 100, and the cover plate 310 is attached to the reversing knob 200. That is, the reversing knob 200 is axially fixed inside the base 100 by the fixing member 300, thereby realizing the axial limit of the reversing knob 200, avoiding the axial movement of the body 220 of the reversing knob 200 while rotating inside the base 100, and further preventing the reversing knob 200 from detaching from the base 100, improving the stability and reliability of the liquid delivery device 10 during use. Among them, the cover plate 310 being attached to the reversing knob 200 means that the cover plate 310 is in contact with the surface of the reversing knob 200 to perform axial limit on the reversing knob 200, but does not affect the rotation of the reversing knob 200 relative to the base 100. For example, an obvious situation that can be excluded is that the end of the fixing member 300 tightly abuts against the reversing knob 200, resulting in the reversing knob 200 being unable to rotate relative to the base 100.

[0087] In some embodiments of the present disclosure, the reversing knob 200 is provided with a recessed portion 240, and the cover plate 310 is received in the recessed portion 240 and attached to the bottom surface of the recessed portion 240. Through this kind of matching setting, the cover plate 310 of the fixing member 300 can be hidden. On the one hand, it will not affect the screwing of the reversing knob 200, and on the other hand, the structure of the whole device is made more compact and stable.

[0088] Reference Figure 11 、 Figure 12 、 Figure 14 And Figure 15 As shown in, for example, the overall shape of the cover plate 310 is a flat annular structure. A recessed portion 240 is provided on the surface of the reversing knob 200. The depth dimension of the recessed portion 240 is correspondingly set with the thickness dimension of the cover plate 310. The cover plate 310 is received in the recessed portion 240 and attached to the bottom surface of the recessed portion 240. When the reversing knob 200 rotates, the cover plate 310 can be fixed in the recessed portion 240, and only axially limit the reversing knob 200, without affecting the rotation of the reversing knob 200 relative to the base 100.

[0089] Reference Figure 4 、 Figure 5 And Figure 6 , a guiding column 150 is provided inside the base 100, and the guiding column 150 is arranged along the axial direction of the base 100. Reference Figure 10 , one end of the connecting portion 320 away from the cover plate 310 includes an opening structure. In response to the connecting portion 320 passing through the reversing knob 200, the guiding column 150 passes through the inside of the connecting portion 320 through the opening structure.

[0090] By providing the guide posts 150, on the one hand, it can guide the insertion of the fixing member 300, making the connection of the fixing member 300 more convenient; on the other hand, it can also make the structure of the whole device more compact at the bottom surface position of the base 100. While ensuring that the body 220 of the reversing knob 200 rotates inside the base 100, it further restricts relative movement between various components, ensuring the stability of the whole device during use.

[0091] In some embodiments of the present disclosure, the guide posts 150 are provided on the bottom surface of the base 100 and extend along the axial direction of the base 100 inside the base 100. A through hole is axially formed inside the reversing knob 200. When the body 220 of the reversing knob 200 is inserted into the base 100, the guide posts 150 inside the base 100 are received in the through hole of the reversing knob 200. At the same time, one end of the connecting portion 320 of the fixing member 300 away from the cover plate 310, that is, the end of the connecting portion 320 for passing through the reversing knob 200, is an open structure. When the connecting portion 320 passes through the reversing knob 200, the guide posts 150 inside the base 100 pass through the inside of the connecting portion 320 through this open structure, so that at the bottom surface position of the base 100, from the inside to the outside are the guide posts 150, the connecting portion 320 of the fixing member 300, the body 220 of the reversing knob 200, and the outer side wall of the base 100 in sequence.

[0092] For example, referring to Figure 5 、 Figure 9 、 Figure 11 and Figure 12 , a connection hole 160 is provided in one of the bottom surface of the base 100 and the leading end of the connecting portion 320, and a connection antenna 321 is provided on the other. In response to the connecting portion 320 passing through the reversing knob 200, the connection antenna 321 is inserted into the connection hole 160 and is in interference fit with the connection hole 160. Through this connection setting, the body 220 of the reversing knob 200 is inserted into the base 100, and then the connecting portion 320 of the fixing member 300 passes through the reversing knob 200. The end of the connecting portion 320 is fixed to the base 100 by an interference fit method. 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, avoiding axial relative movement while the reversing knob 200 rotates inside the base 100, and further avoiding the reversing knob 200 detaching from the base 100.

[0093] In some embodiments of the present disclosure, the base 100 is provided with four connection holes 160 on the bottom surface. The four connection holes 160 are arranged circumferentially on the bottom surface of the base 100. The first ends of the connection parts 320 are correspondingly provided with four connection tentacles 321, and the four connection tentacles 321 are also arranged circumferentially. When the connection part 320 of the fixing member 300 passes through the reversing knob 200, each connection tentacle 321 at the end of the connection part 320 is respectively inserted into one of the connection holes 160, and an interference fit is provided between each connection tentacle 321 and the corresponding connection hole.

[0094] In summary, the liquid delivery device 10 involved in the present disclosure includes a base 100, a reversing knob 200, and a fixing member 300. The base 100 is provided with an injection port 110, a connection port 120, and an output port 130. By providing a groove 210 on the outer peripheral wall of the main body 220 in the reversing knob 200, when the main body 220 is rotatably received in the base 100, it is more convenient for the groove 210 to cooperate with the inner peripheral wall of the base 100 to form a flow channel, and at the same time, a space is left inside the reversing knob 200 for the fixing member 300 to pass through. When the fixing member 300 passes through the reversing knob 200 and restricts the axial movement of the reversing knob 200 relative to the base 100, the main body 220 of the reversing knob 200 can only rotate inside the base 100, thereby preventing the reversing knob 200 from detaching from the base 100.

[0095] The main body 220 of the reversing knob 200 can be rotated to a first position and a second position inside the base 100. When the main body 220 rotates to the first position, the flow channel connects the injection port 110 and the connection port 120. When the main body 220 rotates to the second position, the flow channel connects the injection port 110 and the output port 130. At the same time, in the present disclosure, by providing the groove 210 on the outer peripheral wall of the main body 220 and 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 restrict the axial movement of the reversing knob 200 relative to the base 100, it is possible to preferably ensure that the main body 220 accurately switches between the first position and the second position inside the base 100, and prevent the flow channel from being axially misaligned with the corresponding port, resulting in the flow channel being unable to connect the corresponding port when the main body 220 rotates inside the base 100, thereby improving the stability and reliability of the entire liquid delivery device 10 during use.

[0096] It should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This narrative manner 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.

[0097] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present disclosure, and they are not intended to limit the protection scope of the present disclosure. Any equivalent implementation manners or modifications made without departing from the technical spirit of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A liquid delivery device, characterized in that: It comprises a base, a reversing knob and a fixing piece, wherein the base is provided with an injection port, a connection port and an output port; The body of the reversing knob is rotatably accommodated in the base, the outer wall of the body is provided with a groove, and the groove cooperates with the inner wall of the base to form a flow channel; the fixing member is provided through the reversing knob and limits the axial movement of the reversing knob relative to the base; 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 port with the connection port. In response to the body rotating to the second position, the flow channel connects the injection port with the output port.

2. The liquid delivery device according to claim 1, characterized in that: The injection port, the connection port and the output port are all arranged on the side wall of the base, and the injection port, the connection port and the output port are staggered along the axial direction of the base; 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 port along the axial direction of the base, the main passage section and the injection port are communicated with each other, or in response to the rotation of the body, the main passage section and the injection port 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 connection port. In response to the body rotating to the second position, the auxiliary passage section is connected to the output port.

3. The liquid delivery device according to claim 2, characterized in that: The auxiliary passage section and the main passage section are arranged perpendicular to each other.

4. The liquid delivery device according to claim 2, characterized in that: The auxiliary passage section comprises an arc-shaped structure, and the auxiliary passage section is smoothly connected with the main passage section through the arc-shaped structure.

5. 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.

6. The liquid delivery device according to claim 5, 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.

7. The liquid delivery device according to claim 5, 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.

8. The liquid delivery device according to claim 5, characterized in that: The outer wall surface of the base is provided with a limiting member, the limiting member includes a first limiting portion and a second limiting portion, and the screwing portion is provided with a protrusion; In response to the screwing portion rotating in the first direction, the protrusion is limited by the first limiting portion to limit the screwing portion from continuing to rotate in the first direction, and the screwing portion drives the body to be located in the first position in the base; In response to the screwing portion rotating in the second direction, the protrusion is limited by the second limiting portion to restrict the screwing portion from continuing to rotate in the second direction, and the screwing portion drives the body to be located in the second position in the base.

9. The liquid delivery device according to claim 8, characterized in that: The limiting member is an annular protrusion extending circumferentially on the outer wall surface of the base, and the two ends of the annular protrusion are the first limiting portion and the second limiting portion respectively.

10. The liquid delivery device according to claim 1, characterized in that: The fixing member comprises a cover plate and a connecting portion which are connected to each other. The connecting portion is passed through the reversing knob and is fixedly connected to the base. The cover plate is attached to the reversing knob.

11. The liquid delivery device according to claim 10, characterized in that: The reversing knob is provided with a recessed portion, and the cover plate is accommodated in the recessed portion and is attached to the bottom surface of the recessed portion.

12. The liquid delivery device according to claim 10, characterized in that: A guide column is arranged inside the base, and the guide column is arranged along the axial direction of the base. The end of the connecting part away from the cover plate includes an opening structure; in response to the connecting part passing through the reversing knob, the guide column passes through the opening structure and is arranged inside the connecting part.

13. The liquid delivery device according to claim 10, characterized in that: One of the bottom surface of the base and the head end of the connecting part is provided with a connecting hole, and the other is provided with a connecting contact angle. In response to the connecting part passing through the reversing knob, the connecting contact angle is inserted into the connecting hole and has an interference fit with the connecting hole.

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

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