Low resistance universal seal and trocar for trocar

A technology of sealing device and puncture device, applied in the field of puncture device, to achieve the effect of maintaining dynamic sealing performance, increasing resistance and good dynamic sealing performance

Active Publication Date: 2016-06-22
GUANGZHOU T K MEDICAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the prior art sealing device and puncture device can not meet this requirement, and thus need to be improved

Method used

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  • Low resistance universal seal and trocar for trocar
  • Low resistance universal seal and trocar for trocar
  • Low resistance universal seal and trocar for trocar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] Embodiment 1: 4-lobe low-resistance general-purpose sealing device of the present invention

[0134] refer to Figure 2-1 to Figure 2-11 According to the technical scheme of the present invention, design specific part drawings.

[0135] The upper slider (11), the lower slider (21) and the connecting locking mechanism (4) are made of medical polymer materials, and the materials are selected from: including but not limited to, medical PP, medical PE, medical PU, medical PA, medical PC and other medical plastics. Wherein, the guide surface (111) of the upper slider and the guide surface (211) of the lower slider can be provided with super-slippery material coating to reduce the frictional resistance when the surgical instrument moves.

[0136] The sealing ring (3) is made of medical elastic materials, including but not limited to flexible medical materials such as medical silicone, medical rubber, medical polyurethane, and medical latex.

[0137] When assembling, put th...

Embodiment 2

[0151] Embodiment 2: The sealing device of the present invention adopting the shaft connection type dynamic connection mechanism

[0152] refer to Figure 3-1 to Figure 3-5 , the technical principle of this embodiment is the same as that of Embodiment 1, the only difference is that in Embodiment 1, the dynamic connection mechanism (112) adopts the weak strength area formed by the groove, and in this implementation example, the dynamic connection mechanism (112) (112) adopts the dynamic connection mode of the rotating shaft, and the shaft positioning groove (1124) provided on the positioning block (52) of the rotating shaft (1122) and the puncture device forms a dynamic connection between the shaft positioning groove and the rotating shaft. There are many specific connection methods between the rotating shaft and the shaft positioning groove, and engineers in this field can design according to specific conditions.

[0153] exist Figure 3-6In , a spherical limit rotation mech...

Embodiment 3

[0154] Embodiment 3: The sealing device of the present invention adopts the concave-convex snap fit to connect the locking mechanism

[0155] refer to Figure 4-1 to Figure 4-4 , the technical principle of this embodiment is the same as that of Embodiment 1, the only difference is that the connecting locking mechanism (4) of the present invention is composed of a locking nail (41) on the lower slider and a locking groove (42) on the upper slider , the locking nail (41) is inserted upward into the locking groove (42) on the upper slider, and the sealing ring (3) can be compressed between the upper slider (11) and the lower slider (21), and the upper and lower sliders form a smooth transition. This locking nail (41) and the concave-convex engagement structure formed by the locking groove (42) form a locking connection locking mechanism (4), wherein the locking nail (41) can be injection-molded with the lower slider (21) as a whole, Equally locking groove (42) also can be direc...

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Abstract

The low-resistance general-purpose sealing device and trocar used for the trocar, because the sealing ring is compressed between the upper guide mechanism and the lower guide mechanism, through the smooth transition between the upper guide mechanism and the lower guide mechanism, the maximum The structure that reduces the contact area between the sealing ring and the surgical instrument not only has a guiding function when the surgical instrument enters or exits, it is suitable for the insertion and withdrawal of surgical instruments of various shapes; The soft-hard friction zone can be transformed into the "hard-hard" friction zone between the plastic of the upper and lower guide surfaces and the metal sheath of the surgical instrument to the greatest extent, which greatly reduces the movement resistance and has a good sealing effect. At the same time, the sealing device and the puncture device of the present invention can use instruments with any diameter between 5 mm and 12 mm to achieve its versatility.

Description

technical field [0001] The invention relates to a medical device, in particular to a sealing device of a trocar used in laparoscopic surgery and a trocar using the sealing device. Background technique [0002] Laparoscopic surgery has been more and more widely used. In order to avoid iatrogenic infection, the amount of disposable trocar (Trocar) used in laparoscopic surgery is also increasing. On the basis of ensuring the performance, the structure is simplified , reduce cost, improve performance, this trend has become the direction of trocar improvement. [0003] The sealing structure of the trocar in the prior art consists of a radial sealing ring and a one-way valve. Among them, there are two kinds of common one-way valves, that is, axial sealing devices. One is a spring pressing structure, which pushes the baffle through the spring and presses the silicone sealing ring to form a seal. It consists of a spring leaf, a baffle, and a silicone sealing ring. The spring leaf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/34
CPCA61B17/3421A61B17/3462A61B2017/3464A61B2017/349A61B17/34
Inventor 周星李艳芳张建刚罗丽飞
Owner GUANGZHOU T K MEDICAL INSTR
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