Radial universal sealing device for trocar and trocar
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A technology of sealing device and puncture device, applied in the field of puncture device, to achieve the effect of low resistance, good dynamic sealing performance and increased resistance
Active Publication Date: 2016-04-06
GUANGZHOU T K MEDICAL INSTR
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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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Embodiment 1
[0073] Embodiment 1: Radial universal sealing device of the present invention
[0074] refer to Figure 1 to Figure 13 , according to the technical scheme of the present invention, design concrete part drawings.
[0075] The guide adjustment mechanism (1), the guide adjustment mechanism housing (2), and the rotation mechanism (4) are made of medical polymer materials, and the materials are selected from: including but not limited to, medical PC, medical PP, medical PE, medical PU, medical PA and other medical plastics. Wherein, super-slippery material coatings can be provided on the upper guide surface (102) and the lower guide surface (103) to reduce the frictional resistance when the surgical instrument moves.
[0076] 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. Sjiao
[0077] When assembling, insert the positioning hoo...
Embodiment 2
[0090] Embodiment 2: trocar of the present invention
[0091] refer to figure 1 , figure 2 , image 3 , Figure 15-1 to Figure 15-4 .
[0092] In this embodiment, the trocar includes the radial universal sealing device of the present invention.
[0093] In this embodiment, the trocar consists of a sheath (7) and a puncture rod (8). The sheath (7) contains a radial sealing module (71), a one-way valve module (72) and an outer tube (73).
[0094] The radial sealing module (71) includes a casing (711), a radial universal sealing device (5) of the present invention, an upper pressing plate (712), a lower pressing plate (713), and a special-shaped sealing ring (714). The universal sealing device (5) of the present invention is installed in the casing (711). The upper pressing plate (712) presses the installation edge (34) of the sealing device (5) of the present invention, and a special-shaped sealing ring (714) is installed between the upper pressing plate (712) and the lo...
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Abstract
A radial universal seal device for a trocar and a trocar comprising the radial universal seal device. The radial universal seal device comprises: a guiding and adjustment mechanism (1), a seal ring (3), a rotary mechanism (4), and a housing (2). The guiding and adjustment mechanism (1) is of a wasp waist-shaped funnel structure with a big upper end, a small middle part, and a big lower end. When a surgical instrument (9) is inserted, by taking the wasp waist of the wasp waist-shaped funnel structure as a fulcrum, and through concerted movement of a rotary shaft (101), a wasp waist adjustment fulcrum (104), an expanded edge (105), and a force bearing edge (32) of the seal ring (3), the guiding and adjustment mechanism (1) can automatically sense the size of the outer diameter of the surgical instrument (9), so as to adjust the diameter of a surgical instrument through hole (31) of the seal ring (3), thereby achieving the objective of automatically adapting to different inserted surgical instruments (9), and not only achieving the low motion resistance but also keeping desirable sealing performance.
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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