Stable and safe cutting knife

Abstract

The utility model relates to the technical field of cutting knives, in particular to a stable and safe cutting knife which comprises a knife head, a knife rod and a connecting pin. The tool bit is of an I-shaped structure, injection molding blocks are installed at the upper end and the lower end of the tool bit, the front end of the tool bar is welded to the right side, the tail end of the tool bar is integrally connected, and a connecting pin is fixed to the middle of the tool bar. The connecting pins comprise a right connecting pin and a left connecting pin, a connecting column I is arranged at the front end in the right connecting pin, and two groups of connecting columns II are arranged in the middle of the right connecting pin; the left connecting pin is provided with through holes used for locking the first connecting column and the second connecting column. Cylindrical clamping grooves are formed in the tail ends of the right connecting pin and the left connecting pin; two groups of clamping blocks I are symmetrically arranged in the clamping grooves up and down; a stop block is rotationally connected to the first connecting column, the top end of the stop block abuts against the cutter bar, and the tail end of the stop block is rotationally connected to the connecting pin. By improving the design of the injection molding rubber block, the connecting pin and the tail end of the cutter bar, the use safety and stability are improved, the operation and the use are convenient, and the popularization is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting knives, in particular to a stable and safe cutting knife. Background Art

[0002] Generally, staplers are divided into single-use or multiple-use staplers, imported or domestic staplers. It is a medical device that replaces traditional manual suturing. Due to the development of modern science and technology and the improvement of manufacturing technology, staplers used in clinical practice are reliable in quality, easy to use, tight, and of appropriate tightness. In particular, they have the advantages of fast suturing, simple operation, and few side effects and surgical complications. They also make it possible to remove tumors that were previously inoperable. Figure 5 The figure shows a cutting knife assembly in an existing stapler, in which the buffer pads at the bottom of the injection-molded rubber on both sides of the knife head are flat, with a large contact area and high friction, which is easy to debond during use and has poor stability; the connecting pin is connected to the clamping block at the rear end of the knife rod, and the blade is easy to explode during use, with poor safety and stability. Utility Model Content

[0003] In order to overcome the existing deficiencies, the utility model provides a stable and safe cutting knife.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a stable and safe cutting knife, comprising a knife head, a knife rod and a connecting pin; the knife head is an I-shaped structure, with injection plastic blocks installed at the upper and lower ends, the front end of the knife rod is welded on the right side, the tail end of the knife rod is connected as a whole, and a connecting pin is fixed in the middle; the connecting pin comprises a right connecting pin and a left connecting pin, the front end of the right connecting pin is provided with a connecting column 1, and two groups of connecting columns 2 are provided in the middle; the left connecting pin is provided with a through hole for locking the connecting column 1 and the connecting column 2; the tail ends of the right connecting pin and the left connecting pin are provided with a cylindrical slot, and two groups of block 1 are symmetrically arranged in the cylindrical slot; a stop block is rotatably connected to the connecting column 1, the top of the stop block is buckled against the knife rod, and the tail end is rotatably connected to the connecting pin.

[0005] According to another embodiment of the utility model, the injection-molded rubber block further includes a fixed column, a buffer pad arranged on both sides of the fixed column and two groups of locking plates arranged at the bottom of the fixed column; the fixed column matches the injection hole at the top of the cutter head; the locking plate is an elliptical plate, which matches the locking hole at the top of the cutter head; and an arc-shaped protrusion is provided at the front end of the buffer pad.

[0006] According to another embodiment of the utility model, it further includes that the knife rod includes two groups of blade one and two groups of blade two; the front ends of the blade one and the blade two match the notches of the knife head, and the tail ends are provided with through holes corresponding to the connecting column two and a movable groove for placing the stop block; the blade one is provided with two groups of connecting pieces one, and a group of blade two is provided on the outer two sides respectively.

[0007] According to another embodiment of the utility model, it further includes that a group of connecting pieces 2 are provided in the middle of the blade 2, and the connecting pieces 1 are respectively provided in front and behind the connecting piece 2.

[0008] According to another embodiment of the utility model, the stop block further includes two groups of rotating plates whose tail ends are rotatably connected to the connecting column and a connecting block connected to the front end of the rotating plates; a groove matching the tail end of the knife rod is provided in the middle of the connecting block, and support blocks for easy pushing are provided on both sides.

[0009] According to another embodiment of the utility model, the right connecting pin is further provided with a clamping plate on the right side of the second connecting column, and a clamping block two which are symmetrically connected to the tail end of the knife rod are provided on the left side of the first connecting column; and a partition is provided at the tail end of the left connecting pin corresponding to the clamping plate.

[0010] According to another embodiment of the utility model, the partition plate and the clamping plate are combined to form a cylindrical clamping groove.

[0011] The beneficial effects of the utility model are as follows: 1. The use of soft plastic injection glue on the cutter head reduces friction, avoids debonding, and improves the stability of the cutting knife;

[0012] The arc-shaped protrusion of the buffer pad on the injection-molded rubber block changes the surface contact of the cutting knife head in the prior art into point and line contact, thereby reducing friction;

[0013] The knife bar is rotatably connected to the connecting pin, which changes the method of fixing the knife bar by a clamp block in the prior art, prevents the knife bar from bursting during use, and improves the safety of the product;

[0014] The cylindrical slot at the tail end of the connecting pin is fixedly connected to the stapler, which improves the convenience of product disassembly and assembly;

[0015] On one hand, the stop block clamps the rear end of the knife bar to ensure the stability of the knife bar during practical use; on the other hand, it can remind this product that it is a disposable product to confirm whether it is actually used. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is an exploded view of the utility model;

[0018] Figure 2 yes Figure 1 Right view of;

[0019] Figure 3 It is an assembly drawing of the utility model;

[0020] Figure 4 This is the installation diagram of the right connecting pin and the tool bar;

[0021] Figure 5 It is a schematic diagram of a cutting knife in the prior art.

[0022] In the figure, 1, the cutter head, 2, the cutter rod, 3, the connecting pin, 4, the injection molding block, 5, the right connecting pin, 6, the left connecting pin, 7, the connecting column 1, 8, the connecting column 2, 9, the cylindrical slot, 10, the card block 1, 11, the stop block, 12, the fixed column, 13, the buffer pad, 14, the locking plate, 15, the locking hole, 16, the blade 1, 17, the blade 2, 18, the movable groove, 19, the connecting plate 1, 20, the connecting plate 2, 21, the rotating plate, 22, the connecting block, 23, the groove, 24, the support block, 25, the partition, 26, the card plate, 27, the card block 2. DETAILED DESCRIPTION

[0023] like Figure 1 It is a structural schematic diagram of the utility model, a stable and safe cutting knife, comprising a cutter head 1, a cutter rod 2 and a connecting pin 3; the cutter head 1 is an I-shaped structure, with injection plastic blocks 4 installed at the upper and lower ends, the front end of the cutter rod 2 is welded on the right side, the tail end of the cutter rod 2 is integrally connected, and a connecting pin 3 is fixed in the middle; the connecting pin 3 comprises a right connecting pin 5 and a left connecting pin 6, the front end of the right connecting pin 5 is provided with a connecting column 1 7, and two groups of connecting columns 2 8 are provided in the middle; the left connecting pin 6 is provided with a through hole for locking the connecting column 1 7 and the connecting column 2 8; the tail ends of the right connecting pin 5 and the left connecting pin 6 are provided with a cylindrical slot 9, and two groups of blocks 10 are symmetrically arranged in the cylindrical slot 9; a stop block 11 is rotatably connected to the connecting column 7, the top of the stop block 11 is buckled against the cutter rod 2, and the tail end is rotatably connected to the connecting pin 3.

[0024] According to another embodiment of the utility model, the injection molding block 4 further includes a fixing column 12, a buffer pad 13 arranged on both sides of the fixing column 12 and two groups of locking plates 14 arranged at the bottom of the fixing column 12; the fixing column 12 matches the injection molding hole at the top of the cutter head 1; the locking plate 14 is an elliptical plate, which matches the locking hole 15 at the top of the cutter head 1; the front end of the buffer pad 13 is provided with an arc-shaped protrusion, so that the contact changes from surface contact to point contact and line contact, which reduces friction and also reduces the risk of debonding.

[0025] According to another embodiment of the utility model, the knife bar 2 further includes two groups of blade one 16 and two groups of blade two 17; the front ends of the blade one 16 and the blade two 17 match the notches of the knife head 1, and the tail ends are provided with through holes corresponding to the connecting column two 8 and a movable groove 18 for placing the stop block 11; the blade one 16 is provided with two groups of connecting plates one 19, and a group of blade two 17 is provided on the outer two sides respectively.

[0026] According to another embodiment of the utility model, further comprising: a group of connecting pieces 20 are provided in the middle of the second blade 17, and the connecting pieces 19 are respectively provided in front and behind the connecting pieces 20.

[0027] Specifically, the spaced-apart connecting piece 1 19 and the spaced-apart connecting piece 2 20 can improve the working stability of the knife bar 2 .

[0028] According to another embodiment of the utility model, the stop block 11 further includes two groups of rotating plates 21 whose rear ends are rotatably connected to the connecting column 7 and a connecting block 22 connected to the front end of the rotating plate 21; a groove 23 matching the rear end of the knife rod 2 is provided in the middle of the connecting block 22, and support blocks 24 for easy pushing are provided on both sides.

[0029] Specifically, the stop block 11 is rotated by the rotating disk 21 , and the supporting block 24 is pushed by both hands so that the slot 23 in the middle of the connecting block 22 is buckled into the movable slot 18 at the rear end of the knife rod 2 .

[0030] According to another embodiment of the utility model, the right connecting pin 5 is further provided with a clamping plate 26 on the right side of the connecting column 2 8, and a clamping block 27 symmetrically connected to the tail end of the knife rod 2 is provided on the left side of the connecting column 1 7; and a partition plate 25 is provided at the tail end of the left connecting pin 6 corresponding to the clamping plate 26.

[0031] Specifically, the second connecting column 8 and the second clamping block 27 are used to lock the connecting pin 3 at the rear end of the shank 1 .

[0032] According to another embodiment of the utility model, the partition plate 25 and the clamping plate 26 are combined to form a cylindrical clamping groove 9, which is convenient for connection to the stapler.

[0033] In the specific operation process, plastic injection blocks 4 are fixed on the upper and lower sides of the cutter head 1, and a cutter rod 2 is welded on the right side. The tail end of the cutter rod 2 is locked by a connecting pin 3, and the connecting pin 3 is fixed on the stapler. During operation, the stop block 11 is rotated to clamp the cutter rod 2.

[0034] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A stable and safe cutting knife, characterized in that: The invention comprises a cutter head (1), a cutter bar (2) and a connecting pin (3); the cutter head (1) is an I-shaped structure, with injection-molded rubber blocks (4) installed at the upper and lower ends, the front end of the cutter bar (2) is welded on the right side, the rear end of the cutter bar (2) is integrally connected, and a connecting pin (3) is fixed in the middle; the connecting pin (3) comprises a right connecting pin (5) and a left connecting pin (6); the front end of the right connecting pin (5) is provided with a connecting column 1 (7), and two groups of connecting columns 2 (8) are provided in the middle; the left connecting pin (6) is provided with a through hole for locking the connecting column 1 (7) and the connecting column 2 (8); the rear ends of the right connecting pin (5) and the left connecting pin (6) are provided with a cylindrical groove (9), and two groups of block 1 (10) are symmetrically arranged in the cylindrical groove (9); a stop block (11) is rotatably connected to the connecting column 1 (7), the top end of the stop block (11) is buckled against the cutter bar (2), and the rear end is rotatably connected to the connecting pin (3).

2. The stable and safe cutting knife according to claim 1, characterized in that: The injection molded rubber block (4) comprises a fixed column (12), a buffer pad (13) arranged on both sides of the fixed column (12), and two sets of locking plates (14) arranged at the bottom of the fixed column (12); the fixed column (12) matches the injection molding hole at the top of the cutter head (1); the locking plate (14) is an elliptical plate, matching the locking hole (15) at the top of the cutter head (1); and the front end of the buffer pad (13) is provided with an arc-shaped protrusion.

3. The stable and safe cutting knife according to claim 1, characterized in that: The knife bar (2) comprises two sets of blade one (16) and two sets of blade two (17); the front ends of the blade one (16) and the blade two (17) match the notches of the knife head (1), and the rear ends are provided with through holes corresponding to the connecting column two (8) and a movable groove (18) for placing the stop block (11); the blade one (16) is provided with two sets of connecting plates one (19), and one set of blade two (17) is provided on the outer sides respectively.

4. The stable and safe cutting knife according to claim 3, characterized in that: A group of connecting pieces 2 (20) is arranged in the middle of the second blade (17), and the connecting pieces 1 (19) are arranged in front and behind the connecting pieces 2 (20) respectively.

5. The stable and safe cutting knife according to claim 1, characterized in that: The stop block (11) comprises two sets of rotating plates (21) whose rear ends are rotatably connected to the connecting column (7) and a connecting block (22) connected to the front end of the rotating plates (21); a groove (23) matching the rear end of the knife rod (2) is provided in the middle of the connecting block (22), and supporting blocks (24) are provided on both sides for easy pushing.

6. The stable and safe cutting knife according to claim 1, characterized in that: The right connecting pin (5) is provided with a clamping plate (26) on the right side of the second connecting column (8), and a clamping block (27) is symmetrically provided on the left side of the first connecting column (7) and is clamped to the rear end of the knife rod (2); a partition plate (25) is provided at the rear end of the left connecting pin (6) corresponding to the clamping plate (26).

7. The stable and safe cutting knife according to claim 6, characterized in that: The partition plate (25) and the clamping plate (26) are combined to form a columnar clamping groove (9).

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