CN215384445U

CN215384445U - Minimally invasive hook knife

Info

Publication number: CN215384445U
Application number: CN202121393809.7U
Authority: CN
Inventors: 姚海燕
Original assignee: Zhongshan Peoples Hospital
Current assignee: Zhongshan Peoples Hospital
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-01-04
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a minimally invasive hook knife which comprises a handle, wherein a knife bar is connected onto the handle, a hook part capable of being curled and unfolded is arranged at the front end of the knife bar, a control structure for controlling the hook part to change between a curling state and an unfolding state is arranged among the handle, the knife bar and the hook part, and when the hook part is unfolded through the hook part capable of being curled and unfolded, a cutting edge is exposed, so that the hook part can hook tissues in a body for cutting; when not needing to cut, the control colludes the portion crimping, makes it collude the mouth closed, avoids colluding when the internal removal minimal access colludes the sword of patient and cuts the internal tissue of cutting, promotes the convenience and the security of operation.

Description

Minimally invasive hook knife

[ technical field ] A method for producing a semiconductor device

The utility model relates to medical instruments, in particular to a minimally invasive hook knife.

[ background of the utility model ]

When the minimally invasive surgery is performed, the minimally invasive hook knife is frequently used, and when the hook knife is stretched into or pulled out of a patient body in the surgery process, special care is needed, and the hook knife is enabled to keep away from the space by matching with other auxiliary instruments, so that the hook knife is prevented from hooking other non-cutting tissues, and the surgery difficulty is high.

The present invention has been made based on such a situation.

[ Utility model ] content

The utility model aims to overcome the defects of the prior art and provides the minimally invasive hook knife with simple structure and good safety performance.

The utility model is realized by the following technical scheme:

the minimally invasive hook knife comprises a handle, wherein a knife rod is connected onto the handle, a hook part capable of being curled and unfolded is arranged at the front end of the knife rod, and a control structure used for controlling the hook part to change between a curled state and an unfolded state is arranged among the handle, the knife rod and the hook part.

The minimally invasive hooking knife comprises a plurality of sections of bent knife blocks, the inner side of each knife block is provided with a cutting edge, the outer side of each knife block is smooth, one section of knife block close to the knife bar is hinged with the knife bar, and two adjacent sections of knife blocks are hinged.

The minimally invasive hooking knife comprises a steel cable with one end connected to a knife block with a knife tip, a buckling and pressing piece is arranged on the handle and connected with the other end of the steel cable, the knife block is pulled through the steel cable and turned outwards when buckled, elastic pieces are respectively arranged between two adjacent sections of the knife block and between a section of the knife block close to the knife bar and the knife bar, and the elastic pieces are used for jacking the knife block to enable the hooking part to be curled and contracted so as to enclose the cutting edge inside.

According to the minimally invasive hook knife, the hook part and the back part of the knife bar are provided with the concave grooves, and the steel cable is arranged in the grooves.

The minimally invasive hook knife comprises two sections of knife blocks.

Compared with the prior art, the utility model has the following advantages:

according to the minimally invasive hook knife, through the hook part capable of being curled and unfolded, when the hook part is controlled to be unfolded and the cutting edge is exposed, the hook part can hook the tissues in a body for cutting; when not needing to cut, the control colludes the portion crimping, makes it collude the mouth closed, avoids colluding when the internal removal minimal access colludes the sword of patient and cuts the internal tissue of cutting, promotes the convenience and the security of operation.

[ description of the drawings ]

The following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings, in which:

FIG. 1 is a schematic structural view of a minimally invasive hook blade according to the present invention;

FIG. 2 is a schematic structural view of a hook portion of the minimally invasive hook knife of the present invention when the hook portion is curled to close the hook opening;

FIG. 3 is a schematic structural view of a hook portion of a minimally invasive hook knife according to the present invention in an open state;

fig. 4 is a schematic cross-sectional view of a knife block.

[ detailed description ] embodiments

The utility model is further described below with reference to the accompanying drawings:

the minimally invasive hook knife shown in fig. 1 to 4 comprises a handle 1, wherein a knife bar 2 is connected to the handle 1, a hook portion 3 capable of being folded and unfolded is arranged at the front end of the knife bar 2, and a control structure for controlling the hook portion 3 to change between a folded state and an unfolded state is arranged among the handle 1, the knife bar 2 and the hook portion 3.

In an embodiment as shown in fig. 2 and 3, the hook 3 includes a plurality of curved segments 4, the segments 4 have cutting edges on the inner side and smooth outer sides, one segment 4 adjacent to the tool bar 2 is hinged to the tool bar 2, and two adjacent segments 4 are hinged to each other, preferably at the inner edge of the segment 4. As an embodiment of the hook part 3, the knife block 4 has two sections, and the structure is simple.

As shown in fig. 2 and fig. 3, in an embodiment, the control structure includes a steel cable 5 having one end connected to the knife block 4 where the knife tip is located, the handle 1 is provided with a buckling member 6 connected to the other end of the steel cable 5 and pulling and turning the knife block 4 outwards through the steel cable 5 when buckling, elastic members 7 are respectively disposed between two adjacent knife blocks 4 and between a knife block 4 close to the knife bar 2 and the knife bar 2, and the knife block 4 is pressed by the elastic members 7 to crimp the hook 3 and enclose the cutting edge inside. As an embodiment of the elastic element 7, the elastic element 7 may be a spring, and a slot is formed on the opposite surface of the adjacent two segments of the cutter blocks 4 for placing the spring.

In one embodiment, as shown in fig. 2 to 4, the hook 3 and the back of the tool holder 2 are provided with a concave groove 8, and the cable 5 is placed in the groove 8. Because the minimally invasive hooking knife is small in structure, the steel cable 5 is positioned and limited through the groove 8, the structure is simple, and the manufacture is convenient.

When the minimally invasive hook knife is held by a handle, the pressing piece 6 is buckled by fingers, the outermost section of the knife block 4 is pulled by the steel cable 5, and other knife blocks 4 are driven to rotate relative to the knife bar 2, so that the hook part 3 is opened, and a cutting edge is exposed for cutting the hook part 3; when the cutting is not needed, the buckling and pressing piece 6 is loosened, all the knife blocks 4 rotate mutually to realize curling under the elastic action of the elastic piece 7, the outermost knife block 4 is enabled to be curled to be close to the knife bar 2, the hooking opening of the hooking part 3 is blocked, the situation that the minimally invasive hooking knife is moved in a patient body to hook and cut tissues in the body is avoided, and the convenience and the safety of the operation are improved.

Claims

1. A minimally invasive hooked knife is characterized in that: including handle (1), be connected with cutter arbor (2) on handle (1), the front end of cutter arbor (2) is equipped with can roll up and open portion (3) of colluding, be equipped with between handle (1), cutter arbor (2) and portion (3) of colluding and be used for controlling portion (3) of colluding and change the control structure between the two states of curling and opening.

2. The minimally invasive hook knife according to claim 1, characterized in that: the hook part (3) comprises a plurality of sections of bent cutter blocks (4), the inner side of each cutter block (4) is provided with a cutting edge, the outer side of each cutter block is smooth, one section of cutter block (4) close to the cutter bar (2) is hinged with the cutter bar (2), and two adjacent sections of cutter blocks (4) are hinged.

3. The minimally invasive hook knife according to claim 2, characterized in that: control structure includes that one end is connected steel cable (5) on sword piece (4) at knife tip place, be equipped with the other end of connecting steel cable (5) on handle (1) and buckle casting die (6) that outwards turn over sword piece (4) pulling and open through steel cable (5) when withholding, adjacent two festival be equipped with elastic component (7) between sword piece (4), between a section sword piece (4) and the cutter arbor (2) that are close to cutter arbor (2) respectively, make colluding portion (3) crimple and enclose the blade in the inboard through elastic component (7) with sword piece (4) roof pressure.

4. The minimally invasive hook knife according to claim 3, characterized in that: the back of the hook part (3) and the back of the tool bar (2) are provided with concave grooves (8), and the steel cable (5) is arranged in the grooves (8).

5. The minimally invasive hook knife according to claim 2, characterized in that: the knife block (4) has two sections.