Variable diameter dilatation and puncture cannula device

Abstract

The utility model discloses a variable diameter expansion puncture sleeve device relates to medical instrument technical field, including air closing valve cover, the inner wall fixed mounting of spacing frame has fixed part limit component, the inner wall bottom fixed mounting of variable diameter fixed box has variable diameter part support seal component. The utility model discloses a variable diameter expansion puncture sleeve device, its by four variable diameter extension board composition's passage can make variable diameter expansion function by fixed part limit component, can adapt to a variety of different size's puncture needle. Through variable diameter part support seal component can utilize the pressure extrusion rubber sleeve of pressing plate and clamping frame, make rubber sleeve adhere to the bottom of four variable diameter extension board of support seat, not only can play the sealing effect, and play the support effect to four variable diameter extension board's expansion. And, when device production and processing, can first fix rubber sleeve in through -hole, then fix spacing frame and four variable diameter extension board, convenient to assemble, simple structure.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a variable diameter dilatation puncture cannula device. Background Technology

[0002] In surgical procedures, trocar devices are commonly used and important medical instruments, especially in minimally invasive surgery. A trocar device typically consists of a cannula assembly and a puncture needle, used to establish an artificial passage into a body cavity. The basic procedure is as follows: a small incision is made in the patient's skin to allow the cannula assembly to pass through; the puncture needle is then inserted through the cannula assembly and together they pass through the skin opening and pierce the abdominal wall into the body cavity. Once inside the body cavity, the puncture needle is removed, leaving the cannula assembly as a passage for surgical instruments to enter and exit the cavity.

[0003] Chinese patent document CN118436412A discloses a variable-diameter expansion puncture cannula device. It consists of an internal fixation bracket and an expansion variable-diameter body, with the bottom wall of the latter forming a perforation. The bottom wall of the internal fixation bracket has several grooves formed circumferentially. The variable-diameter bracket is formed by several variable-diameter plates, each including a fixing part and an expansion part. One end of a variable-diameter sleeve is fixed inside the expansion variable-diameter body, while the other end extends from the perforation to the outside of the expansion variable-diameter body and covers the periphery of the expansion parts. The expansion part of the puncture cannula device consists of several variable-diameter plates and a variable-diameter sleeve covering the outside of the variable-diameter bracket. Because the variable-diameter bracket and the variable-diameter sleeve are separate components, the puncture cannula can simultaneously provide the rigidity of the variable-diameter bracket and the flexibility of the variable-diameter sleeve, increasing the applicability of the puncture cannula device.

[0004] The existing technology has the following problems:

[0005] First, the flange of the aforementioned device is inserted into a groove, and its overall fixation is achieved through the air shut-off valve cover or the inner wall of the internal fixation bracket. When medical personnel open the air shut-off valve cover for inspection, even a slight impact can easily cause the entire variable diameter bracket to become unstable. Second, the two fixing clips are located between the fixing part and the inner wall of the expansion variable diameter body. The top fixing clip is limited by the fixing part, the toothed column, and the toothed groove, which can easily increase the difficulty of processing and assembly. Utility Model Content

[0006] This invention provides a variable diameter expansion puncture cannula device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A variable diameter expansion puncture cannula device includes an air-sealed valve cover, a variable diameter fixing box is threadedly connected to the inner wall of the air-sealed valve cover, a limit frame is movably connected to the bottom of the inner wall of the variable diameter fixing box, a fixing part limiting component is fixedly installed on the inner wall of the limit frame, and a variable diameter part support sealing component is fixedly installed on the bottom of the inner wall of the variable diameter fixing box.

[0009] The fixing and limiting assembly includes four top-opening locking frames, which are arranged in a ring around the inner wall of the limiting frame. A through hole is provided in the lower center of the variable diameter fixing box. Four variable diameter extension plates are movably sleeved on the inner wall of the through hole. The four variable diameter extension plates are formed by several variable diameter pieces extending upwards. The bottom of the four variable diameter extension plates is formed by several variable diameter pieces closing downwards to form a channel. The lower end of the top of the four variable diameter extension plates is movably connected to the inner wall of the four locking frames.

[0010] The variable diameter section support sealing assembly includes a tapered rubber sleeve located inside the through hole, with the bottom of its inner wall abutting against the bottom of the outer wall of the four variable diameter extension plates. A support seat is fixedly installed on the inner wall of the through hole, and the lower end of the top of the rubber sleeve overlaps with the upper edge of the support seat.

[0011] Preferably, two limiting plates are fixedly installed at the lower end of the top of each of the variable diameter extension plates, and two partitions with matching limiting plates are fixedly installed on the inner wall of each of the card slot frames. An annular arc-shaped card block is fixedly installed on the top of each pair of adjacent limiting plates on the side away from each other, and an annular arc-shaped card groove with matching arc-shaped card blocks is opened on the top of each pair of adjacent partitions on the opposite side.

[0012] Preferably, the top of the four variable diameter extension plates is a trumpet-shaped structure, and the four variable diameter extension plates and their bottom structure together form an expandable channel. A puncture needle is movably connected to the inner wall of the channel, and an insertion head is fixedly installed at the bottom of the channel.

[0013] Preferably, an annular plate is fixedly installed on the bottom of the inner wall of the variable diameter fixing box at the position outside the support base. A fixing groove is opened at the upper end of the annular plate, and an annular insert plate is inserted into the inner wall of the fixing groove. A conical pressure plate is fixedly installed on the top inner side of the annular insert plate. The upper end of the pressure plate abuts against the lower end of the four card slot frames, and the lower end of the pressure plate abuts against the upper edge of the rubber sleeve.

[0014] Preferably, the pressure plate has a structure in which the size gradually decreases towards the center of the through hole.

[0015] Preferably, a rubber pad is fixedly installed at the bottom of the inner wall of the fixing groove, and the upper end of the rubber pad abuts against the lower end of the annular insert plate.

[0016] Preferably, an annular limiting groove is provided at the bottom edge of the inner wall of the variable diameter fixing box, a sealing strip with a matching limiting groove is fixedly installed at the lower end of the limiting frame, an annular extrusion groove is provided at the top of the inner wall of the variable diameter fixing box, and an annular extrusion block with a matching extrusion groove is fixedly installed at the top of the outer wall of the limiting frame.

[0017] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0018] 1. This utility model provides a variable diameter expansion puncture cannula device, which enables the channel composed of four variable diameter extension plates to achieve variable diameter expansion function through the cooperation between the positioning frame, through hole, variable diameter extension plate, limiting plate, partition, arc-shaped locking block, arc-shaped locking groove, channel, puncture needle and insertion head, so as to adapt to a variety of different puncture needles and enhance the versatility of the device.

[0019] 2. This utility model provides a variable-diameter expansion puncture cannula device. Through the cooperation of the rubber sleeve, support base, annular plate, fixing groove, annular insert plate, pressure plate, and rubber pad, the pressure plate and locking frame compress the rubber sleeve, causing it to adhere to the bottom of the support base and four variable-diameter extension plates. This not only provides a sealing function but also supports the expansion of the four variable-diameter extension plates. Furthermore, during device manufacturing, the rubber sleeve can be fixed in the through hole first, followed by fixing the limiting frame and four variable-diameter extension plates, facilitating assembly and simplifying the structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall bottom view of the present invention;

[0021] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the overall exploded structure of this utility model (I);

[0023] Figure 4 This is a schematic diagram of the overall exploded structure of this utility model (II);

[0024] Figure 5 This is a partially enlarged schematic diagram of point A in this utility model;

[0025] Figure 6 This is a schematic diagram of the variable diameter extension plate assembly structure of this utility model;

[0026] Figure 7 This is a partially enlarged schematic diagram of section B of this utility model;

[0027] Figure 8 This is a schematic diagram of the variable diameter support and sealing assembly of this utility model.

[0028] In the diagram: 1. Air shut-off valve cover; 2. Fixed part limiting assembly; 3. Variable diameter part support and sealing assembly; 4. Variable diameter fixing box; 5. Limiting frame; 6. Limiting groove; 7. Seal; 8. Extrusion groove; 9. Annular extrusion block; 21. Locking frame; 22. Through hole; 23. Variable diameter extension plate; 24. Limiting plate; 25. Partition plate; 26. Arc-shaped locking block; 27. Arc-shaped locking groove; 28. Channel; 29. ​​Puncture needle; 210. Insertion head; 31. Rubber sleeve; 32. Support seat; 33. Annular plate; 34. Fixing groove; 35. Annular insert plate; 36. Pressure plate; 37. Rubber pad. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] like Figures 1-8 As shown, a variable diameter expansion puncture cannula device includes an air shut-off valve cover 1, a variable diameter fixing box 4 is threadedly connected to the inner wall of the air shut-off valve cover 1, a limit frame 5 is movably connected to the bottom of the inner wall of the variable diameter fixing box 4, a fixing part limiting component 2 is fixedly installed on the inner wall of the limit frame 5, and a variable diameter part support sealing component 3 is fixedly installed on the bottom of the inner wall of the variable diameter fixing box 4.

[0031] The fixing part limiting assembly 2 includes four top open locking frames 21. The four locking frames 21 are arranged in a ring around the inner wall of the limiting frame 5. A through hole 22 is opened through the middle of the lower end of the variable diameter fixing box 4. Four variable diameter extension plates 23 are movably sleeved on the inner wall of the through hole 22. The four variable diameter extension plates 23 are formed by a number of variable diameter pieces extending upward. The bottom of the four variable diameter extension plates 23 is formed by a number of variable diameter pieces extending downward to form a channel. The lower end of the top of the four variable diameter extension plates 23 is movably connected to the inner wall of the four locking frames 21.

[0032] The variable diameter section support sealing assembly 3 includes a tapered rubber sleeve 31, which is located inside the through hole 22 and its inner wall bottom abuts against the outer wall bottom of the four variable diameter extension plates 23. A support seat 32 is fixedly installed on the inner wall of the through hole 22, and the lower end of the top of the rubber sleeve 31 overlaps with the upper edge of the support seat 32.

[0033] The fixing and limiting assembly enables the channel 28, composed of four variable-diameter extension plates 23, to expand by changing its diameter, accommodating various sizes of puncture needles 29 and enhancing the device's versatility. The variable-diameter support and sealing assembly 3 utilizes the pressure of the pressure plate 36 and the locking frame 21 to compress the rubber sleeve 31, causing it to adhere to the support base 32 and the bottom of the four variable-diameter extension plates 23. This not only provides a seal but also supports the expansion of the four variable-diameter extension plates 23. Furthermore, during device manufacturing, the rubber sleeve 31 can be fixed inside the through hole 22 first, followed by fixing the limiting frame 5 and the four variable-diameter extension plates 23, facilitating assembly and simplifying the structure.

[0034] like Figure 4 , Figure 5 and Figure 7 As shown, two limiting plates 24 are fixedly installed at the lower end of the top of each variable diameter extension plate 23, and two partitions 25 with matching limiting plates 24 are fixedly installed on the inner wall of each locking frame 21. An annular arc-shaped locking block 26 is fixedly installed on the top of each pair of adjacent limiting plates 24 on the side away from each other, and an annular arc-shaped locking groove 27 with matching arc-shaped locking blocks 26 is opened on the top of each pair of adjacent partitions 25 on the opposite side.

[0035] When the limiting plate 24 is inserted between the two partitions 25, the arc-shaped locking block 26 will be squeezed into the arc-shaped locking groove 27, thereby limiting the corresponding variable diameter extension plate 23 and providing stable support and limiting for the puncture needle 29.

[0036] like Figure 1 and Figure 6 As shown, the top of the four variable diameter extension plates 23 is a trumpet-shaped structure. The four variable diameter extension plates 23 and their bottom structure together form an extendable channel 28. The inner wall of the channel 28 is movably connected to a puncture needle 29, and the bottom of the channel 28 is fixedly installed with an insertion head 210.

[0037] The flared structure facilitates the insertion of the puncture needle 29 into the channel, the extendable channel can accommodate puncture needles of different sizes, and the insertion head 210 facilitates the insertion of the device into the target site, improving the convenience and success rate of the puncture operation.

[0038] like Figure 2 , Figure 4 and Figure 8 As shown, an annular plate 33 is fixedly installed on the bottom of the inner wall of the variable diameter fixing box 4 at the position outside the support base 32. A fixing groove 34 is opened at the upper end of the annular plate 33. An annular insert plate 35 is inserted into the inner wall of the fixing groove 34. A conical pressure plate 36 is fixedly installed on the top inner side of the annular insert plate 35. The upper end of the pressure plate 36 abuts against the lower end of the four card slot frames 21, and the lower end of the pressure plate 36 abuts against the upper edge of the rubber sleeve 31.

[0039] During the assembly of the device, the robotic arm first places the conical rubber sleeve 31 on the support base 32, and the annular insert plate 35 is inserted into the fixing groove 34, so that the pressure plate 36 can apply pressure to the rubber sleeve 31, further fixing the rubber sleeve 31 and enhancing the sealing effect. At the same time, when the limit frame 5 is installed, it also squeezes the pressure plate 36, which also helps to maintain the overall stability of the device.

[0040] like Figure 8 As shown, the pressure plate 36 has a structure in which the size gradually decreases towards the axis of the through hole.

[0041] like Figure 8 As shown, a rubber pad 37 is fixedly installed on the bottom of the inner wall of the fixing groove 34, and the upper end of the rubber pad 37 abuts against the lower end of the annular insert plate 35.

[0042] The rubber gasket 37 serves as a buffer and further seals, reducing the gap between the annular insert plate 35 and the annular plate 33, preventing liquid or gas from leaking from the fixed groove 34, and further improving the sealing structure of the device.

[0043] like Figure 4 As shown, an annular limiting groove 6 is provided at the bottom edge of the inner wall of the variable diameter fixing box 4, and a sealing strip 7 matching the limiting groove 6 is fixedly installed at the lower end of the limiting frame 5. An annular extrusion groove 8 is provided at the top of the inner wall of the variable diameter fixing box 4, and an annular extrusion block 9 matching the extrusion groove 8 is fixedly installed at the top of the outer wall of the limiting frame 5.

[0044] When installing the limiting frame 5, the limiting groove 6 and the sealing strip 7 play a limiting role, while the extrusion groove and the annular extrusion block play a fixing role.

[0045] The working principle of this utility model is as follows: In use, the puncture needle 29 is inserted into the valve body on the air-sealed valve cover 1 and continues to advance towards the through hole 22. When the puncture needle 29 pierces the gap in the middle of the four variable-diameter extension plates 23 and moves downward along the channel 28 at its bottom, the channel 28, composed of several variable-diameter plates surrounding and downward, has an expandable property, thereby causing the entire channel 28 to expand outward. At the same time, the four variable-diameter extension plates 23 are also expanded, causing the rubber sleeve 31 to undergo elastic deformation and be supported within the through hole 22. Finally, the puncture needle 29 extends out from the insertion head 210. After the puncture needle 29 is assembled with the channel 28, medical personnel insert the insertion head 210 at the bottom of the channel 28 into the human tissue through the air-sealed valve cover 1. As the puncture needle 29 penetrates deeper, the puncture cannula is gradually guided into the abdominal cavity. Then, the puncture needle 29 is removed, and other surgical instruments can be used. During the production and assembly of the entire device, the rubber sleeve 31 is installed first, followed by the fixing of the limiting frame 5. The annular insert plate 35 is inserted into the fixing groove 34, allowing the pressure plate 36 to apply pressure to the rubber sleeve 31. When the limiting frame 5 is installed, it also presses against the pressure plate 36, which helps to maintain the overall stability of the device.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A variable diameter dilatation puncture cannula device, comprising an air-sealed valve cover (1), characterized in that: The inner wall of the air shut-off valve cover (1) is threadedly connected to a variable diameter fixing box (4), and the bottom of the inner wall of the variable diameter fixing box (4) is movably connected to a limit frame (5). The inner wall of the limit frame (5) is fixedly installed with a fixing part limiting component (2), and the bottom of the inner wall of the variable diameter fixing box (4) is fixedly installed with a variable diameter part supporting sealing component (3). The fixing part limiting assembly (2) includes four top open locking frames (21). The four locking frames (21) are arranged in a ring around the inner wall of the limiting frame (5). The lower end of the variable diameter fixing box (4) has a through hole (22). The inner wall of the through hole (22) is movably fitted with four variable diameter extension plates (23). The four variable diameter extension plates (23) are formed by several variable diameter pieces extending upward. The bottom of the four variable diameter extension plates (23) is formed by several variable diameter pieces extending downward to form a channel. The lower end of the top of the four variable diameter extension plates (23) is movably connected to the inner wall of the four locking frames (21). The variable diameter section support sealing assembly (3) includes a tapered rubber sleeve (31), which is located inside the through hole (22) and its inner wall bottom abuts against the outer wall bottom of the four variable diameter extension plates (23). A support seat (32) is fixedly installed on the inner wall of the through hole (22), and the lower end of the top of the rubber sleeve (31) overlaps with the upper edge of the support seat (32).

2. The variable diameter dilatation puncture cannula device according to claim 1, characterized in that: Two limiting plates (24) are fixedly installed at the lower end of the top of each of the variable diameter extension plates (23). Two partitions (25) matching the two limiting plates (24) are fixedly installed on the inner wall of each of the card slot frames (21). An annular arc-shaped card block (26) is fixedly installed on the top of each pair of adjacent limiting plates (24) on the side away from each other. An annular arc-shaped card groove (27) matching the two arc-shaped card blocks (26) is opened on the top of each pair of adjacent partitions (25) on the opposite side.

3. The variable diameter dilatation puncture cannula device according to claim 1, characterized in that: The top of the four variable diameter extension plates (23) is a trumpet-shaped structure. The four variable diameter extension plates (23) and their bottom structures together form an expandable channel (28). The inner wall of the channel (28) is movably connected to a puncture needle (29), and the bottom of the channel (28) is fixedly installed with an insertion head (210).

4. The variable diameter expansion puncture cannula device according to claim 1, characterized in that: An annular plate (33) is fixedly installed on the bottom of the inner wall of the variable diameter fixing box (4) at the position outside the support base (32). A fixing groove (34) is opened at the upper end of the annular plate (33). An annular insert plate (35) is inserted into the inner wall of the fixing groove (34). A conical pressure plate (36) is fixedly installed on the top inner side of the annular insert plate (35). The upper end of the pressure plate (36) abuts against the lower end of the four card slot frames (21), and the lower end of the pressure plate (36) abuts against the upper edge of the rubber sleeve (31).

5. The variable diameter dilatation puncture cannula device according to claim 4, characterized in that: The pressure plate (36) has a structure in which the size gradually decreases towards the center of the through hole.

6. The variable diameter expansion puncture cannula device according to claim 5, characterized in that: A rubber pad (37) is fixedly installed on the bottom of the inner wall of the fixing groove (34), and the upper end of the rubber pad (37) abuts against the lower end of the annular insert plate (35).

7. The variable diameter expansion puncture cannula device according to claim 1, characterized in that: An annular limiting groove (6) is provided at the bottom edge of the inner wall of the variable diameter fixing box (4). A sealing strip (7) matching the limiting groove (6) is fixedly installed at the lower end of the limiting frame (5). An annular extrusion groove (8) is provided at the top of the inner wall of the variable diameter fixing box (4). An annular extrusion block (9) matching the extrusion groove (8) is fixedly installed at the top of the outer wall of the limiting frame (5).

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