A powder injection device

Abstract

The utility model relates to medical instrument technical field, concretely is a kind of powder injection device, including connector main body, one powder flow passage is set up in connector main body inside along longitudinal direction, the proximal end of catheter is fixedly connected in the first end of connector main body, and the other end opposite with the first end of connector main body is equipped as second end, protective tube sleeve is equipped in the proximal end periphery of catheter, protective head is equipped in the proximal end periphery of protective tube, and with the first end of connector main body fixed connection, screw mouth is fixedly connected in the top of connector main body, the inner cavity of screw mouth is communicated with the upper end of powder flow passage, valve core is installed in the side wall of connector main body, at least two different aperture passageways are set up in the inside of valve core, filter membrane is arranged in the inside of connector main body and is located in powder flow passage, connector is fixedly connected in the second end of connector main body, wherein, catheter, connector main body and filter membrane are integrated into one-piece structure, constitute the powder injection device of just taking and using.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a powder injection device. Background Technology

[0002] In medical procedures such as endoscopic surgery, it is often necessary to deliver powdered drugs to the target site using an injection device.

[0003] Currently, the powder injection devices commonly used in endoscopic surgery typically consist of multiple independent components, including filters, catheters, and the main body. Before use, operators must assemble these disparate components on-site. This process not only increases the number of steps and preparation time but also introduces inconvenience and contamination risks in emergency or strictly aseptic surgical environments, failing to meet the clinical need for "ready-to-use." Furthermore, the connection between the catheter and the main body in existing devices is structurally weak, lacking effective reinforcement and cushioning design. During surgery, the catheter often needs to bend to reach specific locations; this junction area is prone to collapse, kinking, or even breakage under repeated or excessive bending, leading to interruption of powder delivery, affecting the surgical process, and posing potential safety hazards. Simultaneously, the functions of existing devices in the powder dispensing stage are relatively limited, mostly lacking flow rate adjustment capabilities or employing crude adjustment methods. The powder dispensing flow rate cannot be precisely and conveniently controlled according to the actual needs of different stages of the surgery. This may lead to uneven powder distribution, improper dosage, or excessively fast flow rate causing powder to diffuse in the cavity, affecting the clarity of the surgical field and ultimately affecting the treatment effect.

[0004] Existing powder injection devices mainly suffer from three major technical problems that urgently need to be solved: they require assembly before operation, the guide tubes are easily bent and damaged, and the powder flow rate is uncontrollable. Therefore, a powder injection device is proposed that solves the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a powder injection device. Through the design of at least two passages with different diameters inside the valve core, rotating the valve core allows the powder to flow through channels of different diameters. The device can select the first, second, and third channels according to the needs of the surgery. This adjustable, staged flow rate control overcomes the shortcomings of traditional devices with their single and uncontrollable flow rate, making surgical operations more flexible and precise. The integration of the catheter, connector body, and filter membrane into a single structure allows the device to be used immediately. The protective tube and protective head together form a bend-resistant protective structure, providing transitional protection during bending.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A powder injection device, characterized in that it comprises: The connector body has a powder flow channel formed longitudinally inside the connector body; The catheter has its proximal end fixedly connected to the first end of the connector body, and the other end opposite to the first end of the connector body is designated as the second end. A protective tube is sleeved around the proximal end of the conduit; A protective head is fitted around the proximal end of the protective tube and is fixedly connected to the first end of the connector body. The protective tube and the protective head together form an anti-bending protection structure for the proximal end of the catheter. A screw thread is fixedly connected to the top of the connector body for assembling a powder bottle, and the inner cavity of the screw thread is connected to the upper end of the powder flow channel. The valve core is installed on the side wall of the connector body. The valve core has at least two passages with different apertures inside. By rotating the valve core, one of its passages can be selectively connected to the powder flow channel to control the powder flow rate. A filter membrane is disposed inside the second end of the connector body; A connector is fixedly connected to the second end of the connector body, and the connector is used to fix the filter membrane in the powder flow channel; The conduit, connector body and filter membrane are integrated into a single structure, forming a ready-to-use powder injection device.

[0007] Preferably, a snap-fit ​​block is provided at the first end of the connector body, and the proximal end of the conduit is sleeved on the snap-fit ​​block; the protective head is fixedly connected to the connector body.

[0008] Preferably, a first snap-fit ​​groove is provided on one side of the peripheral wall between the first end and the second end of the connector body. The valve core has three passages inside, including a first passage, a second passage and a third passage. One end of the valve core is provided with a rotating handle. The end of the valve core opposite to the rotating handle is provided with a second snap-fit ​​buckle. A compression gasket is provided between the second snap-fit ​​buckle and the connector body. The end of the valve core near the rotating handle is provided with a protrusion. The valve core is installed on the connector body by engaging with the first snap-fit ​​groove through the protrusion.

[0009] Preferably, a first snap-fit ​​is provided on the top outer periphery of the connector body, and a fifth snap-fit ​​groove is correspondingly provided on the bottom of the outer wall protrusion of the screw opening. The screw opening is fixed to the connector body by engaging with the first snap-fit ​​through the fifth snap-fit ​​groove. A first sealing ring is pressed between the bottom of the screw opening and the top of the connector body.

[0010] Preferably, the second end of the connector body is provided with a placement groove for accommodating the filter membrane, and a second snap-fit ​​groove is provided around the placement groove. The connector head is provided with a third snap-fit ​​buckle. The third snap-fit ​​buckle is connected to the snap-fit ​​groove of the second snap-fit ​​groove to fix the connector head in the connector body and press the filter membrane tightly and fix it in the placement groove.

[0011] Preferably, a membrane gasket is also provided between the filter membrane and the connector.

[0012] Preferably, a bottom cover is fixedly connected to the lower part of the connector body, and a collection groove for collecting powder is provided at the top center of the bottom cover.

[0013] Preferably, a second sealing ring is provided on the top of the bottom cover and around the periphery of the collection groove. When the bottom cover is installed on the connector body, the second sealing ring is pressed between the two. The bottom cover is connected to the third locking groove opened below the connector body by a fourth locking buckle arranged circumferentially.

[0014] Preferably, a fourth snap-fit ​​groove is provided on the other side of the peripheral wall between the first end and the second end of the connector body, and a valve cover is fixedly connected to the fourth snap-fit ​​groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The design of at least two passages with different orifice diameters inside the valve core allows the powder to flow through channels of different diameters by rotating the valve core. The first, second, and third channels can be selected according to the needs of the operation. This adjustable and staged flow rate control overcomes the defects of traditional devices with single and uncontrollable flow rates, making the surgical operation more flexible and precise.

[0016] 2. By integrating the catheter, connector body, and filter membrane into a single structure, the device can be used immediately, greatly improving surgical efficiency and avoiding the risk of contamination during assembly.

[0017] 3. The protective tube and protective head together form an anti-bending protection structure, which provides transitional protection for the weakest point of the catheter proximal end, where bending is most likely to occur, during the bending process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the overall structure of this utility model; Figure 3 This utility model Figure 2 Enlarged views of parts A, B, and C in the diagram; Figure 4This is a schematic diagram of the first card slot, the first card buckle, and the fifth card slot of this utility model; Figure 5 This is a partial longitudinal sectional view of the connector body of this utility model, and a schematic diagram of the collecting groove and the fourth snap fastener; Figure 6 This is a longitudinal sectional view of the connector body of this utility model; Figure 7 This is a schematic diagram of the valve core and valve cover of this utility model; Figure 8 This is a schematic diagram of the powder flow channel and three channels of this utility model.

[0019] In the diagram: 1. Connector body; 11. Powder flow channel; 12. Snap-fit ​​block; 13. First snap-fit ​​groove; 14. First snap-fit ​​buckle; 15. Placement groove; 151. Second snap-fit ​​groove; 16. Third snap-fit ​​groove; 17. Fourth snap-fit ​​groove; 2. Guide tube; 3. Protective tube; 4. Protective head; 5. Threaded joint; 51. Fifth snap-fit ​​groove; 52. First sealing ring; 53. Thread; 6. Valve core; 61. First passage; 62. Second passage; 63. Third passage; 64. Second snap-fit ​​buckle; 65. Compression gasket; 66. Protrusion; 7. Filter membrane; 71. Membrane gasket; 8. Connector head; 81. Third snap-fit ​​buckle; 9. Bottom cover; 91. Collection groove; 92. Second sealing ring; 93. Fourth snap-fit ​​buckle; 10. Valve cover; 101. Fifth snap-fit ​​buckle. Detailed Implementation

[0020] The technical solutions of the present utility model will now be described with reference to the accompanying drawings of the embodiments. The embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that all directional indicators in this application embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. In this embodiment, the proximal end is the end closer to the surgeon, and the distal end is the end farther away from the surgeon.

[0022] Please see Figures 1 to 8 This utility model provides a powder injection device, the technical solution of which is as follows: The connector body 1 has a powder flow channel 11 longitudinally formed inside it. The connector body 1 serves as the core structural frame and support of the entire device, and the longitudinal powder flow channel 11 inside it constitutes the core channel for the powder to flow from the inlet to the outlet.

[0023] The catheter 2 is fixedly connected to the first end of the connector body 1 at its proximal end, and the other end opposite to the first end of the connector body 1 is designated as the second end. As the final powder output component, the fixed connection between the proximal end of the catheter 2 and the connector body 1 ensures that the powder can be accurately guided from inside the device to the target location inside the patient's body.

[0024] The protective tube 3 is sleeved around the proximal end of the conduit 2. As the first reinforcing structure, the protective tube 3 is sleeved around the proximal end of the conduit 2, which can effectively increase the local rigidity and compressive strength of the weak area, prevent the conduit 2 from being crushed when subjected to radial compression, and initially ensure the smooth flow of powder.

[0025] The protective head 4 is fitted around the proximal end of the protective tube 3 and is fixedly connected to the first end of the connector body 1. The protective tube 3 and the protective head 4 together form a bend-resistant protective structure for the proximal end of the catheter 2. The protective head 4 is firmly connected to the connector body 1 and cooperates with the internal protective tube 3 to form a rigid bend-resistant protective structure. This structure can significantly disperse and offset the stress generated when the proximal end of the catheter 2 is repeatedly bent and pulled during surgery, fundamentally avoiding powder delivery interruption caused by bending at the connection between the catheter 2 and the body, and greatly improving the reliability and durability of the device in complex surgical environments.

[0026] A screw thread 5 is fixedly connected to the top of the connector body 1 and is used to assemble powder bottles. The inner cavity of the screw thread 5 communicates with the upper end of the powder flow channel 11. The design of the screw thread 5 allows this device to quickly and easily assemble universal powder bottles. The communication between its inner cavity and the upper end of the powder flow channel 11 constitutes the "inlet" of the powder injection device, ensuring that powder can smoothly enter the internal flow channel of the device from the powder bottle.

[0027] The valve core 6 is mounted on the side wall of the connector body 1. The valve core 6 has at least two passages with different orifice diameters inside. By rotating the valve core 6, one of these passages can selectively connect with the powder flow channel 11, thereby controlling the powder flow rate; this is the core of achieving precise flow rate control. By rotating the valve core 6, the operator can select which passages the powder should flow through. Larger orifice passages allow the powder to pass through quickly, while smaller orifice passages limit the powder flow. This selectable, phased flow rate control mechanism allows the surgeon to flexibly and precisely control the powder spraying speed according to the actual situation during surgery, achieving an operational precision that cannot be achieved by single-flow rate devices in existing technologies.

[0028] The filter membrane 7 is disposed inside the second end of the connector body 1 and is used to filter particulate impurities in the airflow provided by the air source to ensure the cleanliness of the airflow.

[0029] A connector 8 is fixedly connected to the second end of the connector body 1. One end of the connector 8 is fixedly connected to the second end of the connector body 1, and the other end is fixedly connected to an air source. The connector 8 and the connector body 1 can be connected in various ways, such as threaded connection or snap-fit ​​connection, ensuring both the rigidity of the protective structure and facilitating initial installation or subsequent replacement of the connector 8, thus balancing production efficiency and maintenance convenience. The connector 8 is used to fix the filter membrane 7 within the powder flow channel 11. The connector 8 is not only an airflow inlet, but its more crucial function is to structurally press and fix the filter membrane 7 firmly in a preset working position through its fixed connection with the second end of the connector body 1. This design ensures that the filter membrane 7 will not shift or loosen under powder flow pressure, while also facilitating disassembly when necessary.

[0030] The catheter 2, connector body 1, and filter membrane 7 are integrated into a single structure, forming a ready-to-use powder injection device. This completely eliminates the cumbersome and time-consuming process of temporarily assembling multiple components before surgery, as well as the potential risks of sealing failure and microbial contamination due to multiple assembly interfaces. Reference Figures 1 to 3 The connector body 1 has a snap-fit ​​block 12 at its first end, and the proximal end of the conduit 2 is fitted onto the snap-fit ​​block 12; the protective head 4 is fixedly connected to the first end of the connector body 1. The snap-fit ​​block 12 provides a simple and reliable way to fix the conduit 2, ensuring the firmness of the connection. Meanwhile, the protective head 4 can be connected using various fixing methods, such as threaded connection or snap-fit ​​connection, which ensures the rigidity of the protective structure while providing convenience for the initial installation or subsequent replacement of the conduit 2, thus balancing production efficiency and maintenance convenience.

[0031] Reference Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8A first snap-fit ​​groove 13 is provided on one side of the peripheral wall between the first and second ends of the connector body 1. The valve core 6 has three internal passages: a first passage 61, a second passage 62, and a third passage 63. A rotating handle is provided at one end of the valve core 6, and a second snap-fit ​​buckle 64 is provided at the end of the valve core 6 opposite the rotating handle. A compression gasket 65 is provided between the second snap-fit ​​buckle 64 and the connector body 1. A protrusion 66 is provided at the end of the valve core 6 near the rotating handle. The valve core 6 is installed on the connector body 1 by the snap-fit ​​engagement of the protrusion 66 with the first snap-fit ​​groove 13. The three passages provide precise control at three speeds: high speed, medium speed, and low speed. The engagement of the protrusion 66 with the first snap-fit ​​groove 13 ensures reliable installation and rotation axis positioning of the valve core 6. The combination of the second snap-fit ​​buckle 64 and the compression gasket 65 ensures a microscopic seal between the valve core 6 and the connector body 1, effectively preventing powder leakage in non-working passages and solving common leakage and jamming problems in powder handling devices.

[0032] Reference Figure 1 , Figure 2 and Figure 4 The connector body 1 has a first snap-fit ​​buckle 14 on its top outer periphery, and a fifth snap-fit ​​groove 51 is correspondingly formed on the bottom of the protruding block on the outer wall of the screw opening 5. The screw opening 5 is fixed to the connector body 1 by engaging with the first snap-fit ​​buckle 14 through the fifth snap-fit ​​groove 51. A first sealing ring 52 is pressed between the bottom of the screw opening 5 and the top of the connector body 1. The snap-fit ​​connection method makes the installation of the screw opening 5 quick and convenient, without rotation, thus improving assembly efficiency. The pressed-fit first sealing ring 52 forms a reliable static sealing barrier between the screw opening 5 and the body, completely preventing powder leakage from the interface at the top of the device and ensuring the sealing integrity of the device.

[0033] Reference Figure 2 , Figure 3 , Figure 4 and Figure 7 The connector body 1 has a placement groove 15 for accommodating the filter membrane 7 inside its second end. A second snap-fit ​​groove 151 is formed around the placement groove 15. The connector head 8 is provided with a third snap-fit ​​buckle 81. The third snap-fit ​​buckle 81 engages with the second snap-fit ​​groove 151 to fix the connector head 8 inside the connector body 1 and press the filter membrane 7 firmly into the placement groove 15. The placement groove 15 provides precise positioning and accommodating space for the filter membrane 7. The cooperation between the fifth snap-fit ​​buckle 101 and the fourth snap-fit ​​groove 17 on the connector head 8 enables rapid and secure fixing of the filter membrane 7, ensuring its stability during operation.

[0034] Reference Figure 3A membrane gasket 71 is also provided between the filter membrane 7 and the connector 8. The membrane gasket 71 is usually made of a material with good elasticity. Its functions are twofold: first, to buffer and disperse the clamping force of the connector 8 on the filter membrane 7, preventing the brittle filter membrane 7 from being crushed; and second, to fill the microscopic gaps between the filter membrane 7 and the connector 8, forming an auxiliary seal to prevent powder from leaking from the edges without being filtered by the filter membrane 7, further improving the sealing reliability of the filter assembly.

[0035] Reference Figure 4 and Figure 5 A bottom cover 9 is fixedly connected to the lower part of the connector body 1. A collection groove 91 for collecting powder is provided at the top center of the bottom cover 9. The bottom cover 9 can be connected by a variety of fixing methods, such as threaded connection or snap-fit ​​connection, which not only ensures the rigidity of the protective structure, but also provides convenience for the initial installation or subsequent replacement of the bottom cover 9. The bottom cover 9 and its collection groove 91 provide an integrated powder collection mechanism. The function of the collection groove is to collect the powder falling from the top of the channel when the device is in use, and gather the powder together to facilitate airflow transportation.

[0036] Reference Figure 3 and Figure 5 A second sealing ring 92 is provided on the top of the bottom cover 9 and around the periphery of the collection groove 91. When the bottom cover 9 is installed on the connector body 1, the second sealing ring 92 is pressed between the two. The bottom cover 9 is snapped together with the third snap-fit ​​groove 16 opened below the connector body 1 via a fourth snap-fit ​​93 arranged circumferentially. The second sealing ring 92 ensures a reliable seal between the bottom cover 9 and the connector body 1, preventing the collected powder from leaking out, and also preventing external contaminants from entering the device. The snap-fit ​​connection method also ensures the ease of assembly of the bottom cover 9.

[0037] Reference Figure 5 and Figure 6 A fourth snap-fit ​​groove 17 is also provided on the other side of the peripheral wall between the first and second ends of the connector body 1. A valve cover 10 is fixedly connected to the fourth snap-fit ​​groove 17. The valve cover 10 can be connected in various ways, such as threaded connection or snap-fit ​​connection, which ensures the rigidity of the protective structure and provides convenience for the initial installation or subsequent replacement of the valve cover 10. The valve cover 10 seals the mounting port of the valve core 6 on the other side of the connector body 1, serving to prevent dust and foreign objects from entering and protecting the internal structure of the valve core 6, further improving the overall integrity and safety of the device.

[0038] Working principle: During use, the operator first screws the powder bottle onto the screw cap 5, connects the connector 8 to the air source, and rotates the handle of the valve core 6 according to the needs of the surgery, so that its internal first passage 61, second passage 62 and third passage 63 can be aligned with the powder flow channel 11 in the connector body 1 respectively. The powder falls and flows sequentially through the inner cavity of the screw cap 5, the upper end of the powder flow channel 11, the selected passage of the valve core 6, and the lower end of the powder flow channel 11, and is collected by the collection tank 91. The airflow provided by the air source connected to the connector 8 is filtered by the filter membrane 7, blowing the powder collected by the collection tank 91, and finally accurately delivered to the target site in the patient's body through the catheter 2. Throughout the process, the protective tube 3 and the protective head 4 work together to prevent the proximal end of the catheter 2 from bending, ensuring unobstructed flow. The integrated structure of the device allows for immediate use, and the multi-path selection of the valve core 6 enables reliable and precise control of the powder flow rate.

[0039] Embodiments of the present invention have been shown and described. Those skilled in the art will be able to make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder injection device, characterized in that, include: Connector body (1), wherein a powder flow channel (11) is provided longitudinally inside the connector body (1); The catheter (2) is fixedly connected to the first end of the connector body (1) at its proximal end, and the other end opposite to the first end of the connector body (1) is designated as the second end. A protective tube (3) is sleeved around the proximal end of the conduit (2); The protective head (4) is sleeved around the proximal end of the protective tube (3) and fixedly connected to the first end of the connector body (1). The protective tube (3) and the protective head (4) together form a bend-proof protection structure for the proximal end of the conduit (2). The screw (5) is fixedly connected to the top of the connector body (1) for assembling powder bottles. The inner cavity of the screw (5) is connected to the upper end of the powder flow channel (11). The valve core (6) is installed on the side wall of the connector body (1). The valve core (6) has at least two passages with different apertures inside. By rotating the valve core (6), one of its passages can be selectively connected to the powder flow channel (11) to achieve control of the powder flow rate. A filter membrane (7) is disposed inside the second end of the connector body (1); Connector (8), the connector (8) is fixedly connected to the second end of the connector body (1), the connector (8) is used to fix the filter membrane (7) in the powder flow channel (11); The conduit (2), connector body (1) and filter membrane (7) are integrated into a single structure to form a ready-to-use powder injection device.

2. The powder injection device according to claim 1, characterized in that: The connector body (1) has a snap-fit ​​block (12) at its first end, the proximal end of the conduit (2) is fitted onto the snap-fit ​​block (12), and the protective head (4) is fixedly connected to the connector body (1).

3. The powder injection device according to claim 1, characterized in that: A first snap-fit ​​groove (13) is provided on one side of the peripheral wall between the first end and the second end of the connector body (1). The valve core (6) has three passages inside, including a first passage (61), a second passage (62) and a third passage (63). A rotating handle is provided at one end of the valve core (6). A second snap-fit ​​buckle (64) is provided at the end of the valve core (6) opposite to the rotating handle. A compression gasket (65) is provided between the second snap-fit ​​buckle (64) and the connector body (1). A protrusion (66) is provided at the end of the valve core (6) near the rotating handle. The valve core (6) is installed on the connector body (1) by the snap-fit ​​cooperation between the protrusion (66) and the first snap-fit ​​groove (13).

4. The powder injection device according to claim 1, characterized in that: The connector body (1) is provided with a first snap fastener (14) on the top outer periphery, and the bottom of the outer wall protrusion of the screw hole (5) is provided with a fifth snap groove (51). The screw hole (5) is fixed to the connector body (1) by engaging with the first snap fastener (14) through the fifth snap groove (51). A first sealing ring (52) is pressed between the bottom of the screw hole (5) and the top of the connector body (1).

5. The powder injection device according to claim 1, characterized in that: The second end of the connector body (1) is provided with a placement groove (15) for accommodating the filter membrane (7). A second snap-fit ​​groove (151) is provided around the placement groove (15). The connector head (8) is provided with a third snap-fit ​​buckle (81). The third snap-fit ​​buckle (81) is connected to the second snap-fit ​​groove (151) to fix the connector head (8) in the connector body (1) and press the filter membrane (7) tightly in the placement groove (15).

6. The powder injection apparatus according to claim 5, characterized in that: A membrane gasket (71) is also provided between the filter membrane (7) and the connector (8).

7. The powder injection apparatus according to claim 1, characterized in that: A bottom cover (9) is fixedly connected to the lower part of the connector body (1), and a collection groove (91) for collecting powder is provided at the top center of the bottom cover (9).

8. The powder injection apparatus according to claim 7, characterized in that: A second sealing ring (92) is provided on the top of the bottom cover (9) and around the periphery of the collection groove (91). When the bottom cover (9) is installed on the connector body (1), the second sealing ring (92) is pressed between the two. The bottom cover (9) is snapped together with the third snap groove (16) opened below the connector body (1) by the fourth snap fastener (93) arranged around its periphery.

9. The powder injection apparatus according to claim 1, characterized in that: A fourth snap-fit ​​groove (17) is also provided on the other side of the peripheral wall between the first end and the second end of the connector body (1), and a valve cover (10) is fixedly connected to the fourth snap-fit ​​groove (17).

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