Variable-diameter puncture outfit

Abstract

The utility model provides a diameter-variable puncture outfit, which solves the problems of internal sealing performance and the like of the puncture outfit and comprises an upper shell and a lower shell, the top of the upper shell is provided with an operation port, the side surface of the upper shell is provided with an air inlet, the lower shell is connected with a puncture tube, and the puncture tube comprises a main tube body integrally formed with the lower shell. An auxiliary pipe body made of flexible materials is installed in the main pipe body, an expansion assembly is installed between the main pipe body and the auxiliary pipe body, and a puncture core extending into the auxiliary pipe body is inserted into the operation opening of the upper shell. The sealing structure has the advantages of good sealing performance, stable structure and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a variable-diameter puncture device. Background Art

[0002] The primary purpose of disposable laparoscopic trocars during laparoscopic surgery is to penetrate the entire abdominal wall, establishing a channel between the outside world and the abdominal cavity. This allows surgical instruments to enter the abdominal cavity through the trocar cannula, completing the procedure and achieving the same goals as traditional open surgery. However, in actual use, existing trocars are difficult to replace, making switching surgical instruments cumbersome. Furthermore, the required sealing properties of the trocar cannula cannot be guaranteed when adjusting its inner diameter.

[0003] In order to address the shortcomings of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a variable diameter puncture device [201610673361.1], which includes a puncture cone, a puncture cannula, a valve body, a locking fixed cover, a positioning guide cover, and a variable diameter mechanism; the puncture cone includes a fixed cover, a lower cover, a fixed cover, and a puncture cone; the puncture cannula includes a sealing ring, and the upper portion of the puncture cannula is provided with a mounting boss; the valve body includes an air injection valve, an air injection switch, a self-adjusting sealing cap, and an air sealing plate; the positioning guide cover includes an upper fixed cover, a lower fixed cover, and an elastic sealing ring; the variable diameter mechanism includes a rotary cover, a dial, an arc-shaped groove, and four evenly distributed sliders; the dial is installed in the rotary cover, the four arc-shaped grooves are provided on the dial, the four sliders are evenly installed in the arc-shaped grooves, one end of the four sliders is connected to the dial, and turning the dial drives the sliders to slide in the arc-shaped grooves.

[0004] The above solution solves the problem of replacing the puncture tube sleeve to a certain extent, but the solution still has many shortcomings, such as the inability to ensure the sealing of the puncture channel. Summary of the Invention

[0005] The purpose of the utility model is to provide a variable diameter puncture device with reasonable design and good sealing performance in order to solve the above problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a variable-diameter puncture device, comprising an upper shell and a lower shell, an operating port is opened on the top of the upper shell and an air inlet is opened on the side, the lower shell is connected to a puncture tube, the puncture tube comprises a main body integrally formed with the lower shell, a secondary tube body made of flexible material is installed inside the main body, an expansion assembly is installed between the main body and the secondary tube body, and a puncture core extending into the secondary tube body is inserted into the operating port of the upper shell.

[0007] In the above-mentioned variable diameter puncture device, the upper shell and the lower shell are threadedly connected and a sealing step surface that fits each other is provided between them. A plug-in tube extending inward is provided at the operating port of the upper shell, and a locking assembly is provided between the plug-in tube and the puncture core.

[0008] In the above-mentioned variable diameter puncture device, the puncture core includes a flange that fits with the top of the upper shell and a core tube that fits with the inner side of the insertion tube. A limit strip and a limit groove that are slidably connected to each other are provided between the core tube and the insertion tube. The limit strip and the limit groove are arranged symmetrically relative to the center of the core tube and the insertion tube.

[0009] In the above-mentioned variable diameter puncture device, the locking assembly includes a locking ring rotatably mounted on the top of the upper shell, the locking ring is mounted on the inner side of the operating port, the inner side of the operating port has a locking protrusion extending toward the center of the operating port, the locking protrusion and the operating port are connected by an integrally formed elastic strip, and a relative pressing inclined surface is provided between the locking ring and the elastic strip, and the puncture core has a locking groove for inserting the locking protrusion.

[0010] In the above-mentioned variable diameter puncture device, an indicator scale extending along the axial direction is provided on the outside of the puncture tube, and the lower end of the puncture tube is inclined.

[0011] In the above-mentioned variable-diameter trocar, the expansion assembly includes an expansion balloon filled between the main tube body and the auxiliary tube body, and support ribs extending in the axial direction are distributed inside the expansion balloon.

[0012] In the above-mentioned variable diameter puncture device, the expansion airbags are centrally symmetrically arranged relative to the main tube body and the auxiliary tube body, and a ventilation pipe communicating with the air inlet is left between adjacent expansion airbags.

[0013] In the above-mentioned variable diameter trocar, a circumferentially surrounding convex edge is provided on the outer side of the lower shell, and reinforcing ribs are provided between the upper and lower sides of the convex edge and the lower shell.

[0014] In the above-mentioned variable diameter trocar, a protective cover is clamped on the upper end of the upper shell, and a buckle is provided between the edge of the protective cover and the top of the upper shell.

[0015] In the above-mentioned variable diameter trocar, a corrugated section is provided in the middle of the main tube.

[0016] Compared with the existing technology, the advantages of the present invention are: the puncture tube has a built-in collision component, which can apply a certain extrusion torque to the puncture core to ensure its tight fit and internal sealing; a locking component is provided between the upper shell and the puncture core, which can realize their rapid separation or locking, facilitating the rapid replacement of the puncture core; the upper shell is threadedly connected to the lower shell, and the lower shell is equipped with a reinforcement structure to ensure the overall structural stability of the puncture device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural sectional view of the utility model;

[0018] Figure 2 It is a partial cross-sectional view of the utility model;

[0019] Figure 3 It is another partial cross-sectional view of the utility model;

[0020] Figure 4 It is another partial cross-sectional view of the utility model;

[0021] Figure 5 It is a structural cross-sectional view of the locking assembly of the utility model;

[0022] In the figure, the upper shell 1, the protective cover 11, the buckle 12, the lower shell 2, the flange 21, the reinforcing rib 22, the operating port 3, the air inlet 4, the puncture tube 5, the main body 51, the auxiliary tube body 52, the indicator scale 53, the corrugated section 54, the expansion assembly 6, the expansion airbag 61, the supporting rib 62, the ventilation pipe 63, the puncture core 7, the flange 71, the core tube 72, the limit strip 73, the limit groove 74, the sealing step surface 8, the plug-in tube 81, the locking ring 82, the locking protrusion 83, the elastic strip 84, the top pressure slope 85, and the locking groove 86. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] like Figure 1-5 As shown, a variable diameter puncture device includes an upper shell 1 and a lower shell 2 made of plastic material. The upper shell 1 has an operation port 3 on the top and an air inlet 4 on the side. A cavity connected to the operation port 3 and the air inlet 4 is left between the upper shell 1 and the lower shell 2. The lower shell 2 is connected to a puncture tube 5. The puncture tube 5 includes a main body 51 integrally formed with the lower shell 2 and has a smooth transition at the junction. A secondary tube 52 made of a flexible material is installed inside the main body 51. An expansion assembly 6 is installed between the main body 51 and the secondary tube 52. A puncture core 7 extending into the secondary tube 52 is inserted into the operation port 3 of the upper shell 1. When the puncture core 7 is inserted into the secondary tube 52, the expansion assembly 6 ensures that the inner side of the secondary tube 52 is tightly fitted with the outer side of the puncture core 7.

[0025] Specifically, the upper shell 1 and the lower shell 2 are threadedly connected and provided with a sealing step surface 8 that fits together. Assembly can be completed manually. An inwardly extending insertion tube 81 is provided at the operation port 3 of the upper shell 1. A locking assembly is provided between the insertion tube 81 and the puncture core 7. When the puncture core 7 is fully inserted into the operation port 3, the locking assembly secures it circumferentially and axially.

[0026] In depth, the puncture core 7 has different tube diameter specifications, which specifically includes a flange 71 that fits with the top of the upper shell 1 and a core tube 72 that fits with the inner side of the insertion tube 81. A limit strip 73 and a limit groove 74 are provided between the core tube 72 and the insertion tube 81 to slide and insert each other and limit their circumferential orientation. The limit strip 73 and the limit groove 74 are arranged symmetrically relative to the center of the core tube 72 and the insertion tube 81. The limit strip 73 and the limit groove 74 extend along the axial direction of the puncture device.

[0027] Furthermore, unlike conventional threaded connection locking methods, the locking assembly in the present application includes a locking ring 82 rotatably mounted on the top of the upper shell 1. The locking ring 82 is mounted on the inside of the operating port 3. The inside of the operating port 3 has a locking protrusion 83 extending toward the center of the operating port 3. The locking protrusion 83 is connected to the operating port 3 by an integrally formed elastic strip 84. Opposing pressing inclined surfaces 85 are provided between the locking ring 82 and the elastic strip 84. The puncture core 7 has a locking groove 86 for the locking protrusion 83 to be inserted. When the locking ring 82 is manually moved, the pressing inclined surface 85 slides circumferentially, and the locking protrusion 83 moves away from the center of the locking ring 82. When the puncture core 7 is fully inserted into the operating port 3, the locking ring 82 is released. The locking ring 82 is reset under the action of the elastic strip 84 and the pressing inclined surface 85, and the locking protrusion 83 is then inserted into the locking groove 86 to be fixed.

[0028] Furthermore, an axially extending indicator scale 53 is provided on the outside of the puncture tube 5 to facilitate the judgment of the insertion depth of the puncture tube 5. The lower end of the puncture tube 5 is tilted and pointed to guide the puncture tube 5 to perform puncture.

[0029] In addition, the expansion component 6 adopts an elastic structure as a whole, specifically including an expansion airbag 61 filled between the main tube body 51 and the auxiliary tube body 52. The inside of the expansion airbag 61 is distributed with support ribs 62 extending axially to maintain its expansion structure. When subjected to the squeezing torque of the puncture tube 5, the expansion airbag 61 is deformed accordingly.

[0030] At the same time, the inflation airbags 61 are arranged in a centrally symmetrical manner relative to the main tube body 51 and the auxiliary tube body 52, and a ventilation pipe 63 connected to the air inlet 4 is left between adjacent inflation airbags 61. The air inlet 4 takes in air and is guided into the abdominal cavity by the ventilation pipe 63, maintaining the balance of internal and external pressures of the abdominal cavity without affecting its internal sealing.

[0031] It can be seen that in order to maintain the stability of the internal cavity structure, a circumferentially surrounding convex edge 21 is provided on the outer side of the lower shell 2, and reinforcing ribs 22 are provided between the upper and lower sides of the convex edge 21 and the lower shell 2 to further improve its structural strength.

[0032] Obviously, under normal conditions, a protective cover 11 is clamped on the upper end of the upper shell 1 to close the operation port 3. A buckle 12 is provided between the edge of the protective cover 11 and the top of the upper shell 1, and the protective cover 11 can be separated from the upper shell 1 manually.

[0033] Preferably, a corrugated section 54 is provided in the middle of the main tube 51 to play a certain anti-slip role.

[0034] To sum up, the principle of this embodiment is that the upper shell 1 and the lower shell 2 are combined, wherein the puncture tube 5 of the lower shell 2 has an expansion component 6 built in. When the puncture core 7 is inserted into the puncture tube 5, the expansion component 6 applies a certain extrusion torque to ensure its internal sealing.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0036] Although this document frequently uses terms such as upper shell 1, protective cover 11, buckle 12, lower shell 2, flange 21, reinforcing rib 22, operating port 3, air inlet 4, puncture tube 5, main body 51, auxiliary body 52, indicator scale 53, corrugated section 54, expansion assembly 6, expansion airbag 61, supporting rib 62, ventilation pipe 63, puncture core 7, flange 71, core tube 72, limiting strip 73, limiting groove 74, sealing step surface 8, plug-in tube 81, locking ring 82, locking protrusion 83, elastic strip 84, pressing inclined surface 85, and locking groove 86, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A variable diameter puncture device, comprising an upper shell (1) and a lower shell (2), wherein the upper shell (1) has an operation port (3) on the top and an air inlet (4) on the side, and the lower shell (2) is connected to a puncture tube (5), characterized in that: The puncture tube (5) includes a main body (51) integrally formed with the lower shell (2), a secondary tube (52) made of a flexible material is installed inside the main body (51), an expansion assembly (6) is installed between the main body (51) and the secondary tube (52), and a puncture core (7) extending into the secondary tube (52) is inserted into the operating port (3) of the upper shell (1).

2. A variable diameter trocar according to claim 1, characterized in that: The upper shell (1) and the lower shell (2) are threadedly connected and a sealing step surface (8) is provided between them. The operating port (3) of the upper shell (1) is provided with an inwardly extending plug tube (81), and a locking assembly is provided between the plug tube (81) and the puncture core (7).

3. A variable diameter trocar according to claim 2, characterized in that: The puncture core (7) comprises a flange (71) fitted with the top of the upper shell (1) and a core tube (72) fitted with the inner side of the plug tube (81); a limiting strip (73) and a limiting groove (74) that are slidably connected to each other are provided between the core tube (72) and the plug tube (81); the limiting strip (73) and the limiting groove (74) are symmetrically arranged relative to the center of the core tube (72) and the plug tube (81).

4. A variable diameter trocar according to claim 3, characterized in that: The locking assembly comprises a locking ring (82) rotatably mounted on the top of the upper shell (1); the locking ring (82) is mounted on the inner side of the operating port (3); the inner side of the operating port (3) has a locking protrusion (83) extending toward the center of the operating port (3); the locking protrusion (83) and the operating port (3) are connected by an integrally formed elastic strip (84); a relative pressing inclined surface (85) is provided between the locking ring (82) and the elastic strip (84); and the puncture core (7) has a locking groove (86) for the locking protrusion (83) to be inserted.

5. The variable diameter trocar according to claim 1, characterized in that: The outer side of the puncture tube (5) is provided with an indicating scale (53) extending in the axial direction, and the lower end of the puncture tube (5) is arranged at an angle.

6. The variable diameter trocar according to claim 1, characterized in that: The expansion assembly (6) comprises an expansion airbag (61) filled between the main pipe body (51) and the auxiliary pipe body (52), and support ribs (62) extending in the axial direction are distributed inside the expansion airbag (61).

7. The variable diameter trocar according to claim 6, characterized in that: The expansion airbags (61) are centrally symmetrically arranged relative to the main pipe body (51) and the auxiliary pipe body (52), and a ventilation pipe (63) communicating with the air inlet (4) is left between adjacent expansion airbags (61).

8. The variable diameter trocar according to claim 1, characterized in that: The outer side of the lower shell (2) is provided with a circumferentially surrounding convex edge (21), and reinforcing ribs (22) are provided between the upper and lower sides of the convex edge (21) and the lower shell (2).

9. The variable diameter trocar according to claim 1, characterized in that: The upper end of the upper shell (1) is clamped with a protective cover (11), and a buckle (12) is provided between the edge of the protective cover (11) and the top of the upper shell (1).

10. The variable diameter trocar according to claim 1, characterized in that: A corrugated section (54) is provided in the middle of the main pipe (51).

Images