WO2021057281A1

WO2021057281A1 - Puncture rod and trocar

Info

Publication number: WO2021057281A1
Application number: PCT/CN2020/107775
Authority: WO
Inventors: 周星
Original assignee: 周星
Priority date: 2019-09-24
Filing date: 2020-08-07
Publication date: 2021-04-01
Also published as: CN112617981A

Abstract

Disclosed is a puncture rod (300), comprising a puncture mechanism (1) and a handle (2). The handle (2) comprises a handle base (21) and a handle cover (22). The handle base (21) comprises a positioning column (21-1) and a connection groove (21-2); and the handle cover (22) comprises a positioning hole (22-1) and a connection convex step (22-2). The positioning column (21-1) is embedded in the positioning hole (22-1) to achieve positioning between the handle base (21) and the handle cover (22). The connection convex step (22-2) is embedded in the connection groove (21-2) to form a concave-convex clamping-fit connection such that the handle base (21) and the handle cover (22) are connected together. There is no strict requirement for interference between the positioning column (21-1) and the positioning hole (22-1), and a trocar (400) is not prone to accidental loosening of the handle (2) during clinical use so as to achieve safer clinical use.

Description

Piercing rod and piercing device

Technical field

The invention relates to a laparoscopic surgery instrument, in particular to a puncture rod and a puncture device used in laparoscopic surgery.

Background technique

Laparoscopic surgery has become more and more widely used. In order to avoid iatrogenic infections, the amount of disposable trocars (trocars) used in laparoscopic surgery is also increasing. On the basis of ensuring the performance, the operation is reduced. The movement resistance of the device in the puncture device improves the safety performance of the product during the puncture process, and this trend has become the direction of improvement of the puncture device.

The puncture mechanisms of the puncture rods in the prior art are usually connected to the handle base by way of encapsulation, and then the handle base and the handle cover are closed and assembled into a complete puncture rod. In order to realize the closing of the handle seat and the handle cover, the prior art usually realizes the closing of the handle seat and the handle cover through the interference fit between the positioning column and the positioning hole. The positioning is very difficult during the assembly process, and the interference is very demanding. high. If the interference is too large, the positioning column cannot be inserted into the positioning hole, and the assembly cannot be completed. If the interference is too small, the joint strength of the handle base and the handle cover is not enough, and it is easy to loosen.

In order to overcome the above shortcomings, it is necessary to improve the existing puncture rod and puncture device, especially the installation method of the handle base and the handle cover.

Summary of the invention

The puncture rod of the present invention improves the existing assembly method of integral positioning and connection between the positioning column and the positioning hole through interference fit into an assembly method in which the positioning and the connection are completed separately. The puncture rod of the present invention is designed with positioning posts and positioning holes to realize the positioning of the handle base and the handle cover. At the same time, the connection of the handle base and the handle cover is realized through the concave-convex card matching design of the connecting convex step and the connecting groove, and the assembly process is more convenient and reliable.

The puncture rod of the present invention is characterized in that: the puncture rod 300 includes a puncture mechanism 1 and a handle 2; the handle 2 includes a handle seat 21 and a handle cover 22;

A. The handle base 21 includes a positioning column 21-1 and a connecting groove 21-2;

B. The handle cover 22 includes a positioning hole 22-1 and a connecting convex step 22-2;

C. The positioning post 21-1 can be embedded in the positioning hole 22-1, and the connecting convex step 22-2 is embedded in the connecting groove 21-2 to form a concave-convex snap fit connection; the handle seat 21 and the handle cover 22 are connected together by a concave-convex card to form the handle 2;

D. The puncture mechanism 1 is connected to the handle 2 to form the puncture rod 300.

The puncture rod of the present invention improves the existing assembly method of interference fit to realize positioning and connection as a whole into an assembly method in which positioning and connection are completed separately. The positioning post 21-1 is embedded in the positioning hole 22-1 to realize the positioning between the handle base 21 and the handle cover 22. The concave-convex snap-fit connection formed by the connecting convex step 22-2 embedded in the connecting groove 21-2 can easily connect the handle base 21 and the handle cover 22 together. Since the main function of the cooperation between the positioning column 21-1 and the positioning hole 22-1 is to perform positioning, and the connection is made between the connecting groove 21-2 and the connecting convex step 22-2 Concave-convex card matching is realized. Therefore, there is no strict interference requirement between the positioning column 21-1 and the positioning hole 22-1. The processing of parts is simpler, the assembly is more convenient, and the concave-convex card cooperates. The connection formed by the connection method is more reliable and the use process is safer.

The puncture mechanism 1 is connected to the handle 2 as a whole by way of encapsulation. The puncture mechanism 1 and the handle 2 can be connected into a whole by way of encapsulation, which makes the manufacturing process more convenient. Of course, the puncture mechanism 1 and the handle 2 can also be connected by glue, buckle, threaded connection, etc. The applicant does not give specific examples here, but they do not depart from the protection scope of the present application.

The puncture mechanism 1 is provided with at least one anti-rotation hole 1-1 at the rubberized joint. The anti-rotation hole 1-1 can prevent the puncture mechanism 1 from rotating during the rotating puncture process, and the encapsulation effect is better, and the connection between the puncture mechanism 1 and the handle 2 is firmer and more reliable. Preferably, the four anti-rotation holes 1-1 can be evenly distributed at the end of the puncture mechanism 1, and the anti-rotation effect is better.

The puncture mechanism 1 is an optical puncture mechanism 11. The puncture mechanism 1 may be an optical puncture mechanism 11 that can place an observation endoscope and perform observation during the puncture process.

The optical puncture mechanism 11 includes an instrument channel 11-1 and an observation end 11-2. The observation endoscope can reach the observation end 11-2 through the instrument channel 11-1. The transparent observation end 11-2 can form an observation window to observe the puncture process in real time, and the puncture process is safer.

The positioning hole 22-1 is provided with a reinforced convex step 22-11. The positioning hole 22-1 may be provided with a reinforced convex step 22-11, the reinforced convex step 22-11 may be wedge-shaped, and can act as a guide when the positioning column 21-1 enters the positioning hole 22-1 At the same time, the positioning column 21-1 is well fixed in the positioning hole 22-1.

The puncture rod 300 also includes a locking mechanism 3. After the observation endoscope is placed in the instrument channel 11-1, the locking mechanism 3 can lock the observation endoscope, which makes the use process safer and more convenient.

The locking mechanism 3 is a screw-type locking mechanism, a snap-type locking mechanism, or a shrapnel-type locking mechanism. The applicant here only lists the above-mentioned several types of locking mechanisms. In practical applications, those skilled in the art can design different types of locking mechanisms as required, without departing from the scope of protection of this application.

The piercing rod 300 also includes a connecting mechanism 4. The connecting mechanism 4 can connect and fix the puncture rod 300 on the sheath tube 200 of the puncture device 400. During the puncture process, there will be no relative rotation between the puncture rod 300 and the sheath tube 200. The process is more secure.

The connecting mechanism 4 is a rotary connecting mechanism, a concave-convex snap-fitting connecting mechanism, or an interference-fitting connecting mechanism. In practical applications, those skilled in the art can design other various forms of the connecting mechanism 4 as required. The applicant will not illustrate them one by one here, but they do not deviate from the protection scope of the present application.

The connecting mechanism 4 is a concave-convex snap-fit type connecting mechanism; the connecting mechanism 4 includes a connecting hook 41 and a connecting bridge 42; the connecting bridge 42 is provided with a positioning groove 42-1 and an instrument through hole 42-2; The handle base 21 of the puncture rod 300 also includes a positioning block 21-3; the positioning block 21-3 can be embedded in the positioning groove 42-1 to connect the connecting mechanism 4 and the handle 2 together. With a concave-convex snap-fit type connecting mechanism, the connecting hook 41 is inserted into the connecting groove 51 on the end seal assembly 5 of the sheath tube 200 to connect the puncture rod 300 to the sheath tube 200, and use The process is very convenient.

The puncture rod 300 is made of biomedical materials. The biomedical materials can very well ensure the biosafety of the puncture rod 300 during the puncture process of the human body.

When assembling, first connect the piercing mechanism 1 to the handle base 21 by encapsulating, and then insert the positioning pin 31 of the locking mechanism 3 into the lock mounting groove 21-4 of the handle base 21 , Install the connecting mechanism 4 in the handle cover 22, align the positioning column 21-1 with the positioning hole 22-1, and insert it in the positioning hole 22-1, and forcefully close the The handle base 21 and the handle cover 22, the positioning post 21-1 slides along the positioning hole 22-1, and the handle base 21 and the handle cover 22 are closed until the connecting convex step 22-2 is inlaid In the connecting groove 21-2, at this time, the positioning post 21-1 is simultaneously fixed in the positioning hole 22-1 by the reinforcing convex step 22-11 in the positioning hole 22-1, that is, The assembly of the puncture rod 300 can be completed. In the assembly process, the connection is formed by the concave-convex card fitting, and there is no need to connect and fix through other processes such as interference fit or glue. The assembly process is very convenient, and the connection effect is very good. There will be no accidents such as loosening of the handle during clinical use. , The clinical use process is very safe.

The puncture device of the present invention is characterized in that the puncture device 400 includes the puncture rod 300.

The puncture device 400 includes a sheath 200 and a puncture rod 300. The sheath tube 200 includes an end sealing assembly 5 and a sleeve assembly 6. The end surface of the end seal assembly 5 is provided with a connecting groove 51, and the connecting hook 41 of the connecting mechanism 4 can be embedded in the connecting groove 51 to realize the connection of the puncture rod 300 and the sheath 200. The sheath channel 61 of the sleeve assembly 6 matches the puncture mechanism 1 of the puncture rod 300.

In clinical use, the puncture rod 300 is inserted into the sheath 200, the connecting hook 41 is embedded in the connecting groove 51, the puncture rod 300 and the sheath 200 are connected together, and then the The observation endoscope is inserted into the instrument channel 11-1 of the puncture rod 300 through the opening 22-3 on the handle cover 22 and the instrument through hole 42-2, until the observation lens reaches the observation end 11-2, and then The observation endoscope is locked by the locking mechanism 3. Hold the trocar 400 to puncture the human body, complete the puncture under the real-time observation of the observation endoscope, and then press the unlocking switch 43 of the connecting mechanism 4, and the connecting hook 41 moves from the connecting groove 51 Disengage, pull out the puncture rod 300, the sheath 200 left on the human body constitutes an operation channel, and then the clinical operation can be started.

The puncture rod of the present invention includes a puncture mechanism 1 and a handle 2, and the handle 2 includes a handle seat 21 and a handle cover 22. The handle base 21 includes a positioning post 21-1 and a connecting groove 21-2; the handle cover 22 includes a positioning hole 22-1 and a connecting convex step 22-2. The positioning post 21-1 is embedded in the positioning hole 22-1 to realize the positioning between the handle base 21 and the handle cover 22. The concave-convex snap-fit connection formed by the connecting convex step 22-2 embedded in the connecting groove 21-2 can easily connect the handle base 21 and the handle cover 22 together. Since the main function of the cooperation between the positioning column 21-1 and the positioning hole 22-1 is to perform positioning, and the connection is made between the connecting groove 21-2 and the connecting convex step 22-2 Concave-convex card matching is realized. Therefore, there is no strict interference requirement between the positioning column 21-1 and the positioning hole 22-1. The processing of parts is simpler, the assembly is more convenient, and the concave-convex card cooperates. The connection formed by the connection method is more reliable and the use process is safer. Since the puncture device of the present invention contains the puncture rod of the present invention, it is less prone to accidents of loosening the handle during clinical use, and the clinical use is safer.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of the puncture rod of the present invention.

Fig. 1-1 is a front view of Fig. 1.

Fig. 1-2 is a cross-sectional view taken along the line A-A in Fig. 1-1.

Figure 1-3 is a right side view of Figure 1.

Fig. 1-4 is a B-B cross-sectional view of Figs. 1-3.

Figure 1-5 is a structural diagram of the handle cover.

Figure 1-6 is a schematic diagram of the structure of the handle base.

Figure 1-7 is an exploded view of Figure 1.

Fig. 2 is a schematic structural diagram of a puncture device containing the puncture rod of the present invention.

Fig. 2-1 is a right side view of Fig. 2.

Fig. 2-2 is a cross-sectional view taken along the line C-C in Fig. 2-1.

Figure 2-3 is a schematic diagram of the structure of the puncture device of the present invention when the puncture rod is unlocked from the sheath.

In the above figure:

200 is the sheath, 300 is the puncture rod of the present invention, and 400 is the puncture device of the present invention.

1 is a puncture mechanism, 2 is a handle, 3 is a locking mechanism, 4 is a connecting mechanism, 5 is an end seal assembly, 6 is a sleeve assembly, and 1-1 is a non-rotating hole.

11 is the optical puncture mechanism, 11-1 is the instrument channel, and 11-2 is the observation end.

21 is the handle seat, 21-1 is the positioning post, 21-2 is the connection groove, 21-3 is the positioning block, 21-4 is the lock installation slot; 22 is the handle cover, 22-1 is the positioning hole, 22- 2 is a connecting convex step, 22-3 is an opening, and 22-21 is a reinforced convex step.

31 is a positioning pin.

41 is a connecting hook, 42 is a connecting bridge, 42-1 is a positioning slot, 42-2 is an instrument through hole, and 42-3 is an unlocking switch.

51 is the connecting groove.

61 is the sheath channel, and 62 is the gas valve.

detailed description

Example 1: The puncture rod of the present invention

Referring to FIGS. 1 to 1-7, the puncture rod of this embodiment includes a puncture mechanism 1 and a handle 2.

Referring to FIGS. 1-2 and 1-4, in this embodiment, the puncture mechanism 1 is an optical puncture mechanism 11 that can place an observation endoscope and perform observation during the puncture process.

Referring to FIGS. 1-5 and 1-6, the handle 2 includes a handle seat 21 and a handle cover 22. The handle base 21 includes a positioning post 21-1 and a connecting groove 21-2; the handle cover 22 includes a positioning hole 22-1 and a connecting convex step 22-2. The positioning column 21-1 can be embedded in the positioning hole 22-1, and the connecting convex step 22-2 is embedded in the connecting groove 21-2 to form a concave-convex snap fit connection; the handle base 21 and The handle cover 22 is connected together by a concave-convex card to form the handle 2.

In this embodiment, the puncture mechanism 1 is connected to the handle 2 as a whole by way of encapsulation, and the manufacturing process is very convenient. Of course, the puncture mechanism 1 and the handle 2 can also be connected by glue, buckle, threaded connection, etc. The applicant does not give specific examples here, but they do not deviate from the protection scope of this application.

Referring to FIGS. 1-2 and 1-7, the puncture mechanism 1 is provided with at least one anti-rotation hole 1-1 at the rubberized joint. The anti-rotation hole 1-1 can prevent the puncture mechanism 1 from rotating during the rotational puncture process, and the encapsulation effect is better, and the connection between the puncture mechanism 1 and the handle 2 is firmer and more reliable. In this embodiment, the four anti-rotation holes 1-1 are evenly distributed at the end of the puncture mechanism 1, and the anti-rotation effect is better.

Referring to FIGS. 1-5, the positioning hole 22-1 is provided with a reinforced convex step 22-11. The reinforced convex step 22-11 is wedge-shaped. When the positioning pillar 21-1 enters the positioning hole 22-1 At the same time, it can play a guiding role, and at the same time, the positioning column 21-1 is well fixed in the positioning hole 22-1.

1 and FIG. 1-1, in this embodiment, the puncture rod 300 further includes a locking mechanism 3. After the observation endoscope is placed in the instrument channel 11-1, the locking mechanism 3 can lock the observation endoscope, which makes the use process safer and more convenient.

Referring to Figures 1-4, the locking mechanism 3 is a snap-type locking mechanism. In practical applications, those skilled in the art can design different forms of locking mechanisms according to their needs, such as screw-type locking mechanisms, or shrapnel-type locking mechanisms, etc. , The applicant will not give examples one by one here, but they do not deviate from the scope of protection of this application.

Referring to FIGS. 1-3, the puncture rod 300 also includes a connecting mechanism 4. The connecting mechanism 4 can connect and fix the puncture rod 300 on the sheath tube 200 of the puncture device 400. During the puncture process, there will be no relative rotation between the puncture rod 300 and the sheath tube 200. The process is more secure.

Referring to FIGS. 1-2 and 1-7, in this embodiment, the connecting mechanism 4 is a concave-convex snap-fit type connecting mechanism; the connecting mechanism 4 includes a connecting hook 41 and a connecting bridge 42; the connecting bridge 42 is provided with There is a positioning slot 42-1 and an instrument through hole 42-2; the handle base 21 of the puncture rod 300 also includes a positioning block 21-3; the positioning block 21-3 can be embedded in the positioning slot 42-1, Connect the connecting mechanism 4 and the handle 2 together. With a concave-convex snap-fit type connecting mechanism, the connecting hook 41 is inserted into the connecting groove 51 on the end seal assembly 5 of the sheath tube 200 to connect the puncture rod 300 to the sheath tube 200, and use The process is very convenient.

The connecting mechanism 4 may also be a rotary type connecting mechanism, an interference fit type connecting mechanism, or the like. In practical applications, those skilled in the art can also design other various forms of the connecting mechanism 4 as required. The applicant will not illustrate them one by one here, but they do not deviate from the protection scope of this application.

When assembling, first connect the piercing mechanism 1 to the handle base 21 by encapsulating, and then insert the positioning pin 31 of the locking mechanism 3 into the lock mounting groove 21-4 of the handle base 21 , Install the connecting mechanism 4 in the handle cover 22, align the positioning column 21-1 with the positioning hole 22-1, and insert it in the positioning hole 22-1, and forcefully close the The handle base 21 and the handle cover 22, the positioning post 21-1 slides along the positioning hole 22-1, and the handle base 21 and the handle cover 22 are closed until the connecting convex step 22-2 is inlaid In the connecting groove 21-2, at this time, the positioning post 21-1 is simultaneously fixed in the positioning hole 22-1 by the reinforcing convex step 22-11 in the positioning hole 22-1, that is, The assembly of the puncture rod 300 can be completed. In the assembly process, the connection is formed by the concave-convex card fitting, and it does not need to be connected and fixed through other processes such as interference fit or glue.

The puncture rod of this embodiment improves the existing assembly method of interference fit to realize positioning and connection as a whole into an assembly method in which positioning and connection are completed separately. The positioning post 21-1 is embedded in the positioning hole 22-1 to realize the positioning between the handle base 21 and the handle cover 22. The concave-convex snap-fit connection formed by the connecting convex step 22-2 embedded in the connecting groove 21-2 can easily connect the handle base 21 and the handle cover 22 together. Since the main function of the cooperation between the positioning post 21-1 and the positioning hole 22-1 is to perform positioning, and the connection is made between the connecting groove 21-2 and the connecting convex step 22-2 Concave-convex card matching is realized. Therefore, there is no strict interference requirement between the positioning column 21-1 and the positioning hole 22-1. The processing of parts is simpler, the assembly is more convenient, and the concave-convex card cooperates. The connection formed by the connection method is more reliable and the use process is safer.

Example 2: The puncture device of the present invention

Referring to FIGS. 2 to 2-3, the puncture device of this embodiment includes the puncture rod 300 and the sheath 200 described in the first embodiment.

Referring to FIGS. 2 and 2-3, the sheath tube 200 includes an end sealing assembly 5 and a sleeve assembly 6. The end surface of the end seal assembly 5 is provided with a connecting groove 51, and the connecting hook 41 of the connecting mechanism 4 can be embedded in the connecting groove 51 to realize the connection of the puncture rod 300 and the sheath 200. The sheath channel 61 of the sleeve assembly 6 matches the puncture mechanism 1 of the puncture rod 300.

Referring to Figures 2-1 and 2-2, in clinical use, the puncture rod 300 is inserted into the sheath 200, the connecting hook 41 is embedded in the connecting groove 51, and the puncture rod 300 and The sheath tubes 200 are connected together, and then the observation endoscope is inserted into the instrument channel 11-1 of the puncture rod 300 through the opening 22-3 on the handle cover 22 and the instrument through hole 42-2, Until the observation lens reaches the observation end 11-2, the locking mechanism 3 is used to lock the observation endoscope. Hold the trocar 400 to puncture the human body, complete the puncture under the real-time observation of the observation endoscope, open the gas valve 62 on the cannula assembly 6, switch on the CO ₂ gas, and then press the pin The unlocking switch 43 of the connecting mechanism 4, the connecting hook 41 is disengaged from the connecting groove 51, the puncture rod 300 is pulled out, and the sheath 200 left on the human body constitutes the surgical channel, and then the clinical operation can be started .

Since the puncture device of this embodiment contains the puncture rod described in the embodiment, it is less prone to accidents of loosening the handle during clinical use, and the clinical use is safer.

It should be noted that the structures disclosed and described herein can be replaced with other structures with the same effect, and the embodiments described in the present invention are not the only structure for realizing the present invention. Although the preferred embodiments of the present invention have been introduced and illustrated herein, those skilled in the art know that these embodiments are only examples, and those skilled in the art can make numerous changes, improvements and Instead, without departing from the present invention, the protection scope of the present invention should be defined in accordance with the spirit and scope of the appended claims of the present invention.

Claims

The puncture rod is characterized in that: the puncture rod (300) includes a puncture mechanism (1) and a handle (2); the handle (2) includes a handle seat (21) and a handle cover (22);

A. The handle base (21) includes a positioning column (21-1) and a connecting groove (21-2);

B. The handle cover (22) includes a positioning hole (22-1) and a connecting convex step (22-2);

C. The positioning column (21-1) can be embedded in the positioning hole (22-1), and the connecting convex step (22-2) is embedded in the connecting groove (21-2) to form unevenness Snap-fit connection; the handle seat (21) and the handle cover (22) are connected together by a concave-convex card to form the handle (2);

D. The puncture mechanism (1) is connected to the handle (2) to form the puncture rod (300).
The puncture rod according to claim 1, characterized in that: the puncture mechanism (1) is connected to the handle (2) as a whole by way of encapsulation.
The puncture rod according to claim 2, characterized in that: the puncture mechanism (1) is provided with at least one anti-rotation hole (1-1) at the rubberized connection.
The puncture rod according to claim 1, wherein the puncture mechanism (1) is an optical puncture mechanism (11).
The puncture rod according to claim 4, wherein the optical puncture mechanism (11) includes an instrument channel (11-1) and an observation end (11-2).
The puncture rod according to claim 1, wherein the positioning hole (22-1) is provided with a reinforced convex step (22-11).
The puncture rod according to claim 1, wherein the puncture rod (300) further includes a locking mechanism (3).
The puncture rod according to claim 7, characterized in that: the locking mechanism (3) is a screw-type locking mechanism, or a snap-type locking mechanism, or a shrapnel-type locking mechanism.
The puncture rod according to claim 1, wherein the puncture rod (300) further includes a connecting mechanism (4).
The puncture rod according to claim 9, characterized in that: the connecting mechanism (4) is a rotary connecting mechanism, a concave-convex snap-fitting connecting mechanism, or an interference-fitting connecting mechanism.
The puncture rod according to claim 9, characterized in that: the connecting mechanism (4) is a concave-convex snap-fit type connecting mechanism; the connecting mechanism (4) includes a connecting hook (41) and a connecting bridge (42); The connecting bridge (42) is provided with a positioning groove (42-1) and an instrument through hole (42-2); the handle seat (21) of the puncture rod (300) also includes a positioning block (21-3); The positioning block (21-3) can be embedded in the positioning groove (42-1) to connect the connecting mechanism (4) and the handle (2) together.
The puncture rod according to claim 1, wherein the puncture rod (300) is made of biomedical materials.
The puncture device is characterized in that: the puncture device (400) contains the puncture rod (300) according to claim 1.
The puncture device according to claim 13, wherein the puncture device (400) comprises a sheath (200) and a puncture rod (300).