Cutter head assembly of incision knife

Abstract

The utility model relates to the technical field of surgical instruments, and discloses a knife head assembly of an incision knife, which comprises a knife head, a knife bar and an outer sheath tube, the knife head and the knife bar are arranged on a fixing sleeve and are fixed, a core bar is arranged on the left side of the fixing sleeve, the outer sheath tube is sleeved on the surface of the knife bar, and the outer sheath tube is arranged on the right side of the fixing sleeve. The surface of the outer sheath tube is provided with a connecting part used for connecting the outer sheath tube and the fixing sleeve, the surface of the outer sheath tube is provided with an adjusting part used for adjusting the outer sheath tube, and the cutter head assembly of the incision cutter can generate the characteristics of the rubber material through the rubber extrusion ring by arranging the adjusting part; the outer sheath tube can be effectively prevented from being deformed due to the fact that the extrusion force of the outer sheath tube is too large, the outer sheath tube can be adjusted or replaced by unscrewing the adjusting sleeve, after adjustment or replacement is completed, the outer sheath tube can be fastened by screwing the sleeve, adjustment can be achieved without firstly disconnecting the sleeve from the fixing sleeve, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument technology, specifically to a cutting head assembly for a cutting knife. Background Technology

[0002] High-frequency cutting tools are commonly used surgical instruments. For example, the high-frequency cutting tool with adjustable blade head disclosed in the announcement number "CN215079578U" realizes the movement and fixation of the outer sheath tube, and can adjust the length of the blade head exposed outside the outer sheath tube at any time, making it convenient to use and more adaptable.

[0003] However, during the adjustment process, the locking nut must be unscrewed before the outer sheath can be adjusted. Furthermore, when the locking nut is turned, it is easy for the locking nut to come into contact with and rub against the sleeve, causing the adjusting nut to rotate as well, which results in the outer sheath 7 being adjusted. This has certain drawbacks. Utility Model Content

[0004] The purpose of this invention is to provide a cutting head assembly for a cutting tool to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cutting head assembly for a cutting knife, comprising a cutting head, a cutting rod, and an outer sheath tube. The cutting head and the cutting rod are mounted on a fixed sleeve and are fixed. A core rod is provided on the left side of the fixed sleeve. The outer sheath tube is sleeved on the surface of the cutting rod. The surface of the outer sheath tube is provided with a connecting part for connecting the outer sheath tube to the fixed sleeve, and the surface of the outer sheath tube is provided with an adjusting part for adjusting the outer sheath tube.

[0006] The adjustment unit includes:

[0007] Tighten the sleeve; the tightening sleeve is used to secure the outer sheath.

[0008] Rubber compression rings are used to protect the outer sheath when tightening the sleeve to fix it.

[0009] The butt joint is used to connect with the fixed sleeve and install the outer sheath tube;

[0010] A sleeve is used to wrap around an outer sheath and support a screwed-on sleeve.

[0011] Preferably, the connecting tube is fixed on the left side of the sleeve and is snapped into the fixed sleeve. The tightening sleeve is located on the right side of the sleeve and is equipped with a rubber compression ring. The sleeve is fitted onto the surface of the outer sheath. By adjusting the length of the outer sheath inside the sleeve, the length of the cutter head exposed outside the outer sheath can be controlled. After adjustment, the outer sheath can be tightened by tightening the sleeve. There is no need to disconnect the sleeve from the fixed sleeve before adjustment, making it convenient to use.

[0012] Preferably, the tightening sleeve includes a connecting sleeve and an adjusting sleeve. The connecting sleeve is conical, and both the surface of the connecting sleeve and the inner side of the adjusting sleeve are threaded. The adjusting sleeve is threadedly connected to the thread on the surface of the connecting sleeve through its inner thread. An annular compression block is fixed to the inner side of the adjusting sleeve, and a rubber compression ring is fixed to the inner side of the connecting sleeve. By rotating the adjusting sleeve, the adjusting sleeve is moved to the left, and the adjusting sleeve moves together with the annular compression block. The annular compression block can abut against the connecting sleeve, causing the right side of the connecting sleeve to contract. This, in conjunction with the rubber compression ring, compresses and fixes the outer sheath. Due to the properties of the rubber material, the rubber compression ring can effectively prevent excessive compression force on the outer sheath, which could cause deformation of the outer sheath. By loosening the adjusting sleeve, the outer sheath can be adjusted or replaced, making it convenient to use.

[0013] Preferably, the threaded connector of the connecting part is sleeved on the surface of the sleeve, the surface of the sleeve is fixed with a stop, and the right side of the fixed sleeve is fixed with a connector. The stop restricts the threaded connector so that the stop cannot be completely separated from the sleeve. By threading the threaded connector and the connector together and tightening them, the installation of the sleeve can be completed, thereby realizing the installation of the outer sheath on the surface of the tool holder.

[0014] Compared with the prior art, the present invention provides a cutting head assembly for a cutting knife, which has the following beneficial effects:

[0015] The blade assembly of this cutting knife, through its adjustable part and the rubber compression ring, utilizes the properties of its own rubber material to effectively prevent excessive pressure on the outer sheath, thus avoiding deformation of the outer sheath. The outer sheath can be adjusted or replaced by loosening the adjusting sleeve. After adjustment or replacement, the outer sheath can be secured by tightening the sleeve. There is no need to disconnect the sleeve from the fixed sleeve before adjustment, making it convenient to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cutter head assembly of this utility model installed in the fixed sleeve.

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the enlarged structure of A in the middle;

[0018] Figure 3 This is a schematic cross-sectional view of the connection structure of the threaded connector and the adjustment part of this utility model;

[0019] Figure 4 This is a cross-sectional view of the screw-on sleeve structure of this utility model.

[0020] In the diagram: 1. Cutting head; 2. Outer sheath; 3. Connecting part; 31. Threaded connector; 32. Stop block; 33. Butt joint; 4. Adjusting part; 41. Tightening sleeve; 42. Rubber compression ring; 43. Butt joint; 44. Sleeve; 411. Connecting sleeve; 412. Adjusting sleeve; 413. Annular compression block; 5. Cutting bar; 6. Fixing sleeve; 7. Core rod. Detailed Implementation

[0021] like Figures 1-4 As shown, this utility model provides a technical solution: a cutting head assembly for a cutting knife, including a cutting head 1, a cutting rod 5, and an outer sheath tube 2. The cutting head 1 and the cutting rod 5 are mounted on a fixed sleeve 6 and fixed. A core rod 7 is provided on the left side of the fixed sleeve 6. The outer sheath tube 2 is sleeved on the surface of the cutting rod 5. A connecting part 3 for connecting the outer sheath tube 2 to the fixed sleeve 6 is provided on the surface of the outer sheath tube 2. An adjusting part 4 for adjusting the outer sheath tube 2 is provided on the surface of the outer sheath tube 2. The adjusting part 4 includes a tightening sleeve 41, a rubber compression ring 42, a connecting tube 43, and a sleeve 44.

[0022] The connecting tube 43 is fixed on the left side of the sleeve 44 and is snapped into the fixed sleeve 6. The tightening sleeve 41 is located on the right side of the sleeve 44 and is equipped with a rubber compression ring 42. The sleeve 44 is fitted onto the surface of the outer sheath tube 2. By adjusting the length of the outer sheath tube 2 inside the sleeve 44, the length of the cutter head 1 exposed outside the outer sheath tube 2 can be controlled. After adjustment, the outer sheath tube 2 can be tightened by tightening the sleeve 41. It is not necessary to disconnect the sleeve 44 from the fixed sleeve 6 before adjustment, which is convenient to use.

[0023] The tightening sleeve 41 includes a connecting sleeve 411 and an adjusting sleeve 412. The connecting sleeve 411 is conical, and both the surface of the connecting sleeve 411 and the inner side of the adjusting sleeve 412 are threaded. The adjusting sleeve 412 is threadedly connected to the thread on the surface of the connecting sleeve 411 through its inner thread. An annular compression block 413 is fixed to the inner side of the adjusting sleeve 412, and a rubber compression ring 42 is fixed to the inner side of the connecting sleeve 411. By rotating the adjusting sleeve 412, the adjusting sleeve 412 is controlled to move to the left. The adjusting sleeve 412 moves together with the annular compression block 413, which can abut against the connecting sleeve 411, causing the right side of the connecting sleeve 411 to contract. This, together with the rubber compression ring 42, compresses and fixes the outer sheath 2. Due to the properties of the rubber material, the rubber compression ring 42 can effectively prevent excessive compression force on the outer sheath 2, which could cause deformation of the outer sheath 2. By loosening the adjusting sleeve 412, the outer sheath 2 can be adjusted or replaced, making it convenient to use.

[0024] The connecting part 3 has a threaded connector 31, which is sleeved on the surface of the sleeve 44. A stop 32 is fixed on the surface of the sleeve 44, and a mating head 33 is fixed on the right side of the fixing sleeve 6. The stop 32 restricts the threaded connector 31, preventing the stop 32 from completely separating from the sleeve 44. By threading the threaded connector 31 and the mating head 33 together and tightening them, the installation of the sleeve 44 can be completed, thereby enabling the outer sheath tube 2 to be installed on the surface of the tool holder 5.

[0025] Based on the above implementation method, the threaded connector 31 and the mating connector 33 are threaded together and tightened to complete the installation of the sleeve 44, thereby enabling the outer sheath 2 to be installed on the surface of the tool holder 5. When it is necessary to adjust or replace the outer sheath 2, the adjusting sleeve 412 is loosened so that the connecting sleeve 411 is no longer tightened on the outer sheath 2. At this time, the outer sheath 2 can be adjusted or replaced. After adjustment or replacement, the adjusting sleeve 412 is rotated to control the adjusting sleeve 412 to move to the left. The adjusting sleeve 412 moves together with the annular extrusion block 413. The annular extrusion block 413 can abut against the connecting sleeve 411, causing the right side of the connecting sleeve 411 to contract. This, together with the rubber extrusion ring 42, compresses and fixes the outer sheath 2, making the operation convenient.

[0026] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A cutting head assembly for a cutting knife, comprising a cutting head (1), a cutting shank (5), and an outer sheath (2), characterized in that: The cutter head (1) and the cutter bar (5) are mounted on the fixed sleeve (6). The cutter head (1) and the cutter bar (5) are fixed. A core rod (7) is provided on the left side of the fixed sleeve (6). The outer sheath tube (2) is sleeved on the surface of the cutter bar (5). The surface of the outer sheath tube (2) is provided with a connecting part (3) for connecting the outer sheath tube (2) to the fixed sleeve (6). The surface of the outer sheath tube (2) is provided with an adjusting part (4) for adjusting the outer sheath tube (2). The adjustment unit (4) includes: Tighten the sleeve (41), which is used to secure the outer sheath (2); Rubber compression ring (42) is used to protect the outer sheath (2) when tightening the sleeve (41) to fix the outer sheath (2); Connector (43) is used to connect with the fixed sleeve (6) and to install the outer sheath (2); The sleeve (44) is used to wrap the outer sheath (2) and support the screw-on sleeve (41).

2. The blade assembly of a cutting tool according to claim 1, characterized in that: The connecting tube (43) is fixed on the left side of the sleeve (44), the connecting tube (43) is snapped into the fixing sleeve (6), the tightening sleeve (41) is located on the right side of the sleeve (44), the tightening sleeve (41) is provided with a rubber compression ring (42), and the sleeve (44) is fitted onto the surface of the outer sheath (2).

3. The blade assembly of a cutting tool according to claim 1, characterized in that: The tightening sleeve (41) includes a connecting sleeve (411) and an adjusting sleeve (412). The connecting sleeve (411) is tapered, and both the surface of the connecting sleeve (411) and the inner side of the adjusting sleeve (412) are provided with threads.

4. The blade assembly of a cutting tool according to claim 3, characterized in that: The adjusting sleeve (412) is threadedly connected to the thread on the surface of the connecting sleeve (411) through the thread on its inner side. An annular extrusion block (413) is fixed on the inner side of the adjusting sleeve (412), and the rubber extrusion ring (42) is fixed on the inner side of the connecting sleeve (411).

5. The blade assembly of a cutting tool according to claim 1, characterized in that: The connecting part (3) has a threaded connector (31), which is fitted onto the surface of the sleeve (44).

6. The blade assembly of a cutting tool according to claim 5, characterized in that: A stop (32) is fixed to the surface of the sleeve (44), and a connector (33) is fixed to the right side of the fixed sleeve (6).

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