Puncture outfit and puncture outfit sealing cap fixing structure

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a puncture outfit and a puncture outfit sealing cap fixing structure. The utility model provides a puncture outfit and a sealing cap fixing structure thereof, aiming at the current situation that the sealing cap fixing structure in the puncture outfit has a continuous optimization space in the prior art, the puncture outfit and the sealing cap fixing structure thereof comprise a base and a sealing buckle, the base is provided with an L-shaped empty slot, the sealing buckle is elastically pressed above the L-shaped empty slot to form a [-shaped space, and the sealing buckle is arranged in the [-shaped space. And the periphery of the sealing cap is pressed in the [-shaped space to form sealing limit. Meanwhile, the utility model provides specific application of the sealing cap fixing structure in a puncture outfit.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a trocar and a fixing structure for a trocar sealing cap. Background Art

[0002] The trocar sealing cap is sleeved in the trocar cannula and is used to isolate the inside and outside of the trocar surgical channel to maintain pneumoperitoneum. There are many ways to seal and fix the trocar sealing cap in the trocar cannula, such as punching holes in the edge of the sealing cap and then pressing the upper cover plate; or pressing and locking the edge of the sealing cap.

[0003] For example, the Chinese utility model patent discloses a sealing device and a trocar of a trocar [Application No.: CN202222572609.9]. The utility model includes: a fixing structure formed with a central through-channel; a protection component located in the central through-channel, including a plurality of circumferentially arranged protection pieces, and the first connection ends of each protection piece are fixedly installed on the fixing structure; a sealing valve, which is an elastic member, including a first conical part and a second conical part with opposite taper directions, a first through-hole is formed between the first conical part and the second conical part, the second connection end of the first conical part is fixedly installed on the fixing structure, and the second conical part is provided with a circumferential edge; a rigid annular structure, which is adaptively connected with the circumferential edge.

[0004] This utility model fixes the trocar sealing cap by means of nested pressing layer by layer. There are many parts and the assembly is complex, and there is still room for further structural improvement. Summary of the Invention

[0005] The purpose of the utility model is to solve the above problems and provide a trocar and a fixing structure for a trocar sealing cap.

[0006] The utility model includes a base and a sealing buckle. The base is provided with an L-shaped empty groove, and the sealing buckle is elastically pressed above the L-shaped empty groove to form a U-shaped space. The outer circumference of the sealing cap is pressed in the U-shaped space to form a sealing limit.

[0007] Specifically, there are two schemes for the base: one is several separated L-shaped sheet / block structures; or the base is a frustum structure with an L-shaped cross-section, that is, an L-shaped groove can be formed to place the outer circumference of the sealing cap.

[0008] Preferably, the sealing buckle includes an annular base, a large ring and a small ring. The large ring is connected below the annular base. The large ring is an elastic structure and is pressed above the L-shaped empty groove to cooperate with the base to form a U-shaped space; the small ring is connected below the large ring and is pressed on the upper surface of the sealing cap; a needle rod channel is opened in the center of the annular base for the trocar needle rod to pass through, and the needle rod channel penetrates through the large ring and the small ring.

[0009] Preferably, as a relatively new trend in the industry, the sealing cap includes an upper sealing cap and a lower sealing cap. To cooperate with the sealing structure of the present invention, the upper sealing cap and the lower sealing cap are connected by a stacking method.

[0010] Preferably, the upper sealing cap includes a disc with a needle rod through-hole and a peripheral wall connected to the outer periphery of the disc. The large ring is nested and connected to the inner wall of the peripheral wall and pressed on the disc. The lower sealing cap includes an annular base and a one-word sealing cap body. The bottom of the disc is stacked on the annular base, and part of the peripheral wall and the annular base are pressed into the C-shaped space.

[0011] This structure is applied to a trocar including a trocar cannula and a trocar needle rod, and one or more of the above structures can be adopted.

[0012] Preferably, the trocar cannula includes an outer wall and a trocar needle rod channel. The trocar needle rod sequentially passes through the sealing buckle, the sealing cap to the trocar needle rod channel. The inner side of the outer wall is connected to the long side of the base, and the trocar needle rod channel is connected to the horizontally protruding part at the lower end of the L-shaped slot.

[0013] Preferably, the trocar further includes an outer cover of the trocar cap body. An elastic sheet is arranged on the outer periphery above the sealing buckle. The outer cover of the cap body and the elastic sheet form an elastic nested structure and are connected as a whole, which is convenient for assembly and disassembly.

[0014] Preferably, a sealing ring is connected to the periphery of the sealing buckle. The sealing ring forms a squeezing connection with the inner wall of the trocar cannula to achieve sealing. As a preferred solution, it can be arranged on the above-mentioned large ring.

[0015] Compared with the existing technology, the advantages of the present invention are as follows:

[0016] 1. The fixed structure design of the sealing cap of the present invention is simple, saving materials and assembly time;

[0017] 2. The method of inserting the elastic sheet into the outer cover of the cap body provided by the present invention further improves the assembly convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the trocar of the present invention;

[0019] Figure 2 is Figure 1 a sectional view;

[0020] Figure 3 is Figure 1 an exploded view;

[0021] Figure 4 is Figure 1 an exploded schematic diagram of part of the structure;

[0022] Figure 5 Schematic diagram of the trocar cannula structure

[0023] Figure 6 Schematic diagram of the sealing buckle

[0024] Figure 7 Schematic diagram of another perspective of the sealing buckle

[0025] Figure 8 Schematic diagram of the frustum structure

[0026] In the figure: base 1, sealing buckle 2, C-shaped space 3, sealing cap 4, trocar cannula 5, trocar needle rod 6, outer cover of the cap 7, L-shaped empty groove 11, annular base 21, large ring 22, small ring 23, upper sealing cap 41, lower sealing cap 42, outer wall 51, trocar needle rod channel 52, elastic piece 211, sealing ring 221, disc 411, peripheral wall 412, annular base 421, one-word sealing cap body 422, frustum structure 1a Specific implementation mode

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes

[0028] Embodiment 1: The present invention is a trocar and a fixing structure of the trocar sealing cap. As shown in Figures Figure 2 , 3 , 5, the fixing structure of the sealing cap of the trocar includes a base 1 and a sealing buckle 2; the base 1 is provided with an L-shaped empty groove 11, and the sealing buckle 2 is elastically pressed above the L-shaped empty groove 11 to form a C-shaped space 3

[0029] As shown in Figures Figure 1 , 2 , 5, the trocar includes a trocar cannula 5 with an outer wall 51 and a trocar needle rod channel 52 and a trocar needle rod 6. The trocar needle rod 6 sequentially penetrates through the sealing buckle 2, the sealing cap 4 to the trocar needle rod channel 52. The inner side of the outer wall 51 is connected to the long side of the base 1, and the trocar needle rod pipeline 52 is connected to the horizontally protruding part at the lower end of the L-shaped empty groove 11

[0030] In the present invention, when in use, after the outer periphery of the sealing cap 4 is clamped into the C-shaped space 3, the sealing buckle 2 is used to press it in the C-shaped space 3 to form a sealing limit with the outer wall 51 of the trocar cannula 5, so as to realize the internal and external airtight isolation of the trocar surgical channel (i.e., the corresponding trocar needle rod channel 52)

[0031] Preferably, the base 1 is a separated plurality of L-shaped sheet / block structures Figure 5 This is only an example of the sheet structure

[0032] Preferably, as shown in Figures Figure 7As shown, the sealing buckle 2 includes an annular base 21, a large ring 22 and a small ring 23. The large ring 22 is connected below the annular base 21. The large ring 22 is an elastic structure and is pressed above the L-shaped empty groove 11. The small ring 23 is connected below the large ring 22 and is pressed on the upper surface of the sealing cap 4. A needle rod channel is formed in the center of the annular base 21, and the needle rod channel penetrates through the large ring 22 and the small ring 23.

[0033] Preferably, the sealing cap 4 includes an upper sealing cap 41 and a lower sealing cap 42, and the upper sealing cap 41 and the lower sealing cap 42 are connected by a stacking method.

[0034] Preferably, as Figure 4 shown, the upper sealing cap 41 includes a disc 411 with a needle rod through hole and a peripheral wall 412 connected to the outer periphery of the disc 411. The large ring 22 of the sealing buckle 2 is nested and connected with the inner wall of the peripheral wall 412 and is pressed on the disc 411. The lower sealing cap 42 includes an annular base 421 and a one-word sealing cap body 422. The bottom of the disc 411 is stacked on the annular base 421, and a part of the peripheral wall 412 of the upper sealing cap 41 and the annular base 421 of the lower sealing cap 42 are pressed in the C-shaped space 3.

[0035] As a preference, as Figure 4 shown, the puncture device further includes a cap outer cover 7. As Figure 6 shown, elastic pieces 211 are arranged on the outer periphery above the sealing buckle 2, and the cap outer cover 7 and the elastic pieces 211 form an elastic nested structure and are connected as a whole.

[0036] As a preference, a sealing ring 221 is connected to the periphery of the sealing buckle 2. As Figure 3 shown, the sealing ring can be arranged on the large ring 22, and the sealing ring 221 forms an extrusion connection with the inner wall of the puncture device sleeve 5.

[0037] The working principle of this embodiment is: as Figure 2 、 3 shown, after stacking the upper sealing cap 41 and the lower sealing cap 42, the middle of the sealing cap 4 is embedded in the puncture device needle rod channel 52, and the periphery is embedded in the L-shaped empty groove 11 of the base 1. Then, the sealing buckle 2 is covered. The closed space composed of the large ring 22 of the sealing buckle 2, the base 1 and the outer wall of the puncture device needle rod channel 52 firmly presses and fixes the sealing cap 4, and the sealing ring 221 on the sealing buckle 2 plays a further sealing role.

[0038] Embodiment 2: The same parts as in the embodiment will not be described in detail. The difference from Embodiment 1 is that, as Figure 8In the present embodiment, the base 1 is a frustum structure 1a with an L-shaped cross-section. It is easy to think that, similar to Embodiment 1, one end of the base 1 is connected to the outer wall 51 of the trocar cannula 5, and the other end is connected to the trocar needle rod channel 52. The installation steps of the sealing cap 4 and the like are the same as those in Embodiment 1. This solution facilitates the manufacturing and production of the mold.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0040] Although terms such as base 1, sealing buckle 2, C-shaped space 3, sealing cap 4, trocar cannula 5, trocar needle rod 6, outer cover of the cap 7, L-shaped groove 11, annular base 21, large ring 22, small ring 23, upper sealing cap 41, lower sealing cap 42, outer wall 51, trocar needle rod channel 52, elastic piece 211, sealing ring 221, disc 411, peripheral wall 412, annular base 421, one-word sealing cap body 422, frustum structure 1a, etc. are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A fixing structure for a puncture device sealing cap, comprising a base (1) and a sealing buckle (2), characterized in that: The base (1) is provided with an L-shaped empty groove (11), and the sealing buckle (2) is elastically pressed above the L-shaped empty groove (11) to form a U-shaped space (3), and the outer periphery of the sealing cap (4) is pressed in the U-shaped space (3) to form a sealing limit.

2. The fixed structure of the puncture device sealing cap according to claim 1, characterized in that: The base (1) is composed of several separated L-shaped sheet or block structures.

3. A fixing structure of a puncture device sealing cap according to claim 1, characterized in that: The base (1) is a frustum structure (1a) with an L-shaped cross-section.

4. The fixing structure of the puncture device sealing cap according to claim 1, wherein: The sealing buckle (2) includes an annular base (21), a large ring (22) and a small ring (23). The large ring (22) is connected below the annular base (21), and the large ring (22) is an elastic structure and is pressed above the L-shaped empty groove (11); the small ring (23) is connected below the large ring (22) and is pressed on the upper surface of the sealing cap (4); a needle rod channel is opened in the center of the annular base (21), and the needle rod channel penetrates through the large ring (22) and the small ring (23).

5. The fixed structure of the puncture device sealing cap according to claim 4, characterized in that: The sealing cap (4) includes an upper sealing cap (41) and a lower sealing cap (42), and the upper sealing cap (41) and the lower sealing cap (42) are connected by a stacking method.

6. The fixing structure of the puncture device sealing cap according to claim 5, characterized in that: The upper sealing cap (41) includes a disc (411) with a needle rod through-hole and a peripheral wall (412) connected to the outer periphery of the disc (411). The large ring (22) is nested and connected with the inner wall of the peripheral wall (412) and is pressed on the disc (411); the lower sealing cap (42) includes an annular base (421) and a one-piece sealing cap body (422). The bottom of the disc (411) is stacked on the annular base (421), and part of the peripheral wall (412) and the annular base (421) are pressed in the U-shaped space (3).

7. A trocar, comprising a trocar cannula (5) and a trocar needle rod (6), characterized in that: Adopt the puncture device sealing cap fixing structure according to any one of claims 1-6.

8. A trocar according to claim 7, characterized in that: The puncture device sleeve (5) includes an outer wall (51) and a puncture device needle rod channel (52). The puncture needle rod (6) sequentially penetrates through the sealing buckle (2), the sealing cap (4) to the puncture device needle rod channel (52). The inner side of the outer wall (51) is connected to the long side of the base (1), and the puncture device needle rod channel (52) is connected to the horizontally protruding part at the lower end of the L-shaped empty groove (11).

9. A trocar according to claim 7, characterized in that: It further includes a cap outer cover (7) on the puncture device. An elastic sheet (211) is arranged on the outer periphery above the sealing buckle (2), and the cap outer cover (7) and the elastic sheet (211) form an elastic nested structure and are connected as a whole.

10. A trocar according to claim 7, characterized in that: A sealing ring (221) is connected to the periphery of the sealing buckle (2), and the sealing ring (221) forms an extrusion connection with the inner wall of the puncture device sleeve (5).

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